A current waveform measurement and analysis system, method and medium for a high-voltage reactive power compensation controller

Abstract

The present invention relates to the field of reactive compensation controller measurement technology, and discloses a current waveform measurement and analysis system, method and medium of a high-voltage reactive compensation controller, including a current monitoring module, which monitors the voltage signal and current signal of the secondary side of all transformers connected to the reactive compensation controller, converts the voltage signal and the current signal into digital processing input to the main control chip of the reactive compensation controller, and outputs the data in the form of waveform. The present invention can more accurately capture the phase difference between the current lagging behind the voltage by using a multi-level threshold, which helps to accurately identify the capacitive current, avoid the phenomenon that the controller misjudges the capacitive current as the inductive current, and can reduce the probability of misjudgment and missed judgment, ensuring the accuracy of the system response.

Description

Technical Field

[0001] The invention relates to the technical field of reactive power compensation controller measurement, and in particular to a current waveform measurement and analysis system, method and medium for a high-voltage reactive power compensation controller. Background Art

[0002] At present, a reactive power compensation device, such as a synchronous phase condenser, a capacitor bank or a static VAR compensator (SVC), is often installed at a centralized node in the power system to provide unified reactive power compensation for the node and multiple transformers connected thereto.

[0003] When there is a single large load in the power system and the system is shut down, if the reactive compensation capacitors are still running, the transformer secondary current will be mainly composed of the current generated by these capacitors. The capacitors will generate capacitive current in the AC circuit, and since the active current is approximately zero, this current may cause the controller to be unable to accurately distinguish between pure capacitive current and inductive current. If the controller mistakenly judges the capacitive current as inductive current, it will continue to input capacitors to cause overcompensation in the power grid, that is, too much reactive power in the power grid will cause the voltage in the power grid to rise, which may cause damage to the power grid equipment. At the same time, too much reactive power flowing in the power grid will increase power loss and reduce power grid efficiency.

[0004] To this end, the present invention provides a current waveform measurement and analysis system, method and medium for a high-voltage reactive power compensation controller. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a current waveform measurement and analysis system, method and medium for a high-voltage reactive power compensation controller, so as to optimize the current waveform measurement of the reactive power compensation controller, so that the high-voltage reactive power compensation controller can more accurately distinguish between pure capacitive current and inductive current, thereby ensuring the accuracy and reliability of the controller.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a current waveform measurement and analysis system of a high-voltage reactive power compensation controller, comprising:

[0007] The current monitoring module monitors the voltage and current signals on the secondary side of all transformers connected to the reactive power compensation controller, converts the voltage and current signals into digital signals and inputs them into the main control chip of the reactive power compensation controller for digital processing, and outputs the data in the form of waveforms;

[0008] The parameter calculation module sets the initial sampling period of the collected current waveform, obtains the sample data of the voltage and current signals within one period, and calculates the phase difference between the current and the voltage;

[0009] The threshold adjustment module sets a multi-level capacitive threshold, starts with the minimum value of the first level capacitive threshold from -90°, gradually increases the maximum value of the phase difference, to generate multiple phase difference intervals, sets the number of intervals n of different levels of capacitive thresholds, sets the index i of the current interval, and sets an increment Δθ, wherein the increment Δθ represents the increase in the maximum value of the phase difference of each interval, and obtains the interval range θ of each level of capacitive threshold i =-90°+i×Δθ, the transformer whose phase difference falls into the first-level capacitive threshold is marked as a high-load node, and the judgment level and sampling period of its capacitive threshold are adjusted;

[0010] The strategy judgment module feeds back all high-load nodes to the main control chip of the reactive power compensation controller to control the working state of the reactive power compensation controller.

[0011] In some embodiments, a preset sampling cycle number is set for a high-load node. Within a subsequent preset sampling cycle number, the high-load node executes the determination of the next level of capacitive threshold. When the high-load node falls into the capacitive threshold of the current execution level again within the preset sampling cycle number, the preset sampling cycle number of the high-load node is refreshed and recalculated, and the determination of the next level of capacitive threshold is executed again, until the phase difference of the high-load node does not fall into the capacitive threshold of the corresponding level within the preset sampling cycle number.

[0012] In some embodiments, when the phase difference of the high-load node does not fall within the capacitive threshold of the corresponding level within a preset number of sampling cycles, the capacitive threshold judgment level of the high-load node is reduced by one level until it is restored to the judgment state of the first-level capacitive threshold.

[0013] In some implementations, the sampling period of the high-load node is adjusted to change the initial sampling period T og Divide by the proportional factor k of the shortened period to get the adjusted high-load sampling period The proportional factor k>1, so that the sampling times of the high-load node in one sampling cycle remain unchanged and the sampling frequency is shortened.

[0014] In some embodiments, starting from the second level of the capacitive threshold, the compensation coefficient C corresponding to the different levels of the capacitive threshold is set. t , calculate the minimum acquisition cycle time T min The actual acquisition cycle time T actual The two are compared in size and corresponding compensation operations are performed according to the comparison results.

[0015] In some embodiments, the minimum acquisition cycle duration T is calculated. min The actual acquisition cycle time T actual The specific method is: by obtaining the preset sampling cycle number Mp and the initial sampling period T og , get the minimum collection cycle duration Combined with the high load sampling period T new Calculate the actual acquisition cycle time T actual =M p ×T new , if the minimum acquisition cycle length T min Greater than the actual acquisition cycle length T actual , it means that time compensation is needed.

[0016] In some embodiments, the specific method of time compensation is: using the minimum acquisition cycle length T min The actual acquisition cycle time T actual The difference is calculated to obtain a compensation time period, during which the high-load node still determines the phase difference according to the capacitive threshold of the current level until the compensation time period is exceeded.

[0017] The present invention also provides the following technical solution: a current waveform measurement and analysis method of a high-voltage reactive power compensation controller, comprising the following steps:

[0018] Monitor the voltage and current signals on the secondary side of all transformers connected to the reactive power compensation controller, convert the voltage and current signals into digital signals and input them into the main control chip of the reactive power compensation controller, and output the data in the form of waveforms;

[0019] The collected current waveform is set to an initial sampling period, and sample data of the voltage and current signals within one period are obtained, and the phase difference between the current and the voltage is calculated;

[0020] Set multiple levels of capacitive thresholds, start with the minimum value of the first level capacitive threshold from -90°, gradually increase the maximum value of the phase difference to generate multiple phase difference intervals, set the number of intervals n of different levels of capacitive thresholds, set the index i of the current interval, and set an increment Δθ, the increment Δθ represents the increase in the maximum value of the phase difference of each interval, and obtain the interval range θ of each level of capacitive threshold i =-90°+i×Δθ, the transformer whose phase difference falls into the first-level capacitive threshold is marked as a high-load node, and the judgment level and sampling period of its capacitive threshold are adjusted;

[0021] All high-load nodes are fed back to the main control chip of the reactive power compensation controller to control the working state of the reactive power compensation controller.

[0022] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the current waveform measurement and analysis system of the above-mentioned high-voltage reactive power compensation controller.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] Firstly, the present invention can more precisely capture the phase difference between current and voltage by using multi-level thresholds, which helps to accurately identify capacitive current and avoid the phenomenon that the controller misjudges capacitive current as inductive current. By refining the threshold, the probability of misjudgment and missed judgment can be reduced, ensuring the accuracy of system response.

[0025] Secondly, the present invention can automatically adjust the threshold and sampling cycle frequency according to the real-time monitoring results. When a high-load node is identified, the system can respond to changes in power load more sensitively and accurately by increasing the capacitive threshold judgment level and shortening the sampling frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a current waveform measurement and analysis system of a high-voltage reactive power compensation controller of the present invention;

[0027] Figure 2 The present invention is a flowchart of a method for measuring and analyzing a current waveform of a high-voltage reactive power compensation controller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0030] See also Figure 1The present invention provides a current waveform measurement and analysis system for a high-voltage reactive power compensation controller, the system comprising a current monitoring module, a parameter calculation module, a threshold adjustment module and a strategy judgment module, the current monitoring module comprising a voltage transformer (PT) and a current transformer (CT) connected to the secondary side of all transformer loads connected to the reactive power compensation controller, the voltage transformer and the current transformer are electrically connected to the high-voltage reactive power compensation controller, to realize the monitoring of the voltage and current signals on the secondary side of all transformers, and adopt a unique The voltage and current signals are sampled at the same time by using a clock or synchronous trigger technology, and the channels of the data acquisition equipment are sampled synchronously to avoid phase errors caused by time offsets. The noise and high-frequency interference components in the signal are removed by a digital filter to ensure the quality of the signal. The voltage and current signals are input to the main control chip of the reactive power compensation controller through an A / D converter for digital processing, and displayed as waveforms through an oscilloscope or data acquisition system. The parameter calculation module includes the identification of the power frequency, determining the power frequency of the power grid (usually 50Hz or 60Hz), and calculating the sampling period of the current waveform according to the power frequency f. For example, for a 50Hz power frequency, the cycle is 20ms, and for a 60Hz power frequency, the cycle is 16.67ms, and the sample data of the voltage and current signals within a cycle are obtained, and the phase difference between the two is calculated through the voltage and current signal sample data; the parameter calculation module sets the initial sampling cycle of the collected current waveform, and obtains the sample data of the voltage and current signals within a cycle, and calculates the phase difference between the current and the voltage; the threshold adjustment module sets the multi-level capacitive threshold from narrow to wide. When the phase difference detected by the secondary side of the transformer falls into the narrowest After the first-level capacitive threshold is reached, it means that there may be a shutdown of large-load equipment in the transformer system. The transformer that falls into the first-level capacitive threshold is marked as a high-load node. Therefore, it is necessary to increase the judgment level of its capacitive threshold and shorten the sampling frequency. The purpose is to be able to manage transformers with large loads more sensitively and frequently, and reduce the risk of misjudgment of capacitive current; the strategy judgment module feeds back all high-load nodes to the main control chip of the reactive compensation controller. The main control chip can control the reactive compensation controller to judge the current of the transformer as capacitive current and not compensate when it senses the current of the high-load node.

[0031] In the current waveform, the capacitive load causes the current to lead the voltage phase by 90 degrees, that is, the phase difference is negative 90 degrees, which is also a typical manifestation of the capacitance characteristic in the AC circuit. According to the above, the setting method of the multi-level capacitive threshold is to start the minimum value of the first-level capacitive threshold from -90°, and gradually increase the maximum value of the phase difference to generate multiple phase difference intervals. Therefore, in order to obtain the interval range θ of each level of capacitive threshold, it is necessary to set the number of intervals n of different levels of capacitive thresholds, set the index i of the current interval (starting from 1), and set an increment Δθ, the increment Δθ represents the increase in the maximum value of the phase difference of each interval, and obtain the interval range θ of each level of capacitive threshold. i =-90°+i×Δθ. For example, if there are 5 intervals and the increment Δθ=5°, then:

[0032] The range of the first-level capacitive threshold is: [-90°, -85°]

[0033] The range of the secondary capacitive threshold is: [-90°, -80°]

[0034] The range of the three-level capacitive threshold is: [-90°, -75°]

[0035] The range of the four-level capacitive threshold is: [-90°, -70°]

[0036] The range of the five-level capacitive threshold is: [-90°, -65°]

[0037] By adjusting the increment Δθ and the number of intervals n, the phase difference range can be flexibly divided to meet different system requirements.

[0038] After calculating the phase difference between the current and the voltage of each transformer, the transformer falling into the first-level capacitive threshold is marked as a high-load node, and the preset sampling cycle number of the high-load node is set. In the subsequent preset sampling cycle number, the high-load node executes the judgment of the next-level capacitive threshold. When the high-load node falls into the capacitive threshold of the current execution level again within the preset sampling cycle number, the preset sampling cycle number of the high-load node is refreshed and recalculated, and the judgment of the next-level capacitive threshold is executed again. For example, the preset sampling cycle number is set to 10 cycles, when a transformer is marked as a high-load node, its subsequent phase difference will execute the judgment of the secondary capacitive threshold [-90°, -80°] within 10 cycles. If the phase difference of the high-load node in the 8th cycle is -81°, it falls into the secondary capacitive threshold. Its subsequent phase difference will re-execute the judgment of the third-level capacitive threshold [-90°, -75°] within 10 cycles until the phase difference of the high-load node does not fall into the capacitive threshold of the corresponding level within the preset number of sampling cycles, and then the judgment state of the first-level capacitive threshold is restored.

[0039] Furthermore, when the phase difference of the above-mentioned high-load node does not fall within the capacitive threshold of the corresponding level within the preset number of sampling cycles, it can also be gradually restored to the upper capacitive threshold. The specific method is: when the transformer is marked as a high-load node, and the phase difference of the high-load node does not fall within the capacitive threshold of the corresponding level within the preset number of sampling cycles, the capacitive threshold judgment level of the high-load node is reduced by one level until it is restored to the judgment state of the first-level capacitive threshold. This gradual adjustment can avoid drastic changes in the phase difference threshold setting, can smooth out the inaccuracy caused by measurement errors or temporary fluctuations to a certain extent, reduce misjudgment and possible misoperation, and can evaluate the response and performance of the system during the transition process of each stage, make timely adjustments, and allow more detailed monitoring and analysis during the recovery process.

[0040] Furthermore, for a transformer that falls within the primary capacitive threshold, the sampling frequency also needs to be adjusted after it is marked as a high-load node. When the phase difference between the current lag and the voltage obtained on the secondary side of the transformer falls within the primary capacitive threshold and is marked as a high-load node, the sampling period of the high-load node is adjusted, and the initial sampling period T og Divide by the proportional factor k of the shortened period to get the adjusted high-load sampling period Among them, the proportional factor k>1, so that the number of sampling times of the high-load node in a sampling cycle remains unchanged and the sampling frequency is shortened, so that the high-load node will perform the same number of samplings in a shorter time compared to the initial sampling frequency. For high-load nodes in a high-load environment, the load changes more frequently and the amplitude may be larger. The higher sampling frequency enables the system to respond faster and record these changes, helping to identify and analyze transient phenomena, so as to take timely response measures.

[0041] Specifically, the present invention is aimed at judging the current on the secondary side of the transformer when the circuit system is under heavy load and shut down. It is mainly achieved by setting a multi-level threshold for the phase difference between the current lagging behind the voltage in the current waveform, and adjusting the threshold and sampling frequency according to the specific transformer. When the phase difference monitored on the secondary side of the transformer falls into the narrowest first-level capacitive threshold, it means that there may be a shutdown of a large-load device in the transformer system. The transformer falling into the first-level capacitive threshold is marked as a high-load node, so it is necessary to increase the judgment level of its capacitive threshold and shorten the sampling frequency. The use of multi-level thresholds can more finely capture the phase difference between the current lagging behind the voltage, which helps to accurately identify the capacitive current and avoid the phenomenon that the controller misjudges the capacitive current as the inductive current. By refining the threshold, the probability of misjudgment and missed judgment can be reduced, ensuring the accuracy of the system response. The system can automatically adjust the threshold and sampling cycle frequency according to the real-time monitoring results. When a high-load node is identified, the system can respond to the change of the power load more sensitively and accurately by increasing the capacitive threshold judgment level and shortening the sampling frequency.

[0042] It should be noted that when the high-load node executes the high-load sampling period T new After that, the number of sampling times in a sampling cycle remains unchanged and the sampling frequency is shortened, which means that for high-load nodes, a detection cycle will take a shorter time, and the transformer in the high-load node state needs to determine the corresponding level of capacitance threshold within the preset sampling cycle number (taking 10 cycles as an example). When the high-load sampling cycle T new Compared with the initial sampling period T og After the time is shortened, although the number of acquisitions is the same, the shorter sampling time will make the data volume for the capacitive threshold judgment insufficient. Therefore, it is necessary to start from the second-level capacitive threshold and set the compensation coefficient C corresponding to different levels of capacitive thresholds. t , by obtaining the preset sampling period number Mp and the initial sampling period T og , get the minimum collection cycle duration Combined with the high load sampling period T new Calculate the actual acquisition cycle time T actual =M p ×T new , if the minimum acquisition cycle length T min Greater than the actual acquisition cycle length T actual , it means that time compensation is required, and the minimum acquisition cycle length T is used min The actual acquisition cycle time T actualThe difference is calculated to obtain the compensation time. During the compensation time, the high-load node still determines the phase difference according to the capacitive threshold of the current level until the compensation time is exceeded, so as to ensure that the capacitive threshold determination data of the high-load node is sufficient when the sampling period is shortened, and maintain the stability and reliability of the determination. For example, the initial sampling period T is set og The high load sampling period is 20ms. new The preset sampling period is 14ms. p =10, the compensation factor C t The initial value is 1.5. The compensation factor C increases with each increase in the capacitive threshold level. t A decrease of 0.1 may form the following table:

[0043]

[0044]

[0045] See also Figure 2 The present invention provides a current waveform measurement and analysis method for a high-voltage reactive power compensation controller, the method comprising the following steps:

[0046] Monitor the voltage and current signals on the secondary side of all transformers connected to the reactive power compensation controller, convert the voltage and current signals into digital signals and input them into the main control chip of the reactive power compensation controller, and output the data in the form of waveforms;

[0047] The collected current waveform is set to an initial sampling period, and sample data of the voltage and current signals within one period are obtained, and the phase difference between the current and the voltage is calculated;

[0048] Set multi-level capacitive thresholds, mark the transformer whose phase difference falls into the first-level capacitive threshold as a high-load node, and adjust the judgment level and sampling period of its capacitive threshold;

[0049] All high-load nodes are fed back to the main control chip of the reactive power compensation controller to control the working state of the reactive power compensation controller.

[0050] The embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. The embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part, and / or installed from a removable medium. When the computer program is executed by the central processing unit, the above functions defined in the method of the present application are executed. It should be noted that the computer-readable medium mentioned above in the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, a system, device or device of an electrical, magnetic, optical, electromagnetic, infrared segment, or semiconductor, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wire segments, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disk read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless segments, wire segments, optical cables, RF, etc., or any suitable combination of the above.

[0051] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0052] Those skilled in the art should understand that the above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A current waveform measurement and analysis system for a high-voltage reactive power compensation controller, characterized in that: include: The current monitoring module monitors the voltage and current signals on the secondary side of all transformers connected to the reactive power compensation controller, converts the voltage and current signals into digital signals and inputs them into the main control chip of the reactive power compensation controller for digital processing, and outputs the data in the form of waveforms; The parameter calculation module sets the initial sampling period of the collected current waveform, obtains the sample data of the voltage and current signals within one period, and calculates the phase difference between the current and the voltage; The threshold adjustment module sets a multi-level capacitive threshold, starts with the minimum value of the first-level capacitive threshold from -90°, and gradually increases the maximum value of the phase difference to generate multiple phase difference intervals, sets the number of intervals n of different levels of capacitive thresholds, sets the index i of the current interval, and sets an increment Δθ, wherein the increment Δθ represents the increase in the maximum value of the phase difference of each interval, and obtains the interval range θ of each level of capacitive threshold i =-90°+i×Δθ, the transformer whose phase difference falls into the first-level capacitive threshold is marked as a high-load node, and the judgment level and sampling period of its capacitive threshold are adjusted; The strategy judgment module feeds back all high-load nodes to the main control chip of the reactive power compensation controller to control the working state of the reactive power compensation controller.

2. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 1 is characterized in that: A preset sampling cycle number is set for a high-load node. Within the subsequent preset sampling cycle number, the high-load node executes the judgment of the next level of capacitive threshold. When the high-load node falls into the capacitive threshold of the current execution level again within the preset sampling cycle number, the preset sampling cycle number of the high-load node is refreshed and recalculated, and the judgment of the next level of capacitive threshold is executed again, until the phase difference of the high-load node does not fall into the capacitive threshold of the corresponding level within the preset sampling cycle number.

3. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 2 is characterized in that: When the phase difference of the high-load node does not fall within the capacitive threshold of the corresponding level within the preset sampling cycle number, the capacitive threshold judgment level of the high-load node is reduced by one level until it is restored to the judgment state of the first-level capacitive threshold.

4. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 3 is characterized in that: The sampling period of the high-load node is adjusted to og Divide by the proportional factor k of the shortened period to get the adjusted high-load sampling period The proportional factor k>1 makes the sampling times of the high-load node in one sampling period remain unchanged and the sampling frequency is shortened.

5. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 4 is characterized in that: Starting from the second level capacitive threshold, set the compensation coefficient C corresponding to different levels of capacitive thresholds. t , calculate the minimum acquisition cycle time T min The actual acquisition cycle time T actual The two are compared in size and corresponding compensation operations are performed according to the comparison results.

6. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 5, characterized in that: Calculate the minimum acquisition cycle time T min The actual acquisition cycle time T actual The specific method is: by obtaining the preset sampling cycle number M p and the initial sampling period T og , get the minimum collection cycle duration Combined with the high load sampling period T new Calculate the actual acquisition cycle time T actual =M p ×T new , if the minimum acquisition cycle length T min Greater than the actual acquisition cycle length T actual , it means that time compensation is needed.

7. The current waveform measurement and analysis system of a high-voltage reactive power compensation controller according to claim 6 is characterized in that: The specific method of time compensation is: using the minimum acquisition cycle length T min The actual acquisition cycle time T actual The difference is calculated to obtain a compensation time period, during which the high-load node still determines the phase difference according to the capacitive threshold of the current level until the compensation time period is exceeded.

8. A method for measuring and analyzing the current waveform of a high-voltage reactive power compensation controller, characterized in that: The steps include: Monitor the voltage and current signals on the secondary side of all transformers connected to the reactive power compensation controller, convert the voltage and current signals into digital signals and input them into the main control chip of the reactive power compensation controller, and output the data in the form of waveforms; The collected current waveform is set to an initial sampling period, and sample data of the voltage and current signals within one period are obtained, and the phase difference between the current and the voltage is calculated; Set multiple levels of capacitive thresholds, start with the minimum value of the first level capacitive threshold from -90°, gradually increase the maximum value of the phase difference to generate multiple phase difference intervals, set the number of intervals n of different levels of capacitive thresholds, set the index i of the current interval, and set an increment Δθ, the increment Δθ represents the increase in the maximum value of the phase difference of each interval, and obtain the interval range θ of each level of capacitive threshold i =-90°+i×Δθ, the transformer whose phase difference falls into the first-level capacitive threshold is marked as a high-load node, and the judgment level and sampling period of its capacitive threshold are adjusted; All high-load nodes are fed back to the main control chip of the reactive power compensation controller to control the working state of the reactive power compensation controller.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement a current waveform measurement and analysis system for a high-voltage reactive power compensation controller as described in any one of claims 1 to 7.

Images