CN107203152B - A kind of energy-saving device and the weight testing method that economizes on electricity - Google Patents
A kind of energy-saving device and the weight testing method that economizes on electricity Download PDFInfo
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- CN107203152B CN107203152B CN201710455957.9A CN201710455957A CN107203152B CN 107203152 B CN107203152 B CN 107203152B CN 201710455957 A CN201710455957 A CN 201710455957A CN 107203152 B CN107203152 B CN 107203152B
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Abstract
A kind of energy-saving device provided by the invention and economize on electricity weight testing method, are related to amount of electricity saving detection field.It is switched in energy-saving mode and bypass mode by controlling energy-saving device, data acquisition unit acquires economize on electricity test data of the energy-saving device in economize on electricity test, makes processing and control element (PCE) that the amount of electricity saving loaded when energy-saving device operation be calculated based on economize on electricity test data；Data acquisition unit is acquired with electric parameter of the prefixed time interval to energy-saving device input terminal, when electric parameter variable quantity is more than preset threshold, new economize on electricity test is carried out, to adapt to the variation of electric load, is solved the problems, such as in the prior art because electric load time variation causes test result inaccurate；Processing and control element (PCE) carries out Effective judgement when receiving economize on electricity test data, when test data of economizing on electricity is unsatisfactory for validity, economize on electricity test is continued to energy-saving device, the calculating of next step is just carried out when test data of economizing on electricity meets validity, ensure that the accuracy of amount of electricity saving detection.
Description
Technical Field
The invention relates to the field of electricity saving quantity detection, in particular to electricity saving equipment and an electricity saving quantity testing method.
Background
The operation condition of the electrical equipment changes along with the change of the process load, the electric power actually used for doing work cannot be kept constant, and the consumed electric energy in the same time period cannot be equal. The conventional power-saving test can only use the working conditions of the like to compare the power degrees in different time periods under the condition that external work and power supply of a power grid are kept unchanged, the conventional test method has no practicability aiming at the time variation of the current power load, and the tested data also has no authenticity and reliability.
Disclosure of Invention
The invention aims to provide a power saving device and a power saving amount testing method, wherein the power saving device is switched between a power saving mode and a bypass mode by carrying out power saving testing on the power saving device, and a data acquisition unit acquires power saving testing data of the power saving device in the power saving testing, so that a processing control unit calculates the power saving amount of a load when the power saving device runs on the basis of the power saving testing data; the data acquisition unit acquires the electrical parameters of the input end of the power saving device at preset time intervals, and performs a new power saving test when the change of the electrical parameters exceeds a preset threshold value so as to adapt to the change of the electrical parameters caused by load change or power supply change and the like, thereby solving the problem of inaccurate test result caused by time-varying electrical load in the prior art; the processing control unit judges the validity of the electricity-saving test data when receiving the electricity-saving test data, when the electricity-saving test data does not meet the validity, the electricity-saving test is continuously carried out on the electricity-saving equipment until the electricity-saving test data meets the validity, and the next calculation is carried out, so that the truth and reliability of electricity-saving quantity detection are ensured.
The invention is realized by the following steps:
the input end of the power saving device is connected with a three-phase power supply, the output end of the power saving device is connected with a load, a metering table for recording information of the three-phase power supply and the power saving amount testing device are additionally arranged on the power saving device, the power saving testing device comprises a data acquisition unit and a processing control unit, the processing control unit is electrically connected with the data acquisition unit, and the data acquisition unit is electrically connected with the metering table;
the data acquisition unit is used for acquiring electrical parameter data of the input end of the power-saving equipment at preset time intervals and sending the electrical parameter data to the processing control unit, wherein the electrical parameter data comprise each phase voltage and each phase power factor of a three-phase circuit;
and the processing control unit compares the currently received electric parameter data with the previously received electric parameter data, and performs the electricity saving test on the electricity saving equipment when the comparison result meets the test condition.
Furthermore, the data acquisition unit is also used for acquiring power saving test data and the electricity reading of the meter and sending the power saving test data and the electricity reading to the processing control unit when the power saving device is subjected to power saving test;
and when the received power saving test data meet a preset effective condition, the processing control unit calculates power saving data based on the power saving test data and the electricity degree reading.
Further, when the received power saving test data does not meet the preset effective condition, the processing control unit performs the next power saving test on the power saving device until the power saving test data meets the preset effective condition.
Furthermore, the electricity-saving quantity testing device also comprises a sending unit which is electrically connected with the processing control unit;
the transmitting unit is used for transmitting the electric parameter data, the electricity-saving test data and the electricity-saving data.
A power saving amount test method is applied to the power saving equipment, the power saving amount test device further comprises a sending unit electrically connected with the processing control unit, and the power saving amount test method comprises the following steps:
the data acquisition unit acquires electrical parameter data of the input end of the power-saving equipment at preset time intervals and sends the electrical parameter data to the processing control unit, wherein the electrical parameter data comprise each phase voltage and each phase power factor of a three-phase circuit;
the processing control unit receives the electrical parameter data, performs power saving test on the power saving equipment when the electrical parameter data meet preset test conditions, and the data acquisition unit acquires power saving test data and sends the power saving test data to the processing control unit;
when the received power saving test data meet preset effective conditions, the processing control unit calculates power saving data based on the power saving test data;
the transmitting unit transmits the electrical parameter data, the power saving test data and the power saving data.
Further, the processing control unit receives the electrical parameter data, performs the power saving test on the power saving device when the electrical parameter data meets a preset test condition, and the step of acquiring the power saving test data by the data acquisition unit and sending the power saving test data to the processing control unit includes:
the processing control unit receives the electric parameter data, compares the currently received electric parameter data with the previously received electric parameter data, and performs a power saving test on the power saving equipment when a comparison result meets a test condition;
the data acquisition unit acquires power saving test data and sends the power saving test data to the processing control unit;
when the received power saving test data do not meet the preset effective conditions, the processing control unit controls the data acquisition unit to delete the power saving test data, and carries out the next power saving test on the power saving equipment until the power saving test data meet the preset effective conditions.
Further, the data acquisition unit acquires electrical parameter data of the input end of the power saving device at preset time intervals, and sends the electrical parameter data to the processing control unit, wherein the electrical parameter data includes voltages and power factors of phases of a three-phase circuit, and the step of receiving the electrical parameter data by the processing control unit includes:
the processing control unit receives the electric parameter data, compares each phase voltage received currently with each phase voltage received last time respectively, compares each phase power factor received currently with each phase power factor received last time respectively, and performs a power saving test on the power saving device when the change value of any phase voltage in the three-phase voltage received currently and the voltage received last time exceeds a preset voltage value or when the change value of any phase power factor in the three-phase power factor received currently and the power factor received last time exceeds a preset power factor value.
Further, the working modes of the power saving device include a power saving mode and a bypass mode, and the step of collecting power saving test data by the data collection unit and sending the power saving test data to the processing control unit includes:
the working mode of the power saving equipment is switched to a power saving mode, and the data acquisition unit acquires first active power and first passive power input by the power saving equipment in the power saving mode;
the working mode of the power saving equipment is switched to a bypass mode, and the data acquisition unit acquires second active power and second reactive power input by the power saving equipment in the bypass mode;
the working mode of the power saving equipment is switched to a power saving mode, and the data acquisition unit acquires third active power and third reactive power input by the power saving equipment in the power saving mode to complete the power saving test;
the data acquisition unit acquires a forward active power reading and a forward reactive power reading of the meter in the power saving test process;
the data acquisition unit sends the electricity-saving test data to the processing control unit, wherein the electricity-saving test data comprises the forward active power reading, the forward reactive power reading, the first active power, the first reactive power, the second active power, the second reactive power, the third active power and the third reactive power.
Further, when the received power saving test data does not satisfy a preset effective condition, the processing control unit controls the data acquisition unit to delete the power saving test data of this time, and performs the next power saving test on the power saving device until the power saving test data satisfies the preset effective condition, including:
the processing control unit compares the received first active power with the received third active power, when the change rate of the third active power based on the first active power exceeds a preset change rate, the processing control unit controls the data acquisition unit to delete the power saving test data, and then the power saving device carries out the next power saving test until the change rate of the third active power based on the first active power does not exceed the preset change rate.
Further, when the received power saving test data meets a preset effective condition, the step of calculating power saving data based on the power saving test data by the processing control unit comprises:
when the received power saving test data meet a preset effective condition, the processing control unit calculates an active power saving rate according to the first active power and the second active power, and calculates a reactive power saving rate according to the first reactive power and the second reactive power;
the processing control unit calculates an active power saving amount according to the active power saving rate and the forward active power reading, and calculates a reactive power saving amount according to the reactive power saving rate and the forward reactive power reading;
the processing control unit calculates an active power reading in a non-power-saving state according to the active power saving quantity and the forward active power reading, and calculates a reactive power reading in the non-power-saving state according to the reactive power saving quantity and the forward reactive power reading;
the processing control unit calculates an average power factor under the power saving mode according to the active power reading under the power saving state and the reactive power reading under the power saving state, and calculates an average power factor under the non-power saving mode according to the active power reading under the non-power saving state and the reactive power reading under the non-power saving state;
the processing control unit acquires a first power rate adjustment coefficient according to the average power factor in the power saving mode and acquires a second power rate adjustment coefficient according to the average power factor in the non-power saving mode;
the processing control unit calculates power saving benefits according to the first power adjustment coefficient, the second power adjustment coefficient, the positive active power reading, the active power saving quantity, the active power reading in the non-power saving state and the electricity price, and the power saving data comprise the active power saving rate, the reactive power saving rate, the active power saving quantity, the reactive power saving quantity, the active power reading in the non-power saving state, the reactive power reading in the non-power saving state, the average power factor in the power saving mode, the average power factor in the non-power saving mode, the first power adjustment coefficient, the second power adjustment coefficient and the power saving benefits.
Compared with the prior art, the invention has the following beneficial effects: according to the power saving equipment and the power saving amount testing method provided by the invention, the power saving equipment is subjected to power saving testing, the power saving equipment is switched between a power saving mode and a bypass mode, and the data acquisition unit acquires power saving testing data of the power saving equipment in the power saving testing, so that the processing control unit calculates the power saving amount of a load during the operation of the power saving equipment based on the power saving testing data; the data acquisition unit acquires the electrical parameters of the input end of the power saving device at preset time intervals, and performs a new power saving test when the change of the electrical parameters exceeds a preset threshold value so as to adapt to the change of the electrical parameters caused by load change or power supply change and the like, thereby solving the problem of inaccurate test result caused by time-varying electrical load in the prior art; the processing control unit judges the validity of the electricity-saving test data when receiving the electricity-saving test data, when the electricity-saving test data does not meet the validity, the electricity-saving test is continuously carried out on the electricity-saving equipment until the electricity-saving test data meets the validity, and the next calculation is carried out, so that the truth and reliability of electricity-saving quantity detection are ensured.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic structural diagram of a power saving device according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram showing another structure of a power saving device according to a first embodiment of the present invention.
Fig. 3 is a flowchart illustrating a power saving amount testing method according to a second embodiment of the present invention.
Icon: 100-power saving devices; 110-electricity-saving quantity testing device; 111-a process control unit; 113-a data acquisition unit; 115-a transmitting unit; 130-meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power saving device according to a first embodiment of the present invention.
The power saving device 100 is connected between the three-phase power supply and the load, the input end of the power saving device 100 is electrically connected with the three-phase power supply, and the output end of the power saving device 100 is electrically connected with the load, so that the power consumption of the load can be saved during power consumption of the load. The power saving device 100 comprises a power saving amount testing device 110 and a meter 130, wherein the power saving amount testing device 110 comprises a processing control unit 111 and a data acquisition unit 113, the processing control unit 111 is electrically connected with the data acquisition unit 113, and the data acquisition unit 113 is electrically connected with the meter 130.
In this embodiment, the meter 130 is used to record the power information supplied by the three-phase power supply to the load.
In this embodiment, the data acquisition unit 113 is configured to acquire the electrical parameter data at the input end of the power saving device 100 at preset time intervals and send the electrical parameter data to the processing control unit 111. Wherein the electrical parameter data comprises the phase voltages and the phase power factors of the three-phase power supply.
In this embodiment, the process control unit 111 receives electrical parameter data for each time interval. Comparing the currently received electric parameter data with the electric parameter data received at a previous time interval, and performing a power saving test on the power saving device 100 when a difference value between any phase voltage in the currently received three-phase voltage and a previously received voltage exceeds a preset voltage value or when a difference value between any phase power factor in the currently received three-phase power factor and a previously received power factor exceeds a preset power factor value. The currently received electrical parameter data and the previous electrical parameter data have large changes, representing that the load or the power supply changes, and power saving tests are needed to accurately calculate the power saving amount.
In this embodiment, when the power saving device 100 is subjected to the power saving test, the data acquisition unit 113 acquires power saving test data in the power saving test and sends the power saving test data to the processing control unit 111. The power saving test data includes the electricity reading of the meter 130 collected by the data collection unit 113. The processing control unit 111 judges the validity of the power saving test data according to preset valid conditions, and when the power saving test data meets the valid conditions, the processing control unit 111 calculates the power saving data according to the power saving test data and the electricity degree reading. If the power saving test data does not meet the effective condition, the next power saving test is performed on the power saving device 100, and the processing control unit 111 does not perform power saving data calculation until the power saving test data meets the effective condition, so that the reliability of power saving data calculation is ensured, and the accuracy of the calculation result is ensured.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating another structure of a power saving device according to a first embodiment of the present invention.
The power saving amount testing device 110 further includes a sending unit 115 electrically connected to the processing control unit 111.
In this embodiment, the transmitting unit 115 is configured to transmit the electrical parameter data, the power saving test data, and the power saving data.
In a preferred embodiment of the present embodiment, the sending unit 115 sends the data to a remote terminal so that a worker can monitor or process the data in real time.
Second embodiment
Referring to fig. 3, fig. 3 is a schematic flow chart illustrating a power saving amount testing method according to a second embodiment of the invention.
In the present embodiment, the power saving amount test method is applied to the power saving device 100 described in the first embodiment, and is implemented by the following steps:
step S201: the data acquisition unit 113 acquires electrical parameter data at the input end of the power saving device 100 and sends the data to the processing control unit 111.
In this embodiment, the electrical parameter data collected by the data collecting unit 113 includes each phase voltage and each phase power factor of the three-phase power supply. Wherein, Ua、UbAnd UcA, B, C three-phase voltages, cos θa、cosθbAnd cos θcAnd respectively recording the collected data into a table I for the corresponding power factor.
Watch 1
Wherein, the vertical columns 1, 2, n and n +1 represent the number of times the electrical parameter data are acquired at preset time intervals, and the horizontal columns represent the specific data of the electrical parameter data.
Step S202: when the electrical parameter data received by the processing control unit 111 meets the preset test condition, the power saving device 100 is subjected to the power saving test, and the data acquisition unit 113 acquires the power saving test data and sends the power saving test data to the processing control unit 111.
Step S202 can be realized by dividing into two steps of sub-step S2021 and sub-step S2022:
substep S2021: the processing control unit 111 determines the received electrical parameter data according to preset test conditions.
In this embodiment, the processing control unit 111 first performs operation and judgment on the received electrical parameter data, compares the currently received phase voltage with the previously received phase voltage, compares the currently received phase power factor with the previously received phase power factor, and performs the power saving test on the power saving device 100 when the variation value of any one of the currently received three-phase voltage and the previously received voltage exceeds the preset voltage value or when the variation value of any one of the currently received three-phase power factor and the previously received power factor exceeds the preset power factor value, for example, as follows:
|Ua n-Ua n+1|≥1V；
|Ub n-Ub n+1|≥1V；
|Uc n-Uc n+1|≥1V；
|cosθa n-cosθa n+1|≥0.05；
|cosθb n-cosθb n+1|≥0.05；
|cosθc n-cosθc n+1|≥0.05。
wherein, the superscript n or (n +1) of the voltage and the power factor in each expression represents the electrical parameter data collected at the nth time or the (n +1) th time. The preset voltage value is preferably 1V, and can be other values; the predetermined power factor is preferably 0.05, but may be other values.
When any one of the above six conditions is satisfied, that is, a preset test condition is satisfied, the power saving device 100 is subjected to the power saving test, and the process proceeds to substep S2022. If the received electrical parameter does not satisfy the test condition, the process proceeds to step S201.
Substep S2022: the power saving device 100 is subjected to a power saving test, and the data acquisition unit 113 acquires power saving test data and transmits the power saving test data to the processing control unit 111.
In the present embodiment, the operation modes of the power saving device 100 include a power saving mode and a bypass mode. The power saving mode is that the power saving equipment 100 is connected between a load and a three-phase power supply, and the three-phase power supply is connected to the load after processing electricity by the power saving equipment 100; the bypass mode is that the power saving device 100 is not connected between a load and a three-phase power supply, and the three-phase power supply directly supplies power to the load without passing through the power saving device 100. When the power saving device 100 is subjected to the power saving test, the power saving test is divided into three stages:
in the first stage, the operating mode of the power saving device 100 is switched to the power saving mode, at this time, the load enters the power saving operating mode, and the data acquisition unit 113 acquires the first active power P input by the power saving device 100 at a certain time in this stageT1And a first reactive power QT1。
In the second stage, the operating mode of the power saving device 100 is switched to the bypass mode, at this time, the load operates in the non-power saving mode, and the data acquisition unit 113 acquires the second active power P input by the power saving device 100 at a certain time in this stageT2And a second reactive power QT2。
In the third stage, the working mode of the power saving device 100 is switched to the power saving mode, at this time, the load enters the power saving working mode, and the data acquisition unit 113 acquires the third active power P input by the power saving device 100 at a certain time in this stageT3And a third reactive power QT3. At this time, the primary power saving test is completed, and the data acquisition unit 113 records the forward active power EP and the forward reactive power EQ of the completion time meter table 130.
Power saving test data entry table (ii):
watch 2
Step S203: and judging whether the power saving test data is valid or not.
In this embodiment, the processing control unit 111 performs validity judgment on the received power saving test data under a preset valid condition. The first active power P of the first stageT1With the third active power P of the third stageT3Comparing the first active power P with the second active power PT3Based on the first active power PT1When the change rate of the current power saving test is not more than the preset change rate, the power saving test is judged to be effective, and the process goes to step S204.
The calculation and judgment process is as follows:
the preset change rate is preferably 1% in the formula, and may be other values.
When the effective conditions of the above formula are met, the representation shows that the work of the power saving device 100, the three-phase power supply and the load tends to be stable at the moment, no large electric quantity change exists, and the power saving data calculation of the next step can be carried out. If the effective conditions are not met, the power saving test is continued until the test data meet the effective conditions.
Step S204: the processing control unit 111 calculates power saving data based on the power saving test data when the received power saving test data satisfies a preset effective condition.
After confirming the effectiveness, the power saving rate was calculated as follows:
wherein,represents the active power saving rate of the ith power saving test,indicating the reactive power saving rate, P, of the ith power saving testT1 iRepresenting the first active power, P, of the ith power-saving testT2 iSecond active power, Q, representing the ith power-saving testT1 iFirst reactive power, Q, representing the ith power-saving testT2 iRepresenting the second reactive power of the ith power saving test.
After each power saving test is completed, the power saving device 100 operates in a power saving state, and the processing control unit 111 considers that the power saving device maintains a constant power saving rate until the load changes, starts the next power saving test, if the power saving test data is effective through data analysis, the power saving device 100 continues to operate in a power saving mode, and the power saving rate is new data obtained by the test; on the contrary, if the present power saving test data is invalid, the present test data is deleted, and the processing control unit 111 continues to control the power saving device 100 to operate with power saving, and considers that the power saving rate at this time remains unchanged.
And after the power saving rate is calculated, calculating the power saving amount. Recording the active power obtained after the first power-saving test in the power-saving test data as EP1And the reactive power obtained after the first power-saving test is finished is recorded as EQ1Correspondingly, the active power obtained after the ith power-saving test is finished is recorded as EPiAnd recording the reactive power obtained after the ith power-saving test is finished as EQi. The active power saving quantity EP is saved in one charging periodjAnd reactive power saving quantity EQjCan be derived by the following formula:
wherein i is the number of times of the power saving test, and n is a natural number.
If the reading of the active power in the non-power saving mode is recorded as EPw, the active power EP in the non-power saving stateWFor the active power EP and the active power saving quantity EP in the power saving statejSumming; if the reading of the reactive power under the non-power-saving mode is recorded as EQw, the reactive power EQw under the non-power-saving state is the reactive power EQ under the power-saving state and the reactive power saving quantity EQjThe sum can be obtained by:
EPw＝EP+EPj；
EQw＝EQ+EQj。
thus, the average power factor PFw in the non-power saving state and the average power factor PF in the power saving statejI.e. by the following formulaObtaining:
the power rate electric charge refers to the electric charge which is obtained by tracing the electric charge according to the percentage of the electric charge amount due to the fact that the power factor is lower than the national standard because the inductive load reactive power consumption of the power consumer is overlarge, and the average power factor PF in the non-energy-saving statewCorresponding force rate adjustment factor βwAnd average power factor PF of energy-saving statejCorresponding force rate adjustment factor βjData can be obtained by looking up a force rate adjustment coefficient table, and the total electricity saving profit M is obtained through the following formula:
M＝EPjx electric valence delta + (EP)w×βw－EP×βj) X electricity price delta.
Wherein (EP)jX power price delta) saves electricity charge for active power, ((EP)w×βw－EP×βj) X power price delta) saves electricity charges for reactive power.
Recording the power saving data into a table (three):
watch (III)
Step S205: and transmitting the electrical parameter data, the power saving test data and the power saving data.
In this embodiment, step S205 can be implemented by the transmitting unit 115 described in the first embodiment. The transmission unit 115 transmits the electrical parameter data, the power saving test data, and the power saving data. The method can be sent to terminal equipment such as a remote terminal, and is convenient for workers to carry out real-time monitoring or data processing. The electric parameter data, the power saving test data and the power saving data can be transmitted through three tables respectively recording respective data.
In step S203, the third active power PT3Based on the first active power PT1When the change rate exceeds the preset change rate, it is determined that the power saving test is invalid, and the process proceeds to step S206.
Step S206: deleting the power saving test data, and continuing to perform the power saving test until the power saving test data meets the preset effective conditions.
In this embodiment, after the power saving test is determined to be invalid and the power saving test data is deleted, the process returns to step S202 to continue the power saving test, validity determination is performed on the test point test data generated by the power saving test, and the process does not enter step S204 until the power saving test data is determined to be valid.
In this embodiment, when the power saving test data does not satisfy the preset valid condition, the next power saving test is performed. And if the preset effective condition is not met, the power saving test is carried out until the power saving test data meet the preset effective condition, the stability of the load is confirmed, and the accuracy of subsequent power saving amount calculation is ensured.
In summary, the invention provides a power saving device and a power saving amount testing method, wherein the power saving device is switched between a power saving mode and a bypass mode by performing a power saving test on the power saving device, and a data acquisition unit acquires power saving test data of the power saving device in the power saving test, so that a processing control unit calculates the power saving amount of a load when the power saving device operates based on the power saving test data; the data acquisition unit acquires the electrical parameters of the input end of the power saving device at preset time intervals, and performs a new power saving test when the change of the electrical parameters exceeds a preset threshold value so as to adapt to the change of the electrical parameters caused by load change or power supply change and the like, thereby solving the problem of inaccurate test result caused by time-varying electrical load in the prior art; the processing control unit judges the validity of the electricity-saving test data when receiving the electricity-saving test data, when the electricity-saving test data does not meet the validity, the electricity-saving test is continuously carried out on the electricity-saving equipment until the electricity-saving test data meets the validity, and the next calculation is carried out, so that the truth and reliability of electricity-saving quantity detection are ensured.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A power saving device is characterized in that the input end of the power saving device is connected with a three-phase power supply, the output end of the power saving device is connected with a load, a metering meter for recording information of the three-phase power supply and a power saving amount testing device are additionally arranged on the power saving device, the power saving amount testing device comprises a data acquisition unit and a processing control unit, the processing control unit is electrically connected with the data acquisition unit, and the data acquisition unit is electrically connected with the metering meter;
the data acquisition unit is used for acquiring electrical parameter data of the input end of the power-saving equipment at preset time intervals and sending the electrical parameter data to the processing control unit, wherein the electrical parameter data comprise each phase voltage and each phase power factor of a three-phase circuit;
and the processing control unit compares the currently received electric parameter data with the previously received electric parameter data, and performs the electricity saving test on the electricity saving equipment when the comparison result meets the test condition.
2. The power saving device of claim 1, wherein the data acquisition unit is further configured to acquire power saving test data and electricity readings of the meter and send the data to the process control unit when performing a power saving test on the power saving device;
and when the received power saving test data meet a preset effective condition, the processing control unit calculates power saving data based on the power saving test data and the electricity degree reading.
3. The power saving device according to claim 2, wherein the processing control unit performs a next power saving test on the power saving device until the power saving test data satisfies the preset effective condition when the received power saving test data does not satisfy the preset effective condition.
4. The power saving device according to claim 2 or 3, wherein the power saving amount testing apparatus further comprises a transmitting unit electrically connected to the processing control unit;
the transmitting unit is used for transmitting the electric parameter data, the electricity-saving test data and the electricity-saving data.
5. A power saving amount testing method applied to the power saving device according to any one of claims 1 to 4, wherein the power saving amount testing apparatus further includes a transmitting unit electrically connected to the processing control unit, and the power saving amount testing method includes:
the data acquisition unit acquires electrical parameter data of the input end of the power-saving equipment at preset time intervals and sends the electrical parameter data to the processing control unit, wherein the electrical parameter data comprise each phase voltage and each phase power factor of a three-phase circuit;
the processing control unit receives the electrical parameter data, performs power saving test on the power saving equipment when the electrical parameter data meet preset test conditions, and the data acquisition unit acquires power saving test data and sends the power saving test data to the processing control unit;
when the received power saving test data meet preset effective conditions, the processing control unit calculates power saving data based on the power saving test data;
the transmitting unit transmits the electrical parameter data, the power saving test data and the power saving data.
6. The power-saving amount testing method according to claim 5, wherein the processing control unit receives the electrical parameter data, performs the power-saving test on the power-saving device when the electrical parameter data meets a preset test condition, and the step of acquiring the power-saving test data by the data acquisition unit and sending the power-saving test data to the processing control unit comprises:
the processing control unit receives the electric parameter data, compares the currently received electric parameter data with the previously received electric parameter data, and performs a power saving test on the power saving equipment when a comparison result meets a test condition;
the data acquisition unit acquires power saving test data and sends the power saving test data to the processing control unit;
when the received power saving test data do not meet the preset effective conditions, the processing control unit controls the data acquisition unit to delete the power saving test data, and carries out the next power saving test on the power saving equipment until the power saving test data meet the preset effective conditions.
7. The power-saving amount testing method according to claim 6, wherein the data collecting unit collects electrical parameter data of the input terminal of the power saving device at preset time intervals, and transmits the electrical parameter data to the processing control unit, wherein the electrical parameter data includes voltages and power factors of phases of a three-phase circuit, and the step of receiving the electrical parameter data by the processing control unit includes:
the processing control unit receives the electric parameter data, compares each phase voltage received currently with each phase voltage received last time respectively, compares each phase power factor received currently with each phase power factor received last time respectively, and performs a power saving test on the power saving device when the change value of any phase voltage in the three-phase voltage received currently and the voltage received last time exceeds a preset voltage value or when the change value of any phase power factor in the three-phase power factor received currently and the power factor received last time exceeds a preset power factor value.
8. The power-saving amount testing method according to claim 6, wherein the operation modes of the power-saving device include a power-saving mode and a bypass mode, and the step of collecting power-saving test data by the data collection unit and sending the power-saving test data to the processing control unit includes:
the working mode of the power saving equipment is switched to a power saving mode, and the data acquisition unit acquires first active power and first passive power input by the power saving equipment in the power saving mode;
the working mode of the power saving equipment is switched to a bypass mode, and the data acquisition unit acquires second active power and second reactive power input by the power saving equipment in the bypass mode;
the working mode of the power saving equipment is switched to a power saving mode, and the data acquisition unit acquires third active power and third reactive power input by the power saving equipment in the power saving mode to complete the power saving test;
the data acquisition unit acquires a forward active power reading and a forward reactive power reading of the meter in the power saving test process;
the data acquisition unit sends the electricity-saving test data to the processing control unit, wherein the electricity-saving test data comprises the forward active power reading, the forward reactive power reading, the first active power, the first reactive power, the second active power, the second reactive power, the third active power and the third reactive power.
9. The power saving amount testing method according to claim 8, wherein the step of the processing control unit controlling the data acquisition unit to delete the power saving test data of the current time and performing the next power saving test on the power saving device until the power saving test data satisfies the preset effective condition when the received power saving test data does not satisfy the preset effective condition comprises:
the processing control unit compares the received first active power with the received third active power, when the change rate of the third active power based on the first active power exceeds a preset change rate, the processing control unit controls the data acquisition unit to delete the power saving test data, and then the power saving device carries out the next power saving test until the change rate of the third active power based on the first active power does not exceed the preset change rate.
10. The power-saving amount testing method according to claim 8, wherein the step of calculating, by the processing control unit, the power-saving data based on the received power-saving test data when the power-saving test data satisfies a preset validity condition includes:
when the received power saving test data meet a preset effective condition, the processing control unit calculates an active power saving rate according to the first active power and the second active power, and calculates a reactive power saving rate according to the first reactive power and the second reactive power;
the processing control unit calculates an active power saving amount according to the active power saving rate and the forward active power reading, and calculates a reactive power saving amount according to the reactive power saving rate and the forward reactive power reading;
the processing control unit calculates an active power reading in the bypass mode according to the active power saving quantity and the forward active power reading, and calculates a reactive power reading in the bypass mode according to the reactive power saving quantity and the forward reactive power reading;
the processing control unit calculates to obtain an average power factor under the power saving mode according to the active power reading under the power saving mode and the reactive power reading under the power saving mode, and calculates to obtain an average power factor under the bypass mode according to the active power reading under the bypass mode and the reactive power reading under the bypass mode;
the processing control unit acquires a first power factor adjustment coefficient according to the average power factor in the power saving mode and acquires a second power factor adjustment coefficient according to the average power factor in the bypass mode;
and the processing control unit calculates power saving benefits according to the first power adjustment coefficient, the second power adjustment coefficient, the positive active power reading, the active power saving quantity, the active power reading in the bypass mode and the electricity price, and the power saving data comprise the active power saving rate, the reactive power saving rate, the active power saving quantity, the reactive power saving quantity, the active power reading in the bypass mode, the reactive power reading in the bypass mode, the average power factor in the power saving mode, the average power factor in the bypass mode, the first power adjustment coefficient, the second power adjustment coefficient and the power saving benefits.
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| CN114336649A (en) * | 2020-06-16 | 2022-04-12 | 浙江南德电气有限公司 | Power distribution voltage reduction power-saving device and control method |
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| CN201765274U (en) * | 2010-08-24 | 2011-03-16 | 山东乐航节能科技股份有限公司 | Energy-saving rate tester |
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