A power quality treatment module function demand control method and device and storage medium

Abstract

The application discloses the technical field of power quality treatment and relates to a power quality treatment module function demand control method, device and storage medium, which comprises the following steps: when the total current deficiency demand does not exceed the total rated current, current distribution is carried out according to the load side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand period, and the function demand parameters of the next sliding period are obtained according to the distributed current and the total current deficiency demand; and under the constraint of the upper limit of the function compensation current component, the load in the power grid is compensated with the function current based on the load side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand. The application can solve the technical problem that the existing power quality treatment scheme cannot completely adapt to the actual power quality treatment demand, and when the actual demand does not conform to the function capacity configuration, the number of function modules can only be replaced and adjusted by power-off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power quality treatment, and in particular to a power quality treatment module function demand control method, device and storage medium. BACKGROUND

[0002] At present, the core module of the power quality treatment device widely used in low-voltage distribution network is mostly composed of static var generator (SVG), advanced static var generator (ASVG), active power filter (APF) and smart power conditioner (SPC) in parallel, which is used to solve the common power quality problems in low-voltage power grid, such as low power factor, large harmonic, three-phase current imbalance, etc.

[0003] When designing the power quality treatment scheme, different modules need to be matched, and the number of modules needs to be configured according to the different compensation function capacities.

[0004] However, the main defect of the above is that when the user increases or changes the type of electrical equipment, if the inductive reactive power capacity demand, three-phase imbalance capacity demand and harmonic capacity demand change, in the case of little redundancy compared with the actual demand, such as the harmonic capacity demand becomes larger, the three-phase imbalance capacity demand becomes smaller, and the total demand capacity remains unchanged, only the module type can be replaced by power outage.

[0005] When designing a new project, the electrical designer configures the capacity of each function module according to 40% of the total capacity of the transformer, which cannot completely adapt to the actual demand of power quality treatment. If the actual demand does not match the capacity configuration of each function and exceeds the design value, each function module number must be replaced to adjust the capacity configuration by power outage, and the existing module capacity cannot be fully utilized. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art and provide a power quality treatment module function demand control method, device and storage medium, which can solve the technical problem that the existing power quality treatment scheme cannot completely adapt to the actual demand of power quality treatment, and when the actual demand does not match the capacity configuration of each function, only the number of each function module can be replaced to adjust by power outage.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, the present application provides a power quality treatment module function demand control method, comprising:

[0009] obtaining real-time transmission data of the power quality treatment device and total rated current;

[0010] calculating load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of a current demand period according to the real-time transmission data;

[0011] 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;

[0012] 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;

[0013] obtaining functional demand parameters of a next sliding period according to the distributed current and the total current deficiency demand;

[0014] issuing the functional demand parameters to each power quality treatment module of the power quality treatment device, and obtaining an upper limit of a functional compensation current component of each power quality treatment module according to the functional demand parameters and a rated current of each power quality treatment module;

[0015] performing functional current compensation for loads in the power grid based on the load-side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand under the constraint of the upper limit of the functional compensation current component.

[0016] Further, the method further comprises:

[0017] when the total current deficiency demand exceeds the total rated current, performing current distribution based on a preset order of highest priority, secondary 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.

[0018] Further, calculating the load-side reactive current deficiency demand comprises:

[0019] ,

[0020] wherein, ,

[0021] when , ,

[0022] ,

[0023] ,

[0024] ,

[0025] ,

[0026] ,

[0027] ,

[0028] ,

[0029] wherein, is a set of load-side reactive current deficiency demand, is a set of module output reactive current demand, is the module output reactive current demand of the th slip cycle, denotes the module output reactive current demand of the first demand cycle, denotes the module output reactive current demand of the first slip cycle, is a set of grid-side reactive current deficiency demand, is the grid-side reactive current deficiency demand of the th slip cycle, is the grid-side reactive current deficiency demand of the first demand cycle, is the grid-side reactive current deficiency demand of the first slip cycle, is a set of grid-side three-phase reactive current deficiency demand at the th sampling cycle, , and are a set of grid-side -phase reactive current deficiency demand, a set of grid-side -phase reactive current deficiency demand and a set of grid-side -phase reactive current deficiency demand, respectively, is a grid-side reactive power deficiency demand, is a set of grid-side three-phase voltage at the th moment, , and are grid-side -phase voltage, grid-side -phase voltage and grid-side -phase voltage, respectively, is the current reactive power, is the current active power, is the target power factor, is a preset demand cycle, is a preset slip cycle, is a preset sampling cycle, the number of sampling times in a unit demand period, the number of slip periods passed in 24 hours;

[0030] The expression of the load side harmonic current deficiency demand is as follows:

[0031] ,

[0032] In the formula, ,

[0033] When , ,

[0034] ,

[0035] ,

[0036] ,

[0037] ,

[0038] wherein, is the set of load side harmonic current deficiency demands in 24 hours, is the set of module output harmonic current deficiency demands, is the set of grid side harmonic current deficiency demands, is the 95% probability value harmonic current deficiency demand output by the module in the slip period, is the 95% probability value harmonic current deficiency demand output by the module in the first demand period, is the total harmonic current root mean square value output by the module at the sampling period, is the root mean square value of the harmonic current content output by the module, is the 95% probability value harmonic current deficiency demand of the grid side in the slip period, is the 95% probability value harmonic current deficiency demand of the grid side in the first demand period, is the 95% probability value harmonic current deficiency demand of the grid side in the first slip period, is the root mean square value of the harmonic current content detected by the module, is the root mean square value of the 95% probability value harmonic current content detected by the module, is the total harmonic current root mean square value detected by the module at the sampling period, is the total harmonic current root mean square value detected by the module at 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, is the grid-side negative sequence current;

[0054] The expression of the load-side total current deficiency demand at the i-th sampling period is as follows:

[0055] ,

[0056] wherein, is the three-phase maximum total current deficiency demand of the load side at the i-th slip period within 24 hours, is the reactive current deficiency demand of the load side at the i-th slip period within 24 hours, is the load-side unbalanced current deficiency demand of the load side at the i-th slip period within 24 hours, is the load-side harmonic current deficiency demand of the load side at the i-th slip period within 24 hours. Further, when the total current deficiency demand does not exceed the total rated current, the current is allocated according to the load-side reactive current deficiency demand, the load-side harmonic current deficiency demand and the load-side unbalanced current deficiency demand of the current demand period, and the functional demand parameters of the next slip period are obtained according to the allocated current and the total current deficiency demand, including: ,

[0057]

[0058] ,

[0059] ,

[0060] , wherein,

[0061] , and are the reactive compensation current component, the harmonic compensation current component and the three-phase current unbalanced compensation current component of the current demand period module, respectively; The functional demand parameters of the next slip period are obtained according to the allocated functional compensation current components and the total current deficiency demand:

[0062]

[0063] ,

[0064] ,

[0065] , wherein,

[0066] ​​​a reactive demand parameter; a harmonic demand parameter; an unbalance demand parameter;

[0067] The constraint in current distribution is that the current distribution for each demand needs to meet its demand parameter, and the current distribution is not less than the maximum current of each demand.

[0068] Further, when the total current deficiency demand exceeds the total rated current, the current distribution is performed based on the preset order of the highest priority, the second highest priority and the lowest priority, and the functional demand parameters of the next slip cycle are obtained according to the distributed current and the total rated current, comprising:

[0069] If the highest priority functional current deficiency demand of the current demand cycle is less than the total rated current, the highest priority functional current is distributed from the total rated current, and the device total residual current distributed once is obtained:

[0070] ,

[0071] The constraint condition is:

[0072] ,

[0073] When the device total residual current distributed once is equal to 0, an alarm is triggered, and the functional demand parameters of the next slip cycle are 1, 0 and 0 respectively;

[0074] When the device total residual current distributed once is greater than 0, the second highest priority functional current is distributed from the device total residual current distributed once, and the device total residual current distributed twice is obtained:

[0075] The device total residual current distributed twice is calculated:

[0076] ,

[0077] The constraint condition is:

[0078] ,

[0079] When the device total residual current distributed twice is equal to 0, an alarm is triggered, and the functional demand parameters of the next slip cycle are , and 0 respectively;

[0080] When the device total residual current distributed twice is greater than 0, the lowest priority functional current is distributed from the device total residual current distributed twice;

[0081] The constraint condition is:

[0082] ,

[0083] the function demand parameter of the next slip cycle is , and ;

[0084] wherein, is the total rated current, is the highest priority compensation current component allocated to the current demand cycle, is the highest priority function demand parameter of the next slip cycle, is the current demand cycle highest priority module current deficiency demand, the total remaining current allocated once by the device, is the second highest priority compensation current component allocated to the current demand cycle, is the second highest priority function demand parameter of the next slip cycle, is the current demand cycle second highest priority module current deficiency demand, the total remaining current allocated twice by the device, is the lowest priority compensation current component allocated to the current demand cycle, is the lowest priority function demand parameter of the next slip cycle, is the current demand cycle lowest priority module current deficiency demand.

[0085] Further, it further comprises:

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

[0087] In a second aspect, the present application provides a power quality management module function demand control device, comprising:

[0088] An acquisition unit is configured to acquire real-time transmission data of a power quality management device and a total rated current;

[0089] A first calculation unit is configured to calculate load side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of a current demand cycle according to the real-time transmission data;

[0090] A second calculation unit is configured to calculate 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 cycle;

[0091] A current allocation unit is configured to allocate current according to the load side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of the current demand cycle when the total current deficiency demand does not exceed the total rated current;

[0092] 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;

[0093] 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;

[0094] a compensation unit configured to perform function current compensation on loads in the power grid based on the reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the load side under the constraint of the function compensation current component upper limit.

[0095] Further, the power quality treatment module simultaneously has the functions of reactive current compensation, three-phase current unbalance compensation and harmonic current compensation.

[0096] In a third aspect, the present application provides an electronic terminal comprising a processor and a memory connected to the processor, wherein 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 the above aspects are performed.

[0097] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, real-time transmission data, calculation data and setting parameters, and when the computer program is executed by a processor, the steps of the method according to any one of the above aspects are implemented.

[0098] Compared with the prior art, the present application has the following beneficial effects:

[0099] The power quality treatment module function demand control method provided by the application, after the controller obtains the real-time transmission data of the power quality treatment device, the reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the load side in the current demand period are calculated according to the real-time transmission data, and the total current deficiency demand is calculated according to the three kinds of deficiency demands, when the total current deficiency demand does not exceed the total rated current, the current distribution is carried out according to the reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the load side in the current demand period, and the functional demand parameter of the next slip period is obtained according to the distributed current and the total current deficiency demand, and the upper limit of the functional compensation current component is obtained based on the functional demand parameter, under the constraint of the upper limit of the functional compensation current component, the load in the power grid is compensated by the functional current based on the reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the load side, which can fully adapt to the actual demand of power quality treatment, when the actual demand does not match the capacity configuration based on the priority order, such as exceeding the design value, the current distribution can be carried out according to the capacity geometric distribution algorithm based on the priority order, so as to meet the actual demand of power quality treatment, and power-off is not required. BRIEF DESCRIPTION OF DRAWINGS

[0100] Figure 1 A flowchart A of the power quality treatment module function demand control method provided by the embodiment of the application is provided.

[0101] Figure 2 A main flowchart of the controller control software provided by the embodiment of the application is provided.

[0102] Figure 3 A flowchart B of the power quality treatment module function demand control method provided by the embodiment of the application is provided.

[0103] Figure 4 A relationship diagram between the slip period and the demand period provided by the embodiment of the application is provided.

[0104] Figure 5 A principle block diagram of the power quality treatment device provided by the embodiment of the application is provided.

[0105] Figure 6 A circuit principle block diagram of the power quality treatment module provided by the embodiment of the application is provided.

[0106] Figure 7 A software control block diagram provided by the embodiment of the application is provided.

[0107] Figure 8 A functional demand parameter model block diagram provided by the embodiment of the application is provided. DETAILED DESCRIPTION

[0108] The technical solutions of the present application will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solutions of the present application, but not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments and the embodiments can be combined with each other.

[0109] In the present application, the term "and / or" is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents that the associated objects before and after the character " / " are in an "or" relationship.

[0110] Before specifically introducing the power quality treatment module function required control method to be disclosed in the present application, the power quality treatment module mentioned in the present application is simply described. The principle block diagram of the power quality treatment module mentioned in the present application is shown in Figure 6 The principle block diagram includes an inverter, an LCL circuit, a grid-connected relay circuit, a DC power supply, a main control board and a display circuit. The principle block diagram is completely consistent with the circuit principle block diagram of SVG, ASVG, SPC and APF. The circuit principle block diagram of SVG, ASVG, SPC and APF belongs to the conventional prior art, so the internal current flow and signal transmission process are not described here.

[0111] In addition, compared with SVG, ASVG, SPC and APF:

[0112] 1. LCL circuit parameters:

[0113] The parameters of the LCL circuit in the SVG, ASVG and SPC modules are the same, and the parameters of the LCL circuit in the APF module are different from those in other modules. The parameters of the LCL circuit in the SVG, ASVG and SPC modules can also use the parameters of the LCL circuit in the APF module, but the cost is about 10-20 yuan higher. If the LCL parameters are unified, it can be unified for stock keeping for mass production.

[0114] Regarding LCL, it is not a directly spellable word, but an abbreviation of the first letters of three English words, and the full name is Inductor-Capacitor-Inductor. LCL is composed of "two inductors (L) and one capacitor (C)", and the letter order is consistent with the connection order of the circuit elements.

[0115] 2. Digital signal processor (dsp, Digital-Signal-Processor) chip selection:

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

[0117] The TMS320F28335 adopts a single-core C28x CPU, has a main frequency of 150 MHz, and is equipped with a 32-bit floating point unit;

[0118] The TMS320F28388 adopts a dual-core C28x CPU, has a main frequency greatly increased to 200 MHz, and is equipped with a 64-bit floating point unit with higher performance for each core; in addition, the TMS320F28388 contains two programmable control law accelerators (CLA, Control-Law-Accelerator) for real-time control, and has a total processing capacity of up to 925 MIPS; the central processing unit (CPU, Central-Processing-Unit) architecture of the TMS320F28388 is upgraded from a single core to a dual core + CLA, and both the main frequency and the processing capacity have a qualitative leap.

[0119] Regarding the memory configuration, the TMS320F28335 provides 512 KB of flash memory (Flash) and 68 KB of random access memory (RAM, Random-Access-Memory), while the memory capacity of the TMS320F28388 is greatly increased, and the TMS320F28388 has 1.5 MB of flash memory and 338 KB of RAM.

[0120] Regarding the analog-to-digital converter (ADC, Analog-to-Digital-Converter), the TMS320F28335 integrates a 12-bit ADC module with a total of 16 channels, and the analog peripherals of the TMS320F28388 are comprehensively upgraded, and the TMS320F28388 has four independent ADC modules (2 12-bit SAR-ADC and 2 16-bit SAR-ADC), and can provide up to 24 ADC channels, wherein the full name of SAR is Successive-Approximation-Register, which is translated as Successive-Approximation-Register.

[0121] Regarding the communication interface and protocol, the TMS320F28335 mainly provides basic communication interfaces such as Controller-Area-Network (CAN), Serial-Communication-Interface (SCI), Serial-Peripheral-Interface (SPI), Inter-Integrated-Circuit (I2C), etc. The TMS320F28388 integrates rich industrial communication protocols, including slave controller (EtherCAT), Ethernet, and CAN with Flexible Data Rate (CANFD). Other interfaces such as Fast-Serial-Interface (FSI) are also provided.

[0122] Regarding the 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 management of more Insulated-Gate-Bipolar-Transistor (IGBT) modules simultaneously.

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

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

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

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

[0127] SVG and ASVG use one neutral terminal, while SPC and APF use two neutral terminals. The reason is that the current flowing through the neutral line of SPC and APF modules can reach more than twice the phase current.

[0128] In view of the above differences, if the hardware design of the APF is adopted, the electrical design requirements of the SVG, ASVG and SPC modules can be fully met. Therefore, the power quality treatment module adopted in the present application adopts the hardware design of the APF.

[0129] As for the control software of the power quality treatment module mentioned in the present application, including the power quality treatment module control software and the controller control software, the overall block diagram is as shown in Figure 7 The controller control software edge computing layer and the power quality treatment module control software real-time control layer communicate with each other through the CANFD bus, under the premise of maintaining real-time and reliability, the bandwidth is increased from 1 Mb / s (megabit per second) to 5 Mb / s or even 8 Mb / s, and the single frame data length is expanded from 8 Byte to 64 Byte.

[0130] This communication architecture is suitable for transmitting the real-time sampling data of the three-phase voltage and current of the grid side and the real-time current data of the module inverter to the controller, and for 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 issue the functional demand parameters of the module in real time, and to timely adjust the power quality treatment effect.

[0131] The power quality treatment module control software includes:

[0132] A sampling and phase-locked loop unit.

[0133] A reactive power + harmonic + zero sequence / negative sequence separation detection algorithm unit.

[0134] An output compensation current synthesis control unit (including a controller with a functional demand parameter model, the block diagram of which is as shown in Figure 8 As for the functional demand parameter model, it specifically includes: a load side negative sequence / zero sequence current deficiency demand calculation unit, which is used to calculate the load side negative sequence / zero sequence current deficiency demand;

[0135] A functional demand parameter calculation unit, which is used to calculate the functional demand parameter;

[0136] A load side reactive current deficiency demand calculation unit, which is used to calculate the load side reactive current deficiency demand;

[0137] A load side harmonic current deficiency demand calculation unit, which is used to calculate the load side harmonic current deficiency demand;

[0138] As for the load side negative sequence / zero sequence current deficiency demand, the functional demand parameter, the load side reactive current deficiency demand and the load side harmonic current deficiency demand mentioned above, the specific calculation methods are explained and described in Embodiment I.

[0139] A human-machine interface processing unit is used for parameter setting and display of various data.

[0140] A data, parameter storage and operation log recording processing unit is used for storing data and parameters and recording operation logs.

[0141] A communication processing unit is used for receiving various data and issuing function demand parameters.

[0142] A pulse width modulation (PWM) generation & dead zone compensation unit.

[0143] A hardware protection unit (overcurrent / overtemperature / direct current overvoltage→quickly closing).

[0144] A module cascade balancing unit (droop method + redundancy switching).

[0145] A communication processing unit is used for uploading various data and issuing function demand parameters.

[0146] The controller control software includes:

[0147] A communication processing unit is used for receiving various data and issuing function demand parameters.

[0148] A power quality data analysis unit is used for generating parameters according to function demand algorithms.

[0149] A human-machine interface processing unit is used for setting parameters and displaying various data.

[0150] A data, parameter storage and operation log recording processing unit is used for storing data and parameters and recording operation logs.

[0151] The main flow chart of the controller control software is shown in Figure 2 .

[0152] Embodiment One:

[0153] Figure 1 and Figure 3 are the flow charts of the power quality treatment module function demand control method in the embodiment one of the present application. The flow chart only shows the logical order of the method described in the embodiment, and in the premise of not conflicting with each other, the steps shown or described can be completed in an order different from Figure 1 and Figure 3 in other possible embodiments of the present application.

[0154] The power quality treatment module function quantity control method provided by the embodiment can be applied to a terminal and can be executed by a mechanical equipment fault identification device. The device can be implemented in software and / or hardware, and can be integrated in a terminal, such as any smart phone, tablet computer or computer device with communication function. The method of the embodiment specifically includes the following steps:

[0155] Step one: obtaining real-time transmission data and total rated current of the power quality treatment device; according to the above description, since the hardware design scheme of the power quality treatment module is the APF scheme, the model definition also adopts the APF model definition.

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

[0157] Among them, obtaining the total rated current includes:

[0158]

[0159] Among them, is the total rated current, represents the number of modules, represents the rated current of the module;

[0160] Specifically, the real-time transmission data includes: instantaneous three-phase voltage collected by the grid side sampling point, three-phase current; three-phase active power, three-phase reactive power, three-phase power factor, three-phase active current, three-phase reactive current, three-phase total and each harmonic current, positive sequence component root mean square value of three-phase current, negative sequence component root mean square value of three-phase current, zero sequence component root mean square value of three-phase current; three-phase active power, three-phase reactive power, three-phase power factor, three-phase reactive current, three-phase total and each harmonic current; positive sequence component root mean square value of three-phase current, negative sequence component root mean square value of three-phase current, zero sequence component root mean square value of three-phase current.

[0161] Step two: calculating the 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:

[0162] The expression of the load side reactive current deficiency demand is:

[0163]

[0164] In the formula,

[0165] When , ​​​,

[0166] ,

[0167] ,

[0168] ,

[0169] ,

[0170] ,

[0171] ,

[0172] ,

[0173] wherein, is the set of load-side reactive current deficiency demand, is the set of module output reactive current demand, is the module output reactive current demand of the th slip cycle, denotes the module output reactive current demand of the first demand cycle, denotes the module output reactive current demand of the first slip cycle, is the set of grid-side reactive current deficiency demand, is the grid-side reactive current deficiency demand of the th slip cycle, is the grid-side reactive current deficiency demand of the first demand cycle, is the grid-side reactive current deficiency demand of the first slip cycle, is the set of grid-side three-phase reactive current deficiency demand at the th sampling cycle, , and are the set of grid-side -phase reactive current deficiency demand, the set of grid-side -phase reactive current deficiency demand and the set of grid-side -phase reactive current deficiency demand, respectively, is the grid-side reactive power deficiency, is the set of grid-side three-phase voltage at the moment, , and are the grid-side -phase voltage, the grid-side -phase voltage and the grid-side -phase voltage, respectively, is the current reactive power, is the current active power, is the target power factor, is the preset demand period, is the preset slip period, is the preset sampling period, is the sampling number in a unit demand period, is the number of slip periods passed in 24 hours, in the embodiment, may be set to 15 minutes, may be set to any value in the range of 1 minute to 15 minutes, and the sampling period may be set to 3 seconds;

[0174] It should be noted that, regarding the demand period and the slip period described in the present application, reference can be made to the understanding shown in the attached Figure 4 The time between the first demand period and the second demand period is the first slip period, so the ordinal number of the slip period is one less than that of the demand period.

[0175] The expression of the load-side harmonic current deficiency demand is as follows:

[0176] ,

[0177] In the formula, ,

[0178] When , ,

[0179] ,

[0180] ,

[0181] ,

[0182] ,

[0183] Wherein, is the set of load-side harmonic current deficiency demands in 24 hours, is the set of module output harmonic current deficiency demands, is the set of grid-side harmonic current deficiency demands, is the 95% probability value harmonic current deficiency demand output by the module in the slip period, is the total harmonic current root mean square value output by the module at the sampling period, is the root mean square value of the harmonic current content output by the module, is the Harmonic current shortage demand for grid side 95% probability value of the first slip period, Harmonic current shortage demand for grid side 95% probability value of the first demand period, Harmonic current shortage demand for grid side 95% probability value of the first slip period, RMS value of the harmonic current content detected by the module, RMS value of the harmonic current content detected by the module, RMS value of the harmonic current content detected by the module, RMS value of the total harmonic current detected by the module at the first sampling period, RMS value of the total harmonic current detected by the module at the first sampling period, RMS value of the total harmonic current detected by the module at the second sampling period; Expression of the load side unbalanced current shortage demand is as follows:

[0184]

[0185] ,

[0186] , ,

[0187] ,

[0188] When , ,

[0189] ,

[0190] ,

[0191] ;

[0192] ,

[0193] ,

[0194] ,

[0195] ,

[0196] ,

[0197] ;

[0198] , is a set of load side unbalanced current shortage demands in 24 hours, ​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 the maximum negative sequence current deficiency in the first slip cycle, the maximum negative sequence current deficiency in the first demand cycle, the maximum negative sequence current deficiency in the first slip cycle, the negative sequence current deficiency set at the first sampling cycle, the negative sequence current deficiency at the first sampling cycle, the negative sequence current deficiency at the second sampling cycle, the negative sequence current deficiency at the first sampling cycle, the negative sequence current deficiency at the second sampling cycle, the grid-side phase negative sequence current at the first sampling cycle, the grid-side phase negative sequence current at the first sampling cycle, the grid-side phase negative sequence current at the first sampling cycle, the grid-side phase negative sequence current at the first sampling cycle, the grid-side phase negative sequence current at the first sampling cycle. the grid-side phase negative sequence current at the first sampling cycle. the grid-side phase negative sequence current at the first sampling cycle. the grid-side phase negative sequence current at the first sampling cycle.

[0199] Step three: calculate the total current deficiency demand according to the load-side reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the current demand cycle, and the expression of the total current deficiency demand is as follows:

[0200] ,

[0201] wherein, the three-phase maximum total current deficiency demand of the load side at the first slip cycle in 24 hours, the reactive current deficiency demand of the load side at the first slip cycle in 24 hours, the load-side unbalanced current deficiency demand of the load side at the first slip cycle in 24 hours, the load-side harmonic current deficiency demand of the load side at the first slip cycle in 24 hours. Step four: when the total current deficiency demand does not exceed the total rated current, the current is distributed according to the load-side reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the current demand cycle, including: ,

[0202]

[0203] ,

[0204] ,

[0205] ,

[0206] ​​​wherein, , and are reactive compensation current component, harmonic compensation current component and three-phase current imbalance compensation current component of the current period module respectively;

[0207] Step five: obtaining the functional demand parameters of the next sliding period according to the allocated functional compensation current component and the total current deficiency demand:

[0208] ,

[0209] ,

[0210] ,

[0211] wherein, is the reactive demand parameter; is the harmonic demand parameter; is the imbalance demand parameter;

[0212] The constraint in current allocation is that the current allocation of each demand needs to meet its demand, and the current allocation is not less than the maximum current of each demand.

[0213] Step six: issuing the functional demand parameters to each power quality management module of the power quality management device, and obtaining the upper limit of the functional compensation current component of each power quality management module according to the functional demand parameters and the rated current of each power quality management module;

[0214] wherein, 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 seven: 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 reactive current deficiency demand, harmonic current deficiency demand and imbalance current deficiency demand of the load side.

[0216] The above-mentioned steps four, five, six and seven are the capacity allocation algorithm based on functional demand mentioned in the specification attached Figure 3 .

[0217] In addition, the power quality management module functional demand control method provided by the embodiment can further replace step four with:

[0218] when the total current deficiency demand exceeds the total rated current, performing current allocation based on the order of the preset highest priority, the second highest priority and the lowest priority, and obtaining the functional demand parameters of the next sliding period according to the allocated current and the total rated current.

[0219] If the highest priority function current deficit demand of the current demand period is less than the total rated current, the highest priority function current is allocated from the total rated current to obtain the allocated once device total remaining current:

[0220] ,

[0221] In particular, the constraint condition is:

[0222] ,

[0223] When the allocated once device total remaining current is equal to 0, an alarm is triggered, and the function demand parameters of the next sliding period are 1, 0 and 0 respectively;

[0224] When the allocated once device total remaining current is greater than 0, the second highest priority function current is allocated from the allocated once device total remaining current to obtain the allocated twice device total remaining current:

[0225] The allocated twice device total remaining current is calculated as:

[0226] ,

[0227] In particular, the constraint condition is:

[0228] ,

[0229] When the allocated twice device total remaining current is equal to 0, an alarm is triggered, and the function demand parameters of the next sliding period are , and 0 respectively;

[0230] When the allocated twice device total remaining current is greater than 0, the lowest priority function current is allocated from the allocated twice device total remaining current;

[0231] In particular, the constraint condition is:

[0232] ,

[0233] The function demand parameters of the next sliding period are , and respectively;

[0234] wherein, is the total rated current, is the highest priority compensation current component allocated in the current demand period, is the highest priority function demand parameter of the next sliding period, is the current demand period highest priority module current deficit demand, total residual current of the device allocated once, the second highest priority compensation current component allocated for the current demand period, the second highest priority function demand parameter for the next sliding period, the current deficit demand of the second highest priority module for the current demand period, total residual current of the device allocated twice, the lowest priority compensation current component allocated for the current demand period, the lowest priority function demand parameter for the next sliding period, the current deficit demand of the lowest priority module for the current demand period.

[0235] The processing steps after obtaining the function demand parameters are exactly the same as steps five, six and seven of the above-mentioned capacity geometric allocation algorithm based on priority ranking, and will not be repeated here.

[0236] The above-mentioned capacity geometric allocation algorithm based on priority ranking mentioned in the specification appendix Figure 3 . In addition to the above, the power quality management module function demand control method provided by the embodiment can also trigger an alarm prompt when the highest priority function demand parameter is 1 and the total rated current cannot meet the highest priority deficit demand, and expand the number of power quality management modules.

[0237] Whether it is the above-mentioned capacity geometric allocation algorithm based on priority ranking or the capacity allocation algorithm based on function demand, there is a "cold start" problem that needs to wait for a demand period to generate function demand parameters when the controller is powered on. The present application defines a clear initial function demand parameter setting rule. At the initial moment of controller power-on reset, the controller will use a set of initial function demand parameters based on priority ranking settings. If the communication is normal at this time, the controller communication subroutine will issue the initial function demand parameters to the module output compensation current synthesis control unit (controller containing function demand parameter) subroutine for execution through the CANFD bus. The initial function demand parameter vector can be set as:

[0238] ,

[0239] Among them, is the initial highest priority function demand parameter, is the initial second highest priority function demand parameter, is the initial lowest priority function demand parameter.

[0240] The power quality module according to the above hardware and software design can not consider the functional adaptability, the controller can sense the power quality parameter change of the load in real time, and set the change function demand parameter according to the need period time and the slip time according to the function priority, and finally realize the satisfaction of various power quality management target values.

[0241] When the user increases or changes the type of the power consumption equipment, if the three compensation demand capacities change, in the case that the redundancy is not large compared with the actual need, for example, the harmonic capacity demand becomes larger, the unbalance capacity becomes smaller, and the total demand capacity does not change, it is not necessary to replace the module type by power off, and the function of automatically sensing and analyzing the power quality data, optimizing the adjustment of the power quality management module management mode and optimizing the power quality management effect is realized.

[0242] When a new project is designed, the electrical designer configures the capacity of each function module according to 40% of the total capacity of the transformer, and it is impossible to completely adapt to the actual power quality management demand. According to the design scheme of the present case, only whether the total module rated capacity meets the actual demand needs to be considered, and the selection of the module function capacity does not need to be considered.

[0243] In summary, the power quality management module function demand control method provided in the 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] Embodiment two

[0245] The embodiment two of the present application provides a power quality management module function demand control device, which comprises:

[0246] An acquisition unit is configured to acquire real-time transmission data and total rated current of a power quality management device.

[0247] A first calculation unit is configured to calculate load side reactive current deficiency demand, harmonic current deficiency demand and unbalanced current deficiency demand of a current demand period according to the real-time transmission data.

[0248] A second calculation unit is configured to calculate 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.

[0249] A current distribution unit is configured to distribute current 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.

[0250] A function demand parameter calculation unit is configured to obtain function demand parameters of a next slip period according to the distributed current and the total current deficiency demand.

[0251] a function compensation current component upper limit calculation unit configured to distribute 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;

[0252] a compensation unit configured to perform function current compensation on the load in the power grid based on the reactive current deficiency demand, the harmonic current deficiency demand and the unbalanced current deficiency demand of the load side under the constraint of the function compensation current component upper limit.

[0253] The power quality treatment module has the functions of reactive current compensation, three-phase current unbalance compensation and harmonic current compensation.

[0254] The power quality treatment module function demand control device provided in the second embodiment of the present application can execute the power quality treatment module function demand control method provided in the first embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0255] The principle block diagram of the hardware of the power quality treatment module function demand control device provided in the present embodiment is shown in Figure 5 The current transformer and the voltage transformer are prior art and will not be described here. M1-Mn are power quality treatment modules that meet the hardware technical requirements of SVG, ASVG, SPC and APF. K1 is an embedded industrial controller with real-time clock, CANFD communication interface, memory hard disk 4G+64G, touch screen and Inteli5 / i7 chip. Is is the grid-side current, IL is the load-side current and Im is the module output current.

[0256] Embodiment Three

[0257] The electronic terminal provided in the third embodiment of the present application can execute the adaptive frequency enhancement and sparse compensation method provided in the first embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0258] The electronic terminal provided in the third embodiment of the present application can execute the adaptive frequency enhancement and sparse compensation method provided in the first embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0259] Embodiment Four

[0260] The fourth embodiment of the present application also provides a computer readable storage medium, which stores a computer program, the real-time transmission data, the calculation data and the setting parameters, and the computer program is executed by a processor to implement the steps of the method in the first embodiment, and has the corresponding function modules and beneficial effects of the method.

[0261] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device, or computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt a computer program product in the form of being implemented on one or more computer usable storage media containing computer usable program codes (including but not limited to disk storage, CD-ROM, optical storage, etc.).

[0262] The present application is described with reference to flowcharts and / or block diagrams of the method, device (apparatus), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts 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, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device implemented in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in the flow(s) or block(s).

[0263] These computer program instructions can also be stored in a computer readable storage medium that can direct the computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable storage medium produce a manufactured product including instruction apparatus, which implements the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in the flow(s) or block(s).

[0264] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer implemented process, so that the instructions executed on the computer or other programmable device provide a process for implementing the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that performs the functions specified in the flow(s) or block(s).

[0265] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A demand control method for a power quality management module, characterized in that, include: Acquire real-time transmission data and total rated current from the power quality management device; 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. Calculate the total current deficit demand based on the load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand for the current demand cycle. 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. The functional demand parameters for the next slip cycle are obtained based on the allocated current and the total current deficit demand. 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: 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: ， The constraints are: ， 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. 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: ， The constraints are: ， 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; 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. The constraints are: ， The functional requirements parameters for the next slip cycle are as follows: , and ; 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. 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. 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 load-side reactive current deficit demand, harmonic current deficit demand, and unbalanced current deficit demand.

2. The power quality management module demand control method according to claim 1, characterized in that, The expression for the reactive current deficit requirement on the load side is: ， In the formula, , when hour, , ， ， ， ， ， ， ， 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 on the power 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 on the power 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. The expression for the load-side harmonic current deficit requirement is as follows: ， In the formula, , when hour, , ， ， ， ， 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 for the unbalanced current deficit requirement on the load side is as follows: ， In the formula, , ， when hour, , ， ， ； ， ， ， ， ， ； 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 for the total current deficit requirement on the load side is as follows: ， 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.

3. The power quality management module demand control method according to claim 2, characterized in that, 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. Based on the allocated current and the total current deficit demand, the functional demand parameters for the next slip cycle are obtained, including: ， ， ， 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. 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: ， ， ， in, This refers to reactive power demand parameters; For harmonic demand parameters; For unbalanced demand parameters; 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.

4. The power quality management module demand control method according to claim 1, characterized in that, Also includes: 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.

5. A power quality management module functional demand control device, used to execute the power quality management module functional demand control method according to any one of claims 1-4, characterized in that, include: The acquisition unit is used to acquire real-time transmitted data and total rated current of the power quality management device; 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. 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. 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. 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. 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. 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.

6. The power quality management module demand control device according to claim 5, characterized in that, The power quality management module also has reactive current compensation, three-phase current imbalance compensation, and harmonic current compensation functions.

7. An electronic terminal, characterized in that, The method includes a processor and a memory connected to the processor, wherein the memory stores a computer program, the real-time transmission data, the calculation data, and setting parameters, and when the computer program is executed by the processor, it performs the steps of the method as described in any one of claims 1 to 4.

8. A computer-readable storage medium storing thereon a computer program, the real-time transmitted data, the calculation data, and setting parameters, characterized in that, When executed by a processor, the computer program implements the steps of the method according to any one of claims 1 to 4.

Images