CN205786889U - Dynamic passive compensation response wave shape acquisition system - Google Patents
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Abstract
本实用新型公开了一种动态无功补偿响应波形采集系统，解决了现有技术存在的对动态无功补偿装置的响应时间的测试的第一手采样信息失真的问题。包括主变高、低压母线、集电线路、动态无功补偿装置电流互感器（7），在主变高压母线上设置有主变高压侧电压互感器（1），在主变低压母线上分别设置有主变低压侧电压互感器（2）和动态无功补偿装置电流互感器（7），集电线路依次通过断路器和集电线路电流互感器与主变高、低压母线电连接，在动态无功补偿装置电流互感器（7）的二次侧上连接有动态无功补偿装置（6），本实用新型通过测量动态无功补偿装置的三相输出电压和电流，从而测得其瞬时无功输出。特别适合在电网现场使用。
The utility model discloses a dynamic reactive power compensation response waveform acquisition system, which solves the problem in the prior art that the first-hand sampling information is distorted in the test of the response time of the dynamic reactive power compensation device. Including main transformer high-voltage and low-voltage busbars, current collector lines, dynamic reactive power compensation device current transformers (7), main transformer high-voltage side voltage transformers (1) are installed on the main transformer high-voltage busbars, and main transformer low-voltage busbars are respectively The voltage transformer (2) on the low-voltage side of the main transformer and the current transformer (7) of the dynamic reactive power compensation device are installed. A dynamic reactive power compensation device (6) is connected to the secondary side of the current transformer (7) of the dynamic reactive power compensation device. The utility model measures the three-phase output voltage and current of the dynamic reactive power compensation device to measure its instantaneous Reactive output. Especially suitable for use on the grid site.
Description
技术领域 technical field
本发明涉及一种动态无功补偿响应波形采集系统，特别涉及一种在电网中所接入的动态无功补偿装置对扰动源的响应波形的检测装置及检测方法。 The invention relates to a dynamic reactive power compensation response waveform acquisition system, in particular to a detection device and detection method for the response waveform of a dynamic reactive power compensation device connected to a power grid to a disturbance source.
背景技术 Background technique
随着风电场大规模接入电网后大批的电力电子装置的应用，运行电网出现了一些新的问题。特别是风力发电机大规模脱网，会对电网造成严重冲击。为了保障电网系统的安全稳定运行，对风电场动态无功补偿装置的响应时间提出了新的苛刻要求。根据有关规定，风电场动态无功补偿装置的响应时间应在30毫秒以内，为了满足要求，需要对运行电网的动态无功补偿装置的响应时间进行测试，对现场安装的风电场动态无功补偿装置进行评价。现有的测试方法，仅仅是对三相电中的某一相进行扰动测试，依据单项的电流变化来估算动态无功补偿装置整体无功输出状。当动态无功补偿装置三相输出不平衡时，响应波形和响应时间的测试结果是与实际的三相无功波形及三相无功输出响应时间存在教大误差的，导致对动态无功补偿装置的响应时间测试的第一手采样信息失真。 With the application of a large number of power electronic devices after wind farms are connected to the grid on a large scale, some new problems have emerged in the operation of the grid. In particular, large-scale disconnection of wind turbines will have a serious impact on the power grid. In order to ensure the safe and stable operation of the power grid system, new stringent requirements are put forward for the response time of the wind farm dynamic reactive power compensation device. According to the relevant regulations, the response time of the dynamic reactive power compensation device in the wind farm should be within 30 milliseconds. In order to meet the requirements, it is necessary to test the response time of the dynamic reactive power compensation device in the operating grid. The device is evaluated. The existing test method is only to perform a disturbance test on a certain phase of the three-phase electricity, and estimate the overall reactive power output status of the dynamic reactive power compensation device based on the current change of a single item. When the three-phase output of the dynamic reactive power compensation device is unbalanced, the test results of the response waveform and response time have a large error with the actual three-phase reactive power waveform and the response time of the three-phase reactive power output, resulting in a large error for the dynamic reactive power compensation First-hand sampling of device response time tests is distorted.
发明内容 Contents of the invention
本发明提供了一种动态无功补偿响应波形采集系统，解决了现有技术存在的对动态无功补偿装置的响应时间的测试的第一手采样信息失真的问题。 The invention provides a dynamic reactive power compensation response waveform acquisition system, which solves the problem of distortion of the first-hand sampling information in the test of the response time of the dynamic reactive power compensation device in the prior art.
本发明是通过以下技术方案解决以上技术问题的： The present invention solves the above technical problems through the following technical solutions:
一种动态无功补偿响应波形采集系统，包括主变高压母线、主变低压母线、负荷最大的第一集电线路、正常运行的第二集电线路、动态无功补偿装置电流互感器和录波仪，在主变高压母线上设置有主变高压侧电压互感器，在主变低压母线上分别设置有主变低压侧电压互感器和动态无功补偿装置电流互感器，第一集电线路依次通过第一断路器和第一集电线路电流互感器与主变低压母线电连接在一起，第二集电线路依次通过第二断路器和第二集电线路电流互感器与主变低压母线电连接在一起，在动态无功补偿装置电流互感器的二次侧上连接有动态无功补偿装置，主变低压侧电压互感器的A相电压输出端与录波仪的第一电压信号采集端连接在一起，主变低压侧电压互感器的B相电压输出端与录波仪的第二电压信号采集端连接在一起，主变低压侧电压互感器的C相电压输出端与录波仪的第三电压信号采集端连接在一起，主变高压侧电压互感器的A相电压输出端与录波仪的第四电压信号采集端连接在一起；动态无功补偿装置电流互感器的A相电流输出端与录波仪的第一电流信号采集端连接在一起，动态无功补偿装置电流互感器的B相电流输出端与录波仪的第二电流信号采集端连接在一起，动态无功补偿装置电流互感器的C相电流输出端与录波仪的第三电流信号采集端连接在一起，第一集电线路电流互感器的A相电流输出端与录波仪的第四电流信号采集端连接在一起。 A dynamic reactive power compensation response waveform acquisition system, including the main transformer high-voltage bus, the main transformer low-voltage bus, the first collector line with the largest load, the second collector line in normal operation, the current transformer of the dynamic reactive power compensation device and the recorder. Wave instrument, the main transformer high-voltage side voltage transformer is installed on the main transformer high-voltage bus, and the main transformer low-voltage side voltage transformer and dynamic reactive power compensation device current transformer are respectively installed on the main transformer low-voltage bus. The first circuit breaker and the current transformer of the first collector line are electrically connected to the low-voltage bus of the main transformer in sequence, and the second collector circuit is connected to the low-voltage bus of the main transformer in turn through the second circuit breaker and the current transformer of the second collector line. Electrically connected together, the dynamic reactive power compensation device is connected to the secondary side of the current transformer of the dynamic reactive power compensation device, the A-phase voltage output terminal of the voltage transformer on the low-voltage side of the main transformer and the first voltage signal acquisition The terminals are connected together, the B-phase voltage output terminal of the main transformer low-voltage side voltage transformer is connected with the second voltage signal acquisition terminal of the oscilloscope, the C-phase voltage output terminal of the main transformer low-voltage side voltage transformer is connected with the oscilloscope The third voltage signal acquisition terminal of the main transformer high-voltage side voltage transformer is connected together, and the A-phase voltage output terminal of the voltage transformer on the high-voltage side of the main transformer is connected with the fourth voltage signal acquisition terminal of the wave recorder; the A-phase of the current transformer of the dynamic reactive power compensation device The current output terminal is connected with the first current signal acquisition terminal of the oscilloscope, and the B-phase current output terminal of the current transformer of the dynamic reactive power compensation device is connected with the second current signal acquisition terminal of the oscilloscope. The C-phase current output terminal of the current transformer of the compensation device is connected with the third current signal acquisition terminal of the oscilloscope, and the A-phase current output terminal of the current transformer of the first collector line is connected with the fourth current signal acquisition terminal of the oscilloscope. ends connected together.
在录波仪上连接有响应波形分析系统。 A response waveform analysis system is connected to the oscilloscope.
一种动态无功补偿响应波形采集方法，包括以下步骤： A dynamic reactive power compensation response waveform acquisition method, comprising the following steps:
第一步、选择负荷最大的集电线路作为第一集电线路，再选择其他正常运行的一个集电线路作为第二集电线路； The first step is to select the collector line with the largest load as the first collector line, and then select another collector line in normal operation as the second collector line;
第二步、将第一集电线路上的全部风机和负荷退出运行，用第一断路器将第一集电线路切断，从切断时开始计时30分钟，使第一集电线路上的各风机箱变放电完成； The second step is to withdraw all the fans and loads on the first power collection line from running, cut off the first power collection line with the first circuit breaker, and count 30 minutes from the time of cutting off, so that each fan box on the first power collection line becomes Discharge completed;
第三步、将主变低压侧电压互感器的A相电压输出端与录波仪的第一电压信号采集端连接在一起，主变低压侧电压互感器的B相电压输出端与录波仪的第二电压信号采集端连接在一起，主变低压侧电压互感器的C相电压输出端与录波仪的第三电压信号采集端连接在一起，主变高压侧电压互感器的A相电压输出端与录波仪的第四电压信号采集端连接在一起；动态无功补偿装置电流互感器的A相电流输出端与录波仪的第一电流信号采集端I1连接在一起，动态无功补偿装置电流互感器的B相电流输出端与录波仪的第二电流信号采集端连接在一起，动态无功补偿装置电流互感器的C相电流输出端与录波仪的第三电流信号采集端连接在一起，第一集电线路电流互感器的A相电流输出端与录波仪的第四电流信号采集端连接在一起； The third step is to connect the A-phase voltage output terminal of the voltage transformer on the low-voltage side of the main transformer with the first voltage signal acquisition terminal of the oscilloscope, and the B-phase voltage output terminal of the voltage transformer on the low-voltage side of the main transformer and the oscilloscope. The second voltage signal acquisition terminal of the main transformer low-voltage side voltage transformer is connected together, the C-phase voltage output terminal of the main transformer low-voltage side voltage transformer is connected with the third voltage signal acquisition terminal of the oscilloscope, and the A-phase voltage of the main transformer high-voltage side voltage transformer The output end is connected together with the fourth voltage signal acquisition end of the oscilloscope; the A-phase current output end of the current transformer of the dynamic reactive power compensation device is connected with the first current signal acquisition end I1 of the oscilloscope. The B-phase current output terminal of the current transformer of the power compensation device is connected with the second current signal acquisition terminal of the oscilloscope, and the C-phase current output terminal of the current transformer of the dynamic reactive power compensation device is connected with the third current signal of the oscilloscope. The acquisition ends are connected together, and the A-phase current output end of the current transformer of the first collector line is connected with the fourth current signal acquisition end of the oscilloscope;
第四步、根据第一集电线路上的电流，以录波仪的第四电流信号采集端电流波形输入为参考设置录波器为突变量触发录波，并设置录波时间为100毫秒，触发前录波时间为10毫秒； Step 4. According to the current on the first collector line, set the wave recorder as a sudden change trigger wave recording with the current waveform input of the fourth current signal acquisition terminal of the wave recorder as a reference, and set the wave recording time to 100 milliseconds, trigger The pre-recording time is 10 milliseconds;
第五步、将第一集电线路上的第一断路器合上，等待2-3分钟，完成录波采样过程； The fifth step, close the first circuit breaker on the first collection line, wait for 2-3 minutes, and complete the recording and sampling process;
第六步、将录波仪记录数据导入响应波形分析系统，利用记录的动态无功补偿装置三相输出电压和电流数据，基于瞬时无功计算理论，绘制出动态无功补偿装置的瞬时输出无功曲线； The sixth step is to import the recorded data of the wave recorder into the response waveform analysis system, use the recorded three-phase output voltage and current data of the dynamic reactive power compensation device, and draw the instantaneous output reactive power of the dynamic reactive power compensation device based on the theory of instantaneous reactive power calculation. power curve;
第七步、将主变高压侧A相电压曲线与动态无功补偿装置的瞬时输出无功曲线绘制在同一坐标轴内，以扰动电压达到动态无功发生装置动作门槛值作为响应起点，以动态无功发生装置输出至目标值最大值的90%作为终点，以此计算动态无功补偿装置的响应时间。 The seventh step is to draw the voltage curve of phase A on the high voltage side of the main transformer and the instantaneous output reactive power curve of the dynamic reactive power compensation device in the same coordinate axis, and take the disturbance voltage reaching the action threshold of the dynamic reactive power generator as the starting point of the response, and use the dynamic The output of the reactive power generating device reaches 90% of the maximum value of the target value as the end point, so as to calculate the response time of the dynamic reactive power compensation device.
本发明利用线路大容量箱变充电引起高压侧母线电压波动，模拟真实的系统无功扰动，通过单台录波仪实现了动态无功补偿装置的瞬时无功输出曲线与被控电压曲线的自然同步，最终给出了动态无功补偿装置全过程响应波形，测试准确可靠，特别适合在电网现场使用。 The invention utilizes the large-capacity box transformer charging of the line to cause the voltage fluctuation of the high-voltage side busbar, simulates the real system reactive power disturbance, and realizes the naturalness of the instantaneous reactive power output curve and the controlled voltage curve of the dynamic reactive power compensation device through a single wave recorder. Synchronously, the whole process response waveform of the dynamic reactive power compensation device is finally given, the test is accurate and reliable, and it is especially suitable for use in the power grid field.
附图说明 Description of drawings
图1是本发明的检测电路的结构示意图。 FIG. 1 is a schematic structural diagram of a detection circuit of the present invention.
具体实施方式 detailed description
下面结合附图对本发明进行详细说明： The present invention is described in detail below in conjunction with accompanying drawing:
一种动态无功补偿响应波形采集系统，包括主变高压母线、主变低压母线、负荷最大的第一集电线路3、正常运行的第二集电线路5、动态无功补偿装置电流互感器7和录波仪8，在主变高压母线上设置有主变高压侧电压互感器1，在主变低压母线上分别设置有主变低压侧电压互感器2和动态无功补偿装置电流互感器7，第一集电线路3依次通过第一断路器4和第一集电线路电流互感器10与主变低压母线电连接在一起，第二集电线路5依次通过第二断路器和第二集电线路电流互感器与主变低压母线电连接在一起，在动态无功补偿装置电流互感器7的二次侧上连接有动态无功补偿装置6，主变低压侧电压互感器2的A相电压输出端与录波仪8的第一电压信号采集端V1连接在一起，主变低压侧电压互感器2的B相电压输出端与录波仪8的第二电压信号采集端V2连接在一起，主变低压侧电压互感器2的C相电压输出端与录波仪8的第三电压信号采集端V3连接在一起，主变高压侧电压互感器1的A相电压输出端与录波仪8的第四电压信号采集端V4连接在一起；动态无功补偿装置电流互感器7的A相电流输出端与录波仪8的第一电流信号采集端I1连接在一起，动态无功补偿装置电流互感器7的B相电流输出端与录波仪8的第二电流信号采集端I2连接在一起，动态无功补偿装置电流互感器7的C相电流输出端与录波仪8的第三电流信号采集端I3连接在一起，第一集电线路电流互感器10的A相电流输出端与录波仪8的第四电流信号采集端I4连接在一起。 A dynamic reactive power compensation response waveform acquisition system, including a main transformer high-voltage bus, a main transformer low-voltage bus, the first current collector line 3 with the largest load, the second current collector line 5 in normal operation, and a dynamic reactive power compensation device current transformer 7 and wave recorder 8, the main transformer high-voltage side voltage transformer 1 is installed on the main transformer high-voltage bus, and the main transformer low-voltage side voltage transformer 2 and dynamic reactive power compensation device current transformer are respectively installed on the main transformer low-voltage bus 7. The first collector line 3 is electrically connected to the main transformer low-voltage bus through the first circuit breaker 4 and the first collector line current transformer 10 in turn, and the second collector line 5 is sequentially passed through the second circuit breaker and the second The current transformer of the collector line is electrically connected with the low-voltage busbar of the main transformer, and the dynamic reactive power compensation device 6 is connected to the secondary side of the current transformer 7 of the dynamic reactive power compensation device. The A of the voltage transformer 2 on the low-voltage side of the main transformer The phase voltage output terminal is connected with the first voltage signal acquisition terminal V1 of the oscilloscope 8, and the B-phase voltage output terminal of the main transformer low voltage side voltage transformer 2 is connected with the second voltage signal acquisition terminal V2 of the oscilloscope 8 . Connected together, the C-phase voltage output terminal of the voltage transformer 2 on the low-voltage side of the main transformer is connected with the third voltage signal acquisition terminal V3 of the wave recorder 8, and the A-phase voltage output terminal of the voltage transformer 1 on the high-voltage side of the main transformer It is connected together with the fourth voltage signal acquisition terminal V4 of the oscilloscope 8; the A-phase current output terminal of the dynamic reactive power compensation device current transformer 7 is connected together with the first current signal acquisition terminal I1 of the oscilloscope 8 , the B-phase current output terminal of the dynamic reactive power compensation device current transformer 7 is connected together with the second current signal acquisition terminal I 2 of the wave recorder 8, and the C-phase current output terminal of the dynamic reactive power compensation device current transformer 7 is connected with the The third current signal acquisition terminal I 3 of the oscilloscope 8 is connected together, and the A-phase current output terminal of the first collector line current transformer 10 is connected with the fourth current signal acquisition terminal I 4 of the oscilloscope 8 .
在录波仪8上连接有响应波形分析系统9。本发明通过测量动态无功补偿装置的三相输出电压和电流，从而测得其瞬时无功输出，解决了现有技术存在的单相测量导致动态无功补偿装置响应时间测试第一手采样信息的失真问题。 A response waveform analysis system 9 is connected to the oscilloscope 8 . The invention measures the three-phase output voltage and current of the dynamic reactive power compensation device, thereby measuring its instantaneous reactive power output, and solves the problem of single-phase measurement in the prior art that causes the first-hand sampling information of the response time test of the dynamic reactive power compensation device distortion problem.
一种动态无功补偿响应波形采集方法，包括以下步骤： A dynamic reactive power compensation response waveform acquisition method, comprising the following steps:
第一步、选择负荷最大的集电线路作为第一集电线路3，再选择其他正常运行的一个集电线路作为第二集电线路5； The first step, select the collector line with the largest load as the first collector circuit 3, and then select another collector circuit in normal operation as the second collector circuit 5;
第二步、将第一集电线路3上的全部风机和负荷退出运行，用第一断路器4将第一集电线路3切断，从切断时开始计时30分钟，使第一集电线路3上的各风机箱变放电完成； In the second step, all fans and loads on the first collector circuit 3 are withdrawn from operation, and the first collector circuit 3 is cut off with the first circuit breaker 4, and the time is counted for 30 minutes from the time of cutting, so that the first collector circuit 3 The transformation and discharge of each fan box on the board is completed;
第三步、将主变低压侧电压互感器2的A相电压输出端与录波仪8的第一电压信号采集端V1连接在一起，主变低压侧电压互感器2的B相电压输出端与录波仪8的第二电压信号采集端V2连接在一起，主变低压侧电压互感器2的C相电压输出端与录波仪8的第三电压信号采集端V3连接在一起，主变高压侧电压互感器1的A相电压输出端与录波仪8的第四电压信号采集端V4连接在一起；动态无功补偿装置电流互感器7的A相电流输出端与录波仪8的第一电流信号采集端I1连接在一起，动态无功补偿装置电流互感器7的B相电流输出端与录波仪8的第二电流信号采集端I2连接在一起，动态无功补偿装置电流互感器7的C相电流输出端与录波仪8的第三电流信号采集端I3连接在一起，第一集电线路电流互感器10的A相电流输出端与录波仪8的第四电流信号采集端I4连接在一起； The third step is to connect the A-phase voltage output terminal of the main transformer low-voltage side voltage transformer 2 with the first voltage signal acquisition terminal V1 of the wave recorder 8, and the B-phase voltage output of the main transformer low-voltage side voltage transformer 2 terminal is connected together with the second voltage signal acquisition terminal V2 of the oscilloscope 8, and the C-phase voltage output terminal of the main transformer low voltage side voltage transformer 2 is connected together with the third voltage signal acquisition terminal V3 of the oscilloscope 8 , the A-phase voltage output terminal of the main transformer high-voltage side voltage transformer 1 is connected together with the fourth voltage signal acquisition terminal V4 of the oscilloscope 8; the A-phase current output terminal of the dynamic reactive power compensation device current transformer 7 is connected with the recorder The first current signal acquisition end I1 of the oscilloscope 8 is connected together, the B-phase current output end of the dynamic reactive power compensation device current transformer 7 is connected together with the second current signal acquisition end I2 of the oscilloscope 8, and the dynamic The C-phase current output end of the reactive power compensation device current transformer 7 is connected together with the third current signal acquisition end 13 of the wave recorder 8, and the A-phase current output end of the first collector line current transformer 10 is connected with the wave recorder 8. The fourth current signal acquisition end I 4 of instrument 8 is connected together;
第四步、根据第一集电线路3上的电流，以录波仪8的第四电流信号采集端I4电流波形输入为参考设置录波器为突变量触发录波，并设置录波时间为100毫秒，触发前录波时间为10毫秒； The 4th step, according to the electric current on the first collector circuit 3, take the fourth current signal acquisition terminal I 4 current waveform input of the oscilloscope 8 as a reference to set the oscilloscope to trigger the wave recording for the abrupt amount, and set the wave recording time 100 milliseconds, and the recording time before triggering is 10 milliseconds;
第五步、将第一集电线路3上的第一断路器4合上，等待2-3分钟，完成录波采样过程； Step 5, close the first circuit breaker 4 on the first collector line 3, wait for 2-3 minutes, and complete the wave recording and sampling process;
第六步、将录波仪8记录数据导入响应波形分析系统9，利用记录的动态无功补偿装置三相输出电压和电流数据，基于瞬时无功计算理论，计算出动态无功补偿装置的瞬时输出无功； The sixth step is to import the data recorded by the wave recorder 8 into the response waveform analysis system 9, and use the recorded three-phase output voltage and current data of the dynamic reactive power compensation device to calculate the instantaneous reactive power of the dynamic reactive power compensation device based on the theory of instantaneous reactive power calculation. output reactive power;
第七步、将主变高压侧A相电压曲线与动态无功补偿装置的瞬时输出无功曲线绘制在同一坐标轴内。 The seventh step is to draw the A-phase voltage curve of the high-voltage side of the main transformer and the instantaneous output reactive power curve of the dynamic reactive power compensation device in the same coordinate axis.
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| CN108879713A (en) * | 2018-06-28 | 2018-11-23 | 中石化南京工程有限公司 | A kind of setting method of reactive power compensation device sampled current transformer position |
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| CN105866592A (en) * | 2016-05-18 | 2016-08-17 | 国网山西省电力公司电力科学研究院 | System and method for acquiring dynamic reactive power compensation response waveforms |
| CN105866592B (en) * | 2016-05-18 | 2018-01-02 | 国网山西省电力公司电力科学研究院 | Dynamic passive compensation response wave shape acquisition system and acquisition method |
| CN108879713A (en) * | 2018-06-28 | 2018-11-23 | 中石化南京工程有限公司 | A kind of setting method of reactive power compensation device sampled current transformer position |
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