CN116316670A - Reactive power control method and device for distributed camera of new energy station - Google Patents

Reactive power control method and device for distributed camera of new energy station Download PDF

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Publication number
CN116316670A
CN116316670A CN202310540176.5A CN202310540176A CN116316670A CN 116316670 A CN116316670 A CN 116316670A CN 202310540176 A CN202310540176 A CN 202310540176A CN 116316670 A CN116316670 A CN 116316670A
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reactive power
distributed
new energy
reactive
instruction
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CN116316670B (en
Inventor
梁浩
谢欢
秦川
李长宇
赵天骐
梁倍华
张广韬
赵焱
郝婧
罗婧
王泽森
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
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State Grid Corp of China SGCC
North China Electric Power Research Institute 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
    • H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • 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)
  • Control Of Electrical Variables (AREA)

Abstract

The invention provides a reactive power control method and device for a distributed camera of a new energy station, and relates to the technical field of control. The method comprises the following steps: acquiring a new energy unit reactive power instruction, an SVG reactive power instruction, a distributed phase regulator reactive power instruction, a new energy unit reactive power initial value and an SVG reactive power initial value; determining compensation reactive power according to the new energy unit reactive power instruction, the new energy unit reactive power initial value, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction according to the compensation reactive power and the distributed phase-change regulator reactive power instruction; and obtaining the voltage variation of the machine end according to the reactive current value, the final reactive instruction and the conversion coefficient, superposing the voltage variation of the machine end to the voltage given value of the machine end, and performing reactive control of the adjusting distributed type tuner. The apparatus performs the above method. The method and the device provided by the embodiment of the invention can improve the reactive power control precision of the distributed camera.

Description

Reactive power control method and device for distributed camera of new energy station
Technical Field
The invention relates to the technical field of control, in particular to a reactive power control method and device for a distributed camera for adjusting a new energy station.
Background
Along with the continuous high-speed increase of the installed capacity and the duty ratio of the new energy, the near area of the new energy base is lack of supporting power supply, the dynamic reactive power supporting capability of the sending-out system is weaker, the problem of voltage stability is remarkable, and the outward sending capability of the new energy station is greatly limited. The supporting of the popularization of the deployment of the distributed cameras of the new energy station is particularly important to improve the short-circuit capacity supporting capability of the new energy station to the power grid.
Besides the problems of improving short-circuit capacity during power system faults and inhibiting transient state over/low voltage of a new energy station, the distributed type phase regulator is also connected with a new energy station automatic voltage control system (Automatic Voltage Control, AVC) to serve as reactive power sources, a new energy unit, a dynamic reactive power compensation device (Static Var Generator, SVG) and other equipment to perform reactive power output regulation on the reactive power equipment of the new energy station according to an AVC substation regulation strategy, so that bus voltage of a grid-connected point is regulated to a command value issued by power grid dispatching.
As shown in fig. 1, at present, a new energy unit and an SVG adopt a fixed reactive power control mode, a reactive power control instruction is issued by an AVC substation, and reactive closed loop adjustment of the new energy unit and the SVG is realized; after the distributed type phase-change regulator is connected with the AVC substation, the reactive power control link is overlapped on the basis of the voltage control mode of the fixed terminal of the distributed type phase-change regulator, the reactive power control link can be realized in the excitation regulator of the distributed type phase-change regulator, and can also be realized in the AVC substation, and the reactive power control link receives the reactive power instruction issued by the AVC substation to realize reactive power closed-loop regulation of the distributed type phase-change regulator.
As shown in fig. 2, when the voltage of the equipment is limited due to the failure of the system, the new energy unit and the SVG equipment can automatically switch the control strategy, such as a high-low penetration strategy, a constant voltage control strategy and the like, so that the reactive voltage command of the AVC substation is temporarily shielded, and the reactive control and the voltage control series mode adopted by the distributed phase regulator play a role in regulating the reactive control and the voltage control after the failure of the system, so that the distributed phase regulator cannot realize the constant voltage regulation in the whole process, especially when the operation working condition of the system changes before and after the failure, the steady-state operation reactive power regulated by the phase regulator is inconsistent with that before the failure, but the reactive command before the failure of the AVC substation is still received, so that the phase regulator still enters the reactive closed-loop control after the failure, and the regulation characteristic of the constant voltage at the machine end cannot be maintained.
If the distributed type dispatching machine simply refers to the control mode that a conventional synchronous generator set is connected to an AVC substation of a power plant, namely, a generator excitation regulator does not adopt a reactive control link, a reactive instruction distributed by the AVC substation to a generator is converted into a voltage instruction which increases and decreases magnetic pulse width signals and directly acts on a voltage control link, when the AVC of a new energy station regulates new energy sets and SVG equipment, the distributed type dispatching machine can have reactive reverse flow, namely, reactive power sent by the new energy sets and SVG does not flow to grid-connected points completely, and a part of reactive power is shunted to the dispatching machine of the same bus, so that the AVC regulation speed is easy to be unsatisfied, and the AVC regulation qualification rate is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a reactive power control method and device for a distributed camera for adjusting a new energy station, which can solve the problems in the prior art.
On one hand, the invention provides a reactive power control method for a distributed camera for regulating a new energy station, which comprises the following steps:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
The method for determining the reactive power of the distributed type phase regulator comprises the steps of determining the reactive power of the required compensation of the distributed type phase regulator according to a new energy unit reactive power instruction, a new energy unit reactive power initial value, an SVG reactive power instruction, an SVG reactive power initial value and a compensation coefficient, and comprises the following steps:
calculating a difference value between a new energy unit reactive power instruction and a new energy unit reactive power initial value to obtain a new energy unit reactive power variation, and calculating a difference value between an SVG reactive power instruction and an SVG reactive power initial value to obtain an SVG reactive power variation;
and adding the reactive variable quantity of the new energy unit and the SVG reactive variable quantity, and multiplying the added reactive variable quantity by a compensation coefficient to obtain reactive power required to be compensated by the distributed type phase-change regulator.
The method for determining the final reactive power instruction of the distributed camera according to the reactive power required to be compensated by the distributed camera and the reactive power instruction of the distributed camera comprises the following steps:
and adding the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera to obtain the final reactive power instruction of the distributed type camera.
The per unit processing is performed according to the reactive current value of the distributed camera and the final reactive instruction, and the per unit processing comprises the following steps:
and calculating a difference value between the final reactive power instruction and the reactive power current value of the distributed type dispatching machine, and dividing the difference value result by the capacity of the distributed type dispatching machine to obtain a per unit processing result.
The method for obtaining the voltage variation of the machine terminal according to the per unit processing result and the conversion coefficient comprises the following steps:
and multiplying the per unit processing result by the conversion coefficient to obtain the voltage variation of the machine terminal.
The reactive power control method for the distributed camera of the new energy station further comprises presetting compensation coefficients, and specifically comprises the following steps:
step disturbance is applied to the reactive power instruction of the new energy unit or the SVG reactive power instruction, and the reactive power variation of the SVG or the reactive power variation of the new energy unit and the reactive power variation of the distributed phase regulator are recorded respectively;
determining the ratio of the reactive variable quantity of the distributed type camera to the reactive variable quantity of the SVG or the reactive variable quantity of the new energy unit as a compensation coefficient test value;
repeatedly executing step disturbance and subsequent steps to the new energy unit reactive power instruction or the SVG reactive power instruction to obtain a plurality of compensation coefficient test values equal to the first preset number;
and averaging the test values of the compensation coefficients to obtain the set compensation coefficient.
The reactive power control method for the distributed camera of the new energy station further comprises the step of presetting a conversion coefficient, and specifically comprises the following steps:
step disturbance is applied to the voltage command of the machine end of the distributed type camera, and the change of the voltage of the machine end of the distributed type camera and the change of reactive power of the distributed type camera are recorded respectively;
Determining the ratio of the voltage variation of the machine end of the distributed type camera to the reactive power variation of the distributed type camera as a calculation coefficient test value;
repeatedly executing step disturbance and subsequent steps on the voltage command of the distributed camera terminal to obtain a plurality of calculation coefficient test values equal to a second preset number;
and averaging the plurality of calculation coefficient test values to obtain the set calculation coefficient.
In one aspect, the invention provides a reactive power control device for a distributed camera for adjusting a new energy station, which comprises:
the acquisition unit is used for acquiring a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by the AVC substation, and acquiring a new energy unit reactive power initial value and an SVG reactive power initial value;
the determining unit is used for determining the reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive initial value of the new energy unit, the SVG reactive instruction, the SVG reactive initial value and the compensation coefficient, and determining the final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and the control unit is used for carrying out per unit processing according to the reactive current value of the distributed camera and the final reactive instruction, obtaining the voltage variation of the machine end according to the per unit processing result and the conversion coefficient, superposing the voltage variation of the machine end to the given value of the machine end voltage through the magnetism increasing/decreasing signal, and carrying out reactive control of the distributed camera according to the superposed given value of the machine end voltage, the current value of the machine end voltage and the excitation closed-loop control system of the distributed camera.
In yet another aspect, an embodiment of the present invention provides a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following method when executing the computer program:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
An embodiment of the present invention provides a computer-readable storage medium including:
the computer readable storage medium stores a computer program which, when executed by a processor, performs the following method:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
The reactive control method and the reactive control device for the distributed type camera of the new energy station provided by the embodiment of the invention collect the reactive instruction of the new energy unit, the reactive instruction of SVG and the reactive instruction of the distributed type camera which are issued by the AVC substation, and acquire the reactive initial value of the new energy unit and the reactive initial value of SVG; determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera; and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system, and improving reactive control precision of the distributed type camera.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
fig. 1 is a schematic diagram of a new energy unit, an SVG and a distributed type camera for receiving reactive power instructions of an AVC substation to realize voltage control of a grid connection point bus of a new energy station in the prior art.
Fig. 2 is a schematic diagram of a reactive closed loop control link access voltage control main loop of a distributed phase regulator in the prior art.
Fig. 3 is a schematic flow chart of a reactive power control method for adjusting a distributed camera of a new energy station according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of reactive control logic of a distributed camera accessing AVC system according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a reactive open loop control link access terminal voltage control main loop of a distributed phase-change modulator according to an embodiment of the present invention.
FIG. 6 is a graph showing the comparison of adjustment characteristics of a distributed phase adjuster under three control strategies under SVG reactive power disturbance conditions according to an embodiment of the present invention.
Fig. 7 is a graph comparing AVC adjustment characteristics in a conventional manner and in a manner of the present invention.
Fig. 8 is a schematic structural diagram of a reactive power control device for adjusting a distributed camera of a new energy station according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of a physical structure of a computer device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
Fig. 3 is a flow chart of a reactive control method for adjusting a distributed camera of a new energy station according to an embodiment of the present invention, as shown in fig. 3, where the reactive control method for adjusting a distributed camera of a new energy station according to an embodiment of the present invention includes:
step S1: and acquiring a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by the AVC substation, and acquiring a new energy unit reactive power initial value and an SVG reactive power initial value.
Step S2: and determining the reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive initial value of the new energy unit, the SVG reactive instruction, the SVG reactive initial value and the compensation coefficient, and determining the final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera.
Step S3: and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
In the step S1, the device collects a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed regulator reactive power instruction issued by the AVC substation, and obtains a new energy unit reactive power initial value and an SVG reactive power initial value. The apparatus may be a computer device or the like, for example a server, performing the method. In the technical scheme, the acquisition, storage, use, processing and the like of the data all accord with related regulations.
As shown in FIG. 4, the acquisition variable is the reactive power instruction of the new energy unit issued by the AVC substationQ refNE SVG reactive power instructionQ refSVG And distributed camera reactive instructionsQ refDC And the reactive power initial value of the new energy unit before the new energy station is put into the AVC systemQ NE0 Reactive initial value of SVGQ SVG0 。
The distributed phase regulator of the AVC system is accessed to be controlled by the voltage of the fixed machine end, when the AVC system of the new energy station issues a reactive power instruction or SVG reactive power instruction of the new energy unit and regulates the reactive power, the regulated reactive power can form reactive circulation between the distributed phase regulator on the same bus and the SVG and the new energy unit, namely the reactive power issued by the instructionThe power cannot fully support the change of the bus voltage, and a part of the power can be absorbed or sent out by the camera. Therefore, when the new energy unit or the SVG is regulated by following the AVC reactive power instruction, additional reactive power compensation is needed for the regulating camera to eliminate the circulation phenomenon, and the reactive power of the compensation depends on the current reactive power instruction of the new energy unit and the SVGQ refNE 、Q refSVG Reactive initial value of new energy unit and SVG before AVC system is put into operationQ NE0 、Q SVG0 。
In the step S2, the device determines the reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive initial value of the new energy unit, the SVG reactive instruction, the SVG reactive initial value and the compensation coefficient, and determines the final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera. When the control parameters are new energy units and SVG equipment for adjusting reactive power, the reactive power compensation coefficient of the distributed type phase-change modulator K com And a conversion coefficient between reactive power and terminal voltage of the distributed phase-change modulatorK QU 。
The method for determining the reactive power required to be compensated by the distributed type phase regulator according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient comprises the following steps:
calculating a difference value between a new energy unit reactive power instruction and a new energy unit reactive power initial value to obtain a new energy unit reactive power variation, and calculating a difference value between an SVG reactive power instruction and an SVG reactive power initial value to obtain an SVG reactive power variation;
and adding the reactive variable quantity of the new energy unit and the SVG reactive variable quantity, and multiplying the added reactive variable quantity by a compensation coefficient to obtain reactive power required to be compensated by the distributed type phase-change regulator. By combiningQ refNE And (3) withQ NE0 、Q refSVG And (3) withQ SVG0 Respectively making difference to obtain reactive power variation delta of new energy unit and SVGQ NE 、ΔQ SVG Then the reactive variable quantity of the two is added and then multiplied by the compensation coefficientK com As required for distributed camera adjustmentAnd compensating reactive power.
The determining of the final reactive power instruction of the distributed camera according to the reactive power required to be compensated by the distributed camera and the reactive power instruction of the distributed camera comprises the following steps:
and adding the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera to obtain the final reactive power instruction of the distributed type camera. Issuing the reactive power and AVC to reactive instructions of a distributed phase regulator Q refDC Adding to obtain the final reactive power instruction of the distributed cameraQ refDCnew 。
In the step S3, the device performs per unit processing according to the reactive current value of the distributed camera and the final reactive instruction, obtains the voltage variation of the machine terminal according to the per unit processing result and the conversion coefficient, superimposes the voltage variation of the machine terminal on the given value of the machine terminal voltage through the increasing/decreasing magnetic signal, and performs reactive control of the distributed camera according to the superimposed given value of the machine terminal voltage, the current value of the machine terminal voltage and the excitation closed-loop control system of the distributed camera. And carrying out per unit processing according to the reactive current value of the distributed camera and the final reactive instruction, wherein the per unit processing comprises the following steps:
and calculating a difference value between the final reactive power instruction and the reactive power current value of the distributed type dispatching machine, and dividing the difference value result by the capacity of the distributed type dispatching machine to obtain a per unit processing result. As shown in FIG. 5, to cancel the existing reactive outer loop closed loop control, a stator voltage control is adopted to firstly make the final reactive instruction after compensationQ refDCnew Reactive current value of distributed cameraQ DC After the difference is made, carrying out per unit treatment, which specifically comprises the following steps:
dividing the difference result by the capacity of the distributed cameraS NDC And obtaining a per unit processing result.
The obtaining the voltage variation of the machine terminal according to the per unit processing result and the conversion coefficient comprises the following steps:
and multiplying the per unit processing result by the conversion coefficient to obtain the voltage variation of the machine terminal. Multiplying the per unit processing result by the conversion coefficient between reactive power and terminal voltageK QU Converting reactive power instruction into corresponding machine end voltage variation
Figure SMS_1
U t Combine->
Figure SMS_2
U t Is added to the set value of the voltage at the machine end through the addition/subtraction of magnetic signalsU ref I.e. each time an AVC instruction issues, ifQ refDCnew >Q DC Then send out a single magnetization signal, and superimpose +.>
Figure SMS_3
U t To the point ofU ref The method comprises the steps of carrying out a first treatment on the surface of the If it isQ refDCnew <Q DC Then send out single demagnetizing signal, and superimpose +.>
Figure SMS_4
U t To the point ofU ref The method comprises the steps of carrying out a first treatment on the surface of the If it isQ refDCnew =Q DC No signal is sent.
According to the superimposed set value of the machine terminal voltageU ref Voltage at machine endU t The distributed camera reactive control is carried out by the (real-time change of the numerical value) and the distributed camera excitation closed-loop control system, so that the reactive power of a control and regulation unit is realized, and finally the excitation voltage is outputU f 。
The reactive power control method for the distributed camera of the new energy station further comprises the steps of presetting compensation coefficients, and specifically comprises the following steps:
step disturbance is applied to the reactive power instruction of the new energy unit or the SVG reactive power instruction, and the reactive power variation of the SVG or the reactive power variation of the new energy unit and the reactive power variation of the distributed phase regulator are recorded respectively;
Determining the ratio of the reactive variable quantity of the distributed type camera to the reactive variable quantity of the SVG or the reactive variable quantity of the new energy unit as a compensation coefficient test value;
repeatedly executing reactive power instruction or SVG reactive power instruction of new energy unitStep disturbance is added, and subsequent steps are carried out, so that a plurality of compensation coefficient test values which are equal to a first preset number are obtained; a first preset number ofNCan be set autonomously according to actual conditions.
And averaging the test values of the compensation coefficients to obtain the set compensation coefficient.
The concrete explanation is as follows:
reactive power compensation coefficient of distributed phase-regulating machineK com The setting method comprises the following steps:
1. the new energy station exits the AVC system, and the new energy unit, the SVG and the distributed camera operate stably. Wherein the new energy unit and SVG are fixed reactive power control modes, and the distributed phase regulator is fixed terminal voltage control mode.
2. Performing reactive power instruction step disturbance of SVG or new energy unit, taking SVG as an example, and performing reactive power instructionQ refSVG1 Becomes as followsQ refSVG2 Recording reactive change delta of SVGQ SVG And reactive variation delta of distributed cameraQ DC 。
3. Calculating reactive power compensation coefficient according to the following formulaK com ：
K com =ΔQ DC /ΔQ SVG
4. Repeating tests 2 and 3, and calculatingNSecondary reactive power compensation coefficientK com1 ，K com2 ，…，K comN And obtaining the set compensation coefficient after averaging.
The reactive power control method for the distributed camera of the new energy station further comprises the step of presetting a conversion coefficient, and specifically comprises the following steps:
step disturbance is applied to the voltage command of the machine end of the distributed type camera, and the change of the voltage of the machine end of the distributed type camera and the change of reactive power of the distributed type camera are recorded respectively;
determining the ratio of the voltage variation of the machine end of the distributed type camera to the reactive power variation of the distributed type camera as a calculation coefficient test value;
repeatedly executing step disturbance and subsequent steps on the voltage command of the distributed camera terminal to obtain a plurality of calculation coefficient test values equal to a second preset number; the second preset number M may be set autonomously according to the actual situation.
And averaging the plurality of calculation coefficient test values to obtain the set calculation coefficient.
The concrete explanation is as follows:
conversion coefficient between reactive power and terminal voltage of distributed phase-change modulatorK QU The setting method comprises the following steps:
1. the new energy station exits the AVC system, and the new energy unit, the SVG and the distributed camera operate stably. Wherein the new energy unit and SVG are fixed reactive power control modes, and the distributed phase regulator is fixed terminal voltage control mode.
2. Step disturbance of voltage command at the machine end of the distributed camera is carried out, and the voltage command at the machine end is obtained from U refDC1 Becomes as followsU refDC2 Recording the voltage variation delta of the terminal of the distributed cameraU DC Reactive power variation delta of distributed cameraQ DC 。
3. Calculating the conversion coefficient between reactive power and terminal voltage according to the following formulaK QU ：
K QU =ΔU DC /ΔQ DC
4. Repeating tests 2 and 3, and calculatingMSub-conversion coefficientK QU1 ，K QU2 ，…，K QUM And obtaining the conversion coefficient after the average is calculated.
The following describes the test effect of the reactive power control method for the distributed camera of the new energy field station:
as shown in fig. 6, test content 1: and exiting the AVC system, wherein the operation of the phase-change machine, the fan and the SVG are in grid-connected operation, the operation is initially 0Mvar, the reactive power instruction of the SVG is changed from 0Mvar to 10Mvar, and the reactive power regulation characteristic of the distributed phase-change machine is observed under the mode of setting reactive power (the middle line of three lines), the mode of setting machine terminal voltage (the lower line of three lines) and the mode of setting machine terminal voltage (the upper line of three lines) with the compensation strategy.
Note that:U Ht 220kV bus voltage, unit kV;U t for the voltage at the camera terminal, unit p.u.;Q t for regulating the reactive power of the camera, unit Mvar.
Conclusion of the test:
(1) Under the condition that the voltage mode of the fixed machine end of the phase-change regulator operates, if a patent method is not adopted, a compensation strategy of an SVG regulation process is not adopted, when the SVG regulates reactive power, the phase-change regulator is controlled by the voltage of the fixed machine end, the reactive power of the phase-change regulator is reversely regulated, and the voltage regulation amplitude of the 220kV bus is smaller than the regulation amplitude when the phase-change regulator operates in the fixed reactive power mode, as shown by the lower line of three lines in fig. 6.
(2) Under the condition that the voltage mode of the machine end of the machine is set, if a patent method is adopted, a compensation strategy for the reactive power of the machine end of the machine is put into the SVG regulation process, when the reactive power is regulated by the SVG, the change quantity is increased in the same direction at a given point of the machine end voltage of the machine end of the machine, so that the machine end of the machine is compensated for reactive reverse circulation under the condition of the fixed voltage operation, the initial reactive power of the machine end of the machine before the SVG regulation, namely 0Mvar, and the machine end voltage and the bus voltage of 220kV all reach the AVC regulation effect under the condition that the machine end of the machine is set to the reactive power mode (middle line of three lines) operation, as shown by the upper line of the three lines in fig. 6.
As shown in fig. 7, test content 2: the AVC system is put into the system, the operation of the phase-change machine, the fan and the SVG are in grid-connected operation, the operation is 0Mvar initially, a priority strategy is adopted, namely, the SVG- & gtphase-change machine- & gtfan, the 220kV bus voltage command is changed from 223.50kV to 229.00kV, and the reactive power regulation characteristics of the distributed phase-change machine and bus voltage are observed under the condition that the conventional phase-change machine adopts a fixed reactive power control mode (lower lines of two lines) and the compensating strategy provided by the invention is used for fixing the terminal voltage mode (upper lines of two lines).
Note that:U Ht 220kV bus voltage, unit kV; Q w The reactive power of the fan is the unit Mvar;Q s the unit is SVG reactive power, mvar;U t for regulating camera terminal voltage, unit p.u.;Q t for regulating the reactive power of the camera, unit Mvar.
Conclusion of the test:
according to the method, when the AVC adjusts reactive power through the SVG and the fan, the change quantity is increased in the same direction at a set-end voltage given point of the camera, so that the camera compensates reactive reverse circulation under constant voltage operation, the initial camera reactive power before adjustment is maintained, and the AVC adjusting effect (lower lines of two lines) under the set reactive mode operation of the camera is achieved by the set-end voltage and 220kV bus voltage (upper lines of two lines).
The invention provides a control method for accessing a distributed camera of a new energy station into an AVC system, which cancels the reactive closed-loop control link of the existing distributed camera, converts the reactive instruction distributed by an AVC substation into a set-end voltage given instruction to act on the voltage control link, designs a compensation strategy for the distributed camera when a new energy unit and SVG regulate reactive power in order to avoid reactive reverse flow in a set-end voltage control mode, has simple and reliable control method and convenient setting of control parameters, ensures the overall process constant voltage control of the distributed camera, provides short circuit capacity of the system, solves the problems of transient voltage suppression and the like, meets the regulation speed of the AVC system, prevents reactive circulation problem of various devices of the new energy station, and plays the role of voltage regulation and support of the distributed camera in the whole process.
According to the distributed camera reactive control method for regulating the new energy station, which is provided by the embodiment of the invention, a new energy unit reactive instruction, an SVG reactive instruction and a distributed camera reactive instruction issued by an AVC substation are collected, and a new energy unit reactive initial value and an SVG reactive initial value are obtained; determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera; and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system, and improving reactive control precision of the distributed type camera.
Further, determining the reactive power required to be compensated by the distributed type phase regulator according to the new energy unit reactive power instruction, the new energy unit reactive power initial value, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, including:
calculating a difference value between a new energy unit reactive power instruction and a new energy unit reactive power initial value to obtain a new energy unit reactive power variation, and calculating a difference value between an SVG reactive power instruction and an SVG reactive power initial value to obtain an SVG reactive power variation; the description of the embodiments may be referred to above, and will not be repeated.
And adding the reactive variable quantity of the new energy unit and the SVG reactive variable quantity, and multiplying the added reactive variable quantity by a compensation coefficient to obtain reactive power required to be compensated by the distributed type phase-change regulator. The description of the embodiments may be referred to above, and will not be repeated.
Further, the determining a final reactive power instruction of the distributed camera according to the reactive power required to be compensated by the distributed camera and the reactive power instruction of the distributed camera includes:
and adding the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera to obtain the final reactive power instruction of the distributed type camera. The description of the embodiments may be referred to above, and will not be repeated.
Further, the performing per unit processing according to the reactive current value of the distributed camera and the final reactive instruction includes:
And calculating a difference value between the final reactive power instruction and the reactive power current value of the distributed type dispatching machine, and dividing the difference value result by the capacity of the distributed type dispatching machine to obtain a per unit processing result. The description of the embodiments may be referred to above, and will not be repeated.
Further, the obtaining the voltage variation of the machine terminal according to the per unit processing result and the conversion coefficient includes:
and multiplying the per unit processing result by the conversion coefficient to obtain the voltage variation of the machine terminal. The description of the embodiments may be referred to above, and will not be repeated.
Further, the reactive power control method for the distributed camera of the new energy station further comprises presetting compensation coefficients, and specifically comprises the following steps:
step disturbance is applied to the reactive power instruction of the new energy unit or the SVG reactive power instruction, and the reactive power variation of the SVG or the reactive power variation of the new energy unit and the reactive power variation of the distributed phase regulator are recorded respectively; the description of the embodiments may be referred to above, and will not be repeated.
Determining the ratio of the reactive variable quantity of the distributed type camera to the reactive variable quantity of the SVG or the reactive variable quantity of the new energy unit as a compensation coefficient test value; the description of the embodiments may be referred to above, and will not be repeated.
Repeatedly executing step disturbance and subsequent steps to the new energy unit reactive power instruction or the SVG reactive power instruction to obtain a plurality of compensation coefficient test values equal to the first preset number; the description of the embodiments may be referred to above, and will not be repeated.
And averaging the test values of the compensation coefficients to obtain the set compensation coefficient. The description of the embodiments may be referred to above, and will not be repeated.
Further, the reactive power control method for the distributed camera of the new energy station further comprises presetting a conversion coefficient, and specifically comprises the following steps:
step disturbance is applied to the voltage command of the machine end of the distributed type camera, and the change of the voltage of the machine end of the distributed type camera and the change of reactive power of the distributed type camera are recorded respectively; the description of the embodiments may be referred to above, and will not be repeated.
Determining the ratio of the voltage variation of the machine end of the distributed type camera to the reactive power variation of the distributed type camera as a calculation coefficient test value; the description of the embodiments may be referred to above, and will not be repeated.
Repeatedly executing step disturbance and subsequent steps on the voltage command of the distributed camera terminal to obtain a plurality of calculation coefficient test values equal to a second preset number; the description of the embodiments may be referred to above, and will not be repeated.
And averaging the plurality of calculation coefficient test values to obtain the set calculation coefficient. The description of the embodiments may be referred to above, and will not be repeated.
Fig. 8 is a schematic structural diagram of a reactive power control device for a distributed phase-change regulator for a new energy station according to an embodiment of the present invention, as shown in fig. 8, where the reactive power control device for a distributed phase-change regulator for a new energy station according to an embodiment of the present invention includes an obtaining unit 801, a determining unit 802, and a control unit 803, where:
The acquisition unit 801 is used for acquiring a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and acquiring a new energy unit reactive power initial value and an SVG reactive power initial value; the determining unit 802 is configured to determine reactive power required to be compensated by the distributed type camera according to the new energy unit reactive power instruction, the new energy unit reactive power initial value, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determine a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the distributed type camera reactive power instruction; the control unit 803 is configured to perform per unit processing according to the reactive current value of the distributed camera and the final reactive command, obtain a machine terminal voltage variation according to a per unit processing result and a conversion coefficient, superimpose the machine terminal voltage variation on a machine terminal voltage given value through an increasing/decreasing magnetic signal, and perform reactive control of the distributed camera according to the superimposed machine terminal voltage given value, the machine terminal voltage current value and a distributed camera excitation closed-loop control system.
Specifically, an acquisition unit 801 in the device is used for acquiring a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and acquiring a new energy unit reactive power initial value and an SVG reactive power initial value; the determining unit 802 is configured to determine reactive power required to be compensated by the distributed type camera according to the new energy unit reactive power instruction, the new energy unit reactive power initial value, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determine a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the distributed type camera reactive power instruction; the control unit 803 is configured to perform per unit processing according to the reactive current value of the distributed camera and the final reactive command, obtain a machine terminal voltage variation according to a per unit processing result and a conversion coefficient, superimpose the machine terminal voltage variation on a machine terminal voltage given value through an increasing/decreasing magnetic signal, and perform reactive control of the distributed camera according to the superimposed machine terminal voltage given value, the machine terminal voltage current value and a distributed camera excitation closed-loop control system.
The reactive power control device for the distributed type camera of the new energy station provided by the embodiment of the invention collects a reactive power instruction of a new energy unit, a reactive power instruction of SVG and a reactive power instruction of the distributed type camera which are issued by an AVC substation, and obtains a reactive power initial value of the new energy unit and a reactive power initial value of SVG; determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera; and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system, and improving reactive control precision of the distributed type camera.
Further, the determining unit 802 is specifically configured to:
calculating a difference value between a new energy unit reactive power instruction and a new energy unit reactive power initial value to obtain a new energy unit reactive power variation, and calculating a difference value between an SVG reactive power instruction and an SVG reactive power initial value to obtain an SVG reactive power variation;
and adding the reactive variable quantity of the new energy unit and the SVG reactive variable quantity, and multiplying the added reactive variable quantity by a compensation coefficient to obtain reactive power required to be compensated by the distributed type phase-change regulator.
Further, the determining unit 802 is specifically configured to:
and adding the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera to obtain the final reactive power instruction of the distributed type camera.
Further, the control unit 803 is specifically configured to:
and calculating a difference value between the final reactive power instruction and the reactive power current value of the distributed type dispatching machine, and dividing the difference value result by the capacity of the distributed type dispatching machine to obtain a per unit processing result.
Further, the control unit 803 is specifically configured to:
and multiplying the per unit processing result by the conversion coefficient to obtain the voltage variation of the machine terminal.
Further, the reactive power control device for the distributed camera of the new energy station is further used for presetting compensation coefficients, and is specifically used for:
Step disturbance is applied to the reactive power instruction of the new energy unit or the SVG reactive power instruction, and the reactive power variation of the SVG or the reactive power variation of the new energy unit and the reactive power variation of the distributed phase regulator are recorded respectively;
determining the ratio of the reactive variable quantity of the distributed type camera to the reactive variable quantity of the SVG or the reactive variable quantity of the new energy unit as a compensation coefficient test value;
repeatedly executing step disturbance and subsequent steps to the new energy unit reactive power instruction or the SVG reactive power instruction to obtain a plurality of compensation coefficient test values equal to the first preset number;
and averaging the test values of the compensation coefficients to obtain the set compensation coefficient.
Further, the reactive power control device for the distributed camera of the new energy station is further used for presetting a conversion coefficient, and is particularly used for:
step disturbance is applied to the voltage command of the machine end of the distributed type camera, and the change of the voltage of the machine end of the distributed type camera and the change of reactive power of the distributed type camera are recorded respectively;
determining the ratio of the voltage variation of the machine end of the distributed type camera to the reactive power variation of the distributed type camera as a calculation coefficient test value;
repeatedly executing step disturbance and subsequent steps on the voltage command of the distributed camera terminal to obtain a plurality of calculation coefficient test values equal to a second preset number;
And averaging the plurality of calculation coefficient test values to obtain the set calculation coefficient.
The embodiment of the invention provides a reactive power control device for a distributed camera of a new energy station, which can be specifically used for executing the processing flow of each method embodiment, and the functions of the reactive power control device are not repeated herein, and can be referred to in the detailed description of the method embodiments.
Fig. 9 is a schematic diagram of an entity structure of a computer device according to an embodiment of the present invention, where, as shown in fig. 9, the computer device includes: memory 901, processor 902 and a computer program stored on memory 901 and executable on processor 902, which processor 902 when executing the computer program implements the method of:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
And carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
The present embodiment discloses a computer program product comprising a computer program which, when executed by a processor, implements the method of:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
And carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
The present embodiment provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method of:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
And carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
Compared with the technical scheme in the prior art, the method and the device for the reactive power control of the power grid system are characterized in that a reactive power instruction of the new energy unit, a reactive power instruction of the SVG and a reactive power instruction of the distributed regulator, which are issued by an AVC substation, are acquired, and a reactive power initial value of the new energy unit and a reactive power initial value of the SVG are acquired; determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera; and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system, and improving reactive control precision of the distributed type camera.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present specification, reference to the terms "one embodiment," "one particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The reactive power control method for the distributed camera of the new energy station is characterized by comprising the following steps of:
collecting a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by an AVC substation, and obtaining a new energy unit reactive power initial value and an SVG reactive power initial value;
determining reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive power initial value of the new energy unit, the SVG reactive power instruction, the SVG reactive power initial value and the compensation coefficient, and determining a final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and carrying out per unit processing according to the reactive current value of the distributed type camera and the final reactive instruction, obtaining a machine terminal voltage variation according to the per unit processing result and a conversion coefficient, superposing the machine terminal voltage variation to a machine terminal voltage given value through an increasing/decreasing magnetic signal, and carrying out reactive control of the distributed type camera according to the superposed machine terminal voltage given value, the machine terminal voltage current value and a distributed type camera excitation closed-loop control system.
2. The reactive power control method for adjusting a distributed camera of a new energy station according to claim 1, wherein the determining reactive power required to be compensated by the distributed camera according to the new energy unit reactive power instruction and the new energy unit reactive power initial value, the SVG reactive power instruction and the SVG reactive power initial value, and the compensation coefficient comprises:
calculating a difference value between a new energy unit reactive power instruction and a new energy unit reactive power initial value to obtain a new energy unit reactive power variation, and calculating a difference value between an SVG reactive power instruction and an SVG reactive power initial value to obtain an SVG reactive power variation;
and adding the reactive variable quantity of the new energy unit and the SVG reactive variable quantity, and multiplying the added reactive variable quantity by a compensation coefficient to obtain reactive power required to be compensated by the distributed type phase-change regulator.
3. The method for controlling reactive power of a distributed power conditioner for adjusting a new energy station according to claim 1, wherein the determining a final reactive power instruction of the distributed power conditioner according to the reactive power required to be compensated by the distributed power conditioner and the reactive power instruction of the distributed power conditioner comprises:
and adding the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera to obtain the final reactive power instruction of the distributed type camera.
4. The reactive power control method for adjusting a distributed power regulator of a new energy station according to claim 1, wherein the per unit processing is performed according to the reactive current value of the distributed power regulator and the final reactive power instruction, and the method comprises:
and calculating a difference value between the final reactive power instruction and the reactive power current value of the distributed type dispatching machine, and dividing the difference value result by the capacity of the distributed type dispatching machine to obtain a per unit processing result.
5. The reactive power control method for adjusting a distributed camera of a new energy station according to claim 1, wherein the obtaining the voltage variation of the machine terminal according to the per unit processing result and the conversion coefficient comprises:
and multiplying the per unit processing result by the conversion coefficient to obtain the voltage variation of the machine terminal.
6. The reactive power control method for the distributed phase adjustment device for the new energy station according to claim 1, wherein the reactive power control method for the distributed phase adjustment device for the new energy station further comprises presetting compensation coefficients, and specifically comprises the following steps:
step disturbance is applied to the reactive power instruction of the new energy unit or the SVG reactive power instruction, and the reactive power variation of the SVG or the reactive power variation of the new energy unit and the reactive power variation of the distributed phase regulator are recorded respectively;
Determining the ratio of the reactive variable quantity of the distributed type camera to the reactive variable quantity of the SVG or the reactive variable quantity of the new energy unit as a compensation coefficient test value;
repeatedly executing step disturbance and subsequent steps to the new energy unit reactive power instruction or the SVG reactive power instruction to obtain a plurality of compensation coefficient test values equal to the first preset number;
and averaging the test values of the compensation coefficients to obtain the set compensation coefficient.
7. The reactive power control method for the distributed phase adjustment device for the new energy station according to claim 1, wherein the reactive power control method for the distributed phase adjustment device for the new energy station further comprises presetting a conversion coefficient, and specifically comprises the following steps:
step disturbance is applied to the voltage command of the machine end of the distributed type camera, and the change of the voltage of the machine end of the distributed type camera and the change of reactive power of the distributed type camera are recorded respectively;
determining the ratio of the voltage variation of the machine end of the distributed type camera to the reactive power variation of the distributed type camera as a calculation coefficient test value;
repeatedly executing step disturbance and subsequent steps on the voltage command of the distributed camera terminal to obtain a plurality of calculation coefficient test values equal to a second preset number;
And averaging the plurality of calculation coefficient test values to obtain the set calculation coefficient.
8. The utility model provides a adjust new energy station distributing type camera reactive power control device which characterized in that includes:
the acquisition unit is used for acquiring a new energy unit reactive power instruction, an SVG reactive power instruction and a distributed phase regulator reactive power instruction issued by the AVC substation, and acquiring a new energy unit reactive power initial value and an SVG reactive power initial value;
the determining unit is used for determining the reactive power required to be compensated by the distributed type camera according to the reactive power instruction of the new energy unit, the reactive initial value of the new energy unit, the SVG reactive instruction, the SVG reactive initial value and the compensation coefficient, and determining the final reactive power instruction of the distributed type camera according to the reactive power required to be compensated by the distributed type camera and the reactive power instruction of the distributed type camera;
and the control unit is used for carrying out per unit processing according to the reactive current value of the distributed camera and the final reactive instruction, obtaining the voltage variation of the machine end according to the per unit processing result and the conversion coefficient, superposing the voltage variation of the machine end to the given value of the machine end voltage through the magnetism increasing/decreasing signal, and carrying out reactive control of the distributed camera according to the superposed given value of the machine end voltage, the current value of the machine end voltage and the excitation closed-loop control system of the distributed camera.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 7 when executing the computer program.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 7.
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CN113765159A (en) * 2021-07-27 2021-12-07 中国电力科学研究院有限公司 Method and system for improving voltage control capability of new energy station based on coordination control
CN114744689A (en) * 2022-06-13 2022-07-12 国网经济技术研究院有限公司 Reactive power coordination control method and system for new energy station comprising distributed phase modulators
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CN113765159A (en) * 2021-07-27 2021-12-07 中国电力科学研究院有限公司 Method and system for improving voltage control capability of new energy station based on coordination control
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Publication number Priority date Publication date Assignee Title
CN116632860A (en) * 2023-07-24 2023-08-22 国能日新科技股份有限公司 Reactive replacement method, reactive replacement device, reactive replacement equipment and reactive replacement medium for new energy station
CN116632860B (en) * 2023-07-24 2023-10-10 国能日新科技股份有限公司 Reactive replacement method, reactive replacement device, reactive replacement equipment and reactive replacement medium for new energy station

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