A reactive compensation module detection and evaluation system and method

Abstract

The present application belongs to the technical field of reactive power compensation module detection and evaluation, and particularly relates to a reactive power compensation module detection and evaluation system and method; the system comprises a virtual simulation platform, a standard source, a controllable power supply, an adjustable load, a fusion terminal and a control host, etc., the virtual simulation platform is used for constructing a simulated reactive power compensation module; the standard source provides standard signals of voltage and current; the controllable power supply and the adjustable load generate voltages and currents under various working conditions according to the instructions of the control host, simulate various operating conditions; the fusion terminal is responsible for the communication between the actual reactive power compensation module and the control host; the control host as the core of the system, according to the standard signals and the actual detection data, comprehensively evaluates various performance indicators of the reactive power compensation module, and gives the final evaluation result; through the virtual simulation platform, the running conditions under various working conditions can be simulated comprehensively, and the comprehensiveness and accuracy of the test results are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of reactive compensation module detection and evaluation, and in particular relates to a reactive compensation module detection and evaluation system and method. Background Art

[0002] With power grid companies increasing their requirements for reactive power and voltage indicators in distribution networks, and with increasing customer complaints about low voltage and three-phase imbalance, reactive power compensation equipment (including smart capacitors and SVGs) plays a vital role in improving reactive power distribution and supporting voltage stability, becoming a widely used power equipment in modern distribution networks. However, the quality, compensation effectiveness, and functional indicators of such equipment vary widely, and this quality will affect the effectiveness of the distribution network reactive power and voltage professional development.

[0003] Current testing methods for reactive power equipment are relatively backward, with weak testing capabilities and low efficiency, making it difficult to effectively control the quality of grid-connected equipment and its practical performance in the field. Furthermore, current testing methods lack clear evaluation strategies for different batches of tested equipment to assess the quality control level of each batch. Furthermore, they lack simulation modeling for the tested equipment (for example, photovoltaic inverters and static VAR generators) to support pre-assessment analysis and verification of suitability for specific operating conditions. Traditional testing and evaluation methods for reactive power compensation modules suffer from numerous shortcomings. First, the complex and variable nature of actual testing environments makes it difficult to fully simulate operating conditions under various operating conditions, often resulting in limited test results. Second, the actual testing process requires a significant investment of manpower, material resources, and time, resulting in high costs and low efficiency. Finally, due to limited testing conditions, a comprehensive and accurate assessment of the various performance indicators of reactive power compensation modules is difficult, thus impacting the safe and stable operation of power systems. Summary of the Invention

[0004] An object of the present invention is to provide a reactive power compensation module detection and evaluation system and method to solve at least one of the problems in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a reactive power compensation module detection and evaluation system, comprising:

[0007] A virtual simulation platform is used to construct a simulated reactive power compensation module; wherein, the simulated reactive power compensation module is obtained by simulating the capacitive characteristic of the actual reactive power compensation module in the virtual simulation platform;

[0008] Standard source, used to provide standard signals of voltage and current;

[0009] The controllable power supply is configured to receive control instructions from the control host, generate voltages and currents in various operating conditions according to the received control instructions, and supply the adjustable load;

[0010] The adjustable load is configured to receive control instructions from the control host, cooperate with the controllable power supply to simulate various operating conditions according to the received control instructions;

[0011] The fusion terminal is configured to communicate between the actual reactive power compensation module and the control host;

[0012] The control host is configured to send control instructions to the controllable power supply to control the controllable power supply to generate voltages and currents in various operating conditions according to standard signals provided by the standard source, and send control instructions to the controllable load to control the adjustable load to operate in corresponding different operating conditions. The control host obtains relevant data corresponding to each actual reactive power compensation module in different operating conditions through the fusion terminal, determines a first evaluation result of each actual reactive power compensation module in a real test according to the relevant data of each actual reactive power compensation module, receives relevant data of each simulation reactive power compensation module in different operating conditions, determines a second evaluation result of each simulation reactive power compensation module in a simulation environment based on the relevant data of each simulation reactive power compensation module, and determines a final evaluation result of the actual reactive power compensation module according to the first evaluation result, the second evaluation result, and preset weights corresponding to the first evaluation result and the second evaluation result, respectively.

[0013] The controllable power supply and the adjustable load form a main circuit for detecting and evaluating the reactive power compensation module.

[0014] Further, the simulation reactive power compensation module is obtained by simulating the capacitive characteristic quantity of the actual reactive power compensation module in a virtual simulation platform, including:

[0015] The actual operating electrical quantity data of the actual reactive power compensation module is obtained, and the actual operating electrical quantity data includes current, voltage, and power factor;

[0016] The actual operating electrical quantity data is input into a pre-trained capacitive characteristic quantity identification model, and the deep neural network model outputs the capacitive characteristic quantity corresponding to the reactive power compensation module; the capacitive characteristic quantity identification model is constructed and trained based on a deep neural network;

[0017] Based on the output capacitive characteristic quantity, a simulation reactive power compensation module is constructed in a simulation environment.

[0018] Further, the control host is specifically configured to:

[0019] The standard signal is obtained from the standard source;

[0020] The control host controls the controllable power supply to output the main circuit voltage and current corresponding to the standard signal, and acquires the main circuit voltage and current data detected by the actual reactive power compensation module; wherein the main circuit voltage and current data detected by the actual reactive power compensation module are acquired by a collection component of the actual reactive power compensation module and sent to the control host by a controller of the actual reactive power compensation module.

[0021] The control host compares the main circuit voltage and current data detected by the actual reactive power compensation module with the main circuit voltage and current corresponding to the standard signal, calculates the sampling error of the actual reactive power compensation module, and determines the sampling precision sensitivity evaluation result of the actual reactive power compensation module based on the sampling error.

[0022] Further, the control host is specifically further used for:

[0023] acquiring the standard signal from the standard source;

[0024] controlling the controllable power supply to output the main circuit voltage and current corresponding to the standard signal; wherein the standard signal is a signal simulating the change of the main circuit reactive power shortage;

[0025] acquiring the actual switching logic of the actual reactive power compensation module under the condition that the main circuit reactive power shortage changes, determining whether the reactive power compensation logic of the actual reactive power compensation module is normal from the actual switching logic and the theoretical logic, and determining whether the amount of current injected by the actual reactive power compensation module meets the allowable error range through repeated switching;

[0026] determining the reactive power compensation error evaluation result according to the reactive power compensation logic determination result and the current amount error determination result.

[0027] Further, the control host is specifically further used for:

[0028] acquiring the standard signal from the standard source;

[0029] controlling the controllable power supply and the adjustable load, outputting different voltages and currents from the main circuit according to the set protection parameters, testing the protection function of the actual reactive power compensation module, and obtaining the protection function evaluation result.

[0030] Further, the control host is specifically further used for:

[0031] acquiring the standard signal from the standard source;

[0032] controlling the fusion terminal and the actual reactive power compensation module to automatically perform protocol compliance testing according to each corresponding protocol, and obtaining the protocol compliance testing result.

[0033] Further, the control host is specifically further used for:

[0034] Numbering each reactive module in the simulation reactive compensation module;

[0035] Different voltage levels and corresponding current levels are set respectively;

[0036] Under different voltage levels and corresponding current levels, the simulation reactive control module is tested for zero switching and reactive module combination control characteristics respectively to obtain zero switching evaluation results and reactive module combination control evaluation results.

[0037] Further, the control host is specifically further used for:

[0038] The sampling accuracy sensitivity evaluation results, the reactive compensation error evaluation results, the protection function evaluation results and the protocol compliance evaluation results are multiplied by corresponding weights respectively, and then summed to obtain a first evaluation result;

[0039] The zero switching evaluation results and the reactive module combination control evaluation results are multiplied by corresponding weights respectively, and then summed to obtain a second evaluation result;

[0040] The first evaluation result and the second evaluation result are multiplied by corresponding weights respectively, and then summed to obtain a final evaluation result.

[0041] Further, the weights corresponding to the sampling accuracy sensitivity evaluation results, the reactive compensation error evaluation results, the protection function evaluation results and the protocol compliance evaluation results are all 25%;

[0042] The weights corresponding to the zero switching evaluation results and the reactive module combination control evaluation results are both 50%;

[0043] The weights corresponding to the first evaluation result and the second evaluation result are 80% and 20% respectively.

[0044] In the second aspect of the present application, a reactive compensation module detection and evaluation method is provided, which is realized based on the above-mentioned reactive compensation module detection and evaluation system, and comprises:

[0045] Determining a simulation reactive compensation module; wherein, through the capacitive characteristic quantity of an actual reactive compensation module, simulation is performed in a virtual simulation platform to obtain the simulation reactive compensation module;

[0046] According to the standard signal provided by the standard source, a control instruction is sent to the controllable power supply to control the controllable power supply to generate voltages and currents under various working conditions;

[0047] A control instruction is sent to the controllable load to control the adjustable load to operate under corresponding different working conditions;

[0048] The related data of each actual reactive power compensation module under different working conditions is acquired through the fusion terminal, and the first evaluation result of each actual reactive power compensation module under real testing is determined according to the related data of each actual reactive power compensation module.

[0049] The related data of each simulation reactive power compensation module under different working conditions is received, and the second evaluation result of each simulation reactive power compensation module under a simulation environment is determined based on the related data of each simulation reactive power compensation module.

[0050] The final evaluation result of the actual reactive power compensation module is determined according to the first evaluation result, the second evaluation result, and the preset weights corresponding to the first evaluation result and the second evaluation result.

[0051] Compared with the prior art, the present application has the following advantages:

[0052] In order to improve the detection and evaluation efficiency and accuracy of the reactive power compensation module, the present application provides a reactive power compensation module detection and evaluation system. The system includes a virtual simulation platform, a standard source, a controllable power supply, an adjustable load, a fusion terminal and a control host, etc., which realizes comprehensive and accurate detection and evaluation of the reactive power compensation module under different working conditions. Specifically, the virtual simulation platform is used to build a simulation reactive power compensation module, which is simulated by the capacitive characteristic quantity of the actual reactive power compensation module to simulate the running condition in the real environment. The standard source provides standard signals of voltage and current as the reference for evaluation. The controllable power supply and the adjustable load generate voltage and current under various working conditions according to the instructions of the control host to simulate various operating conditions. The fusion terminal is responsible for the communication between the actual reactive power compensation module and the control host to ensure real-time transmission and processing of data. The control host as the core of the system comprehensively evaluates the performance indicators of the reactive power compensation module according to the standard signals and the actual detection data, and gives the final evaluation result. Through the virtual simulation platform, the running condition under various working conditions can be fully simulated to ensure the comprehensiveness and accuracy of the test results. Moreover, the automated test process reduces manual intervention, improves test efficiency and accuracy, and reduces test cost.

[0053] In this scheme, the control host can intelligently evaluate the performance indicators of the reactive power compensation module according to the standard signals and the actual detection data, and give the final evaluation result.

[0054] At the same time, the system supports the test and evaluation of various reactive power compensation modules, and has good scalability and flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0055] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof, explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0056] Figure 1 A structure diagram of a reactive power compensation module detection and evaluation system according to an embodiment of the present application;

[0057] Figure 2 A flowchart of a reactive power compensation module detection and evaluation method according to an embodiment of the present application;

[0058] Figure 3 A flowchart of a reactive power compensation module detection and evaluation method according to an embodiment of the present application. DETAILED DESCRIPTION

[0059] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0060] The following detailed description is exemplary and is intended to provide further details of the present application. Unless otherwise defined, all technical terms used in the present application have the same meanings as generally understood by those skilled in the art to which the present application belongs. The terms used in the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the exemplary embodiments according to the present application.

[0061] Embodiment 1

[0062] In the embodiments of the present application, the intelligent capacitor assembly is taken as an example of the reactive power compensation module to explain and describe the reactive power compensation module detection and evaluation system.

[0063] As shown in Figure 1 A reactive power compensation module detection and evaluation system, comprising:

[0064] A virtual simulation platform for constructing a simulated reactive power compensation module; wherein the simulated reactive power compensation module is obtained by simulating the actual reactive power compensation module through the capacitive characteristic quantity of the actual reactive power compensation module;

[0065] A standard source for providing standard signals of voltage and current;

[0066] A controllable power supply for receiving control instructions of a control host, generating voltages and currents under various working conditions according to the received control instructions, and supplying the adjustable load;

[0067] An adjustable load for receiving control instructions of a control host, cooperating with the controllable power supply according to the received control instructions, and simulating various operating conditions;

[0068] A fusion terminal for communication between the actual reactive power compensation module and the control host;

[0069] The control host is used for sending control instructions to the controllable power supply according to a standard signal provided by a standard source, so as to control the controllable power supply to generate voltages and currents in various working conditions; and sending control instructions to the controllable load, so as to control the controllable load to operate in corresponding different working conditions; the control host obtains corresponding related data of each actual reactive power compensation module in different working conditions through a fusion terminal, determines a first evaluation result of each actual reactive power compensation module in a real test according to the related data of each actual reactive power compensation module; the control host is also used for receiving related data of each simulation reactive power compensation module in different working conditions, determining a second evaluation result of each simulation reactive power compensation module in a simulation environment based on the related data of each simulation reactive power compensation module; and the control host determines a final evaluation result of the actual reactive power compensation module according to the first evaluation result, the second evaluation result, and preset weights corresponding to the first evaluation result and the second evaluation result.

[0070] The controllable power supply and the controllable load form a main circuit for detecting and evaluating the reactive power compensation module.

[0071] The scheme of the reactive power compensation module detection and evaluation system reduces manual intervention, improves test efficiency and accuracy, and reduces test cost through an automatic test process. The control host intelligently evaluates various performance indicators of the reactive power compensation module according to standard signals and actual detection data, and gives a final evaluation result.

[0072] In an optional embodiment, the virtual simulation platform is composed of a simulator, a power amplifier and other components. The control host controls other devices to test the reactive power compensation module, for example, controls the controllable power supply to provide power for the main circuit, controls the switching, dynamic response time, compensation effect and other functional parameters of the reactive power compensation function. The standard source is used to provide standard power signals for the control host, which serves as the basis for the control host to send control information to the controllable power supply. The controllable power supply is used to accept instructions from the control host to provide controllable power for the main circuit, and cooperates with the controllable load to support the operation of the main circuit in various working conditions. The controllable load is used to accept instructions from the control host, and cooperates with the controllable power supply to simulate reactive power and harmonic sources, and to simulate inductive and capacitive reactive power generated by the load. The fusion terminal is mainly used to support the communication control function of the test and the measured reactive power compensation module.

[0073] Based on the above devices, zero-crossing switching and reactive power compensation module combination control are detected in the virtual simulation stage, and sampling accuracy and sensitivity of the reactive power compensation controller are detected in the actual detection stage; the reactive power compensation function of the reactive power compensation controller is detected; the protection function of the reactive power compensation; and the protocol compliance test.

[0074] In an optional embodiment, the capacitive characteristic quantity of the actual reactive power compensation module is simulated in the virtual simulation platform to obtain the simulation reactive power compensation module, including:

[0075] acquire actual operation electrical quantity data of the actual reactive power compensation module; wherein, the actual operation electrical quantity data comprises current, voltage and power factor;

[0076] input the actual operation electrical quantity data into the pre-trained capacitive characteristic quantity identification model, and the deep neural network model outputs the capacitive characteristic quantity corresponding to the reactive power compensation module; wherein, the capacitive characteristic quantity identification model is obtained based on deep neural network construction and training;

[0077] based on the output capacitive characteristic quantity, a simulation reactive power compensation module is constructed in a simulation environment.

[0078] In an optional embodiment, the control host is specifically used for:

[0079] acquiring a standard signal from the standard source;

[0080] controlling the controllable power supply to output the main circuit voltage and current corresponding to the standard signal, and acquiring the main circuit voltage and current data detected by the actual reactive power compensation module; wherein, the main circuit voltage and current data detected by the actual reactive power compensation module are collected by a collection component of the actual reactive power compensation module and sent to the control host through a controller of the actual reactive power compensation module;

[0081] comparing the main circuit voltage and current data detected by the actual reactive power compensation module with the main circuit voltage and current corresponding to the standard signal, calculating the sampling error of the actual reactive power compensation module, and determining the sampling precision sensitivity evaluation result of the actual reactive power compensation module based on the sampling error.

[0082] In an optional embodiment, the control host is specifically used for:

[0083] acquiring a standard signal from the standard source;

[0084] controlling the controllable power supply to output the main circuit voltage and current corresponding to the standard signal; wherein, the standard signal is a signal simulating the change of the main circuit reactive power;

[0085] acquiring the actual switching logic of the actual reactive power compensation module under the condition that the main circuit reactive power changes, determining whether the reactive power compensation logic of the actual reactive power compensation module is normal based on the actual switching logic and the theoretical logic, and determining whether the amount of current injected by the actual reactive power compensation module meets the allowable error range through repeated switching;

[0086] determining the reactive power compensation error evaluation result according to the reactive power compensation logic determination result and the current amount error determination result.

[0087] In an optional embodiment, the control host is specifically used for:

[0088] acquire a standard signal from the standard source;

[0089] By controlling the controllable power supply and the adjustable load, different voltages and currents are outputted by the main circuit according to the set protection parameters, the protection function of the actual reactive power compensation module is tested, and a protection function evaluation result is obtained.

[0090] In an optional embodiment, the control host is further used for:

[0091] acquire a standard signal from the standard source;

[0092] The control host is further used for:

[0093] In an optional embodiment, the control host is further used for:

[0094] numbering each reactive power module in the simulation reactive power compensation module;

[0095] different voltage levels and corresponding current levels are set respectively;

[0096] At different voltage levels and corresponding current levels, the simulation reactive power control module is tested for zero-point switching and reactive power module combination control characteristics respectively, and zero-point switching evaluation results and reactive power module combination control evaluation results are obtained.

[0097] In an optional embodiment, the control host is further used for:

[0098] The sampling accuracy sensitivity evaluation result, the reactive power compensation error evaluation result, the protection function evaluation result and the protocol compliance evaluation result are multiplied by corresponding weights respectively, and then summed to obtain a first evaluation result;

[0099] The zero-point switching evaluation result and the reactive power module combination control evaluation result are multiplied by corresponding weights respectively, and then summed to obtain a second evaluation result;

[0100] The first evaluation result and the second evaluation result are multiplied by corresponding weights respectively, and then summed to obtain a final evaluation result.

[0101] In an optional embodiment, the weights corresponding to the sampling accuracy sensitivity evaluation result, the reactive power compensation error evaluation result, the protection function evaluation result and the protocol compliance evaluation result are all 25%;

[0102] The weights corresponding to the zero-point switching evaluation result and the reactive power module combination control evaluation result are both 50%;

[0103] The first evaluation result and the second evaluation result correspond to weights of 80% and 20%, respectively.

[0104] Embodiment 2

[0105] As shown in Figure 2 A reactive compensation module detection evaluation method based on the reactive compensation module detection evaluation system of embodiment 1, comprising the following steps:

[0106] S1, determine a simulation reactive compensation module; wherein, through the capacitive characteristic quantity of the actual reactive compensation module, simulation is carried out in a virtual simulation platform to obtain the simulation reactive compensation module;

[0107] S2, according to the standard signal provided by the standard source, send control instructions to the controllable power supply to control the controllable power supply to generate voltages and currents under various working conditions;

[0108] S3, send control instructions to the controllable load to control the adjustable load to operate under corresponding different working conditions;

[0109] S4, through the fusion terminal, obtain the corresponding related data of each actual reactive compensation module under different working conditions, and determine the first evaluation result of each actual reactive compensation module under real test according to the related data of each actual reactive compensation module;

[0110] S5, receive the related data of each simulation reactive compensation module under different working conditions, and determine the second evaluation result of each simulation reactive compensation module under the simulation environment based on the related data of each simulation reactive compensation module;

[0111] S6, according to the first evaluation result, the second evaluation result, and the preset weights corresponding to the first evaluation result and the second evaluation result, determine the final evaluation result of the actual reactive compensation module.

[0112] The method can effectively improve the detection efficiency, control the main performance indicators of the equipment, effectively support the information interaction between the intelligent fusion terminal and the reactive compensation device in the transformer area, orderly promote the construction of new type fusion terminal, and guarantee the quality of network equipment and the effect of on-site practice.

[0113] In an optional embodiment, the detection of the sampling precision and sensitivity of the reactive compensation controller:

[0114] The host control standard source sends a standard electric quantity signal to the control host, and controls the controllable power supply and the adjustable load on the load side to cooperate with each other to simulate the change of the main circuit reactive power, detects the actual switching logic of the controller of the reactive power compensation module and the theoretical logic, judges whether the reactive power compensation logic is normal or not, judges whether the error range is met through repeated switching, and the amount of current injected by the reactive power compensation module can be collected by an oscilloscope. The detection is based on JBT 9663-2013 "Low-voltage reactive power compensation controller execution standard", and the action error should not exceed the allowable error listed in the following table.

[0115] Taking the measurement accuracy as an example: when the power factor angle The controller power factor measurement accuracy should be 1.5% when the power factor angle changes in the range of-30° to +30°; the controller voltage and current measurement accuracy should be ±1% when the voltage sampling input value changes in the range of 80% to 120% of the rated value and the current sampling input value changes in the range of 10% to 100% of the rated value. The controller reactive current and reactive power measurement accuracy should be ±2.5% when the reactive current value and the reactive power change in the range of 10% to 90% of the rated value.

[0116] Taking the sensitivity as an example: the detection platform can provide preset proportional voltage, current, etc., and preset angle power factor measurement points (which can be modified by default). For example, the controller sensitivity is set to be not greater than 0.2A, the detection platform can provide preset 80%, 100%, 120% rated voltage; 10%, 50%, 100% rated current. The-30°, 0°, 60° angle power factor measurement points can be preset with an allowable error percentage.

[0117] In an optional embodiment, the reactive power compensation function of the reactive power compensation module is detected:

[0118] The host controls the standard source to send a standard electric quantity signal to the control host, and controls the controllable power supply and the adjustable load on the load side to cooperate with each other to simulate the change of the main circuit reactive power, detects the actual switching logic of the controller of the reactive power compensation module and the theoretical logic, judges whether the reactive power compensation logic is normal or not; through repeated switching, whether the error range is met is judged, and the amount of current injected by the reactive power compensation module can be collected by an oscilloscope. The detection is based on JBT 9663-2013 "Low-voltage reactive power compensation controller execution standard", and the action error should not exceed the allowable error listed in the following table.

[0119] Control physical quantity Allowable error Reactive power ±5％ Reactive current ±5％ Power factor ±2.0％ Voltage ±2.0％ Overvoltage protection ±2.0％

[0120] In an optional embodiment, the protection function of the reactive power compensation:

[0121] The host can control the standard source to send signals, and control the controllable power supply and the adjustable load, so that the main circuit outputs different voltages and currents according to the set protection parameters, and the test controller and the reactive power compensation module have protection functions such as overvoltage, undervoltage, open phase, voltage harmonic, and current harmonic

[0122] In an optional embodiment, the protocol compliance test includes:

[0123] The host controls the fusion terminal and the reactive power compensation module, and automatically performs the protocol test according to the related protocol, and performs the test protocol compliance of real-time data and the like by one key remote measurement, remote signaling, remote control, parameter setting, and query, to determine whether it is qualified.

[0124] Embodiment 3

[0125] As shown in Figure 3 To further explain and illustrate the scheme, in some other embodiments of the scheme, a reactive power compensation module detection and evaluation method is further provided, which specifically includes:

[0126] A: Model building, mainly using artificial intelligence technology based on deep neural network as a means to build a simulation model of the measured reactive power compensation module.

[0127] B: Virtual simulation, mainly relying on a virtual simulation platform to carry out characteristic simulation evaluation analysis of the simulation reactive power compensation module under different operating conditions (mainly complex conditions), including zero-crossing switching, reactive power compensation module combination control, and the like, and setting an evaluation index a as a reference basis for subsequent actual testing and issuing a report.

[0128] C: Actual testing, which actually detects the sampling accuracy and sensitivity of the reactive power compensation controller through the remaining modules of the main circuit, detects the reactive power compensation function of the reactive power compensation controller, detects the protection function of the reactive power compensation, and tests the protocol compliance. Set the evaluation index β of the actual test.

[0129] D: Data analysis, which proposes an evaluation index f for batch detection equipment, which is composed of the evaluation index a representing virtual simulation and the evaluation index β representing actual testing, and the weights are set to 20% and 80%, respectively.

[0130] E: Verification, which is applied to special working condition scenes, such as the running stability and collaborative compensation function of the intelligent capacitor and the remaining power electronic devices (such as SVG).

[0131] In which, the detailed contents in each step are as follows:

[0132] Step A: In this embodiment, the RNN neural network algorithm is used, based on the training data set, the neural network model for evaluating the capacitive characteristic quantity of the intelligent capacitor assembly is trained; and based on the verification data set, the training effect is viewed to prevent overfitting. Specifically, the training data set can include the current, voltage, power factor, etc. of the intelligent capacitor assembly, and the corresponding capacitive characteristic quantity data.

[0133] Step B: Set 80%, 100%, 120% rated voltage; 10%, 50%, 100% rated current working conditions, the rated voltage and rated current can be combined according to actual needs; simulate and analyze the characteristics of the simulated reactive power compensation module, such as zero point switching and reactive power compensation module combination control, and the sub-evaluation indicators are represented by a1 and a2, the calculation method is the number of qualified detection sub-items / the total number of detection sub-items, and the weights are set to 50% respectively;

[0134] That is: a = 50% a1 + 50% a2.

[0135] Step C can be divided into the following sub-steps:

[0136] 1) The control host sends instructions to number the detected intelligent capacitor assembly and start the detection of multiple detected intelligent capacitors;

[0137] 2) The standard source sends standard voltage, current and other electric quantity signals to the control host, and the control host controls the controllable power supply and adjustable load to enter the parameter configuration and main circuit operation stage to simulate the inductive and capacitive reactive power generated by the load, which can be continuously adjusted;

[0138] 3) The controller of the intelligent capacitor assembly uploads the collected data to the control host, and automatically calculates the sampling error of the intelligent capacitor by comparing the intelligent capacitor sampling data with the signal of the standard source through the test program of the host, and then judges whether the sampling precision and sensitivity of the controller are qualified.

[0139] Taking measurement accuracy as an example: when the power factor angle When the power factor angle changes in the range of -30°~+30°, the controller power factor measurement accuracy should be 1.5%; when the voltage sampling input value is in the range of 80%~120% rated value, and the current sampling input value is in the range of 10%~100% rated value, the controller voltage and current measurement accuracy should be ±1%. When the reactive current value and reactive power change in the range of 10%~90% rated value, the controller reactive current and reactive power measurement accuracy should be ±2.5%.

[0140] 4) Detect the reactive power compensation function of the compensation reactive power compensation module:

[0141] Through the standard electric quantity signal of the standard source, the controllable power source is controlled to cooperate with the adjustable load on the load side, the reactive power deficiency change of the main circuit is simulated, the actual switching logic and the theoretical logic of the controller of the intelligent capacitor assembly are detected, whether the reactive power compensation logic is normal is judged; if it is normal, the next step is performed, otherwise the unqualified subitem of this detection is sent to the control host.

[0142] Through repeated switching, whether it meets the allowable error range is judged, the injected current of the intelligent capacitor assembly can be collected by an oscilloscope; according to JBT 9663-2013 "Low-voltage reactive power compensation controller execution standard", the action error should not exceed the allowable error listed in the following table.

[0143] Control physical quantity Allowable error Reactive power ±5％ Reactive current ±5％ Power factor ±2.0％ Voltage ±2.0％ Overvoltage protection ±2.0％

[0144] If the switching error is within the allowable range, the next detection content is performed, otherwise the unqualified subitem of this detection is sent to the control host.

[0145] 5) Protection function of reactive power compensation:

[0146] The signal of the standard source can be sent by the host control, and the controllable power source and the adjustable load are controlled at the same time, according to the set protection parameters, the main circuit outputs different voltages and currents, and the protection functions of the controller and the reactive power compensation module such as overvoltage, undervoltage, open phase, voltage over-harmonic, current over-harmonic, etc. are tested.

[0147] If the detection of this type is within the qualified range, the next detection content is performed, otherwise the unqualified subitem of this detection is sent to the control host.

[0148] 6) Protocol compliance test

[0149] The control host controls the fusion terminal and the intelligent capacitor assembly, and automatically performs the protocol test according to the related protocol, and one-key performs the telemetry, remote signaling, remote control, parameter setting, query, real-time data, etc. Test protocol compliance, judge whether it is qualified.

[0150] In this embodiment, the intelligent capacitor and the fusion terminal mainly use the modbus communication protocol, which is established on the basis of the Modbus communication protocol, and uses the Modbus-RTU mode to transmit data. 8-bit data bits are used without checking, and a half-duplex communication mode of master-slave structure is used. In the communication test process of this embodiment, the intelligent capacitor assembly is used as a slave, and the communication test between the intelligent fusion terminal and the intelligent capacitor is controlled by the control host console of the detection platform, and the establishment and release of the communication link are controlled by the information frame sent by the fusion terminal. The communication command is sent from the control device to the receiving device (slave), the slave machine meeting the corresponding address code receives the communication command, and returns the required information or performs the corresponding action according to the function code, if the CRC error, no information is returned.

[0151] If the detection is within the qualified range, the next step is performed, otherwise the unqualified sub-item of the detection is sent to the control host.

[0152] Based on the above detection results, the control host automatically generates a detection report for each detected intelligent capacitor assembly. Only when each item is within the qualified range, the detection report is qualified. If there is an unqualified detection sub-item, the detection report is unqualified.

[0153] In an optional embodiment, the sub-evaluation indicators of the actual test evaluation indicator β can represent acquisition error, reactive power compensation, protection, protocol testing, etc., and are respectively represented by β1, β2, β3, and β4, with a weight of 25% for each.

[0154] That is, β = 25% β1 + 25% β2 + 25% β3 + 25% β4

[0155] Step D: The comprehensive evaluation indicator f of the batch detection equipment represents the quality control level of the entire batch of intelligent capacitor group reactive power compensation equipment. f is composed of the evaluation indicator α representing virtual simulation and the evaluation indicator β representing actual test, with a weight of 20% and 80%, respectively.

[0156] That is, f = 20% α + 80% β

[0157] Step E: For special application conditions, the suitability of the batch of intelligent capacitors in the application scenario can be tested. In this embodiment, the specific application scenario is the running stability and collaborative compensation function of multiple intelligent capacitor groups and SVG in collaborative compensation of reactive power. Virtual simulation mode is used for verification. If the verification fails, the application result of this condition can be sent to the control host to generate a special test report.

[0158] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be in the form of a computer program product implemented on one or more computer usable storage media containing computer usable program code (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.).

[0159] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more computer-readable media. Figure 1 one or more computer-readable media.

[0160] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more computer-readable media. Figure 1 one or more computer-readable media.

[0161] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more computer-readable media. Figure 1 one or more computer-readable media.

[0162] In this description, references to "one embodiment", "an example", "certain examples” etc. mean that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of an item in various places in this specification are not necessarily referring to the same embodiment or example. Furthermore, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0163] Finally, it should be noted that the above-mentioned embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the same. Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments described above can be modified or equivalent replaced without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be included in the protection scope of the present application.

Claims

1. A reactive power compensation module detection and evaluation system, characterized in that: include: A virtual simulation platform is used to construct a simulated reactive power compensation module; wherein, the simulated reactive power compensation module is obtained by simulating the capacitive characteristic of the actual reactive power compensation module in the virtual simulation platform; Standard source, used to provide standard signals of voltage and current; A controllable power supply is used to receive control instructions from the control host, generate voltage and current under various working conditions according to the received control instructions, and supply them to the adjustable load; Adjustable load, used to receive control instructions from the control host, and cooperate with the controllable power supply according to the received control instructions to simulate various operating conditions; Fusion terminal, used for communication between actual reactive power compensation module and control host; The control host is used to send control instructions to the controllable power supply according to the standard signal provided by the standard source, so as to control the controllable power supply to generate voltage and current under various working conditions; and send control instructions to the adjustable load to control the adjustable load to operate under corresponding different working conditions; the control host obtains the relevant data corresponding to each actual reactive power compensation module under different working conditions through the fusion terminal, and determines the first evaluation result of each actual reactive power compensation module under real test based on the relevant data of each actual reactive power compensation module; the control host is also used to receive the relevant data of each simulated reactive power compensation module under different working conditions, and determine the second evaluation result of each simulated reactive power compensation module under the simulation environment based on the relevant data of each simulated reactive power compensation module; the control host determines the final evaluation result of the actual reactive power compensation module based on the first evaluation result, the second evaluation result, and the preset weights corresponding to the first evaluation result and the second evaluation result respectively; Wherein, the controllable power supply and the adjustable load constitute a main circuit for detecting and evaluating the actual reactive power compensation module; The capacitive characteristic of the actual reactive compensation module is simulated in a virtual simulation platform to obtain the simulated reactive compensation module, including: obtaining actual operating electrical quantity data of the actual reactive compensation module; wherein the actual operating electrical quantity data includes current, voltage and power factor; inputting the actual operating electrical quantity data into a pre-trained capacitive characteristic quantity identification model, and the capacitive characteristic quantity identification model outputs the capacitive characteristic quantity corresponding to the reactive compensation module; wherein the capacitive characteristic quantity identification model is constructed and trained based on a deep neural network; and based on the output capacitive characteristic quantity, constructing a simulated reactive compensation module in a simulation environment.

2. The reactive power compensation module detection and evaluation system according to claim 1, characterized in that: The control host is specifically used for: Acquire a standard signal from the standard source; Controlling the controllable power supply to output the main circuit voltage and current corresponding to the standard signal, and obtaining the main circuit voltage and current data detected by the actual reactive power compensation module; wherein the main circuit voltage and current data detected by the actual reactive power compensation module are collected by the collection component of the actual reactive power compensation module and sent to the control host through the controller of the actual reactive power compensation module; The main circuit voltage and current data detected by the actual reactive power compensation module are compared with the main circuit voltage and current corresponding to the standard signal, and the sampling error of the actual reactive power compensation module is calculated. The sampling accuracy sensitivity evaluation result of the actual reactive power compensation module is determined based on the sampling error.

3. The reactive power compensation module detection and evaluation system according to claim 2, characterized in that: The control host is further configured to: Acquire a standard signal from the standard source; Control the controllable power supply to output the main circuit voltage and current corresponding to the standard signal; wherein the standard signal is a signal simulating the change of reactive power shortage in the main circuit; Obtain the actual switching logic of the actual reactive power compensation module when the reactive power shortage in the main circuit changes. Based on the actual switching logic and the theoretical logic, determine whether the reactive power compensation logic of the actual reactive power compensation module is normal. Through repeated switching, determine whether the current injected by the actual reactive power compensation module meets the allowable error range. The reactive compensation error evaluation result is determined based on the reactive compensation logic judgment result and the current error judgment result.

4. The reactive power compensation module detection and evaluation system according to claim 3, characterized in that: The control host is further configured to: Acquire a standard signal from the standard source; By controlling the controllable power supply and adjustable load, and according to the set protection parameters, the main circuit outputs different voltages and currents, the protection function of the actual reactive power compensation module is tested, and the protection function evaluation results are obtained.

5. The reactive power compensation module detection and evaluation system according to claim 4, characterized in that: The control host is further configured to: Acquire a standard signal from the standard source; The control fusion terminal and the actual reactive power compensation module automatically perform protocol compliance tests according to the corresponding protocols to obtain protocol compliance evaluation results.

6. The reactive power compensation module detection and evaluation system according to claim 5, characterized in that: The control host is further configured to: Numbering each reactive module in the simulated reactive compensation module; Set different voltage levels and corresponding current levels respectively; Under different voltage levels and corresponding current levels, the zero-point switching and reactive module combination control characteristics of the simulated reactive compensation module are tested respectively, and the zero-point switching evaluation results and the reactive module combination control evaluation results are obtained.

7. The reactive power compensation module detection and evaluation system according to claim 6, characterized in that: The control host is further configured to: Multiplying the sampling accuracy sensitivity evaluation result, the reactive power compensation error evaluation result, the protection function evaluation result, and the specification compliance evaluation result by corresponding weights, and summing the results to obtain a first evaluation result; Multiplying the zero point switching evaluation result and the reactive module combination control evaluation result by corresponding weights respectively, and summing the results to obtain a second evaluation result; The first evaluation result and the second evaluation result are multiplied by the corresponding weights respectively and then summed to obtain a final evaluation result.

8. The reactive power compensation module detection and evaluation system according to claim 7, characterized in that: The weights of the sampling accuracy sensitivity evaluation results, reactive power compensation error evaluation results, protection function evaluation results, and specification compliance evaluation results are all 25%; The weights of the zero point switching evaluation results and the reactive module combination control evaluation results are both 50%; The weights corresponding to the first evaluation result and the second evaluation result are 80% and 20% respectively.

9. A reactive power compensation module detection and evaluation method, characterized in that: The reactive power compensation module detection and evaluation system according to any one of claims 1 to 8 is implemented, comprising: Determine a simulated reactive power compensation module; wherein, the simulated reactive power compensation module is obtained by simulating the capacitive characteristic of the actual reactive power compensation module in a virtual simulation platform; According to the standard signal provided by the standard source, control instructions are sent to the controllable power supply to control the controllable power supply to generate voltage and current under various working conditions; Send control instructions to the adjustable load to control the adjustable load to operate under corresponding different working conditions; Obtain relevant data corresponding to each actual reactive power compensation module under different working conditions through the fusion terminal, and determine a first evaluation result of each actual reactive power compensation module under actual testing based on the relevant data of each actual reactive power compensation module; Receiving relevant data of each simulated reactive power compensation module under different working conditions, and determining a second evaluation result of each simulated reactive power compensation module under the simulation environment based on the relevant data of each simulated reactive power compensation module; A final evaluation result of the actual reactive power compensation module is determined based on the first evaluation result, the second evaluation result, and the preset weights corresponding to the first evaluation result and the second evaluation result respectively.

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