CN221405889U

CN221405889U - MLPE ageing device

Info

Publication number: CN221405889U
Application number: CN202323055321.5U
Authority: CN
Inventors: 冯成; 陈健
Original assignee: Aichang Huizhi Suzhou New Energy High Tech Co ltd
Current assignee: Aichang Huizhi Suzhou New Energy High Tech Co ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-07-23
Anticipated expiration: 2033-11-13

Abstract

The utility model relates to the field of MLPE equipment detection, in particular to a MLPE aging device. The device mainly comprises MLPE equipment and an aging detector, wherein the aging detector comprises a power supply and a load, and a plurality of MLPE equipment are connected in series; the aging detector also comprises an analyzer connected with each MLPE devices and used for acquiring MLPE device voltage and current data; and two ends of each MLPE equipment are connected with a bypass device in parallel, and the bypass device is also connected with an analyzer and is used for shorting out the MLPE equipment with abnormality. The device can carry out ageing test to a plurality of MLPE equipment once only, and the whole set of device only needs a power and a load, has still reduced the required energy loss of test when improving detection efficiency.

Description

MLPE ageing device

Technical Field

The utility model relates to the field of MLPE equipment detection, in particular to a MLPE aging device.

Background

MLPE is a component-level power electronics device that is widely used in the field of photovoltaic power generation. In the industry chain of photovoltaic power generation, a single packaged panel is called a photovoltaic module; several modules are combined together, called a photovoltaic string; a plurality of photovoltaic strings are combined together to form a photovoltaic power plant. MLPE is directly arranged behind the minimum unit photovoltaic module and used for realizing the functions of shutdown, monitoring, optimization, inversion and the like so as to improve the photovoltaic power generation efficiency and protect the photovoltaic module.

Since MLPE is often in a long-term operating state, its lifetime is an important reference indicator for proving its quality and reliability. When the production leaves the factory, the ageing detection is often needed, namely, an experimental environment is built to enable the equipment to continuously run, and the working state of the equipment is tested. In the prior art, a sampling inspection mode is often adopted, namely, a plurality of products are randomly extracted from a batch of products, a detection platform is built one by one, and ageing detection is carried out on the products.

Although the technical scheme can realize the aim of controlling the quality of the whole product to a certain extent, the technical scheme has some problems. For example: the detection platform is built one by one, namely one power supply and one load are needed for detecting one MLPE device, a plurality of power supplies and a plurality of loads are needed to be configured when a plurality of MLPE devices are subjected to spot check, and the defects of low working efficiency and serious energy waste caused by long-time operation exist.

Disclosure of utility model

The utility model aims to provide a MLPE ageing device which can carry out ageing tests on a plurality of MLPE devices at one time, and the whole device only needs one power supply and one load, so that the detection efficiency is improved, and meanwhile, the energy consumption required by the tests is reduced.

A MLPE burn-in apparatus comprising a MLPE device and a burn-in detector, said burn-in detector comprising a power source and a load, wherein a plurality of said MLPE devices are connected in series; the aging detector further comprises an analyzer connected with each MLPE devices and used for acquiring voltage and current data of the MLPE devices; and two ends of each MLPE device are connected with a bypass in parallel, and the bypass is also connected with the analyzer and is used for short-circuiting the MLPE device with abnormality.

The device aims to perform aging test on MLPE equipment which is just produced and delivered, and test the reliability and the service life of the MLPE equipment in a long-time continuous working state. MLPE equipment is target inspected equipment, and a plurality of MLPE equipment are connected in series, so that the aim of one-time multi-inspection can be fulfilled, and the efficiency is improved.

The burn-in detector is used to perform a burn-in test on the MLPE device string that has been connected in series, which simulates its actual operating environment by connecting power and loads across the MLPE device string. In photovoltaic power generation, the photovoltaic panel receives solar energy and converts the solar energy into electric energy, and the electric energy is in the form of direct current, so that the power supply arranged in the aging detector is a bidirectional power supply in the prior art, and the power supply receives alternating current in a power grid and rectifies the alternating current into direct current, and the direct current is used for simulating direct current generated by the photovoltaic panel. In photovoltaic power generation, direct current generated by a photovoltaic panel is converted into alternating current by an inversion program and then is input into an alternating current power grid, so that a load arranged in the aging detector can be an inverter connected into the power grid, and the electric energy passing through MLPE equipment strings is conveyed back to the power grid again, so that energy consumption can be saved.

An analyzer is connected across each MLPE device in the MLPE device set for continuously reading electrical characteristic signals, such as voltage and current signals, of each MLPE device. The device can be various processors and data collectors in the prior art, and a PLC type collector or an embedded type collector can be applied. The number of analyzers can be only one set, analysis and comparison can be carried out, and MLPE equipment with abnormal states can be found out. The bypass device can be an electromagnetic relay in the prior art, is connected in parallel with two ends of each MLPE device, is also connected with the analyzer, receives an instruction of the analyzer, is closed in time when the state of one MLPE device is abnormal, and short-circuits the MLPE device, so that the other normal MLPE devices can be ensured to continue to perform the aging test without interruption, and the working efficiency is improved.

The MLPE ageing device only needs one power supply and one load, and a plurality of tested MLPE devices only consume the power of the devices, so that the energy is saved, and the ageing efficiency is improved.

Preferably, the MLPE device comprises a monitoring shutoff device for shutting off output voltage and data acquisition communication, and the analyzer comprises a controller, wherein the controller is connected with each monitoring shutoff device and used for acquiring voltage and current data in each monitoring shutoff device.

The monitor shutoff is a core in MLPE devices. Because under normal photovoltaic power generation state, the output voltage of serial circuit exceeds 200V generally, once the roof of installation photovoltaic module fires, the high voltage of photovoltaic group cluster will put out a fire and rescue and cause safety hazard for firefighter, and the control turn-off ware can be with higher voltage quick fall below 30V. Meanwhile, the monitoring shutoff device can also monitor voltage and current signals in the circuit in real time, and the controller can collect signal data through a PLC data collector in the prior art, for example, the data can be collected once every 5 seconds in the aging process and summarized for subsequent monitoring and comparison.

Preferably, the analyzer comprises a master controller, wherein the master controller is connected to two ends of each MLPE equipment and is used for collecting voltage and current data of two ends of each MLPE equipment; the main controller is connected with the controller and receives data transmitted by the controller.

The main controller is directly connected with two ends of each MLPE equipment, and acquires voltage and current data of the whole periphery of MLPE equipment; it may employ a generic 485 gateway collector in the prior art. Meanwhile, the main controller also generates data communication with the controller, receives data information from the controller, and integrates the two groups of information.

Preferably, the MLPE burn-in device further comprises an upper computer connected with the master controller for processing data transmitted from the master controller.

The upper computer is used as an upper layer judging and interacting system of the whole MLPE ageing device, and can adopt PC equipment which is electrically connected with the main controller. After the main controller sends the two groups of data to the upper computer, the upper computer compares, analyzes and displays the information by running specific software. By comparing, for example, the voltage difference value in two sets of data corresponding to a certain tested MLPE device is abnormal, it can be known that the tested MLPE device has a fault. The upper computer 4 can also record the running time in real time, and after the fault equipment is detected through comparison, the time and the fault equipment information are integrated and recorded to be used as a group of result data of the aging test.

Preferably, the upper computer is connected with each bypass device, and the bypass device receives a control signal of the upper computer and automatically performs a short-circuit operation on the corresponding MLPE devices.

The bypass device is connected with the upper computer, receives the upper computer signal, and sends an instruction to the bypass device after the upper computer confirms the fault equipment after data comparison. The bypass device can use an electromagnetic relay in the prior art, and when the bypass device receives a fault signal, the bypass device acts to enter a passage state. Because it connects in parallel at the both ends of trouble MLPE equipment, so can play the effect of short circuit this equipment, other normal operating MLPE equipment in the whole serial circuit is not influenced this moment, continues the ageing test for the test procedure need not interrupt, has improved efficiency.

Preferably, the MLPE burn-in device further comprises an indicator light connected to the bypass.

Since the entire burn-in test will last a long time, no staff is constantly left to watch. The circuit where the bypass device is arranged is provided with the indicator lamp, and when a certain bypass device is in a passage, the indicator lamp is continuously lightened, and the reminding effect is achieved when the next worker patrols and examines. The convenience of work is enhanced.

Preferably, the analyzer further comprises a code scanner which is connected with the upper computer and automatically scans the product codes on the MLPE equipment.

After all tested MLPE devices are connected in series, identity binding work needs to be carried out on each MLPE device, and a product code is printed on the surface of each MLPE device, wherein the product code comprises information such as model information, production date, serial number and the like. Before the aging test starts, the code scanner scans the product codes one by one, and is connected with the upper computer, so that the information can be uploaded to the upper computer, and the information is bound with the corresponding voltage and current test data, and when the fault is detected, the production batch and date of the fault product can be rapidly verified and referred.

Preferably, the analyzer further comprises a temperature measuring gun which is connected with the upper computer and continuously monitors the surface temperature of the MLPE equipment.

The MLPE equipment may have abnormal temperature variations due to test circuit faults, environmental temperature variations, and other factors. And abnormal temperatures may affect the burn-in test results, and extremely high temperatures may even cause hazards. The temperature of the surface of MLPE equipment can be uploaded to the upper computer by arranging the temperature measuring gun connected with the upper computer, so that the aging test obtains test reference data with more dimensions; and when abnormal high temperature is detected, the upper computer can automatically adjust the power supply or the bypass device so as to ensure the safety of the test process. So that the stability of the MLPE ageing device is greatly enhanced.

In summary, the utility model has the following beneficial effects:

1. The aging test is carried out by connecting a plurality of tested MLPE devices in series, so that the use of a power supply and load devices can be saved, the requirements can be met by one power supply and one load, the test efficiency is improved, and meanwhile, the energy is saved.

2. The main controller and the controller are used for respectively collecting data at two ends of the tested MLPE equipment and two ends of the monitoring shutoff device, comparing and continuously monitoring the data by means of the upper computer, and finding out the abnormality of the voltage parameter in the aging test, so as to judge the working state of the tested equipment, make adjustment in time and end the aging test process.

3. Bypass devices are arranged at two ends of each tested MLPE device, so that the abnormal tested MLPE device in the testing process can be timely short-circuited, and the normal testing state of other MLPE devices is ensured.

Drawings

Fig. 1 is a schematic connection diagram of the MLPE burn-in apparatus.

In the figure: 1. MLPE equipment, 11, a monitoring shutoff device, 2, an aging detector, 21, a power supply, 22, a load, 23, an analyzer, 231, a controller, 232, a master controller, 233, a code scanner, 234, a temperature measuring gun, 3, a bypass device, 4, an upper computer, 5 and an indicator lamp.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

As shown in fig. 1, in this embodiment, 3 MLPE devices 1 are simultaneously subjected to the synchronous burn-in test. Each MLPE of the devices 1 are connected in series to form a serial group, one end of the serial group is connected with a power supply 21, the power supply 21 is a bidirectional power supply, the power supply can convert alternating current into direct current, and the direct current is supplied to all tested MLPE devices 1 so as to simulate the direct current generated when the photovoltaic module works normally; and a load 22 is connected to one end of the string, and the load 22 is a grid-connected inverter and is used for converting direct-current electric energy into alternating-current electric energy and re-networking so as to reduce energy waste.

The monitoring shutoff device 11 is located inside the MLPE device 1, and has the capability of constantly acquiring and monitoring the output voltage of the whole MLPE device 1, and the controller 231 is connected with the monitoring shutoff device and generates communication to acquire the voltage information recorded on the monitoring shutoff device 11 every 5 seconds. The controller 231 can be realized by adopting a PLC collector and a data transmitter, and simultaneously collects the voltage information on all the monitoring turnoff devices 11 connected with the PLC collector.

The main controller 232 in the analyzer 23 is directly connected with two ends of each MLPE device 1, and collects MLPE voltage data of the whole device 1; the method can be realized by adopting a universal 485 gateway collector matched with a voltage detector in the prior art. Meanwhile, the master 232 is also in data communication with the controller 231, receives the voltage data information from the controller 231, and integrates the two sets of information. The main controller 232 is connected with the upper computer 4, after two sets of voltage information are acquired, the information is sent to the upper computer 4, the upper computer 4 uses its own calculation processor and specific analysis software to analyze and compare the data, if the comparison result has a large difference, it is indicated that the voltage information recorded on the monitoring shutoff device 11 acquired by the controller 231 is abnormal, and the working state of the MLPE equipment 1 is abnormal and needs to be processed. For example, the output voltage of the power supply 21 is 60V, the voltage loaded on the first tested MLPE device 1 located at the first position of the serial group is 60V, if the voltage information collected by the main controller 232 is 60V, the voltage information obtained by the communication between the controller 231 and the monitoring shutoff device 11 is 60v±1v, so that the first tested MLPE device 1 can be proved to be in a normal working state; if the voltage information obtained by the controller 231 communicating with the monitoring switch 11 has a large deviation from 60V, it can be proved that the first detected MLPE device 1 is in an abnormal operation state.

And the two ends of each tested MLPE device 1 are provided with a bypass device 3, the bypass devices 3 are connected with the upper computer 4, control commands of the upper computer are received, and after the upper computer 4 finds out the MLPE device 1 with the abnormality through analysis and comparison, a short circuit instruction is automatically sent to the bypass devices 3. The bypass device 3 can be an electromagnetic relay in the prior art, and is automatically closed after receiving a signal, so that MLPE equipment 1 connected with the bypass device in parallel is short-circuited, and the aging test process of other normal MLPE equipment 1 is not affected. In addition, an indicator lamp 5 is further arranged, when the electromagnetic relay acts and then the MLPE equipment 1 connected with the electromagnetic relay in parallel is short-circuited, the indicator lamp 5 is turned on, a worker is reminded to process the electromagnetic relay in time, and the state of the electromagnetic relay is recovered.

Before the aging test starts, the code scanner 233 scans the product codes one by one, the code scanner 233 is connected with the upper computer 4, information can be uploaded to the upper computer 4 and bound with corresponding test data, and when faults are detected, production batches and dates of the faulty products can be rapidly verified and referred to.

In the aging test process, the temperature measuring gun 234 connected with the upper computer 4 continuously measures the surface temperature of each MLPE device 1, and if abnormal high temperature is detected and the numerical value exceeds a set threshold value, a command is automatically sent to the electromagnetic relay to enable the electromagnetic relay to play a bypass function, short-circuit MLPE devices 1 connected with the electromagnetic relay in parallel, and the safety of the whole device is protected.

The whole device can continuously and automatically perform aging test on a plurality of MLPE devices 1, the stability of the long-time working device is guaranteed through the bypass device 3, the detection efficiency is high, and the electric energy consumption is saved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A MLPE ageing device comprising MLPE devices (1) and an ageing detector (2), wherein the ageing detector (2) comprises a power supply (21) and a load (22), and is characterized in that a plurality of MLPE devices (1) are connected in series, the ageing detector (2) further comprises an analyzer (23) connected with each MLPE device (1) and used for acquiring voltage and current data of the MLPE devices (1), and a bypass (3) is connected at two ends of each MLPE device (1) and connected with the analyzer (23), and the bypass (3) is further connected with the MLPE devices (1) with abnormal short circuits.

2. A MLPE burn-in apparatus according to claim 1, wherein the MLPE device (1) includes a monitor shutdown (11) for shutting down output voltage and data acquisition communications, the analyzer (23) including a controller (231), the controller (231) being connected to each of the monitor shutdown (11) for acquiring voltage current data in each of the monitor shutdown (11).

3. A MLPE burn-in apparatus as claimed in claim 2, wherein said analyser (23) comprises a master controller (232), said master controller (232) being connected across each of said MLPE devices (1) for collecting voltage and current data across each of said MLPE devices (1); the master controller (232) is connected with the controller (231) and receives data transmitted from the controller (231).

4. A MLPE burn-in apparatus according to claim 3, wherein the MLPE burn-in apparatus further comprises a host computer (4) coupled to the master (232) for processing data transmitted from the master (232).

5. The MLPE burn-in apparatus according to claim 4, wherein the host computer (4) is connected to each of the bypasses (3), and the bypasses (3) receive control signals from the host computer (4) and automatically perform a short-circuit operation on the corresponding MLPE device (1).

6. A MLPE ageing device according to claim 5, characterised in that the MLPE ageing device further comprises an indicator light (5) connected to the bypass (3).

7. The MLPE burn-in apparatus as claimed in claim 4, wherein said analyzer (23) further comprises a scanner (233) connected to said host computer (4) and automatically scanning the product code on said MLPE device (1).

8. The MLPE burn-in apparatus as defined in claim 4, wherein said analyzer (23) further comprises a temperature gun (234) connected to said host computer (4) and continuously monitoring the surface temperature of said MLPE device (1).