CN116896091B - Reactive power distribution method and device for multiple SVGs of new energy station - Google Patents

Reactive power distribution method and device for multiple SVGs of new energy station Download PDF

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CN116896091B
CN116896091B CN202311162376.8A CN202311162376A CN116896091B CN 116896091 B CN116896091 B CN 116896091B CN 202311162376 A CN202311162376 A CN 202311162376A CN 116896091 B CN116896091 B CN 116896091B
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reactive power
distribution
dead zone
reactive
svg
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CN116896091A (en
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盛洁
赵凯
王小芳
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Sprixin Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/50—Controlling the sharing of the out-of-phase component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a reactive power distribution method and device for a plurality of SVGs of a new energy station, and belongs to the technical field of power systems. The method comprises the following steps: receiving a reactive power instruction sent by a dispatching system; determining a dead zone boundary set corresponding to the first numerical value N based on the dead zones of the first numerical value N and the SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2; determining an allocation boundary corresponding to the reactive instruction based on the reactive instruction and the dead zone boundary set; determining an allocation strategy corresponding to the allocation boundary based on the allocation boundary and the reactive instruction; and executing reactive power distribution operation on each SVG in the new energy station based on the distribution strategy. The reactive power distribution method for the plurality of SVGs in the new energy station provided by the invention realizes the accurate distribution of the reactive power of the plurality of SVGs in the new energy station.

Description

Reactive power distribution method and device for multiple SVGs of new energy station
Technical Field
The invention relates to the technical field of power systems, in particular to a reactive power distribution method and device for a plurality of SVGs of a new energy station.
Background
Reactive compensation devices, particularly industrial and mining enterprises and residential areas with lower power factors, are generally arranged at the place where the low-voltage transformer is installed or beside large-scale electric equipment. The compensation equipment is added to improve the electric energy quality and the electric energy utilization rate. The static reactive power compensation device (Static Var Generator, SVG) has the advantages of high regulation precision, high speed, capability of outputting a power factor of 0.98, reduction of harmonic content and the like, and is a very popular reactive power compensation device.
In a scene which generally needs reactive compensation, a plurality of SVGs with 15% -50% of the total capacity of the low-voltage transformer are configured to operate in parallel. The distribution strategy commonly used for controlling reactive compensation by the automatic voltage control system at present is to perform average distribution according to the capacity or adjustable margin of the device or to preferentially adjust and control the SVG device with the minimum dead zone.
Because the reactive telemetry value of the residual SVG device in the dead zone is not reliable, and the SVG has a certain control dead zone, when the reactive compensation instruction is smaller, the reactive accurate distribution of a plurality of SVGs can not be realized.
Disclosure of Invention
The invention provides a reactive power distribution method and device for a plurality of SVGs in a new energy station, which are used for solving the defect that the reactive power of the plurality of SVGs cannot be accurately distributed in the prior art and realizing the accurate distribution of the plurality of SVGs in the new energy station.
The invention provides a reactive power distribution method for a plurality of SVGs of a new energy station, which comprises the following steps:
receiving a reactive power instruction sent by a dispatching system;
determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set;
determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction;
and executing reactive power distribution operation on each SVG in the new energy station based on the distribution strategy.
According to the reactive power distribution method for a plurality of SVGs of a new energy station, the dead zone boundary set corresponding to the first numerical value N is determined based on the first numerical value N and the dead zone of the SVGs, and the method comprises the following steps:
based on the first value N and the dead zone of the SVG, determining a dead zone boundary set corresponding to the first value using formula (1):
（1）
wherein N is the first value, the dead zone boundary set corresponding to the first value comprises N+1 distribution boundaries, Is the dead zone of the SVG.
According to the reactive power distribution method for a plurality of SVGs of a new energy station provided by the invention, after the dead zone based on the first numerical value N and the SVGs determines the dead zone boundary set corresponding to the first numerical value N, the method further comprises:
the dead zone boundary set is divided into positive half-zones, negative half-zones, and zero zones based on the sign of each assigned boundary in the dead zone boundary set.
According to the reactive power distribution method for a plurality of SVGs of a new energy station, the distribution boundary corresponding to the reactive power instruction is determined based on the reactive power instruction and the dead zone boundary set, and the method comprises the following steps:
and under the condition that the reactive power instruction belongs to the positive half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (2):
（2）
wherein,for the reactive instruction, +_>For the initial value of the iterator, +.>For the penultimate +.>A plurality of allocation boundaries;
and under the condition that the reactive power instruction belongs to the negative half zone, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (3):
（3）
wherein,for the +.>The distribution boundaries.
According to the reactive power distribution method for a plurality of SVGs of a new energy station provided by the invention, the distribution strategy corresponding to the distribution boundary is determined based on the distribution boundary and the reactive power instruction, and the method comprises the following steps:
In the case of the reactive order belonging to the negative half-zone, the front partStation SVG allocation->Rear (back)Station SVG allocation->；
Calculating a first passive residual allocation value by adopting a formula (4):
（4）
wherein M is the first passive remaining allocation value;
in the case where M is less than zero, assigning M to the first SVG;
in the case where M is greater than zero, M is assigned to the last SVG.
According to the reactive power distribution method for a plurality of SVGs of the new energy station, the method further comprises the following steps:
in the case that the reactive instruction belongs to the positive half zone, the front partStation SVG allocation->Rear (back)Station SVG allocation->；
Calculating a second reactive residual distribution value by adopting a formula (5):
（5）
wherein Z is the second reactive residual allocation value;
in the case where Z is less than zero, assigning Z to the last SVG;
in case Z is greater than zero, Z is assigned to the first SVG.
According to the reactive power distribution method for a plurality of SVGs of the new energy station, the method further comprises the following steps:
and determining a corresponding allocation strategy of the reactive power instruction based on the parity condition of the first numerical value under the condition that the reactive power instruction belongs to the zero zone.
According to the reactive power distribution method for a plurality of SVGs of a new energy station provided by the invention, the corresponding distribution strategy of the reactive power instruction is determined based on the parity condition of the first numerical value, and the method comprises the following steps:
In case said first value is even, the first value isStation SVG allocation->Rear (back)Station SVG allocation->；
In the case where the first value is odd, the frontSVG (static var generator) divisionIs provided with->Rear (back)Station SVG allocation->First->Station SVG allocation->Subtracting +.>。
The invention also provides a reactive power distribution device for a plurality of SVGs of the new energy station, which comprises:
the receiving module is used for receiving the reactive power instruction sent by the dispatching system;
the first determining module is used for determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and the SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
the second determining module is used for determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set;
the third determining module is used for determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction;
and the distribution module is used for executing reactive power distribution operation on each SVG in the new energy station based on the distribution strategy.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the reactive power distribution method of a plurality of SVGs of the new energy station is realized when the processor executes the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a reactive power distribution method for a plurality of SVGs of a new energy station as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements the reactive power distribution method for a plurality of SVGs of a new energy station as described in any one of the above.
After receiving reactive power instructions sent by a dispatching system, the reactive power distribution method and device for a plurality of SVGs in a new energy station determine a corresponding dead zone boundary set based on the number of SVGs set in the new energy station, the dead zone boundary set comprises a plurality of distribution boundaries, the distribution boundaries corresponding to the received reactive power instructions are determined through the received reactive power instructions and the determined dead zone boundary set, each distribution boundary corresponds to one distribution strategy, the corresponding distribution strategy is determined based on the determined distribution boundaries and reactive power instructions, and finally reactive power distribution is performed on the plurality of SVGs in the new energy station based on the distribution strategy. According to the reactive power distribution method for the multiple SVGs in the new energy station, through rapid dead zone boundary division and combination, the adjustment error of the SVGs near the minimum adjustment dead zone is avoided, and the accurate distribution of the reactive power of the multiple SVGs in the new energy station is realized.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a reactive power distribution method of a plurality of SVGs of a new energy station;
FIG. 2 is a schematic structural diagram of a reactive power distribution device for a plurality of SVGs in a new energy station provided by the invention;
fig. 3 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to facilitate a clearer understanding of various embodiments of the present invention, some relevant background knowledge is first presented as follows.
Reactive compensation is a technology for improving the power factor of a power grid, reducing the loss of a power supply transformer and a transmission line, improving the power supply efficiency and improving the power supply environment in an electric power supply system. Most electrical equipment requires reactive and active power when operating. Active power: directly consuming electric energy, converting the electric energy into mechanical energy, heat energy, chemical energy or acoustic energy, and utilizing the energy to do work, wherein the part of power is called active power; reactive power: consume electrical energy, but simply convert it into another form of energy, which is a prerequisite for the electrical device to be able to do work, and which is converted periodically with the electrical energy in the grid, this part of the power being called reactive power.
Under certain active power, the power factor is low, which means that the reactive power of the circuit for alternating magnetic field conversion is large, and the electric energy loss is larger, so that the power supply department has certain standard requirements on the power factor of the electricity utilization unit. The power loads in the power network, such as motors, transformers, fluorescent lamps, arc furnaces, etc., mostly belong to inductive loads, which during operation need to absorb not only active power but also reactive power to the power system. Therefore, after the parallel capacitor reactive compensation equipment is arranged in the power grid, reactive power consumed by compensating inductive load can be provided, and the lateral inductive load of the power grid power supply and the reactive power transmitted by a line are reduced. The flow of reactive power in the power grid is reduced, so that the electric energy loss of the transformer and the bus in the power transmission and distribution line caused by the transmission of the reactive power can be reduced, and the reactive power compensation benefit is realized. The main purpose of reactive compensation is to boost the power factor of the compensation system. Reactive value: in particular reactive power values, it means that in an ac circuit with reactance, the electric or magnetic field absorbs energy from the power supply during a part of the period and releases energy during another part of the period, the average power being zero during the whole period, but energy is constantly exchanged between the power supply and the reactive element. This energy is a prerequisite for the electrical equipment to be able to do work, and is converted periodically with the electrical energy in the grid, this part of power is called reactive power, MVar is the reactive power unit: m represents megabits, the order of units, var is the unit of reactive power, and is read.
The automatic voltage control (Automatic Voltage Control, AVC) is an important technical means for keeping the voltage of the system stable, improving the voltage quality of the power grid and the economic operation level of the whole system and improving the reactive voltage management level by carrying out centralized monitoring, analysis and calculation on the reactive voltage state of the whole network and carrying out coordinated optimization control on the wide-area scattered power grid reactive devices from the global angle, so that the automatic adjustment of the reactive voltage can be realized, and a certain optimization function is provided. The AVC system is a power grid voltage reactive power control system running in an on-line mode, real-time data such as bus voltage, bus reactive power, main transformer high and low voltage side reactive power measurement data and switch state data of each transformer substation and power plant are collected through a dispatching automation system to conduct on-line analysis and calculation, parameters of various reactive power control equipment in the whole grid are adjusted from the angle of power grid optimization running, centralized monitoring and analysis calculation are conducted on the parameters, under the constraint condition that node normal power balance and various safety indexes are met, the comprehensive optimization targets of minimum regulation times of a tap switch of a main transformer, most reasonable capacitor switching, optimal reactive power output of a generator, highest voltage qualification rate and minimum power grid loss rate are achieved, the process of power grid economic running is achieved, and automatic closed-loop control of coordination optimization of reactive power devices is achieved.
SVG has advantages of high regulation precision, high speed, capability of outputting a power factor of 0.98, reduction of harmonic content and the like, and is a very popular reactive compensation device. Reactive compensation scenes are generally required to be configured with a plurality of SVGs with 15% -50% of the total capacity of the low-voltage transformer to operate in parallel. SVG control accuracy is superior to general multistage reactive power compensation device, can realize the stepless compensation that starts from the several thousand of tenths. SVG reactive power output and working current are in proportion, and a minimum working current is needed for guaranteeing stable operation of SVG equipment. The reactive power corresponding between 0 and the minimum operating current is thus its reactive power regulation dead zone. Because of the process difference of SVG manufacturers, the reactive dead zone is 5% -10% of the capacity.
The distribution strategies commonly used for controlling reactive compensation by the current AVC system are all average distribution according to the capacity of the device or adjustable margin, and the two strategies cannot accurately compensate for reactive compensation requirements (reactive instructions in a regulation dead zone) with small amplitude. For this situation, each control software manufacturer often adopts another strategy, i.e. preferentially adjusts the SVG device with the smallest control dead zone. However, since the reactive telemetry values of the remaining SVG devices in the dead zone are not reliable, this strategy still does not allow for precise adjustment of reactive commands below the control dead zone of the device with the highest starting accuracy.
In a scene requiring reactive compensation in a new energy station, in steady state operation, the upper scheduling can issue a total reactive power instruction to the AVC system. And the AVC system distributes the reactive power instruction to a plurality of SVGs for reactive power compensation. If the reactive power control precision does not meet the control precision requirement, serious assessment can be caused, and fine is generated; in the new energy collection area, as the new energy stations are more, the reactive power control deviation is too large, and the station pulling and stopping risks are also caused. When the total reactive compensation instruction issued by the upper-level dispatching is smaller, the accurate reactive distribution of each SVG cannot be realized.
In summary, in order to improve the accuracy of reactive power distribution of multiple SVGs in a new energy station, the embodiment of the present invention provides a method and an apparatus for reactive power distribution of multiple SVGs in a new energy station.
The invention provides a reactive power distribution method for a plurality of SVGs of a new energy station, which belongs to the technical field of power systems and can be, for example, the reactive power distribution field. Optionally, the reactive power distribution method for a plurality of SVGs of the new energy station is realized in the new energy station. The execution subject of the present invention may be any electronic device capable of implementing the reactive power distribution method of a plurality of SVGs of a new energy station.
The reactive power distribution method and device for a plurality of SVGs of the new energy station are described below with reference to FIGS. 1-3.
Fig. 1 is a flow chart of a reactive power distribution method of a plurality of SVGs in a new energy station, provided by the embodiment of the invention, as shown in fig. 1, and the reactive power distribution method of a plurality of SVGs in a new energy station includes the following steps:
step 101, receiving a reactive power instruction sent by a dispatching system;
specifically, in this step, the AVC system receives a reactive power instruction sent by the upper dispatching system, and for the new energy station, the reactive power instruction is a total reactive power instruction, and the total reactive power instruction is generally smaller, so as to adjust the reactive power of the new energy station to a reactive power value corresponding to the reactive power instruction.
102, determining a dead zone boundary set corresponding to a first numerical value N based on the first numerical value N and the dead zone of SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
specifically, in this step, the first value N refers to the number of SVGs included in the new energy station, that is, the number of SVGs. The allocation method of the embodiment of the invention is applied to the situation that the new energy station contains two or more SVGs, so that the first numerical value is a positive integer greater than or equal to 2. Based on the number of SVGs in the new energy station, N+1 dead zone combinations corresponding to N SVGs are determined, and the N+1 dead zone combinations form a dead zone boundary set.
Step 103, determining an allocation boundary corresponding to the reactive instruction based on the reactive instruction and the dead zone boundary set;
specifically, in this step, based on the reactive instruction issued by the upper dispatching system and the dead zone boundary set including n+1 dead zone combinations, an allocation boundary corresponding to the reactive instruction is determined in the dead zone boundary set.
104, determining an allocation strategy corresponding to the allocation boundary based on the allocation boundary and the reactive instruction;
specifically, n+1 kinds of dead zone combinations in the dead zone boundary set, each dead zone combination corresponds to a different allocation policy, and the allocation policy corresponding to the allocation boundary is determined based on the reactive instruction and the allocation boundary corresponding to the reactive instruction.
And 105, performing reactive power distribution operation on the SVG in the new energy station based on the distribution strategy.
Specifically, in this step, based on the allocation policy corresponding to the reactive instruction determined in the dead zone boundary set, the corresponding allocation policy is executed for the plurality of SVGs in the new energy station.
After receiving a reactive power instruction sent by a dispatching system, the reactive power allocation method for a plurality of SVGs in a new energy station determines a corresponding dead zone boundary set based on the number of SVGs set in the new energy station, wherein the dead zone boundary set comprises a plurality of allocation boundaries, the received reactive power instruction and the determined dead zone boundary set determine the allocation boundary corresponding to the reactive power instruction, each allocation boundary corresponds to one allocation strategy, the corresponding allocation strategy is determined based on the determined allocation boundary and the reactive power instruction, and finally reactive power allocation is performed on the plurality of SVGs in the new energy station based on the allocation strategy. According to the reactive power distribution method for the multiple SVGs in the new energy station, provided by the embodiment of the invention, the adjustment error of the SVGs near the minimum adjustment dead zone is avoided by carrying out rapid dead zone boundary division and combination, and the reactive power accurate adjustment for the multiple SVGs in the new energy station is realized.
Optionally, the method for reactive power distribution of multiple SVGs in the new energy station provided by the embodiment of the present invention specifically includes the following implementation manner in step 102:
based on dead zones of the first numerical value N and SVG, determining a dead zone boundary set corresponding to the first numerical value by adopting a formula (1):
（1）
wherein N is a first value, the dead zone boundary set corresponding to the first value comprises N+1 distribution boundaries,is the dead zone of SVG.
Specifically, by way of example, assuming that N is 4, i.e., 4 SVGs are included in the new energy station, a dead zone boundary set corresponding to n+1 allocation boundaries, i.e., 5 allocation boundaries are included in the dead zone boundary set,for the control dead zone value of a single SVG, when a new energy station contains a plurality of SVGs, the SVGs default to use the same dead zone, namelyWhen 5 SVGs are contained in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4]The method comprises the steps of carrying out a first treatment on the surface of the When 5 SVGs are arranged in the new energy station, corresponding dead zone boundary sets comprising 6 distribution boundaries are [ -5, -3, -1, 3,5]。
According to the reactive power distribution method for the multiple SVGs of the new energy station, provided by the embodiment of the invention, based on the number of SVGs set in the new energy station, the corresponding dead zone boundary set is rapidly determined, and the dead zone boundary combination comprises a plurality of distribution boundaries, so that a foundation is laid for matching of subsequent distribution strategies.
Optionally, the reactive power distribution method for multiple SVGs in the new energy station provided in the embodiment of the present invention further includes, after the step 102:
the dead zone boundary set is divided into positive half-zones, negative half-zones, and zero zones based on the sign of each assigned boundary in the dead zone boundary set.
Specifically, taking the above case as an example, when 4 SVGs are included in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4], the first two allocation boundaries are negative half areas, the third allocation boundary is zero area, and the fourth and fifth allocation boundaries are positive half areas.
According to the reactive power distribution method for the multiple SVGs of the new energy station, a corresponding dead zone boundary set is determined based on the number of SVGs set in the new energy station, the dead zone boundary set comprises a plurality of distribution boundaries, the distribution boundaries in the dead zone boundary set are partitioned into a positive half zone, a negative half zone and a zero zone respectively based on the sign of each respective boundary, and in a subsequent algorithm, a corresponding distribution boundary selection strategy is determined based on the half zone where a reactive power instruction is located.
Optionally, the method for reactive power distribution of multiple SVGs in a new energy station provided by the embodiment of the present invention, a specific implementation manner of step 103 is as follows:
Under the condition that the reactive power instruction belongs to the positive half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (2):
（2）
wherein,is reactive instruction->For the initial value of the iterator, +.>Is the penultimate in dead zone boundary>A plurality of allocation boundaries;
under the condition that the reactive power instruction belongs to the negative half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (3):
（3）
wherein,is the>The distribution boundaries.
In particular, it is illustrated in this step how the corresponding allocation boundaries are determined based on reactive instructions and dead zone boundary sets;
in the case of 4 SVGs provided in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4]The default dead zone values of the 4 SVGs are 1, the acquired reactive power instruction is-3.1 MVar, the reactive power instruction can be determined to belong to the negative half zone of the dead zone boundary combination, and the determination is based on the formula (3)Value, judge reactive instruction Q satisfiesI.e. 2<3<4，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries, i.e. the boundary combination with the dead zone boundary of-2 MVar, is selected.
In the case of 4 SVGs provided in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4 ]The default dead zone values of the 4 SVGs are 1MVar, if the acquired reactive power instruction is 2.5MVar, the reactive power instruction can be determined to belong to the positive half zone with the boundary combination of the dead zones, and the determination is based on the formula (2)Value, judge reactive instruction Q satisfiesI.e. 2<2.5<4，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries is selected, i.e. the boundary combination with the dead zone boundary of-2 MVar is selected.
In the case that 5 SVGs are provided in the new energy station, the corresponding dead zone boundary sets are [ -5, -3, -1, 3,5]The default dead zone values of 5 SVGs are 1MVar, if the acquired reactive power instruction is-4.6 MVar, the reactive power instruction can be determined to belong to the negative half zone of the dead zone boundary combination, and the determination is based on the formula (3)Value, judge reactive instruction Q satisfiesI.e. 3<4.6<5，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries is selected, i.e. the boundary combination with the dead zone boundary of-3 MVar is selected.
In the case that 5 SVGs are provided in the new energy station, the corresponding dead zone boundary sets are [ -5, -3, -1, 3,5]The default dead zone values of 5 SVGs are 1MVar, if the acquired reactive power instruction is-0.6 MVar, the reactive power instruction can be determined to belong to the negative half zone of the dead zone boundary combination, and the determination is based on the formula (3) Value, judge reactive instruction Q satisfiesI.e. 0<0.6<3，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 3 rd allocation boundary of the dead zone boundaries is selected, i.e. the boundary combination with the dead zone boundary of-1 MVar is selected.
According to the reactive power distribution method for the plurality of SVGs in the new energy station, a corresponding dead zone boundary set is determined based on the number of SVGs arranged in the new energy station, the dead zone boundary set comprises a plurality of distribution boundaries, and the distribution boundaries in the dead zone boundary set are partitioned into a positive half zone, a negative half zone and a zero zone based on the sign of each respective boundary, so that different distribution boundary selection strategies are corresponding when reactive power instructions are in the positive half zone and the negative half zone.
Optionally, the method for reactive power distribution of multiple SVGs in the new energy station provided by the embodiment of the present invention, a specific implementation manner of step 104 is as follows:
in the case of reactive instructions belonging to the negative half-zone, the frontStation SVG allocation->Back->Station SVG allocation->；
Calculating a first passive residual allocation value by adopting a formula (4):
（4）
wherein M is the first passive remaining allocation value;
in the case where M is less than zero, assigning M to the first SVG;
In the case where M is greater than zero, M is assigned to the last SVG.
Specifically, the following is further explained based on the above examples: in the case of 4 SVGs provided in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4]The default dead zone values of the 4 SVGs are 1MVar, the acquired reactive power instruction is-3.1 MVar, the reactive power instruction can be determined to belong to the negative half zone of the dead zone boundary combination, and the determination is based on the formula (3)Value, judging reactive instruction Q satisfies +.>I.e. 2<3<4，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries, i.e., the boundary combination with the dead zone boundary of-2, is selected. In this case, the former 3 SVGs are distributed with-1 MVar, the latter 1 SVG is distributed with 1MVar, the first passive residual value M is calculated to be-1.1 MVar, the first passive residual value is distributed to the 1 st SVG because the value of M is smaller than zero, at this time, the reactive value of the 1 st SVG is-2.1 MVar, the distribution is finished, the reactive values of the 4 SVGs in the new energy station are respectively-2.1 MVar, -1MVar, and the sum is the obtained total reactive instruction-3.1 MVar.
In the case that 5 SVGs are provided in the new energy station, the corresponding dead zone boundary sets are [ -5, -3, -1, 3,5 ]The default dead zone values of 5 SVGs are 1MVar, the acquired reactive power instruction is-4.6 MVar, the reactive power instruction can be determined to belong to the negative half zone of the dead zone boundary combination, and the determination is based on the formula (3)Value, judge reactive instruction Q satisfiesI.e. 3<4.6<5，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries is selected, i.e. the boundary combination with the dead zone boundary of-3 MVar is selected. In this case, the first 4 SVGs are allocated with-1 MVar, the last 1 SVG is allocated with 1MVar, then the first reactive residual value M is calculated to be-1.6 MVar, and the first reactive residual value M is allocated to the 1 st SVG because the value of M is smaller than zero, at this time, the reactive value of the 1 st SVG is-2.6 MVar, the allocation is finished, the reactive values of the 5 SVGs in the new energy station are respectively-2.6 MVar, -1MVar, -1MVar, -1MVar, and the sum is the obtained total reactive command-4.6 MVar.
In case the reactive instruction belongs to the positive half-zone, the front partStation SVG allocation->Back->Station SVG allocation->；
Calculating a second reactive residual distribution value by adopting a formula (5):
（5）
wherein Z is a second reactive power remaining distribution value;
in the case where Z is less than zero, assigning Z to the last SVG;
in case Z is greater than zero, Z is assigned to the first SVG.
Specifically, the following is further explained based on the above examples: in the case of 4 SVGs provided in the new energy station, the corresponding dead zone boundary set is [ -4, -2,0,2,4]The default dead zone values of the 4 SVGs are 1MVar, if the acquired reactive power instruction is 2.5MVar, the reactive power instruction can be determined to belong to the positive half zone with the boundary combination of the dead zones, and the determination is based on the formula (2)Value, judging reactive instruction Q satisfies +.>I.e. 2<2.5<4，/>For the initial value of the iterator, if the initial value of the iterator is 0, it can be determined +.>The 2 nd allocation boundary of the dead zone boundaries is selected, i.e. the boundary combination with the dead zone boundary of-2 is selected. In this case, the reactive value of the first 3 SVGs is 1MVar, the reactive value of the last 1 SVG is-1 MVar, then the second reactive residual distribution value Z is calculated to be 0.5MVar, the second reactive residual value is loaded on the 1 st SVG, at this time, the reactive value of the 1 st SVG is 1.5MVar, reactive distribution is finished, the reactive values of the 4 SVGs in the new energy station are respectively 1.5MVar,1MVar, -1MVar, and the reactive sum of the 4 SVGs is the obtained total reactive instruction 2.5MVar.
According to the reactive power distribution method for the plurality of SVGs in the new energy station, a corresponding dead zone boundary set is determined based on the number of SVGs arranged in the new energy station, the dead zone boundary set comprises a plurality of distribution boundaries, and the distribution boundaries in the dead zone boundary set are partitioned into a positive half zone, a negative half zone and a zero zone based on the sign of each respective boundary, so that different distribution boundary selection strategies are corresponding when reactive power instructions are in the positive half zone and the negative half zone. Based on the reactive power instruction and the distribution boundary, a corresponding SVG distribution strategy is determined, and reactive power accurate distribution of a plurality of SVGs in the new energy station is realized.
Optionally, the reactive power distribution method for multiple SVGs in the new energy station provided by the embodiment of the present invention further includes:
and determining a corresponding allocation strategy of the reactive power instruction based on the parity condition of the first numerical value under the condition that the reactive power instruction belongs to the zero zone. The specific distribution mode is as follows:
in the case of even first values, the formerStation SVG allocation->Back->Station SVG allocation->；
In the case of the first value being an odd number, the frontStation SVG allocation->Rear (back)Station SVG allocation->First->Station SVG allocation->Subtracting +.>。
Specifically, the following examples are given in the embodiments of the present invention: if 5 SVGs are arranged in the new energy station, thenDead zone boundary sets corresponding to the n+1 allocation boundaries, namely 6 allocation boundaries are included in the dead zone boundary sets, and the corresponding dead zone boundary sets are [ -5, -3, -1, 3,5]The total reactive power instruction obtained at this time is 0MVar, the reactive power instruction belongs to a zero zone, at this time, the odd-even condition of the first numerical value needs to be judged, 5 is an odd number, the reactive power of the front 2 SVGs is distributed to-1 MVar, the reactive power of the rear 2 SVGs is distributed to 1MVar, the reactive power of the 3 rd SVGs is distributed to 1MVar, the reactive power of the 1 st SVG is subtracted by 1MVar, the reactive power of the 1 st SVG is-2 MVar, the distribution is finished, the reactive powers of the 5 SVGs are respectively-2 MVar, -1MVar, and the sum of the reactive powers of the 5 SVGs is the obtained total reactive power instruction 0MVar. In an embodiment of the present invention, in the present invention, The function returns a value that is the result of the rounding operation to the specified decimal number.
The reactive power distribution method for a plurality of SVGs in a new energy station provided by the embodiment of the invention determines a corresponding dead zone boundary set based on the number of SVGs set in the new energy station, wherein the dead zone boundary set comprises a plurality of distribution boundaries, and then the distribution boundaries in the dead zone boundary set are partitioned into a positive half zone, a negative half zone and a zero zone based on the sign of each respective boundary, when a reactive power instruction is in the zero zone, the reactive power instruction is based onThe function determines the corresponding allocation policy.
Further, in addition, the case where only one SVG is included in the new energy field is described herein, and the case is divided into two implementation strategies. When the current reactive power of the SVG is considered to be credible, the reactive power value of the SVG is Q1, the reactive power instruction received by the new energy station is subtracted by Q1, the reactive power value of the new energy station unit is overlapped, the value is distributed to the unit, and under the condition that the SVG is not regulated. When the current reactive value of the SVG is not trusted, the SVG is firstly regulated to a dead zone, and when the reactive instruction received by the new energy station is less than zero, the SVG is distributed to-e, and the reactive of the unit is distributed to e; and when the reactive power instruction received by the new energy station is greater than zero and smaller than e, the SVG distributes e and the unit reactive power distribution is-e.
The reactive power distribution device of the plurality of SVGs of the new energy station provided by the invention is described below, and the reactive power distribution device of the plurality of SVGs of the new energy station described below and the reactive power distribution method of the plurality of SVGs of the new energy station described above can be correspondingly referred to each other. Fig. 2 is a schematic structural diagram of a reactive power distribution apparatus for a plurality of SVGs in a new energy station, provided by the present invention, as shown in fig. 2, including:
a receiving module 201, configured to receive a reactive instruction sent by a dispatching system;
a first determining module 202, configured to determine a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and the SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
a second determining module 203, configured to determine an allocation boundary corresponding to the reactive instruction based on the reactive instruction and the dead zone boundary set;
a third determining module 204, configured to determine, based on the allocation boundary and the reactive instruction, an allocation policy corresponding to the allocation boundary;
And the allocation module 205 is used for executing reactive allocation operation on the SVG in the new energy station based on the allocation strategy.
The reactive power distribution device for the plurality of SVGs in the new energy station provided by the embodiment of the invention realizes the accurate distribution of the reactive power of the plurality of SVGs in the new energy station through the mutual coordination of the modules. Specifically, after a reactive power instruction sent by a dispatching system is received, a corresponding dead zone boundary set is determined based on the number of SVGs set in a new energy station, the dead zone boundary set comprises a plurality of distribution boundaries, the distribution boundaries corresponding to the reactive power instruction are determined through the received reactive power instruction and the determined dead zone boundary set, each distribution boundary corresponds to one distribution strategy, the corresponding distribution strategy is determined based on the determined distribution boundaries and the reactive power instruction, and finally reactive power distribution is performed on a plurality of SVGs in the new energy station based on the distribution strategy. According to the reactive power distribution method for the multiple SVGs in the new energy station, provided by the embodiment of the invention, the adjustment error of the SVGs near the minimum adjustment dead zone is avoided by carrying out rapid dead zone boundary division and combination, and the reactive power accurate adjustment for the multiple SVGs in the new energy station is realized.
Optionally, the first determining module is specifically configured to determine, based on the dead zones of the first value N and the SVG, a dead zone boundary set corresponding to the first value using formula (1):
（1）
wherein N is a first value, the dead zone boundary set corresponding to the first value comprises N+1 distribution boundaries,is the dead zone of SVG.
The first determination module is further to divide the dead zone boundary set into a positive half-zone, a negative half-zone, and a zero zone based on the sign of each assigned boundary in the dead zone boundary set.
The second determining module is specifically configured to determine, when the reactive instruction belongs to the positive half area, an allocation boundary corresponding to the reactive instruction by using formula (2):
（2）
wherein,is reactive instruction->For the initial value of the iterator, +.>Is the penultimate in dead zone boundary>A plurality of allocation boundaries;
under the condition that the reactive power instruction belongs to the negative half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (3):
（3）
wherein,is the>The distribution boundaries.
The third determination module is specifically configured to, in case the reactive instruction belongs to the negative half-zone, forwardStation SVG allocation->Back->Station SVG allocation->；
Calculating a first passive residual allocation value by adopting a formula (4):
（4）/>
wherein M is the first passive remaining allocation value;
In the case where M is less than zero, assigning M to the first SVG;
in the case where M is greater than zero, M is assigned to the last SVG.
In case the reactive instruction belongs to the positive half-zone, the front partStation SVG allocation->Back->Station SVG allocation->；
Calculating a second reactive residual distribution value by adopting a formula (5):
（5）
wherein Z is a second reactive power remaining distribution value;
in the case where Z is less than zero, assigning Z to the last SVG;
in case Z is greater than zero, Z is assigned to the first SVG.
The third determining module is further configured to determine, in a case where the reactive instruction belongs to the null zone, a corresponding allocation policy of the reactive instruction based on a parity of the first value.
Fig. 3 is a schematic structural diagram of an electronic device according to the present invention, and fig. 3 illustrates a schematic physical structural diagram of an electronic device, where, as shown in fig. 3, the electronic device may include: processor 310, communication interface (Communications Interface) 320, memory 330 and communication bus 340, wherein processor 310, communication interface 320, memory 330 accomplish communication with each other through communication bus 340. Processor 310 may invoke logic instructions in memory 330 to perform the reactive power distribution method of the plurality of SVGs of the new energy site described above, the method comprising: receiving a reactive power instruction sent by a dispatching system; determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2; determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set; determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction; and based on the allocation strategy, performing reactive allocation operation on the SVG in the new energy station.
Further, the logic instructions in the memory 330 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program when executed by a processor can perform a reactive power distribution method for a plurality of SVGs in a new energy station provided by the above methods, where the method includes: receiving a reactive power instruction sent by a dispatching system; determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2; determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set; determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction; and based on the allocation strategy, performing reactive allocation operation on the SVG in the new energy station.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a reactive power distribution method for a plurality of SVGs of a new energy station provided by the above methods, the method comprising: receiving a reactive power instruction sent by a dispatching system; determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of the SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2; determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set; determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction; and based on the allocation strategy, performing reactive allocation operation on the SVG in the new energy station.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A reactive power distribution method for a plurality of SVGs of a new energy station is characterized by comprising the following steps:
receiving a reactive power instruction sent by a dispatching system;
determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set;
determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction;
based on the allocation strategy, performing reactive allocation operation on each SVG in the new energy station;
the dead zone determining set corresponding to the first value N based on the first value N and the dead zone of the SVG includes:
based on the dead zone of the first numerical value N and SVG, determining a dead zone boundary set corresponding to the first numerical value by adopting a formula (1):
（1）
wherein N is the first value, anThe dead zone boundary set corresponding to the first value comprises n+1 distribution boundaries, Dead zone for the SVG;
after the dead zone boundary set corresponding to the first value N is determined based on the dead zone of the first value N and the SVG, the method further includes:
dividing the dead zone boundary set into a positive half zone, a negative half zone and a zero zone based on the sign of each allocation boundary in the dead zone boundary set;
the determining, based on the reactive instruction and the dead zone boundary set, an allocation boundary corresponding to the reactive instruction includes:
and under the condition that the reactive power instruction belongs to the positive half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (2):
（2）
wherein,for the reactive instruction, +_>For the initial value of the iterator, +.>For the penultimate +.>A plurality of allocation boundaries;
and under the condition that the reactive power instruction belongs to the negative half zone, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (3):
（3）
wherein,for the +.>The distribution boundaries.
2. The reactive power distribution method of a plurality of SVGs in a new energy station according to claim 1, wherein said determining, based on said distribution boundary and said reactive power instruction, a distribution policy corresponding to said distribution boundary comprises:
In the case of the reactive order belonging to the negative half-zone, the front partStation SVG allocation->Back->Station SVG allocation->；
Calculating a first passive residual allocation value by adopting a formula (4):
（4）
wherein M is the first passive remaining allocation value;
in the case where M is less than zero, assigning M to the first SVG;
in the case where M is greater than zero, M is assigned to the last SVG.
3. The reactive power distribution method of a plurality of SVGs in a new energy station according to claim 1, further comprising:
in the case that the reactive instruction belongs to the positive half zone, the front partStation SVG allocation->Back->Station SVG allocation- & gt>；
Calculating a second reactive residual distribution value by adopting a formula (5):
（5）
wherein Z is the second reactive residual allocation value;
in the case where Z is less than zero, assigning Z to the last SVG;
in case Z is greater than zero, Z is assigned to the first SVG.
4. The reactive power distribution method of a plurality of SVGs in a new energy station according to claim 1, further comprising:
and determining a corresponding allocation strategy of the reactive power instruction based on the parity condition of the first numerical value under the condition that the reactive power instruction belongs to the zero zone.
5. The reactive power distribution method of multiple SVGs in a new energy site according to claim 4, wherein said determining a corresponding distribution strategy for said reactive power instruction based on parity of said first value comprises:
in case said first value is even, the first value isStation SVG allocation->Back->Station SVG allocation；
In the case where the first value is odd, the frontStation SVG allocation->Rear (back)Station SVG allocation->First->Station SVG allocation->Subtracting +.>。
6. Reactive power distribution device for distributing reactive power of a plurality of SVGs of a new energy station, comprising:
the receiving module is used for receiving the reactive power instruction sent by the dispatching system;
the first determining module is used for determining a dead zone boundary set corresponding to a first numerical value N based on the dead zones of the first numerical value N and the SVG; the dead zone boundary set comprises at least one distribution boundary; the first numerical value N is used for representing the number of SVGs arranged in the new energy station; n is a positive integer greater than or equal to 2;
the second determining module is used for determining an allocation boundary corresponding to the reactive power instruction based on the reactive power instruction and the dead zone boundary set;
The third determining module is used for determining a distribution strategy corresponding to the distribution boundary based on the distribution boundary and the reactive instruction;
the distribution module is used for executing reactive power distribution operation on each SVG in the new energy station based on the distribution strategy;
the dead zone determining set corresponding to the first value N based on the first value N and the dead zone of the SVG includes:
based on the dead zone of the first numerical value N and SVG, determining a dead zone boundary set corresponding to the first numerical value by adopting a formula (1):
（1）
wherein N is the first value, the dead zone boundary set corresponding to the first value comprises N+1 distribution boundaries,dead zone for the SVG;
the dead zone based on the first value N and the SVG, after determining the dead zone boundary set corresponding to the first value N, further includes:
dividing the dead zone boundary set into a positive half zone, a negative half zone and a zero zone based on the sign of each allocation boundary in the dead zone boundary set;
the determining, based on the reactive instruction and the dead zone boundary set, an allocation boundary corresponding to the reactive instruction includes:
and under the condition that the reactive power instruction belongs to the positive half area, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (2):
（2）
Wherein,for the reactive instruction, +_>For the initial value of the iterator, +.>For the penultimate +.>A plurality of allocation boundaries;
and under the condition that the reactive power instruction belongs to the negative half zone, determining a distribution boundary corresponding to the reactive power instruction by adopting a formula (3):
（3）
wherein,for the +.>The distribution boundaries.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the reactive distribution method of a plurality of SVGs of a new energy site as claimed in any one of claims 1 to 5 when the program is executed by the processor.
8. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements a reactive distribution method of a plurality of SVGs of a new energy station according to any one of claims 1 to 5.
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