CN103472329A - Voltage exceptional response testing system of photovoltaic grid-connected inverter - Google Patents
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Abstract
本发明涉及一种光伏并网逆变器电压异常响应测试系统，该系统包括与工控机连接的仿真直流电源、与工控机连接的模拟交流电源、与工控机连接的模拟负载、与工控机连接的模拟A阻抗及模拟B阻抗、所述模拟A阻抗与模拟B阻抗串接的中间接点与模拟负载连接，在仿真交流电源与模拟A阻抗之间连接有被测逆变器，模拟直流电源与模拟B阻抗连接，被测逆变器输出侧、模拟交流电源输出侧、模拟负载的输入侧均与数据记录仪连接。本发明可以用于容量等级相近的不同逆变器的测试，降低了光伏并网逆变器电压异常响应测试难度，减少了不必要的电能消耗，提高了系统测试的安全性及测试结果的可靠性。
The invention relates to a voltage abnormal response test system of a photovoltaic grid-connected inverter. The system includes a simulated DC power supply connected to an industrial computer, a simulated AC power supply connected to the industrial computer, a simulated load connected to the industrial computer, and a simulated load connected to the industrial computer. The simulated A impedance and the simulated B impedance, the intermediate contact of the simulated A impedance and the simulated B impedance connected in series are connected to the simulated load, the tested inverter is connected between the simulated AC power supply and the simulated A impedance, and the simulated DC power supply and Analog B impedance connection, the output side of the tested inverter, the output side of the simulated AC power supply, and the input side of the simulated load are all connected to the data recorder. The present invention can be used for testing different inverters with similar capacity levels, reduces the difficulty of testing abnormal voltage response of photovoltaic grid-connected inverters, reduces unnecessary power consumption, and improves the safety of system testing and the reliability of test results sex.
Description
技术领域technical field
本发明属于光伏并网逆变器并网安全性试验技术领域，尤其是一种光伏并网逆变器电压异常响应测试系统。The invention belongs to the technical field of grid-connected safety tests of photovoltaic grid-connected inverters, in particular to a voltage abnormal response test system of photovoltaic grid-connected inverters.
背景技术Background technique
光伏并网逆变器是光伏发电系统中的核心部件，其性能直接影响整个系统的性能，并将对公共电网产生重要影响。为保证公用电网和用户的安全，光伏并网系统应具备完善的保护措施，针对可能出现的各种故障，要求光伏并网系统应在规定的时间内脱离电网，因此保护功能的测试非常重要。The photovoltaic grid-connected inverter is the core component of the photovoltaic power generation system, and its performance directly affects the performance of the entire system, and will have an important impact on the public power grid. In order to ensure the safety of the public grid and users, the photovoltaic grid-connected system should have comprehensive protection measures. For various possible faults, it is required that the photovoltaic grid-connected system should be disconnected from the grid within a specified time, so the test of the protection function is very important.
电压异常响应特性测试是光伏并网逆变器保护功能的一个基本测试项，现有测试标准中只给出了保护功能动作时间的限值，并没有给出具体的测试方法及要求。此外，传统的光伏并网逆变器试验需要手动进行系统中各设备的设置，操作复杂，并且存在由误操作引起的测试误差，测试结论可靠性差。The test of abnormal voltage response characteristics is a basic test item for the protection function of photovoltaic grid-connected inverters. The existing test standards only give the limit value of the protection function action time, and do not give specific test methods and requirements. In addition, the traditional photovoltaic grid-connected inverter test requires manual setting of each device in the system, the operation is complicated, and there are test errors caused by misoperation, and the reliability of the test conclusion is poor.
发明内容Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种光伏并网逆变器电压异常响应测试系统。The purpose of the present invention is to overcome the deficiencies of the prior art and provide a photovoltaic grid-connected inverter voltage abnormal response testing system.
本发明解决其技术问题是采取以下技术方案实现的：The present invention solves its technical problem and realizes by taking the following technical solutions:
一种光伏并网逆变器电压异常响应测试系统，该系统包括有用于模拟光伏阵列与工控机连接的仿真直流电源、用于模拟电网状态与工控机连接的模拟交流电源、与工控机连接的模拟负载、与工控机连接的模拟A阻抗、与工控机连接的模拟B阻抗、所述模拟A阻抗与模拟B阻抗分别用来模拟直流电源侧和交流电源侧至模拟负载的线路阻抗，模拟A阻抗与模拟B阻抗串接的中间接点与模拟负载连接，在仿真交流电源与模拟A阻抗之间连接有被测逆变器，模拟直流电源与模拟B阻抗连接，被测逆变器输出侧、模拟交流电源输出侧、模拟负载的输入侧均与数据记录仪连接，记录电网突变过程及并网逆变器动作过程的电压电流波形。A photovoltaic grid-connected inverter voltage abnormal response test system, the system includes a simulated DC power supply for simulating the connection between the photovoltaic array and the industrial computer, an simulated AC power supply for simulating the state of the power grid connected to the industrial computer, and a simulated AC power supply connected to the industrial computer. The simulated load, the simulated A impedance connected to the industrial computer, the simulated B impedance connected to the industrial computer, the simulated A impedance and the simulated B impedance are used to simulate the line impedance from the DC power supply side and the AC power supply side to the simulated load respectively, and the simulated A The intermediate point where the impedance is connected in series with the simulated B impedance is connected to the simulated load, the tested inverter is connected between the simulated AC power supply and the simulated A impedance, the simulated DC power supply is connected to the simulated B impedance, the output side of the tested inverter, Both the output side of the simulated AC power supply and the input side of the simulated load are connected to the data recorder to record the voltage and current waveforms during the sudden change process of the power grid and the action process of the grid-connected inverter.
而且，所述仿真直流电源通过RS232接口与工控机连接，所述模拟交流电源通过GPIB与工控机连接，所述模拟负载通过RS232接口与工控机连接，所述模拟A阻抗与模拟B阻抗均通过I/O板卡与工控机连接。Moreover, the simulated DC power supply is connected to the industrial computer through the RS232 interface, the simulated AC power supply is connected to the industrial computer through the GPIB, the simulated load is connected to the industrial computer through the RS232 interface, and the simulated A impedance and the simulated B impedance are both connected through The I/O board is connected with the industrial computer.
而且，所述仿真直流电源输出侧与被测逆变器输入侧、被测逆变器输出侧与模拟A阻抗、模拟A阻抗与模拟B阻抗、模拟B阻抗与模拟交流电源输出侧、模拟负载与模拟A阻抗与模拟B阻抗中间接点均通过电缆线路连接。Moreover, the output side of the simulated DC power supply and the input side of the tested inverter, the output side of the tested inverter and the simulated A impedance, the simulated A impedance and the simulated B impedance, the simulated B impedance and the simulated AC power output side, and the simulated load The intermediate points of the simulated A impedance and the simulated B impedance are all connected by cables.
而且，所述数据记录仪通过电压钳、电流钳分别连接至被测逆变器输出侧、模拟负载输入侧和模拟交流电源输出侧开关处。Moreover, the data recorder is respectively connected to the output side of the tested inverter, the input side of the simulated load and the switch of the output side of the simulated AC power supply through a voltage clamp and a current clamp.
而且，所述仿真直流电源具体选用型号是regatronTC.P.32,通过组态王软件6.55编写程序代码，在工控机操作界面通过RS232接口远程操作仿真直流电源。Moreover, the specific model of the simulated DC power supply is regatronTC.P.32, and the program code is written through the KingView software 6.55, and the simulated DC power supply is remotely operated through the RS232 interface on the operation interface of the industrial computer.
而且，所述模拟交流电源具体选用太平洋AMX-360，通过组态王软件6.55编写程序代码，在工控机操作界面通过GPIB接口远程操作模拟交流电源。Moreover, the analog AC power supply specifically selects Pacific AMX-360, writes the program code through Kingview software 6.55, and remotely operates the analog AC power supply through the GPIB interface on the operation interface of the industrial computer.
而且，所述模拟负载具体选用型号是群菱ACLT-3820H,通过组态王软件6.55编写程序代码，在工控机操作界面通过RS232接口远程操作模拟负载。Moreover, the specific model of the simulated load is Qunling ACLT-3820H, and the program code is written through KingView software 6.55, and the simulated load is remotely operated through the RS232 interface on the operation interface of the industrial computer.
而且，所述模拟A阻抗与模拟B阻抗采用凯翔微网阻抗一体式负载柜。Moreover, the simulated A impedance and simulated B impedance adopt Kaixiang Microgrid impedance integrated load cabinet.
而且，在工控机操作系统下，通过在组态王软件6.55编写程序代码，设定好操作指令步骤及仿真直流电源、仿真交流电源、模拟负载、数据记录仪的试验值和开启顺序，通过组态王的画面循环功能，工控机每隔0.5s向待操作设备发送一条指令，通过远程操作功能，实现自动测试。本发明的优点和积极效果是：Moreover, under the operating system of the industrial computer, by writing the program code in the Kingview software 6.55, setting the operation instruction steps and the simulated DC power supply, simulated AC power supply, simulated load, test value and start sequence of the data recorder, through the group With the screen cycle function of State King, the industrial computer sends an instruction to the device to be operated every 0.5s, and realizes automatic testing through the remote operation function. Advantage and positive effect of the present invention are:
1、本发明为光伏并网逆变器电压异常响应测试的实施提供了可靠的支撑；1. The present invention provides reliable support for the implementation of the abnormal voltage response test of photovoltaic grid-connected inverters;
2、本发明降低了测试难度，提高了系统测试的安全性及测试结果的可靠性；2. The present invention reduces the difficulty of testing, improves the safety of system testing and the reliability of test results;
3、本发明可以用于容量等级相近的不同逆变器的测试，提高了测试系统的可扩展性；3. The present invention can be used to test different inverters with similar capacity levels, which improves the scalability of the test system;
4、本发明测试过程按规定的步骤进行，减少了不必要的电能消耗，降低了测试成本。4. The test process of the present invention is carried out according to the prescribed steps, which reduces unnecessary power consumption and test cost.
附图说明Description of drawings
图1是本发明系统的结构图。Fig. 1 is a structural diagram of the system of the present invention.
具体实施方式Detailed ways
以下结合附图对本发明实施例做进一步详述，需要强调的是，以下实施方式是说明性的，而不是限定性的，不能以此实施方式作为对本发明的限定。The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings. It should be emphasized that the following embodiments are illustrative, not restrictive, and should not be used as limitations of the present invention.
一种光伏并网逆变器电压异常响应测试系统，如图1所示，该模拟系统包括有用于模拟光伏阵列与工控机连接的仿真直流电源、用于模拟电网状态与工控机连接的模拟交流电源、与工控机连接的模拟负载、与工控机连接的模拟A阻抗、与工控机连接的模拟B阻抗、所述模拟A阻抗与模拟B阻抗分别用来模拟直流电源侧和交流电源侧至模拟负载的线路阻抗，模拟A阻抗与模拟B阻抗串接的中间接点与模拟负载连接，被测逆变器输出侧、模拟交流电源输出侧、模拟负载的输入侧均与数据记录仪连接，记录电网突变过程及并网逆变器动作过程的电压电流波形，在仿真交流电源与模拟A阻抗之间连接有被测逆变器，模拟直流电源与模拟B阻抗连接。A photovoltaic grid-connected inverter voltage abnormal response test system, as shown in Figure 1, the simulation system includes a simulated DC power supply for simulating the connection between the photovoltaic array and the industrial computer, and a simulated AC power supply for simulating the connection between the grid state and the industrial computer. The power supply, the simulated load connected to the industrial computer, the simulated A impedance connected to the industrial computer, the simulated B impedance connected to the industrial computer, the simulated A impedance and the simulated B impedance are respectively used to simulate the DC power supply side and the AC power supply side to simulate The line impedance of the load, the intermediate point where the simulated A impedance and the simulated B impedance are connected in series are connected to the simulated load, the output side of the tested inverter, the output side of the simulated AC power supply, and the input side of the simulated load are all connected to the data recorder to record the power grid The voltage and current waveforms of the sudden change process and the action process of the grid-connected inverter, the tested inverter is connected between the simulated AC power supply and the simulated A impedance, and the simulated DC power supply is connected with the simulated B impedance.
在本发明的具体实施中，所述仿真直流电源通过RS232接口与工控机连接，所述模拟交流电源通过GPIB与工控机连接，所述模拟负载通过RS232接口与工控机连接，所述模拟A阻抗与模拟B阻抗均通过I/O板卡与工控机连接。In the specific implementation of the present invention, the simulated DC power supply is connected to the industrial computer through the RS232 interface, the simulated AC power supply is connected to the industrial computer through the GPIB, the simulated load is connected to the industrial computer through the RS232 interface, and the simulated A impedance Both the analog B impedance and the industrial computer are connected through the I/O board.
在本发明的具体实施中，所述仿真直流电源输出侧与被测逆变器输入侧、被测逆变器输出侧与模拟A阻抗、模拟A阻抗与模拟B阻抗、模拟B阻抗与模拟交流电源输出侧、模拟负载与模拟A阻抗与模拟B阻抗中间接点均通过电缆线路连接。In the specific implementation of the present invention, the output side of the simulated DC power supply and the input side of the inverter under test, the output side of the inverter under test and the simulated A impedance, the simulated A impedance and the simulated B impedance, the simulated B impedance and the simulated AC The output side of the power supply, the simulated load, and the intermediate points of the simulated A impedance and the simulated B impedance are all connected by cables.
在本发明的具体实施中，所述数据记录仪通过电压钳、电流钳分别连接至被测逆变器输出侧、模拟负载输入侧和模拟交流电源输出侧开关处，记录系统侧电压异常时每点处电压、电流响应。In the specific implementation of the present invention, the data recorder is respectively connected to the output side of the inverter under test, the input side of the simulated load and the switch of the output side of the simulated AC power supply through a voltage clamp and a current clamp, and records every time when the voltage on the system side is abnormal. The voltage and current response at the point.
在本发明的具体实施中，所述模拟系统通过组态王软件6.55编写程序代码，结合设备的通信协议实现系统内各设备之间的通信连接，完成工控机与各连接设备间的数据交换，从而实现设备的远程控制。In the specific implementation of the present invention, described simulation system writes program code through Kingview software 6.55, realizes the communication connection between each equipment in the system in conjunction with the communication protocol of equipment, completes the data exchange between industrial computer and each connected equipment, Thus realizing the remote control of the equipment.
在本发明的具体实施中，所述仿真直流电源具体选用型号是regatronTC.P.32,通过组态王软件6.55编写程序代码，在工控机操作界面通过RS232接口远程操作仿真直流电源，可远程实现如下功能的操作：设定仿真电源输出电压、电流值，调节和读取功率和电阻预设值、设定输出电压上限、设定输出电流上限、调用输出曲线、远程控制输出的开始和停止、读取故障和报警信息、清除故障和报警信息、读取仿真电源的输出状态、读取实际输出电压、电流、功率和电阻值及读取曲线调用结果。In the specific implementation of the present invention, the emulated DC power supply is specifically selected as regatronTC.P.32, and the program code is written through the Kingview software 6.55, and the emulated DC power supply is remotely operated through the RS232 interface on the operation interface of the industrial computer, which can be realized remotely. Operation of the following functions: set the output voltage and current value of the simulation power supply, adjust and read the preset value of power and resistance, set the upper limit of the output voltage, set the upper limit of the output current, call the output curve, start and stop the remote control output, Read fault and alarm information, clear fault and alarm information, read the output status of the simulated power supply, read the actual output voltage, current, power and resistance values, and read the results of curve calling.
在本发明的具体实施中，所述模拟交流电源具体选用太平洋AMX-360通过组态王软件6.55编写程序代码，在工控机操作界面通过GPIB接口远程操作模拟交流电源，可远程实现如下功能的操作：设定和读取仿真电源输出相数、调节输出电压值、读取输出电压有效值、调节输出频率、读取输出频率、调节输出相角大小、读取有功功率、视在功率和功率因数、调用已设定完成的暂态程序、复制暂态程序、删除和输出暂态程序、读取输出线电压。In the specific implementation of the present invention, the analog AC power supply specifically selects Pacific AMX-360 to write the program code through Kingview software 6.55, and remotely operates the analog AC power supply through the GPIB interface on the operation interface of the industrial computer, and can remotely realize the operation of the following functions : Set and read the number of output phases of the simulated power supply, adjust the output voltage value, read the effective value of the output voltage, adjust the output frequency, read the output frequency, adjust the output phase angle, read active power, apparent power and power factor , Call the already set transient program, copy the transient program, delete and output the transient program, read the output line voltage.
在本发明的具体实施中，所述模拟负载具体选用型号是群菱ACLT-3820H,通过组态王软件6.55编写程序代码，在工控机操作界面通过RS232接口远程操作模拟负载,可远程实现如下功能的操作：独立加载和卸载电阻、电感、电容三种负载、远程控制风机启动和停止、读取电量及报警信息。In the specific implementation of the present invention, the specific selected model of the simulated load is Qunling ACLT-3820H, and the program code is written through KingView software 6.55, and the simulated load is operated remotely through the RS232 interface on the operation interface of the industrial computer, and the following functions can be realized remotely Operation: independent loading and unloading of resistance, inductance, and capacitance three loads, remote control of fan start and stop, reading power and alarm information.
在本发明的具体实施中，所述模拟A阻抗与模拟B阻抗采用凯翔微网阻抗一体式负载柜，分别用来模拟直流电源侧和交流电源侧至模拟负载的线路阻抗大小。在本发明的具体实施中，在工控机操作系统下，通过在组态王软件6.55编写程序代码，设定好操作指令步骤及仿真直流电源、仿真交流电源、模拟负载、数据记录仪的试验值和开启顺序，通过组态王的画面循环功能，工控机每隔0.5s向待操作设备发送一条指令，通过以上所述远程操作功能，实现自动测试。In the specific implementation of the present invention, the simulated A impedance and the simulated B impedance adopt Kaixiang micro-grid impedance integrated load cabinet, which are respectively used to simulate the line impedance from the DC power supply side and the AC power supply side to the simulated load. In the specific implementation of the present invention, under the industrial computer operating system, by writing the program code in the Kingview software 6.55, set the test value of the operation instruction steps and the simulated DC power supply, the simulated AC power supply, the simulated load, and the data recorder And the opening sequence, through the screen cycle function of KingView, the industrial computer sends an instruction to the device to be operated every 0.5s, and realizes the automatic test through the above-mentioned remote operation function.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105021916A (en) * | 2015-04-17 | 2015-11-04 | 国家电网公司 | Analysis and processing method for three-phase voltage abnormity of regional power grid 35 kV system |
| CN105652117A (en) * | 2015-12-29 | 2016-06-08 | 国网智能电网研究院 | DC power grid full-power circulating testing circuit based on DC/DC converter |
| CN105652117B (en) * | 2015-12-29 | 2020-10-27 | 国网智能电网研究院 | DC/DC converter-based full-power-cycle test circuit for DC power grid |
| CN114295914A (en) * | 2021-12-30 | 2022-04-08 | 深圳市首航新能源股份有限公司 | Test verification method and test verification platform for grid-connected electronic equipment |
| CN114705935A (en) * | 2022-03-29 | 2022-07-05 | 深圳市首航新能源股份有限公司 | Testing method and testing platform for grid-connected electronic equipment |
| CN115453253A (en) * | 2022-11-09 | 2022-12-09 | 深圳市鼎泰佳创科技有限公司 | Light stores up dc-to-ac converter aging testing system |
| CN115453253B (en) * | 2022-11-09 | 2023-02-10 | 深圳市鼎泰佳创科技有限公司 | Light stores up dc-to-ac converter aging testing system |
| CN115808582A (en) * | 2022-11-21 | 2023-03-17 | 深圳市索源科技有限公司 | An inverter load detection circuit |
| CN115808582B (en) * | 2022-11-21 | 2023-12-26 | 深圳市索源科技有限公司 | Inverter load detection circuit |
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Application publication date: 20131225 |