CN106026099B - Primary frequency regulation of power network ability real-time monitoring system and method based on data analysis - Google Patents
Primary frequency regulation of power network ability real-time monitoring system and method based on data analysis Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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Abstract
The invention discloses primary frequency regulation of power network ability real-time monitoring systems and method based on data analysis, including signal picker module, the real-time load value of collected unit is sent respectively to first function setting module, comparator module and second function setting module；The first input end of the output access first selector module of first function setting module, the first input end of the output access second selector module of second function setting module, the output of comparator module are respectively connected to the set end of first selector module and second selector module；The real-time primary frequency modulation upper limit value that the first selector module of all grid-connected frequency modulation units is exported is summed；The real-time primary frequency modulation lower limiting value that the second selector module of all grid-connected frequency modulation units is exported is summed；The present invention realizes the reductive analysis of the Primary frequency control ability to unit in each load setting by upset test, can effective monitoring to the primary frequency modulation situation of each grid-connected frequency modulation unit, realize effective supervision and management.
Description
Technical field
The present invention relates to fired power generating unit frequency modulation fields, and in particular to the primary frequency regulation of power network ability based on data analysis is real-time
Monitoring system and method.
Background technology
Power system frequency is a very important parameter of whole system safe operation, is monitoring power quality and peace
One important indicator of full situation, no matter system frequency it is excessively high or it is too low can be to generating set, equipment of whole system etc.
Bring serious harm.The frequency Primary regulation that generating set participates in electric system belongs to ancillary service, directly influences
The quality of system frequency plays an important role to the stable operation of system.When generating imbalance power in system, the frequency of system
Rate will change, and frequency exceeds the permitted normal range (NR) of system, then the tune of all online generating sets in system
Speed system will automatic regulator generator group output electromagnetic power, frequency departure is made to be limited in the normal model of system permission
It encloses, so as to reach the new equilibrium state of system.Primary frequency modulation is when system frequency fluctuates, and automatically adjusts power generation
The output power of unit is adjusted into line frequency, quickly adjusts the normal range (NR) that frequency returns to system permission, is the frequency of short time
One of effective and reliable adjustment means that rate fluctuates widely.
Generating set primary frequency regulation function is the intrinsic function of Turbo-generator Set, mainly using boiler heat storage, in electricity
In the case that exception occurs in net, the requirement of quick response power grid, electric power grid frequency stabilization to make up network load gap, maintains electricity
The safety of net.The response that Primary regulation changes system frequency is fast, according to the statistics of IEEE, the Primary regulation of electric system synthesis
Characteristic time constant is generally at 10 seconds or so, since the chemical energy in combustion system does not change, with amount of stored heat
It reduces, the power of generator can return to original level again.The size of Primary frequency control ability and the governing system of generating set with
And the control mode of generating set has very important relationship.At present, the digital electro-hydraulic control system (DEH) of fired power generating unit obtains
Universal use, so that the primary frequency function of generating set is no longer the intrinsic control characteristic of governing system, and
It can be by artificially carrying out logic change and the operation of switching.With the reform that deepens continuously of electricity market, separation is netted by factory
Afterwards, the difficulty of examination and the management of generating set is increasingly come.The stability operation of generating set is only focused in partial power plant,
It is unwilling to participate in primary frequency modulation, worries that the frequent wave of governing system and therrmodynamic system can be caused by opening primary frequency function
It is dynamic, therefore since power plant cuts off the function of unit participation frequency Primary regulation for a long time, so as to cause entire power train
The Primary frequency control ability of system is in an extremely low level always, and can cause the incorrect operation of low frequency load shedding equipment,
The safe and stable operation of electric system is endangered, the frequency after the system of even resulting in is disturbed is collapsed rapidly.It is accurate and real-time
The Primary frequency control ability of generators in power systems group is assessed, could preferably increase the safe and stable operation matter of whole system
Amount.
At present, since the Primary frequency control ability to grid-connected unit can not realize effective prediction and monitoring, work as power grid
Significantly load fluctuation occurs, such as sends direct current locking outside and causes wholesale power loss, dispatching of power netwoks department can only be according to work(
Rate notch cuts away rapidly corresponding line load, and it is secondary that the method be easy to cause important load power-off, large area resident power failure etc.
Accident leads to larger social influence, not only unfavorable to normal production run, while is unfavorable for the safety and stability of power grid.Together
When, with the development of energy internet, for the southeast developed regions that dispatch from foreign news agency proportion is gradually increased, the unit for participating in frequency modulation is opposite
It reduces, higher requirement will be proposed to unit Primary frequency control ability in net.
Invention content
It is real the invention discloses the primary frequency regulation of power network ability based on data analysis to solve the shortcomings of the prior art
When monitoring system and method, the present invention by analytical judgment of the dispatching of power netwoks to single unit Primary frequency control ability, can be comprehensive
The overall fm capacity of fortune unit is rested in, targetedly carries out the circuit excision of corresponding amplitude.
To achieve the above object, concrete scheme of the invention is as follows：
Primary frequency regulation of power network ability real-time monitoring system based on data analysis, including：
Signal picker module send the real-time load value of collected unit respectively to first function setting module, ratio
Compared with device module and second function setting module；
The first input end of the output access first selector module of first function setting module, second function setting module
Output access second selector module first input end, the output of comparator module be respectively connected to first selector module and
The set end of second selector module；
First adder module, for the real-time primary tune for exporting the first selector module of all grid-connected frequency modulation units
Frequency upper limit value is summed, and obtains the real-time primary frequency modulation upper limit value of power grid；
Second adder module, for the real-time primary tune for exporting the second selector module of all grid-connected frequency modulation units
Frequency lower limiting value is summed, and obtains the real-time primary frequency modulation lower limiting value of power grid.
Further, the comparator module input signal is respectively：The machine of unit real-time load value and setting percentage
Group rated power is operating states of the units when thinking that unit real-time load is more than the unit rated power of setting percentage.
Further, the equal zero setting of the second input terminal of first selector module and second selector module.
Further, first function setting module is used to generate according to the unit that upset test counts in different load area
Interior primary frequency modulation upper limit value function, i.e. unit primary frequency modulation maximum increase ability.
Further, second function setting module is used to generate according to the unit that upset test counts in different load area
Interior primary frequency modulation lower limit value function, i.e. unit primary frequency modulation maximum reduce ability.
Primary frequency regulation of power network ability method for real-time monitoring based on data analysis, includes the following steps：
Using signal picker module by the real-time load value of collected unit send respectively to first function setting module,
Comparator module and second function setting module；
The first input end of the output access first selector module of first function setting module, second function setting module
Output access second selector module first input end, the output of comparator module be respectively connected to first selector module and
The set end of second selector module；
The real-time primary frequency modulation upper limit value that the first selector module of all grid-connected frequency modulation units exports is sent to first and is added
Summer block sums to obtain the real-time primary frequency modulation upper limit value of power grid；
Real-time primary frequency modulation lower limiting value for the second selector module of all grid-connected frequency modulation units to be exported is sent to
Two adder Modules sum to obtain the real-time primary frequency modulation lower limiting value of power grid, real by the real-time primary frequency modulation upper limit value of power grid and power grid
When primary frequency modulation lower limiting value can obtain current electric grid one piece frequency modulation space.
Further, primary frequency modulation upper lower limit value obtains in the first function setting module and second function setting module
Mode is：According to machine kludge installed capacity, 50%-100% rated power is averagely divided into 5 load settings, according to state
Family's power grid《Thermal power generation unit primary frequency modulation test guidance》Upset test is carried out respectively, and it is each comfortable different negative to count its respectively
Primary frequency modulation upper lower limit value, that is, primary frequency modulation spatial value in lotus section.
Further, if unit not running, the corresponding primary frequency modulation spatial value of all load settings of the unit is set to
“0”。
The present invention is realized by the reductive analysis to fm capacity under grid-connected unit difference operating mode to grid-connected unit whole one
The monitoring of secondary fm capacity can realize dispatching of power netwoks to the analytical judgment of single unit Primary frequency control ability and slap comprehensively
The overall fm capacity of fortune unit is held in, targetedly carries out the circuit excision of corresponding amplitude, the safety to ensure power grid is steady
Fixed operation provides safeguard.
Beneficial effects of the present invention：
(1) present invention realizes the conclusion point of the Primary frequency control ability to unit in each load setting by upset test
Analysis, can effective monitoring to the primary frequency modulation situation of each grid-connected frequency modulation unit, realize effective supervision and management；
(2) present invention can be rested in comprehensively by analytical judgment of the dispatching of power netwoks to single unit Primary frequency control ability
The overall fm capacity of unit is transported, targetedly carries out the circuit excision of corresponding amplitude, to ensure the safety and stability fortune of power grid
Row provides safeguard, and then ensure the safely, effectively operation of the electrical equipment and power equipment of users.
Description of the drawings
Fig. 1 handles schematic diagram for primary frequency regulation of power network spatial analysis；
Fig. 2 is the real-time primary frequency modulation space curve of power grid.
Specific embodiment：
The present invention is described in detail below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of primary frequency regulation of power network ability real-time monitoring system based on data analysis, including：
The signal picker module S send the real-time load value of collected machine set PLC 1 respectively to function sets module
F1H(x), comparator module CMP, function sets module F1L(x), pass through function sets module F1H(x)、F1L(x) this is obtained respectively
When unit real-time primary frequency modulation upper lower limit value；
Unit real-time load value in comparator module CMP compared with 30%Pe (the 30% of rated power), if unit
In " RUN " state, then real-time load is naturally larger than 30%Pe, and comparator module CMP exports on-off model " 1 " at this time, this
Signal is respectively connected to the set end S of selector module AXSEL1 and AXSEL2, its respective output is switched to Z1 ends respectively, i.e.,
By the real-time primary frequency modulation upper limit value of unit and lower limiting value △ P1HWith lower limiting value △ P1L；It is real if unit is in " shutdown " state
When load certainly less than 30%Pe, comparator module CMP exports on-off model " 0 " at this time, this signal is respectively connected to selector
Its respective output is switched to Z2 ends, i.e., by the real-time primary tune of unit by the set end S of modules A XSEL1 and AXSEL2 respectively
Frequency upper limit value and lower limiting value are set to constant 0.
It is as noted above, the real-time primary frequency modulation upper limit value of all grid-connected frequency modulation units is sent into adder Module Σ 1
Summation, the real-time primary frequency modulation lower limiting value of all grid-connected frequency modulation units is sent into adder Module Σ 2 and is summed, then can obtain this
When power grid real-time primary frequency modulation space.
According to Q/GDW 669-2011《Thermal power generation unit primary frequency modulation test guidance》Requirement in technical standard, unit
Participate in primary frequency modulation frequency modulation load variations upper amplitude limit can limit, but limited amplitude do not answer it is too small, it is specified that as follows：
(1)250MW>P0Fired power generating unit, limited amplitude >=10%P0；
(2)350MW≥P0The fired power generating unit of >=250MW, limited amplitude >=8%P0；
(3)500MW≥P0>The fired power generating unit of 350MW, limited amplitude >=7%P0；
(4)P0>The fired power generating unit of 500MW, limited amplitude >=6%P0。
A kind of primary frequency regulation of power network ability method for real-time monitoring based on data analysis, specifically includes following steps：
(1) inductive statistics of grid-connected frequency modulation unit Primary frequency control ability in each load setting；
(2) to power grid, the operating status of grid-connected frequency modulation unit analyzes and determines：If unit operation, it is negative at present to analyze it
Load setting section residing for lotus, and be presently in the corresponding primary frequency modulation spatial value of load setting and provided；If unit is not transported
The corresponding primary frequency modulation spatial value of all load settings of the unit, then be set to " 0 " by row；
(3) the whole primary frequency modulation spatial statistics in real time of power grid：By all grid-connected frequency modulation units of current time in regional power grid
The primary frequency modulation spatial value provided is added summation, it is concluded that current electric grid one piece frequency modulation space.
In the step (1), to the unit of frequency modulation grid-connected in regional power grid, according to machine kludge installed capacity, by 50%-
100%Pe (rated power) is averagely divided into 5 load settings, according to national grid《Thermal power generation unit primary frequency modulation is tested
Directive/guide》Upset test is carried out respectively, counts the primary frequency modulation upper lower limit value (i.e. one in its each comfortable different load section respectively
Secondary frequency modulation spatial value).
By taking certain 300MW fired power generating unit in the region of North China as an example, the minimum 8%*300MW of theoretical upper limit value of primary frequency modulation
=24MW, lower limiting value are -24MW.But due in actual motion, due to the stabilization combustion needs of underload section unit and high negative
Lotus section main vapour pressure deficiency etc. causes practical Primary frequency control ability that theoretical upper lower limit value, practical primary frequency modulation bound is not achieved
It is worth as shown in the table
According to standard, after the practical upper lower limit value of primary frequency modulation of every unit is obtained by conventional upset test, and according to
Its operating status, be obtained its it is cumulative and, then can obtain the real-time primary frequency modulation space of power grid, as shown in Figure 2.In Fig. 2, lines 1
It is theoretical upper limit value；Lines 2 are practical upper limit values；Lines 3 are real-time load values；Lines 4 are actual lower limit values；Lines 5 are reasons
By lower limiting value.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (8)
1. the primary frequency regulation of power network ability real-time monitoring system based on data analysis, it is characterized in that, including：
Signal picker module send the real-time load value of collected unit respectively to first function setting module, comparator
Module and second function setting module；
First function setting module output access first selector module first input end, second function setting module it is defeated
Go out to access the first input end of second selector module, the output of comparator module is respectively connected to first selector module and second
The set end of selector module；
First adder module, for the real-time primary frequency modulation for exporting the first selector module of all grid-connected frequency modulation units
Limit value is summed, and obtains the real-time primary frequency modulation upper limit value of power grid；
Second adder module, under the real-time primary frequency modulation that exports the second selector module of all grid-connected frequency modulation units
Limit value is summed, and obtains the real-time primary frequency modulation lower limiting value of power grid；
The real-time load value of the unit is in the comparator module compared with the 30% of rated power：
If the unit is in " RUN " state, the real-time load value is more than the 30% of the rated power, the comparator
Module output on-off model " 1 ", and the on-off model accesses the set end and described the of the first selector module
The set end of two selector modules cuts the output of the first selector module and the output of the second selector module
Shift to first input end, i.e., the real-time primary frequency modulation upper limit value of described unit and real-time primary frequency modulation lower limiting value；
If the unit is in " shutdown " state, the real-time load value is less than the 30% of the rated power, the comparator
Module output on-off model " 0 ", and the on-off model accesses the set end and described the of the first selector module
The set end of two selector modules cuts the output of the first selector module and the output of the second selector module
The second input terminal is shifted to, i.e., the real-time primary frequency modulation upper limit value of the unit and real-time primary frequency modulation lower limiting value are set to constant
0。
2. the primary frequency regulation of power network ability real-time monitoring system based on data analysis as described in claim 1, it is characterized in that, institute
Stating comparator module input signal is respectively：The unit rated power of unit real-time load value and setting percentage, that is, think machine
It is operating states of the units when group real-time load is more than the unit rated power of setting percentage.
3. the primary frequency regulation of power network ability real-time monitoring system based on data analysis as described in claim 1, it is characterized in that, the
The equal zero setting of the second input terminal of one selector module and second selector module.
4. the primary frequency regulation of power network ability real-time monitoring system based on data analysis as described in claim 1, it is characterized in that, the
One function sets module is for the primary frequency modulation upper limit of the generation according to the unit that upset test counts in different load section
Value function, i.e. unit primary frequency modulation maximum increase ability.
5. the primary frequency regulation of power network ability real-time monitoring system based on data analysis as claimed in claim 4, it is characterized in that, the
Two function sets modules are for primary frequency modulation lower limit of the generation according to the unit that upset test counts in different load section
Value function, i.e. unit primary frequency modulation maximum reduce ability.
6. the primary frequency regulation of power network ability method for real-time monitoring based on data analysis, it is characterized in that, include the following steps：
The real-time load value of collected unit is sent respectively to first function setting module using signal picker module, is compared
Device module and second function setting module；
First function setting module output access first selector module first input end, second function setting module it is defeated
Go out to access the first input end of second selector module, the output of comparator module is respectively connected to first selector module and second
The set end of selector module；
The real-time primary frequency modulation upper limit value that the first selector module of all grid-connected frequency modulation units exports is sent to first adder
Module sums to obtain the real-time primary frequency modulation upper limit value of power grid；
Real-time primary frequency modulation lower limiting value for the second selector module of all grid-connected frequency modulation units to be exported, which is sent to second, to be added
Summer block sums to obtain the real-time primary frequency modulation lower limiting value of power grid, passes through the real-time primary frequency modulation upper limit value of power grid and power grid real-time one
Secondary frequency modulation lower limiting value can obtain current electric grid one piece frequency modulation space.
7. the primary frequency regulation of power network ability method for real-time monitoring based on data analysis as claimed in claim 6, it is characterized in that, institute
Stating primary frequency modulation upper lower limit value acquisition modes in first function setting module and second function setting module is：According to machine kludge
50%-100% rated power is averagely divided into 5 load settings, according to national grid by installed capacity《Thermal power generation unit
Primary frequency modulation test guidance》Upset test is carried out respectively, counts the primary frequency modulation in its each comfortable different load section respectively
Upper lower limit value, that is, primary frequency modulation spatial value.
8. the primary frequency regulation of power network ability method for real-time monitoring based on data analysis as claimed in claim 6, it is characterized in that, if
The corresponding primary frequency modulation spatial value of all load settings of the unit is then set to " 0 " by unit not running.
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| CN113158536B (en) * | 2020-12-31 | 2022-06-28 | 江苏方天电力技术有限公司 | Primary frequency modulation capability calculation monitoring method and system |
| CN113361877B (en) * | 2021-05-24 | 2023-07-11 | 中广核研究院有限公司 | Statistical analysis method, device, equipment and medium for power grid frequency data |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2557647A2 (en) * | 2011-07-12 | 2013-02-13 | General Electric Company | Systems and devices for controlling power generation |
| CN104052072A (en) * | 2014-05-27 | 2014-09-17 | 国家电网公司 | Thermal power generating unit primary frequency modulation optimal control method and system based on amplitude keeping |
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2016
- 2016-05-20 CN CN201610344043.0A patent/CN106026099B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2557647A2 (en) * | 2011-07-12 | 2013-02-13 | General Electric Company | Systems and devices for controlling power generation |
| CN104052072A (en) * | 2014-05-27 | 2014-09-17 | 国家电网公司 | Thermal power generating unit primary frequency modulation optimal control method and system based on amplitude keeping |
Non-Patent Citations (1)
| Title |
|---|
| 300MW火电机组孤网运行控制策略;杨新等;《内蒙古电力技术》;20131231;第31卷(第5期);第94-100页 * |
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