Power quality control module function demand control method and device, and storage medium

Abstract

The invention discloses an electric energy quality control module function demand control method and device and a storage medium, and belongs to the technical field of electric energy quality control. Performing current distribution according to the load side reactive current vacancy demand, the harmonic current vacancy demand and the unbalanced current vacancy demand of the current demand period, and obtaining a function demand parameter of the next slip frequency period according to the distributed current and the total current vacancy demand; and under the constraint of the functional compensation current component upper limit, performing functional current compensation on the load in the power grid based on the reactive current vacancy demand, the harmonic current vacancy demand and the unbalanced current vacancy demand on the load side. The technical problems that an existing electric energy quality treatment scheme cannot completely adapt to the actual electric energy quality treatment requirement, and when the actual requirement does not conform to the capacity configuration of all the functions, the number of all the function modules can only be adjusted through power failure again can be solved.

Description

Technical Field

[0001] This invention relates to the field of power quality management technology, and in particular to a method, device and storage medium for controlling the functional demand of a power quality management module. Background Technology

[0002] Currently, power quality management devices widely used in low-voltage distribution networks mostly consist of parallel combinations of Static Var Generator (SVG), Advanced Static Var Generator (ASVG), Active Power Filter (APF), and Smart Power Conditioner (SPC) modules. These devices are used to solve common power quality problems in low-voltage power grids, such as low power factor, high harmonics, and three-phase current imbalance.

[0003] When designing a power quality management solution, it is necessary to use modules with different functions, and the number of modules needs to be configured according to the different compensation function capacities.

[0004] However, the main drawback mentioned above is that when users add or change the type of electrical equipment, if the inductive reactive power capacity demand, three-phase unbalanced capacity demand, and harmonic capacity demand change, and the redundancy is not large compared to the actual needs, for example, if the harmonic capacity demand increases, the three-phase unbalanced capacity demand decreases, and the total demand capacity remains unchanged, the only option is to shut down the power and replace the module type.

[0005] When designing new projects, electrical designers configure the capacity of each functional module based on 40% of the total transformer capacity. This cannot fully meet the actual needs of power quality management. If the actual needs do not match the capacity configuration of each function and exceed the design value, the only option is to restart the power supply, replace the number of functional modules, and adjust the capacity configuration. This means that the existing module capacity cannot be fully utilized. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, device and storage medium for controlling the functional demand of power quality management modules. This invention can solve the technical problem that existing power quality management schemes cannot fully adapt to the actual power quality management needs, and that when the actual demand does not match the configuration of each functional capacity, the only solution is to restart the power supply and replace the number of each functional module to make adjustments.

[0007] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0008] In a first aspect, the present invention provides a method for demand control of a power quality management module, comprising:

[0009] Acquire real-time transmission data and total rated current from the power quality management device;

[0010] Calculate the load-side reactive current deficit, harmonic current deficit, and unbalanced current deficit for the current demand cycle based on the real-time transmitted data.

[0011] Calculate the total current deficit demand based on the reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand on the load side of the current demand cycle.

[0012] When the total current deficit demand does not exceed the total rated current, the current is allocated according to the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand of the current demand cycle.

[0013] The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total current deficit demand.

[0014] The functional demand parameters are sent to each power quality management module of the power quality management device, and the upper limit of the functional compensation current component of each power quality management module is obtained based on the functional demand parameters and the rated current of each power quality management module.

[0015] Under the constraint of the upper limit of the functional compensation current component, functional current compensation is performed on the load in the power grid based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side.

[0016] Furthermore, it also includes:

[0017] When the total current deficit demand exceeds the total rated current, current is allocated based on a preset order of highest priority, second highest priority, and lowest priority. The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total rated current.

[0018] Furthermore, the calculation of the reactive current deficit demand on the load side includes:

[0019] ,

[0020] In the formula, ,

[0021] when hour, ,

[0022] ,

[0023] ,

[0024] ,

[0025] ,

[0026] ,

[0027] ,

[0028] ,

[0029] in, This is a collection of reactive current deficit requirements on the load side over a 24-hour period. Provide the reactive current demand set for the module output. For the first The module output reactive current demand per slip cycle. This indicates the reactive current demand output by the module during the first demand cycle. This indicates the reactive current demand of the module output during the first slip cycle. This is a collection of reactive current deficit demand on the grid side. For the first The grid-side reactive current deficit demand per slip cycle. This refers to the grid-side reactive current deficit demand during the first demand cycle. This represents the grid-side reactive current deficit demand during the first slip cycle. For the first The set of three-phase reactive current deficit demand on the grid side during each sampling period. , and respectively grid side Phase reactive current deficit demand collection, grid side Phase reactive current deficit demand collection and grid side Phase reactive current deficit demand set This refers to the reactive power deficit demand on the power grid side. for The set of three-phase voltages on the grid side at any given time. , and respectively grid side Phase voltage, grid side Phase voltage and grid side Phase voltage, This represents the current reactive power. This represents the current active power. For the target power factor, For the preset demand cycle, For the preset slip period, For the preset sampling period, The number of samples per unit demand period. This represents the number of slip cycles that have occurred within 24 hours.

[0030] The expression for the load-side harmonic current deficit requirement is as follows:

[0031] ,

[0032] In the formula, ,

[0033] when hour, ,

[0034] ,

[0035] ,

[0036] ,

[0037] ,

[0038] in, This represents the set of load-side harmonic current deficit requirements over a 24-hour period. Set the required harmonic current deficit for module output. This is the set of harmonic current deficit demand on the power grid side. For the first The 95% probability value of the harmonic current deficit required by the slip cycle module output. This represents the 95% probability value of the harmonic current deficit demand output by the first demand cycle module. For the first The root mean square value of the total harmonic current output by the module during each sampling period. The first output of the module The root mean square value of the subharmonic current content. For the first Harmonic current deficit demand on the grid side for one slip cycle (95% probability value) This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first demand cycle. This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first slip cycle. The first one detected by the module The root mean square value of the subharmonic current content. This is the root mean square value of the harmonic current content with a 95% probability detected by the module. For the first The root mean square value of the total harmonic current detected by the module during each sampling period. This is the root mean square value of the total harmonic current detected by the module during the first sampling period. This is the root mean square value of the total harmonic current detected by the module during the second sampling period;

[0039] The expression for the unbalanced current deficit requirement on the load side is as follows:

[0040] ,

[0041] In the formula, ,

[0042] ,

[0043] when hour, ,

[0044] ,

[0045] ,

[0046] ;

[0047] ,

[0048] ,

[0049] ,

[0050] ,

[0051] ,

[0052] ;

[0053] in, This represents the set of unbalanced current deficit requirements on the load side over a 24-hour period. This represents the set of maximum negative sequence current deficit requirements on the load side over a 24-hour period. This represents the set of maximum zero-sequence current deficit requirements on the load side over a 24-hour period. This is the set of zero-sequence current requirements for module output over 24 hours. This represents the set of zero-sequence current deficit demand on the power grid side over a 24-hour period. In the first The maximum zero-sequence current output within one slip cycle The maximum zero-sequence current output during the first demand cycle. The maximum zero-sequence current output during the first slip cycle, For the first The zero-sequence current output by the module during each sampling period. This represents the zero-sequence current output by the module during the first sampling period. This refers to the zero-sequence current output by the module during the second sampling period. For the 24-hour power grid side Zero-sequence current deficit requirement. This is the first zero-sequence current deficit requirement on the grid side within 24 hours. This is the second zero-sequence current deficit requirement on the grid side within 24 hours. For the first Zero-sequence current deficit during each sampling period This refers to the zero-sequence current deficit during the first sampling period. This refers to the zero-sequence current deficit during the second sampling period. This is the collection of three-phase zero-sequence currents on the grid side. For the power grid side Phase current, For the power grid side Phase current, For the power grid side Phase current, This represents the set of negative sequence current requirements output by the module over a 24-hour period. This represents the set of negative sequence current deficit demand on the power grid side over a 24-hour period. For the module in the The maximum negative sequence current output within one slip cycle. This is the maximum negative sequence current output by the module during the first demand cycle. This represents the maximum negative sequence current output by the module during the first slip cycle. For the first The negative sequence current output by the module during each sampling period This is the negative sequence current output by the module during the first sampling period. This refers to the negative sequence current output by the module during the second sampling period. In the first Maximum negative sequence current deficit within one slip cycle. This represents the maximum negative sequence current deficit during the first demand cycle. This represents the maximum negative sequence current deficit during the first slip cycle. For the first The set of negative sequence current deficits during each sampling period. This refers to the negative sequence current deficit during the first sampling period. This refers to the negative sequence current deficit during the second sampling period. For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current;

[0054] The expression for the total current deficit requirement on the load side is as follows:

[0055] ,

[0056] in, For the load side, the first within 24 hours Maximum total current deficit requirement of three phases during one slip cycle. For the load side, the first within 24 hours Reactive current deficit demand during one slip cycle. For the load side, the first within 24 hours Load-side unbalanced current deficit during each slip cycle For the load side, the first within 24 hours Load-side harmonic current deficit requirement during one slip cycle.

[0057] Furthermore, when the total current deficit demand does not exceed the total rated current, current is allocated according to the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand of the current demand cycle. The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total current deficit demand, including:

[0058] ,

[0059] ,

[0060] ,

[0061] in, , and These are the reactive power compensation current component, harmonic compensation current component, and three-phase current imbalance compensation current component of the current demand cycle module, respectively.

[0062] The functional demand parameters for the next slip cycle are obtained based on the allocated functional compensation current components and the total current deficit demand:

[0063] ,

[0064] ,

[0065] ,

[0066] in, This refers to reactive power demand parameters; For harmonic demand parameters; For unbalanced demand parameters;

[0067] The constraint in current allocation is that the current allocation for each demand must meet its demand amount, and the current allocation must not be less than the maximum current of each demand.

[0068] Furthermore, when the total current deficit exceeds the total rated current, current is allocated based on a preset order of highest priority, second-highest priority, and lowest priority. The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total rated current, including:

[0069] If the current demand deficit of the highest priority functional current in the current demand cycle is less than the total rated current, the highest priority functional current is allocated from the total rated current to obtain the total remaining current of the device after one allocation:

[0070] ,

[0071] The constraints are:

[0072] ,

[0073] When the total residual current of the device after one allocation is equal to 0, an alarm is triggered, and the functional demand parameters for the next slip cycle are 1, 0 and 0 respectively.

[0074] When the total residual current of the device allocated once is greater than 0, the second-highest priority functional current is allocated from the total residual current of the device allocated once, to obtain the total residual current of the device allocated twice:

[0075] Calculate the total residual current of the device after the two distributions:

[0076] ,

[0077] The constraints are:

[0078] ,

[0079] When the total residual current of the device after two distributions equals 0, an alarm is triggered. The functional demand parameters for the next slip cycle are as follows: , and 0;

[0080] When the total residual current of the device allocated twice is greater than 0, the lowest priority functional current is allocated from the total residual current of the device allocated twice.

[0081] The constraints are:

[0082] ,

[0083] The functional requirements parameters for the next slip cycle are as follows: , and ;

[0084] in, For the total rated current, The highest priority compensation current component allocated to the current demand cycle. The highest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the highest priority module in the current demand cycle. The total residual current of the device after one distribution. The second-highest priority compensation current component allocated for the current demand cycle. The second highest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the second-highest priority module in the current demand cycle. The total residual current of the device distributed twice. The lowest priority compensation current component allocated to the current demand cycle. The lowest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the lowest priority module in the current demand cycle.

[0085] Furthermore, it also includes:

[0086] When the highest priority function demand parameter is 1 and the total rated current cannot meet the highest priority shortfall demand, an alarm is triggered, and the number of power quality management modules is increased.

[0087] Secondly, the present invention provides a power quality management module functional demand control device, comprising:

[0088] The acquisition unit is used to acquire real-time transmitted data and total rated current of the power quality management device;

[0089] The first calculation unit is used to calculate the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand for the current demand cycle based on the real-time transmitted data.

[0090] The second calculation unit is used to calculate the total current deficit demand based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side of the current demand cycle.

[0091] The current distribution unit is used to distribute current according to the load-side reactive current deficit, harmonic current deficit, and unbalanced current deficit in the current demand cycle when the total current deficit demand does not exceed the total rated current.

[0092] The functional demand parameter calculation unit is used to obtain the functional demand parameters for the next slip cycle based on the allocated current and the total current deficit demand.

[0093] The upper limit calculation unit for the functional compensation current component is used to send the functional demand parameters to each power quality management module of the power quality management device, and to obtain the upper limit of the functional compensation current component of each power quality management module based on the functional demand parameters and the rated current of each power quality management module.

[0094] The compensation unit is used to perform functional current compensation on the load in the power grid based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side, under the constraint of the upper limit of the functional compensation current component.

[0095] Furthermore, the power quality management module also has reactive current compensation function, three-phase current imbalance compensation function, and harmonic current compensation function.

[0096] Thirdly, the present invention provides an electronic terminal, including a processor and a memory connected to the processor, wherein a computer program, real-time transmission data, calculation data and setting parameters are stored in the memory, and when the computer program is executed by the processor, the steps of the method described in any of the above are performed.

[0097] Fourthly, the present invention provides a computer-readable storage medium having a computer program, the real-time transmission data, the calculation data, and setting parameters stored thereon, wherein the computer program, when executed by a processor, implements the steps of any of the methods described above.

[0098] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0099] The power quality management module demand control method proposed in this invention involves the controller, after acquiring real-time transmission data from the power quality management device, calculating the reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand on the load side for the current demand cycle based on the real-time transmission data. It then calculates the total current deficit demand based on these three deficit demands. When the total current deficit demand does not exceed the total rated current, current is allocated according to the reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand on the load side for the current demand cycle. Finally, the next demand is determined based on the allocated current and the total current deficit demand. The functional demand parameter for one slip cycle is used to obtain the upper limit of the functional compensation current component. Under the constraint of the upper limit of the functional compensation current component, the functional current compensation of the load in the power grid is performed based on the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand. This can fully adapt to the actual power quality management needs. When the actual demand does not match the configuration of each functional capacity, such as exceeding the design value, the current can be allocated according to the capacity geometric allocation algorithm based on priority ranking, thereby meeting the actual power quality management needs without power outage. Attached Figure Description

[0100] Figure 1 A flowchart A illustrates a demand control method for a power quality management module, provided in an embodiment of the present invention.

[0101] Figure 2 The main flowchart of the controller control software provided in the embodiment of the present invention;

[0102] Figure 3 Flowchart B shows a method for demand control of a power quality management module provided in an embodiment of the present invention.

[0103] Figure 4 This is a schematic diagram illustrating the relationship between slippage period and demand period provided in an embodiment of the present invention;

[0104] Figure 5 This is a schematic diagram of the power quality management device provided in an embodiment of the present invention.

[0105] Figure 6 This is a circuit block diagram of a power quality management module provided in an embodiment of the present invention;

[0106] Figure 7 A software control block diagram provided for embodiments of the present invention;

[0107] Figure 8 This is a block diagram of the functional demand parameter model provided in an embodiment of the present invention. Detailed Implementation

[0108] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0109] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0110] Before detailing the demand control method of the power quality management module disclosed in this application, a brief explanation of the power quality management module mentioned in this application is provided. The principle block diagram of the power quality management module mentioned in this application is as follows: Figure 6 As shown, it includes an inverter, an LCL circuit, a grid-connected relay circuit, a DC power supply, a main control board, and a display circuit. Its principle block diagram is completely consistent with the circuit principle block diagrams of SVG, ASVG, SPC, and APF. Since the circuit principle block diagrams of SVG, ASVG, SPC, and APF are conventional existing technologies, their internal current flow and signal transmission processes will not be described in detail here.

[0111] In addition, a comparison of SVG, ASVG, SPC, and APF:

[0112] 1. LCL circuit parameters:

[0113] The LCL circuit parameters are the same in the SVG, ASVG, and SPC modules, but the LCL circuit parameters in the APF module are different from those in other modules. The LCL circuit parameters in the SVG, ASVG, and SPC modules can also be adopted from those in the APF module, but this would increase the cost by approximately 10-20 yuan. If the LCL parameters are standardized, it would allow for unified inventory preparation for mass production.

[0114] LCL is not a word that can be directly spelled, but an abbreviation of the first letters of three English words. The full name is Inductor-Capacitor-Inductor. LCL consists of "two inductors (L) and one capacitor (C)", and its letter order is consistent with the connection order of circuit components.

[0115] 2. Digital Signal Processor (DSP) chip selection:

[0116] The DSP chip used on the main control board of the SVG, ASVG, and SPC modules is the TMS320F28335 from TI; the DSP chip used in the APF module is the TMS320F28388 from TI.

[0117] The TMS320F28335 uses a single-core C28x CPU with a clock speed of 150MHz and is equipped with a 32-bit floating-point unit.

[0118] The TMS320F28388 features a dual-core C28x CPU with a significantly increased clock speed of 200MHz. Each core is equipped with a more powerful 64-bit floating-point unit. In addition, it includes two programmable control law accelerators (CLAs) for real-time control, with a total processing power of up to 925 MIPS. The TMS320F28388's central processing unit (CPU) architecture has leaped from a single core to a dual-core + CLA architecture, resulting in a qualitative leap in both clock speed and processing power.

[0119] Regarding memory configuration, the TMS320F28335 provides 512KB of flash memory and 68KB of random-access memory (RAM), while the TMS320F28388 has a significantly increased memory capacity, with 1.5MB of flash memory and 338KB of RAM.

[0120] Regarding analog-to-digital converters (ADCs), the TMS320F28335 integrates a 12-bit ADC module with 16 channels. The TMS320F28388's analog peripherals have been fully upgraded, featuring four independent ADC modules (two 12-bit SAR-ADCs and two 16-bit SAR-ADCs), providing up to 24 ADC channels. SAR stands for Successive Approximation Register.

[0121] Regarding communication interfaces and protocols, the TMS320F28335 primarily provides basic communication interfaces such as Controller Area Network (CAN), Serial Communication Interface (SCI), Serial Peripheral Interface (SPI), and Inter-Integrated Circuit (I²C). The TMS320F28388 integrates a rich set of industrial communication protocols, including EtherCAT (Ethernet for Control Automation Technology), Ethernet, and CAN with Flexible Data Rate (CANFD). Other interfaces include Fast Serial Interface (FSI).

[0122] Regarding control peripherals, the TMS320F28335 provides 12 enhanced-pulse-width modulation (ePWM) channels, while the TMS320F28388 provides up to 32 ePWM channels, significantly enhancing control capabilities and enabling the simultaneous management of more insulated-gate bipolar transistor (IGBT) modules.

[0123] In summary, the power quality management modules mentioned in this application are designed using the hardware parameters of the APF module, which can simultaneously meet the electrical design requirements of SVG, ASVG, SPC, and APF.

[0124] Furthermore, comparing the three-phase grid connection terminal parameters of SVG, ASVG, SPC, and APF, the differences are as follows:

[0125] The SVG and ASVG use one neutral terminal, while the SPC and APF use two neutral terminals. This is because the current flowing through the neutral line of the SPC and APF modules is more than twice the current flowing through the phase line.

[0126] Comparing the zero-copper busbar parameters of SVG, ASVG, SPC, and APF, the differences are as follows:

[0127] The neutral terminal of SVG and ASVG is one, while the cross-sectional area of ​​the neutral copper busbar of SPC and APF is twice that of SVG and ASVG. This is because the current flowing through the neutral line of SPC and APF modules is more than twice the current of the phase line.

[0128] Considering the above differences, if the hardware design of APF is adopted, it can fully meet the electrical design requirements of SVG, ASVG, and SPC modules. Therefore, the power quality management module used in this application adopts the hardware design of APF.

[0129] Regarding the control software for the power quality management module mentioned in this application, including the power quality management module control software and the controller control software, its overall block diagram is as follows: Figure 7 As shown, it specifically includes: the edge computing layer of the controller control software and the real-time control layer of the control software of each power quality module. The communication between the edge computing layer of the controller control software and the real-time control layer of the power quality management module control software adopts the CANFD bus. While maintaining real-time performance and reliability, the bandwidth is increased from 1Mb / s to 5Mb / s or even 8Mb / s, and the single frame data length is extended from 8 bytes to 64 bytes.

[0130] This communication architecture is suitable for transmitting real-time collected instantaneous sampling data of three-phase voltage and current on the grid side and instantaneous current data of the module inverter to the controller, as well as data transmission between multiple modules and real-time current sharing control adjustment of multiple module inverters. This communication architecture is suitable for the controller to calculate and send module function demand parameters in real time, and adjust the power quality management effect in a timely manner.

[0131] The control software used to control the power quality management module includes:

[0132] Sampling and phase-locked loop unit.

[0133] Reactive power + harmonics + zero-sequence / negative-sequence separation and detection algorithm unit.

[0134] Output compensation current synthesis control unit (controller including functional demand parameter model, wherein the functional demand parameter model block diagram is as follows) Figure 8 As shown), the functional demand parameter model specifically includes: a load-side negative-sequence / zero-sequence current deficit demand calculation unit, used to calculate the load-side negative-sequence / zero-sequence current deficit demand;

[0135] Functional requirement parameter calculation unit, used to calculate the required parameters for the function;

[0136] The load-side reactive current deficit demand calculation unit is used to calculate the load-side reactive current deficit demand.

[0137] The load-side harmonic current deficit demand calculation unit is used to calculate the load-side harmonic current deficit demand.

[0138] The specific calculation methods for the load-side negative / zero sequence current deficit, functional requirements, load-side reactive current deficit, and load-side harmonic current deficit mentioned above are explained in Example 1.

[0139] The human-machine interface processing unit is used for parameter setting and displaying various types of data;

[0140] A data, parameter storage and operation log recording and processing unit is used to store data and parameters and record operation logs;

[0141] The communication processing unit is used to receive various types of data and send out functional requirement parameters.

[0142] Pulse Width Modulation (PWM) generation & dead-time compensation unit.

[0143] Hardware protection unit (overcurrent / overtemperature / DC overvoltage → fast shutdown).

[0144] Module cascaded equalization unit (drooping method + redundancy switching).

[0145] The communication processing unit is used to upload various types of data and send functional requirement parameters.

[0146] The controller control software includes:

[0147] The communication processing unit is used to receive various types of data and send out functional requirement parameters.

[0148] The power quality data analysis unit is used to generate parameters based on the functional demand algorithm.

[0149] The human-machine interface processing unit is used to set parameters and display various types of data.

[0150] The data, parameter storage and operation log recording and processing unit is used to store data and parameters and record operation logs.

[0151] The main flowchart of the controller control software is shown below. Figure 2 As shown.

[0152] Example 1:

[0153] Figure 1 and Figure 3 This is a flowchart of the demand control method for the power quality management module in Embodiment 1 of the present invention. The flowchart only illustrates the logical sequence of the method described in this embodiment. Provided there are no conflicts, different methods may be used in other possible embodiments of the present invention. Figure 1 and Figure 3 Complete the steps shown or described in the order indicated.

[0154] The power quality management module demand control method provided in this embodiment can be applied to a terminal and can be executed by a mechanical equipment fault identification device. This device can be implemented in software and / or hardware and can be integrated into the terminal, such as any smartphone, tablet, or computer device with communication capabilities. The method in this embodiment specifically includes the following steps:

[0155] Step 1: Obtain the real-time transmission data and total rated current of the power quality management device; according to the above-mentioned information, since the hardware design scheme adopted by the power quality management module is the APF scheme, the model definition also adopts the APF model definition.

[0156] For example, APF0.4 / 100-3P4L indicates that it is used in a 0.4kV power grid system with a rated output current of 100A, where 100A means that one phase of the three-phase current is 100A, and it is a three-phase four-wire module.

[0157] Obtaining the total rated current includes:

[0158] ,

[0159] in, For the total rated current, Indicates the number of modules. Indicates the module's rated current;

[0160] Specifically, the real-time transmitted data includes: instantaneous three-phase voltage and three-phase current collected by the grid-side sampling points; three-phase active power, three-phase reactive power, three-phase power factor, three-phase active current, three-phase reactive current, three-phase total and harmonic current, root-mean-square values ​​of the positive-sequence, negative-sequence, and zero-sequence components of the three-phase currents collected by the grid-side sampling points; three-phase active power, three-phase reactive power, three-phase power factor, three-phase reactive current, three-phase total and harmonic currents; root-mean-square values ​​of the positive-sequence, negative-sequence, and zero-sequence components of the three-phase currents.

[0161] Step 2: Calculate the load-side reactive current deficit, harmonic current deficit, and unbalanced current deficit for the current demand cycle based on the real-time transmitted data:

[0162] The expression for the reactive current deficit requirement on the load side is:

[0163] ,

[0164] In the formula, ,

[0165] when hour, ,

[0166] ,

[0167] ,

[0168] ,

[0169] ,

[0170] ,

[0171] ,

[0172] ,

[0173] in, This is a collection of reactive current deficit requirements on the load side over a 24-hour period. Provide the reactive current demand set for the module output. For the first The module output reactive current demand per slip cycle. This indicates the reactive current demand output by the module during the first demand cycle. This indicates the reactive current demand of the module output during the first slip cycle. This is a collection of reactive current deficit demand on the grid side. For the first The grid-side reactive current deficit demand per slip cycle. This refers to the grid-side reactive current deficit demand during the first demand cycle. This represents the grid-side reactive current deficit demand during the first slip cycle. For the first The set of three-phase reactive current deficit demand on the grid side during each sampling period. , and respectively grid side Phase reactive current deficit demand collection, grid side Phase reactive current deficit demand collection and grid side Phase reactive current deficit demand set This refers to the reactive power deficit demand on the power grid side. for The set of three-phase voltages on the grid side at any given time. , and respectively grid side Phase voltage, grid side Phase voltage and grid side Phase voltage, This represents the current reactive power. This represents the current active power. For the target power factor, For the preset demand cycle, For the preset slip period, For the preset sampling period, The number of samples per unit demand period. In this embodiment, the number of slip cycles that occur within 24 hours is represented. It can be set to 15 minutes. It can be set to any value within the range of 1 minute to 15 minutes, and the sampling period can be set to 3 seconds;

[0174] It should be noted that the demand cycle and slippage cycle mentioned in this application can be found in the appendix to the specification. Figure 4 As shown, the time between the first demand cycle and the second demand cycle is the first slip cycle. Therefore, the ordinal number of the slip cycle is 1 less than the ordinal number of the demand cycle.

[0175] The expression for the load-side harmonic current deficit requirement is as follows:

[0176] ,

[0177] In the formula, ,

[0178] when hour, ,

[0179] ,

[0180] ,

[0181] ,

[0182] ,

[0183] in, This represents the set of load-side harmonic current deficit requirements over a 24-hour period. Set the required harmonic current deficit for module output. This is the set of harmonic current deficit demand on the power grid side. For the first The 95% probability value of the harmonic current deficit required by the slip cycle module output. For the first The root mean square value of the total harmonic current output by the module during each sampling period. The first output of the module The root mean square value of the subharmonic current content. For the first Harmonic current deficit demand on the grid side for one slip cycle (95% probability value) This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first demand cycle. This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first slip cycle. The first one detected by the module The root mean square value of the subharmonic current content. This is the root mean square value of the harmonic current content with a 95% probability detected by the module. For the first The root mean square value of the total harmonic current detected by the module during each sampling period. This is the root mean square value of the total harmonic current detected by the module during the first sampling period. This is the root mean square value of the total harmonic current detected by the module during the second sampling period;

[0184] The expression for the unbalanced current deficit requirement on the load side is as follows:

[0185] ,

[0186] In the formula, ,

[0187] ,

[0188] when hour, ,

[0189] ,

[0190] ,

[0191] ;

[0192] ,

[0193] ,

[0194] ,

[0195] ,

[0196] ,

[0197] ;

[0198] in, This represents the set of unbalanced current deficit requirements on the load side over a 24-hour period. This represents the set of maximum negative sequence current deficit requirements on the load side over a 24-hour period. This represents the set of maximum zero-sequence current deficit requirements on the load side over a 24-hour period. This is the set of zero-sequence current requirements for module output over 24 hours. This represents the set of zero-sequence current deficit demand on the power grid side over a 24-hour period. In the first The maximum zero-sequence current output within one slip cycle The maximum zero-sequence current output during the first demand cycle. The maximum zero-sequence current output during the first slip cycle, For the first The zero-sequence current output by the module during each sampling period. This represents the zero-sequence current output by the module during the first sampling period. This refers to the zero-sequence current output by the module during the second sampling period. For the 24-hour power grid side Zero-sequence current deficit requirement. This is the first zero-sequence current deficit requirement on the grid side within 24 hours. This is the second zero-sequence current deficit requirement on the grid side within 24 hours. For the first Zero-sequence current deficit during each sampling period This refers to the zero-sequence current deficit during the first sampling period. This refers to the zero-sequence current deficit during the second sampling period. This is the collection of three-phase zero-sequence currents on the grid side. For the power grid side Phase current, For the power grid side Phase current, For the power grid side Phase current, This represents the set of negative sequence current requirements output by the module over a 24-hour period. This represents the set of negative sequence current deficit demand on the power grid side over a 24-hour period. For the module in the The maximum negative sequence current output within one slip cycle. This is the maximum negative sequence current output by the module during the first demand cycle. This represents the maximum negative sequence current output by the module during the first slip cycle. For the first The negative sequence current output by the module during each sampling period This is the negative sequence current output by the module during the first sampling period. This refers to the negative sequence current output by the module during the second sampling period. In the first Maximum negative sequence current deficit within one slip cycle. This represents the maximum negative sequence current deficit during the first demand cycle. This represents the maximum negative sequence current deficit during the first slip cycle. For the first The set of negative sequence current deficits during each sampling period. This refers to the negative sequence current deficit during the first sampling period. This refers to the negative sequence current deficit during the second sampling period. For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current.

[0199] Step 3: Calculate the total current deficit demand based on the reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand on the load side of the current demand cycle. The expression for the total current deficit demand is as follows:

[0200] ,

[0201] in, For the load side, the first within 24 hours Maximum total current deficit requirement of three phases during one slip cycle. For the load side, the first within 24 hours Reactive current deficit demand during one slip cycle. For the load side, the first within 24 hours Load-side unbalanced current deficit during each slip cycle For the load side, the first within 24 hours Load-side harmonic current deficit requirement during one slip cycle.

[0202] Step 4: When the total current deficit demand does not exceed the total rated current, current allocation is performed according to the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand for the current demand cycle, including:

[0203] ,

[0204] ,

[0205] ,

[0206] in, , and These are the reactive power compensation current component, harmonic compensation current component, and three-phase current imbalance compensation current component of the current demand cycle module, respectively.

[0207] Step 5: Obtain the functional demand parameters for the next slip cycle based on the allocated functional compensation current components and the total current deficit demand:

[0208] ,

[0209] ,

[0210] ,

[0211] in, This refers to reactive power demand parameters; For harmonic demand parameters; For unbalanced demand parameters;

[0212] The constraint in current allocation is that the current allocation for each demand must meet its demand amount, and the current allocation must not be less than the maximum current of each demand.

[0213] Step 6: Send the functional demand parameters to each power quality management module of the power quality management device, and obtain the upper limit of the functional compensation current component of each power quality management module based on the functional demand parameters and the rated current of each power quality management module.

[0214] The upper limit of the functional compensation current component of each power quality management module is the product of the rated current of each power quality management module and the functional demand parameter.

[0215] Step 7: Under the constraint of the upper limit of the functional compensation current component, perform functional current compensation on the load in the power grid based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side.

[0216] Steps four, five, six, and seven above are as per the instruction manual. Figure 3 The capacity allocation algorithm based on functional requirements mentioned in the article.

[0217] Furthermore, the power quality management module demand control method provided in this embodiment can also replace step four with the following steps, based on steps one through seven above:

[0218] When the total current deficit exceeds the total rated current, current is allocated based on a preset order of highest priority, second highest priority, and lowest priority. The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total rated current, including:

[0219] If the current demand deficit of the highest priority functional current in the current demand cycle is less than the total rated current, the highest priority functional current is allocated from the total rated current to obtain the total remaining current of the device after one allocation:

[0220] ,

[0221] Specifically, the constraints are as follows:

[0222] ,

[0223] When the total residual current of the device after one allocation is equal to 0, an alarm is triggered, and the functional demand parameters for the next slip cycle are 1, 0 and 0 respectively.

[0224] When the total residual current of the device allocated once is greater than 0, the second-highest priority functional current is allocated from the total residual current of the device allocated once, to obtain the total residual current of the device allocated twice:

[0225] Calculate the total residual current of the device after the two distributions:

[0226] ,

[0227] Specifically, the constraints are as follows:

[0228] ,

[0229] When the total residual current of the device after two distributions equals 0, an alarm is triggered. The functional demand parameters for the next slip cycle are as follows: , and 0;

[0230] When the total residual current of the device allocated twice is greater than 0, the lowest priority functional current is allocated from the total residual current of the device allocated twice.

[0231] Specifically, the constraints are as follows:

[0232] ,

[0233] The functional requirements parameters for the next slip cycle are as follows: , and ;

[0234] in, For the total rated current, The highest priority compensation current component allocated to the current demand cycle. The highest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the highest priority module in the current demand cycle. The total residual current of the device after one distribution. The second-highest priority compensation current component allocated for the current demand cycle. The second highest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the second-highest priority module in the current demand cycle. The total residual current of the device distributed twice. The lowest priority compensation current component allocated to the current demand cycle. The lowest priority function requirement parameter for the next slip cycle. This represents the current deficit demand of the lowest priority module in the current demand cycle.

[0235] The processing steps after obtaining the functional requirement parameters are exactly the same as steps five, six, and seven of the capacity allocation algorithm based on functional requirements mentioned above, and will not be repeated here.

[0236] The above is the instruction manual attached. Figure 3 The capacity geometric allocation algorithm based on priority sorting mentioned above. In addition to the above, the power quality management module functional demand control method provided in this embodiment can also trigger an alarm and increase the number of power quality management modules when the highest priority functional demand parameter is 1 and the total rated current cannot meet the highest priority shortfall demand.

[0237] Both the priority-based capacity allocation algorithm and the function-demand-based capacity allocation algorithm suffer from a "cold start" problem during controller power-on, where the function-demand parameters are only generated after a demand cycle. This invention defines clear rules for setting initial function-demand parameters. At the initial moment of controller power-on reset, the controller uses a set of initial function-demand parameters set based on priority. If communication is normal at this time, the controller communication subroutine sends the initial function-demand parameters via the CANFD bus to the subroutine of the module output compensation current synthesis control unit (the controller containing the function-demand parameters) for execution. This initial function-demand parameter vector... It can be set as follows:

[0238] ,

[0239] in, This is the initial highest priority function requirement parameter. The initial second-highest priority function requirement parameters. This is the initial minimum priority function requirement parameter.

[0240] Based on the above hardware and software design, the power quality module does not need to consider functional adaptability. The controller can sense the changes in the power quality parameters of the load in real time, and set the changing functional demand parameters according to the demand cycle time and slip time based on the functional priority, so as to ultimately achieve the goal of meeting various power quality management targets.

[0241] When users add or change the type of electrical equipment, if the three compensation demand capacities change, and the redundancy is not large compared to the actual needs (e.g., harmonic capacity demand increases, unbalanced capacity decreases, and total demand capacity remains unchanged), there is no need to stop the power supply to change the module type. It has the function of automatically sensing and analyzing power quality data, optimizing and adjusting the power quality management module's management mode, and optimizing the power quality management effect.

[0242] When designing new projects, electrical designers typically configure the capacity of each functional module based on 40% of the total transformer capacity, which cannot fully meet the actual needs of power quality management. The design scheme in this case only requires considering whether the total rated capacity of the modules meets the actual needs; there is no need to consider the selection of module functional capacities.

[0243] In summary, the power quality management module demand control method provided in this embodiment solves the problem of low utilization efficiency of the total installed capacity of the power quality management device due to the single function of the power quality management module.

[0244] Example 2:

[0245] Embodiment 2 of the present invention provides a power quality management module functional demand control device, comprising:

[0246] The acquisition unit is used to acquire real-time transmitted data and total rated current of the power quality management device;

[0247] The first calculation unit is used to calculate the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand for the current demand cycle based on the real-time transmitted data.

[0248] The second calculation unit is used to calculate the total current deficit demand based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side of the current demand cycle.

[0249] The current distribution unit is used to distribute current according to the load-side reactive current deficit, harmonic current deficit, and unbalanced current deficit in the current demand cycle when the total current deficit demand does not exceed the total rated current.

[0250] The functional demand parameter calculation unit is used to obtain the functional demand parameters for the next slip cycle based on the allocated current and the total current deficit demand.

[0251] The upper limit calculation unit for the functional compensation current component is used to send the functional demand parameters to each power quality management module of the power quality management device, and to obtain the upper limit of the functional compensation current component of each power quality management module based on the functional demand parameters and the rated current of each power quality management module.

[0252] The compensation unit is used to perform functional current compensation on the load in the power grid based on the reactive current deficit demand, harmonic current deficit demand and unbalanced current deficit demand on the load side, under the constraint of the upper limit of the functional compensation current component.

[0253] The power quality management module also has reactive current compensation, three-phase current imbalance compensation, and harmonic current compensation functions.

[0254] The power quality management module demand control device provided in Embodiment 2 of the present invention can execute the power quality management module demand control method provided in Embodiment 1 of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0255] The hardware principle block diagram of the power quality management module demand control device provided in this embodiment is as follows: Figure 5 As shown in the figure, it also includes a current transformer for converting large currents to standard small currents and a voltage transformer for converting large voltages to standard small voltages. The current transformer and voltage transformer are existing mature technologies and will not be described in detail here. M1~Mn are power quality management modules that can meet the hardware technical requirements of SVG, ASVG, SPC, and APF. K1 is an embedded industrial controller with a real-time clock, CANFD communication interface, 4G+64G memory and hard disk, touch screen, and Intel i5 / i7 chip. Is is the grid-side current, IL is the load-side current, and Im is the module output current.

[0256] Example 3:

[0257] Embodiment 3 of the present invention also provides an electronic terminal, including a processor and a memory connected to the processor. The memory stores a computer program, the real-time transmission data, the calculation data, and setting parameters. The processor is used to perform operations according to the instructions to execute the steps of the method described in Embodiment 1.

[0258] The electronic terminal provided in Embodiment 3 of the present invention can execute the adaptive frequency enhancement and sparse compensation method provided in Embodiment 1 of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0259] Example 4:

[0260] Embodiment 4 of the present invention also provides a computer-readable storage medium storing a computer program, the real-time transmission data, the calculation data and setting parameters thereon. When the computer program is executed by a processor, it implements the steps of the method described in Embodiment 1 and has the corresponding functional modules and beneficial effects of the method.

[0261] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0262] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0263] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0264] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0265] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power quality mitigation module function demand control method, characterized by, The method comprises the following steps: obtaining real-time transmission data and total rated current of the power quality treatment device; calculating load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period according to the real-time transmission data; calculating total current deficiency demand according to the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period; when the total current deficiency demand does not exceed the total rated current, performing current distribution according to the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period; obtaining functional demand parameters of the next sliding period according to the distributed current and the total current deficiency demand; downloading the functional demand parameters to each power quality treatment module of the power quality treatment device, and obtaining the upper limit of the functional compensation current component of each power quality treatment module according to the functional demand parameters and the rated current of each power quality treatment module; under the constraint of the upper limit of the functional compensation current component, performing functional current compensation on the load in the power grid based on the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand.

2. The power quality governing module function demand control method of claim 1, wherein, Further comprising: when the total current deficiency demand exceeds the total rated current, performing current distribution based on the order of the preset highest priority, second highest priority and lowest priority, and obtaining the functional demand parameters of the next sliding period according to the distributed current and the total rated current.

3. The power quality governing module function demand control method of claim 2, wherein, The expression of the load-side reactive current deficiency demand is as follows: ， In the formulae, , When time, , ， ， ， ， ， ， ， wherein, is a set of load-side reactive current deficiency demands, is a set of module output reactive current demands, is a module output reactive current demand of the th slip period, is a module output reactive current demand of the first demand period, is a module output reactive current demand of the first slip period, is a set of grid-side reactive current deficiency demands, is a grid-side reactive current deficiency demand of the th slip period, is a grid-side reactive current deficiency demand of the first demand period, is a grid-side reactive current deficiency demand of the first slip period, is a set of grid-side three-phase reactive current deficiency demands at the th sampling period, , and are a set of grid-side -phase reactive current deficiency demands, a set of grid-side -phase reactive current deficiency demands and a set of grid-side -phase reactive current deficiency demands, respectively, is a grid-side reactive power deficiency, is a set of grid-side three-phase voltages at the th moment, , and are grid-side -phase voltage, grid-side -phase voltage and grid-side -phase voltage, respectively, is a current reactive power, is a current active power, is a target power factor, is a preset demand period, is a preset slip period, is a preset sampling period, is a sampling number within a unit demand period, is a number of slip periods passed within twenty-four hours; The expression of the load-side harmonic current deficiency demand is as follows: ， In the formulae, , When time, , ， ， ， ， in, This represents the set of load-side harmonic current deficit requirements over a 24-hour period. Set the required harmonic current deficit for module output. This is the set of harmonic current deficit demand on the power grid side. For the first The 95% probability value of the harmonic current deficit required by the slip cycle module output. This represents the 95% probability value of the harmonic current deficit demand output by the first demand cycle module. For the first The root mean square value of the total harmonic current output by the module during each sampling period. The first output of the module The root mean square value of the subharmonic current content. For the first Harmonic current deficit demand on the grid side for one slip cycle (95% probability value) This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first demand cycle. This represents the 95% probability value of the harmonic current deficit demand on the grid side during the first slip cycle. The first one detected by the module The root mean square value of the subharmonic current content. This is the root mean square value of the harmonic current content with a 95% probability detected by the module. For the first The root mean square value of the total harmonic current detected by the module during each sampling period. This is the root mean square value of the total harmonic current detected by the module during the first sampling period. This is the root mean square value of the total harmonic current detected by the module during the second sampling period; The expression of the load-side unbalanced current deficiency demand is as follows: ， In the formulae, , ， When time, , ， ， ； ， ， ， ， ， ； in, This represents the set of unbalanced current deficit requirements on the load side over a 24-hour period. This represents the set of maximum negative sequence current deficit requirements on the load side over a 24-hour period. This represents the set of maximum zero-sequence current deficit requirements on the load side over a 24-hour period. This is the set of zero-sequence current requirements for module output over 24 hours. This represents the set of zero-sequence current deficit demand on the power grid side over a 24-hour period. In the first The maximum zero-sequence current output within one slip cycle The maximum zero-sequence current output during the first demand cycle. The maximum zero-sequence current output during the first slip cycle, For the first The zero-sequence current output by the module during each sampling period. This represents the zero-sequence current output by the module during the first sampling period. This refers to the zero-sequence current output by the module during the second sampling period. For the 24-hour power grid side Zero-sequence current deficit requirement. This is the first zero-sequence current deficit requirement on the grid side within 24 hours. This is the second zero-sequence current deficit requirement on the grid side within 24 hours. For the first Zero-sequence current deficit during each sampling period This refers to the zero-sequence current deficit during the first sampling period. This refers to the zero-sequence current deficit during the second sampling period. This is the collection of three-phase zero-sequence currents on the grid side. For the power grid side Phase current, For the power grid side Phase current, For the power grid side Phase current, This represents the set of negative sequence current requirements output by the module over a 24-hour period. This represents the set of negative sequence current deficit demand on the power grid side over a 24-hour period. For the module in the The maximum negative sequence current output within one slip cycle. This is the maximum negative sequence current output by the module during the first demand cycle. This represents the maximum negative sequence current output by the module during the first slip cycle. For the first The negative sequence current output by the module during each sampling period This is the negative sequence current output by the module during the first sampling period. This refers to the negative sequence current output by the module during the second sampling period. In the first Maximum negative sequence current deficit within one slip cycle. This represents the maximum negative sequence current deficit during the first demand cycle. This represents the maximum negative sequence current deficit during the first slip cycle. For the first The set of negative sequence current deficits during each sampling period. This refers to the negative sequence current deficit during the first sampling period. This refers to the negative sequence current deficit during the second sampling period. For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current of phase, For the first The grid side during each sampling period Negative sequence current; The expression of the load-side total current deficiency demand is as follows: ， wherein, is the three-phase maximum total current deficiency demand of the load side at the th slip cycle within 24 hours, is the reactive current deficiency demand of the load side at the th slip cycle within 24 hours, is the load side unbalanced current deficiency demand of the load side at the th slip cycle within 24 hours, is the load side harmonic current deficiency demand of the load side at the th slip cycle within 24 hours.

4. The power quality governing module function demand control method of claim 3, wherein, when the total current deficiency demand does not exceed the total rated current, performing current distribution according to the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period, and obtaining the functional demand parameters of the next sliding period according to the distributed current and the total current deficiency demand, comprising: ， ， ， wherein, , and are the reactive power compensation current component, the harmonic compensation current component and the three-phase current imbalance compensation current component of the current demand period module, respectively; obtaining the functional demand parameters of the next sliding period according to the distributed functional compensation current component and the total current deficiency demand: ， ， ， wherein, is a reactive demand parameter; is a harmonic demand parameter; is an unbalanced demand parameter; the constraint in current distribution is that each required current distribution needs to meet its demand, and the current distribution is not less than the maximum current of each requirement.

5. The power quality governing module function demand control method of claim 2, wherein, when the total current deficiency demand exceeds the total rated current, performing current distribution based on the order of the preset highest priority, second highest priority and lowest priority, and obtaining the functional demand parameters of the next sliding period according to the distributed current and the total rated current, comprising: if the highest priority functional current deficiency demand of the current demand period is less than the total rated current, distributing the highest priority functional current from the total rated current to obtain the total residual current of the device distributed once: ， the constraint condition is: ， when the total residual current of the device distributed once is equal to 0, triggering an alarm, and the functional demand parameters of the next sliding period are 1, 0 and 0 respectively; when the total residual current of the device distributed once is greater than 0, distributing the second highest priority functional current from the total residual current of the device distributed once to obtain the total residual current of the device distributed twice: ， the constraint condition is: ， When the total remaining current of the device assigned twice equals 0, an alarm is triggered, and the function demand parameters of the next sliding period are respectively , and 0; when the total remaining current of the twice-allocated device is greater than 0, allocating the lowest priority function current from the total remaining current of the twice-allocated device; the constraint condition is: ， The functional demand parameters of the next slide period are , and ; wherein, is the total rated current, is the highest priority compensating current component allocated for the current demand period, is the highest priority function demand parameter for the next slip period, is the current deficit demand of the highest priority module for the current demand period, is the total remaining current allocated once, is the next highest priority compensating current component allocated for the current demand period, is the next highest priority function demand parameter for the next slip period, is the current deficit demand of the next highest priority module for the current demand period, is the total remaining current allocated twice, is the lowest priority compensating current component allocated for the current demand period, is the lowest priority function demand parameter for the next slip period, is the current deficit demand of the lowest priority module for the current demand period.

6. The power quality governing module function demand control method of claim 5, wherein, further comprising: when the highest priority function demand parameter is 1 and the total rated current cannot meet the highest priority deficiency demand, triggering an alarm prompt to expand the number of power quality treatment modules.

7. A power quality mitigation module function demand control apparatus, characterized by, comprising: an acquisition unit configured to acquire real-time transmission data of a power quality treatment device and a total rated current; a first calculation unit configured to calculate, according to the real-time transmission data, load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of a current demand period; a second calculation unit configured to calculate, according to the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period, total current deficiency demand; a current allocation unit configured to, when the total current deficiency demand does not exceed the total rated current, allocate current according to the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period; a function demand parameter calculation unit configured to obtain a function demand parameter of a next sliding period according to the allocated current and the total current deficiency demand; a function compensation current component upper limit calculation unit configured to issue the function demand parameter to each power quality treatment module of the power quality treatment device, and obtain a function compensation current component upper limit of each power quality treatment module according to the function demand parameter and a rated current of each power quality treatment module; a compensation unit configured to compensate, under the constraint of the function compensation current component upper limit, load in a power grid based on the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand.

8. The power quality treatment module function demand control device according to claim 7, wherein the power quality treatment module simultaneously has a reactive current compensation function, a three-phase current unbalance compensation function and a harmonic current compensation function.

9. An electronic terminal, characterized in that a processor and a memory connected to the processor, and the memory stores a computer program, real-time transmission data, calculation data and setting parameters, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are executed.

10. A computer readable storage medium having stored thereon a computer program, the real-time transmission data, the calculation data and the setting parameters, characterized in that, The computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 6.

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