CN103676623A - Time scale unified dynamic reactive power generating device response time detecting method - Google Patents

本发明公开了一种统一时标的动态无功发生装置响应时间测定方法，解决了现有技术存在的对动态无功发生装置的响应时间测定不准确的问题。包括高压侧母线、低压侧母线、动态无功发生装置和波形记录仪，将第一集电线路电流互感器（11）的二次侧A相与波形记录仪（4）的第二电流波形输入端子电连接，操作断路器（10），完成响应电流波形和响应电压波形的采样；在计算机中，利用“离散数据计算有效值工具”，搭建响应时间计算模型，设置计算时间为800毫秒，生成平滑的响应过程电压有效值曲线（15）及电流有效值曲线（16），得到精确的动态无功发生装置响应时间。能准确的计算出动态无功发生装置的响应时间，特别适合在电网现场使用。

The invention discloses a method for measuring the response time of a dynamic reactive power generating device with a unified time scale, which solves the problem of inaccurate measurement of the response time of the dynamic reactive power generating device existing in the prior art. Including high-voltage side busbar, low-voltage side busbar, dynamic var generator and waveform recorder, input the secondary side A phase of the current transformer (11) of the first collector line and the second current waveform of the waveform recorder (4) Connect the terminals electrically, operate the circuit breaker (10), and complete the sampling of the response current waveform and response voltage waveform; in the computer, use the "discrete data calculation effective value tool" to build a response time calculation model, set the calculation time to 800 milliseconds, and generate Smooth response process voltage RMS curve (15) and current RMS curve (16), to obtain accurate response time of the dynamic reactive power generating device. It can accurately calculate the response time of the dynamic reactive power generating device, and is especially suitable for use on the grid site.

统一时标的动态无功发生装置响应时间测定方法Method for Measuring Response Time of Dynamic Var Generator with Unified Time Scale

技术领域 technical field

本发明涉及一种在电网中所接入的动态无功发生装置对系统电压扰动的响应时间的测定方法。 The invention relates to a method for measuring the response time of a dynamic reactive power generation device connected in a power grid to system voltage disturbances.

背景技术 Background technique

风电场大规模接入电网后，大批的电力电子装置的应用对电网造成了新的问题，特别是风电大规模脱网，会对电网造成严重影响。为了保障系统的安全稳定运行，对风电场动态无功发生装置的响应时间提出了新的要求。根据有关要求，风电场动态无功发生装置响应时间应在30毫秒以内，这就需要在现场对动态无功发生装置的响应时间进行有效真实地进行测定，从而对现场安装的风电场动态无功发生装置的性能进行评价。现有的测定方法是依靠动态无功发生装置自身发脉冲来模拟制造扰动，不能反映扰动源的真实情况，且无法全面地检测出动态无功发生装置各个部分的联动响应波形，造成对响应时间的测定不准确，进而导致对动态无功发生装置的性能评价失去真实性。 After the large-scale connection of wind farms to the power grid, the application of a large number of power electronic devices has caused new problems to the power grid, especially the large-scale disconnection of wind power, which will have a serious impact on the power grid. In order to ensure the safe and stable operation of the system, new requirements are put forward for the response time of the wind farm dynamic reactive power generator. According to the relevant requirements, the response time of the dynamic reactive power generating device in the wind farm should be within 30 milliseconds, which requires effective and true measurement of the response time of the dynamic reactive power generating device on site, so as to determine the dynamic reactive power of the wind farm installed on site The performance of the generator is evaluated. The existing measurement method is to rely on the dynamic var generator itself to send pulses to simulate the disturbance, which cannot reflect the real situation of the disturbance source, and cannot fully detect the linkage response waveform of each part of the dynamic var generator, resulting in the response time The inaccurate measurement of the dynamic var generator will lead to the loss of authenticity in the performance evaluation of the dynamic var generator.

发明内容 Contents of the invention

本发明提供了一种统一时标的动态无功发生装置响应时间测定方法，解决了现有技术存在的对动态无功发生装置的响应时间测定不准确的问题。 The invention provides a method for measuring the response time of a dynamic reactive power generating device with a unified time scale, which solves the problem of inaccurate measurement of the response time of the dynamic reactive power generating device existing in the prior art.

本发明是通过以下方案解决以上问题的： The present invention solves the above problems through the following solutions:

一种统一时标的动态无功发生装置响应时间的测定装置，包括高压侧母线、低压侧母线、动态无功发生装置和波形记录仪，在高压侧母线上分别电连接有变压器、高压侧电压互感器，在低压侧母线上分别电连接有第一集电线路、第二集电线路、动态无功发生装置和低压侧电压互感器，在低压侧母线与第一集电线路之间设置有断路器，在第一集电线路上设置有第一集电线路电流互感器，第一集电线路电流互感器的二次侧A相与波形记录仪的第二电流波形输入端子电连接，在第二集电线路上设置有第二集电线路电流互感器，第二集电线路电流互感器的二次侧A相与波形记录仪的第三电流波形输入端子电连接，在母线与动态无功发生装置之间的连线上设置有无功发生装置连接线路电流互感器，无功发生装置连接线路电流互感器的二次侧A相与波形记录仪的第四电流波形输入端子电连接，在变压器上设置有变压器高压侧电流互感器，变压器高压侧电流互感器的二次侧A相与波形记录仪的第一电流波形输入端子电连接，高压侧电压互感器的二次侧A相与波形记录仪的第一电压波形输入端子电连接，低压侧电压互感器的二次侧A相与波形记录仪的第二、第三、第四电压波形输入端子电连接。 A device for measuring the response time of a dynamic reactive power generating device with a unified time scale, including a high-voltage side bus, a low-voltage side bus, a dynamic reactive power generating device and a waveform recorder, and a transformer and a high-voltage side voltage mutual inductance are respectively electrically connected to the high-voltage side bus The first collector line, the second collector line, the dynamic reactive power generating device and the voltage transformer on the low-voltage side are respectively electrically connected to the low-voltage side busbar, and a circuit breaker is set between the low-voltage side busbar and the first collector line device, a first collector line current transformer is arranged on the first collector line, the secondary side A phase of the first collector line current transformer is electrically connected to the second current waveform input terminal of the waveform recorder, and the second The current collector line is equipped with a second collector line current transformer, the secondary side A phase of the second collector line current transformer is electrically connected to the third current waveform input terminal of the waveform recorder, and the busbar is connected to the dynamic reactive power generator There is a reactive power generating device connected to the line current transformer on the connection between them, and the secondary side A phase of the reactive power generating device connected to the line current transformer is electrically connected to the fourth current waveform input terminal of the waveform recorder. A current transformer on the high voltage side of the transformer is provided, the secondary side A phase of the high voltage side current transformer of the transformer is electrically connected to the first current waveform input terminal of the waveform recorder, and the secondary side A phase of the high voltage side voltage transformer is connected to the waveform recorder The first voltage waveform input terminal is electrically connected to the first voltage waveform input terminal, and the secondary side A phase of the voltage transformer on the low voltage side is electrically connected to the second, third and fourth voltage waveform input terminals of the waveform recorder.

波形记录仪的第二、第三、第四电压波形输入端子是并联在一起的。 The second, third and fourth voltage waveform input terminals of the waveform recorder are connected in parallel.

一种统一时标的动态无功发生装置响应时间测定方法，包括以下步骤： A method for measuring the response time of a dynamic reactive power generating device with a unified time scale, comprising the following steps:

第一步、选择负荷最大的集电线路为第一集电线路，再选择其他正常运行的一个集电线路为第二集电线路； 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、在低压侧母线与第一集电线路之间设置有断路器，在第一集电线路上设置第一集电线路电流互感器，将第一集电线路电流互感器的二次侧A相与波形记录仪的第二电流波形输入端子电连接，在第二集电线路上设置第二集电线路电流互感器，将第二集电线路电流互感器的二次侧A相与波形记录仪的第三电流波形输入端子电连接，在低压侧母线与动态无功发生装置之间的连线上设置无功发生装置连接线路电流互感器，将无功发生装置连接线路电流互感器的二次侧A相与波形记录仪的第四电流波形输入端子电连接，在变压器上设置变压器高压侧电流互感器，将变压器高压侧电流互感器的二次侧A相与波形记录仪的第一电流波形输入端子电连接，在高压侧母线上设置高压侧电压互感器，将高压侧电压互感器的二次侧A相与波形记录仪的第一电压波形输入端子电连接，在低压侧母线上设置低压侧电压互感器，将低压侧电压互感器的二次侧A相与波形记录仪的第二、第三、第四电压波形输入端子电连接，该步骤所述接线方式保证了各测点的波形统一在同一时标下； In the second step, a circuit breaker is set between the low-voltage side busbar and the first collector line, and the first collector line current transformer is installed on the first collector line, and the secondary side of the first collector line current transformer is Phase A is electrically connected to the second current waveform input terminal of the waveform recorder, and a second collector line current transformer is installed on the second collector line, and the secondary side A phase of the second collector line current transformer is connected to the waveform recorder. The third current waveform input terminal of the instrument is electrically connected, and the reactive power generating device is connected to the line current transformer on the connection between the low-voltage side bus bar and the dynamic reactive power generating device, and the reactive power generating device is connected to the second of the line current transformer. Phase A of the secondary side is electrically connected to the fourth current waveform input terminal of the waveform recorder, and a current transformer on the high-voltage side of the transformer is installed on the transformer, and the phase A of the secondary side of the current transformer on the high-voltage side of the transformer is connected to the first current waveform of the waveform recorder. The waveform input terminal is electrically connected, and the high-voltage side voltage transformer is installed on the high-voltage side bus, and the secondary side A phase of the high-voltage side voltage transformer is electrically connected to the first voltage waveform input terminal of the waveform recorder, and the voltage transformer is installed on the low-voltage side bus. The voltage transformer on the low-voltage side, electrically connect the secondary side A phase of the voltage transformer on the low-voltage side to the second, third, and fourth voltage waveform input terminals of the waveform recorder. The wiring method described in this step ensures the The waveforms are unified under the same time scale;

第三步、根据第一集电线路上的断路器断开时电流的突变量设置波形记录仪，并设置录波时间为800毫秒，启动波形记录仪； The third step is to set the waveform recorder according to the sudden change of the current when the circuit breaker on the first collector line is disconnected, and set the wave recording time to 800 milliseconds, and start the waveform recorder;

第四步、操作断路器，将第一集电线路切断，从切断时开始计时，过三分钟后下载波形记录仪数据，完成响应电流波形和响应电压波形的采样； Step 4: Operate the circuit breaker to cut off the first collector line, start timing from the time of cutting off, and download the waveform recorder data after three minutes, and complete the sampling of the response current waveform and response voltage waveform;

第五步、使用波形分析软件，分析下载的电压、电流波形采样数据。将采样波形以离散点的形式导出并进行编辑，最终形成ASCII格式数据文件，将其导入至计算机中； The fifth step is to use the waveform analysis software to analyze the downloaded voltage and current waveform sampling data. Export and edit the sampling waveform in the form of discrete points, finally form an ASCII format data file, and import it into the computer;

第六步、在计算机中，利用“离散数据计算有效值工具”，搭建响应时间计算模型，设置计算时间为800毫秒，生成平滑的响应过程电压、电流有效值曲线； Step 6. In the computer, use the "discrete data calculation effective value tool" to build a response time calculation model, set the calculation time to 800 milliseconds, and generate a smooth response process voltage and current effective value curve;

第七步、对有效值曲线进行标度，以系统电压超出电压合格区间为响应起始点，以动态无功发生装置输出电流达到目标值的90%为响应结束点，得到精确的动态无功发生装置响应时间。 The seventh step is to scale the RMS curve, take the system voltage exceeding the voltage qualified range as the starting point of the response, and take the output current of the dynamic var generator to reach 90% of the target value as the end point of the response to obtain accurate dynamic var generation Device response time.

本发明利用有功扰动引起电压和电流无功的波动，模拟真实的系统电压扰动，可以直接在统一时标下，测得动态无功发生装置、集电线路以及变压器高、低压侧电压、电流波形，并准确的计算出动态无功发生装置的响应时间，特别适合在电网现场使用。 The present invention utilizes the fluctuation of voltage and current reactive power caused by active power disturbance to simulate the real system voltage disturbance, and can directly measure the dynamic reactive power generation device, collector line, voltage and current waveform of high and low voltage sides of transformer under the unified time scale , and accurately calculate the response time of the dynamic reactive power generating device, especially suitable for use on the grid site.

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 the structural representation of detection circuit of the present invention;

图2是本发明的采样数据导出文件示意图； Fig. 2 is a schematic diagram of the sampling data export file of the present invention;

图3是本发明的响应时间计算模型示意图； Fig. 3 is a schematic diagram of a response time calculation model of the present invention;

图4是本发明的响应时间标度示意图。 Fig. 4 is a schematic diagram of the response time scale of the present invention.

具体实施方式 Detailed ways

一种统一时标的动态无功发生装置响应时间的测定装置，包括高压侧母线1、低压侧母线2、动态无功发生装置3和波形记录仪4，在高压侧母线1上分别电连接有变压器5、高压侧电压互感器6，在低压侧母线2上分别电连接有第一集电线路7、第二集电线路8、动态无功发生装置3和低压侧电压互感器9，在低压侧母线2与第一集电线路7之间设置有断路器10，在第一集电线路7上设置有第一集电线路电流互感器11，第一集电线路电流互感器11的二次侧A相与波形记录仪4的第二电流波形输入端子电连接，在第二集电线路8上设置有第二集电线路电流互感器12，第二集电线路电流互感器12的二次侧A相与波形记录仪4的第三电流波形输入端子电连接，在低压侧母线2与动态无功发生装置3之间的连线上设置有无功发生装置连接线路电流互感器13，无功发生装置连接线路电流互感器13的二次侧A相与波形记录仪4的第四电流波形输入端子电连接，在变压器5上设置有变压器高压侧电流互感器14，变压器高压侧电流互感器14的二次侧A相与波形记录仪4的第一电流波形输入端子电连接，高压侧电压互感器6的二次侧A相与波形记录仪4的第一电压波形输入端子电连接，低压侧电压互感器9的二次侧A相与波形记录仪4的第二、第三、第四电压波形输入端子电连接。 A device for measuring the response time of a dynamic reactive power generating device with a unified time scale, including a high-voltage side bus 1, a low-voltage side bus 2, a dynamic reactive power generating device 3 and a waveform recorder 4, and a transformer is electrically connected to the high-voltage side bus 1 5. The voltage transformer 6 on the high-voltage side is electrically connected to the bus bar 2 on the low-voltage side with the first collector line 7, the second collector line 8, the dynamic reactive power generating device 3 and the voltage transformer 9 on the low-voltage side. A circuit breaker 10 is arranged between the bus bar 2 and the first collector line 7, a first collector circuit current transformer 11 is arranged on the first collector circuit 7, and the secondary side of the first collector circuit current transformer 11 Phase A is electrically connected to the second current waveform input terminal of the waveform recorder 4, and the second collector circuit current transformer 12 is arranged on the second collector circuit 8, and the secondary side of the second collector circuit current transformer 12 Phase A is electrically connected to the third current waveform input terminal of the waveform recorder 4, and a reactive power generating device is connected to a line current transformer 13 on the connection between the low-voltage side bus 2 and the dynamic reactive power generating device 3. The secondary side A phase of the generating device connection line current transformer 13 is electrically connected to the fourth current waveform input terminal of the waveform recorder 4, and the transformer 5 is provided with a transformer high-voltage side current transformer 14, and the transformer high-voltage side current transformer 14 Phase A of the secondary side of the waveform recorder 4 is electrically connected to the first current waveform input terminal of the waveform recorder 4, and phase A of the secondary side of the voltage transformer 6 on the high voltage side is electrically connected to the first voltage waveform input terminal of the waveform recorder 4, and the low voltage side voltage transformer 6 is electrically connected to the first voltage waveform input terminal of the waveform recorder 4. The secondary side A phase of the voltage transformer 9 is electrically connected to the second, third and fourth voltage waveform input terminals of the waveform recorder 4 .

波形记录仪4的第二、第三、第四电压波形输入端子是并联在一起的。 The second, third and fourth voltage waveform input terminals of the waveform recorder 4 are connected in parallel.

一种统一时标的动态无功发生装置响应时间测定方法，包括以下步骤： A method for measuring the response time of a dynamic reactive power generating device with a unified time scale, comprising the following steps:

第一步、选择负荷最大的集电线路为第一集电线路7，第一集电线路7的有功功率要求大于额定功率的80%，再选择其他正常运行的一个集电线路为第二集电线路8； The first step is to select the collector line with the largest load as the first collector line 7, the active power of the first collector line 7 is required to be greater than 80% of the rated power, and then select another collector line in normal operation as the second collector line electrical line 8;

第二步、在低压侧母线2与第一集电线路7之间设置有断路器10，在第一集电线路7上设置第一集电线路电流互感器11，将第一集电线路电流互感器11的二次侧A相与波形记录仪4的第二电流波形输入端子电连接，在第二集电线路8上设置第二集电线路电流互感器12，将第二集电线路电流互感器12的二次侧A相与波形记录仪4的第三电流波形输入端子电连接，在低压侧母线2与动态无功发生装置3之间的连线上设置无功发生装置连接线路电流互感器13，将无功发生装置连接线路电流互感器13的二次侧A相与波形记录仪4的第四电流波形输入端子电连接，在变压器5上设置变压器高压侧电流互感器14，将变压器高压侧电流互感器14的二次侧A相与波形记录仪4的第一电流波形输入端子电连接，在高压侧母线1上设置高压侧电压互感器6，将高压侧电压互感器6的二次侧A相与波形记录仪4的第一电压波形输入端子电连接，在低压侧母线2上设置低压侧电压互感器9，将低压侧电压互感器9的二次侧A相与波形记录仪4的第二、第三、第四电压波形输入端子电连接，该步骤所述接线方式保证了各测点的波形统一在同一时标下； In the second step, a circuit breaker 10 is arranged between the low-voltage side busbar 2 and the first collector line 7, and a first collector circuit current transformer 11 is arranged on the first collector circuit 7 to convert the first collector circuit current The secondary side A phase of the transformer 11 is electrically connected to the second current waveform input terminal of the waveform recorder 4, and the second collector circuit current transformer 12 is arranged on the second collector circuit 8 to convert the second collector circuit current The secondary side A phase of the transformer 12 is electrically connected to the third current waveform input terminal of the waveform recorder 4, and a reactive power generator is set on the connection between the low-voltage side bus 2 and the dynamic reactive power generator 3 to connect the line current Transformer 13 electrically connects the secondary side A phase of the reactive power generating device connection line current transformer 13 with the fourth current waveform input terminal of the waveform recorder 4, and sets the transformer high-voltage side current transformer 14 on the transformer 5, and the Phase A of the secondary side of the current transformer 14 on the high voltage side of the transformer is electrically connected to the first current waveform input terminal of the waveform recorder 4, and a voltage transformer 6 on the high voltage side is arranged on the bus bar 1 on the high voltage side, and the voltage transformer 6 on the high voltage side Phase A on the secondary side is electrically connected to the first voltage waveform input terminal of the waveform recorder 4, and a voltage transformer 9 on the low-voltage side is installed on the bus bar 2 on the low-voltage side, and phase A on the secondary side of the voltage transformer 9 on the low-voltage side is connected to the waveform recording The second, third, and fourth voltage waveform input terminals of instrument 4 are electrically connected, and the wiring method described in this step ensures that the waveforms of each measuring point are unified under the same time scale;

第三步、根据第一集电线路7上的断路器10断开时电流的突变量设置波形记录仪4，并设置录波时间为800毫秒，启动波形记录仪4； The 3rd step, set waveform recorder 4 according to the sudden change of current when the circuit breaker 10 on the first collector line 7 is disconnected, and set the recording time as 800 milliseconds, start waveform recorder 4;

第四步、操作断路器10，将第一集电线路7切断，从切断时开始计时，过三分钟后下载波形记录仪4数据，完成响应电流波形和响应电压波形的采样； Step 4: Operate the circuit breaker 10 to cut off the first collector line 7, start timing from the time of cutting off, download the waveform recorder 4 data after three minutes, and complete the sampling of the response current waveform and the response voltage waveform;

第五步、使用波形分析软件，分析下载的电压、电流波形采样数据，将采样波形以离散点的形式导出并进行编辑，最终形成ASCII格式数据文件，将其导入至计算机中； The fifth step is to use the waveform analysis software to analyze the downloaded voltage and current waveform sampling data, export and edit the sampling waveform in the form of discrete points, and finally form an ASCII format data file, and import it into the computer;

第六步、在计算机中，利用“离散数据计算有效值工具”，搭建响应时间计算模型，设置计算时间为800毫秒，生成平滑的响应过程电压有效值曲线15及电流有效值曲线16； Step 6. In the computer, use the "discrete data calculation effective value tool" to build a response time calculation model, set the calculation time to 800 milliseconds, and generate a smooth response process voltage effective value curve 15 and current effective value curve 16;

第七步、对电压有效值曲线15、电流有效值曲线16进行标度，以系统电压超出电压合格区间为响应起始点17，以动态无功发生装置输出电流达到目标值的90%为响应结束点18，得到精确的动态无功发生装置响应时间。 Step 7: Scale the voltage RMS curve 15 and the current RMS curve 16, take the system voltage exceeding the qualified voltage range as the starting point 17 of the response, and end the response when the output current of the dynamic var generator reaches 90% of the target value At point 18, get the precise response time of the dynamic var generating device.

本装置及方法是基于常规波形记录仪及电力系统仿真软件，接线形式及分析方法简单，测试结果直观准确，具有较强的可移植性。 The device and method are based on a conventional waveform recorder and power system simulation software, with simple wiring forms and analysis methods, intuitive and accurate test results, and strong portability.

1. a target dynamic reactive generating means response time assay method while unifying, comprises the following steps:

The first step, to select the maximum current collection circuit of load be the first current collection circuit (7), and the active power of the first current collection circuit (7) requires to be greater than 80% of rated power, then to select current collection circuits for other normal operations be the second current collection circuit (8; )

Second step, between low-pressure side bus (2) and the first current collection circuit (7), be provided with isolating switch (10), the first current collection line current mutual inductor (11) is set on the first current collection circuit (7), the secondary side A phase of the first current collection line current mutual inductor (11) is electrically connected to the second current waveform input terminal of wave tracer (4), the second current collection line current mutual inductor (12) is set on the second current collection circuit (8), the secondary side A phase of the second current collection line current mutual inductor (12) is electrically connected to the 3rd current waveform input terminal of wave tracer (4), on the line between low-pressure side bus (2) and dynamic reactive generating means (3), reactive generating device connection line current transformer (13) is set, the secondary side A phase of reactive generating device connection line current transformer (13) is electrically connected to the 4th current waveform input terminal of wave tracer (4), high voltage side of transformer current transformer (14) is set on transformer (5), the secondary side A phase of high voltage side of transformer current transformer (14) is electrically connected to the first current waveform input terminal of wave tracer (4), high side voltage mutual inductor (6) is set on high-voltage side bus (1), the secondary side A phase of high side voltage mutual inductor (6) is electrically connected to the first voltage waveform input terminal of wave tracer (4), low-pressure side voltage transformer (VT) (9) is set on low-pressure side bus (2), by second of the secondary side A phase of low-pressure side voltage transformer (VT) (9) and wave tracer (4), the 3rd, the 4th voltage waveform input terminal is electrically connected to, described in this step, the mode of connection has guaranteed that the waveform of each measuring point is unified under same markers,

The 3rd step, the Sudden Changing Rate of electric current arranges wave tracer (4) while disconnecting according to isolating switch (10) on the first current collection circuit (7), and the record ripple time is set is 800 milliseconds, starts wave tracer (4);

The 4th step, operating breaker (10), cut off the first current collection circuit (7), during from cut-out, starts timing, excessively after three minutes, downloads wave tracer (4) data, completes the sampling of response current waveform and response voltage waveform;

The 5th step, use wave form analysis software, analyze voltage, the current waveform sampled data downloaded, sample waveform is derived to the edlin of going forward side by side with the form of discrete point, finally form ASCII fromat data file, be directed in computing machine;

The 6th step, in computing machine, utilize " discrete data is calculated effective value instrument ", build response time computation model, be set computing time is 800 milliseconds, generates level and smooth response process voltage effective value curve (15) and current effective value curve (16);

The 7th step, voltage effective value curve (15), current effective value curve (16) are carried out to scale, the system voltage of take exceeds voltage interval of acceptance as response starting point (17), the dynamic reactive generating means output current of take reach desired value 90% as response end point (18), obtain the accurate dynamic reactive generating means response time.