CN116191537A - Distributed light Fu Qun group control system and method - Google Patents

Distributed light Fu Qun group control system and method Download PDF

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Publication number
CN116191537A
CN116191537A CN202310070004.6A CN202310070004A CN116191537A CN 116191537 A CN116191537 A CN 116191537A CN 202310070004 A CN202310070004 A CN 202310070004A CN 116191537 A CN116191537 A CN 116191537A
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China
Prior art keywords
photovoltaic
distributed
module
control
dms
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CN202310070004.6A
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Chinese (zh)
Inventor
邢跃春
王建军
李慧
李翰林
芮国华
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Tuotuobao Nanjing Electric Power Technology Co ltd
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Tuotuobao Nanjing Electric Power Technology Co ltd
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Priority to CN202310070004.6A priority Critical patent/CN116191537A/en
Publication of CN116191537A publication Critical patent/CN116191537A/en
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Classifications

    • 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
    • H02J3/381—Dispersed 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
    • 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
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • 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
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention discloses a distributed light Fu Qun group control system, which comprises: the system comprises a distributed photovoltaic DMS master station monitoring module, a DMS master station instruction issuing module, a DMS master station 10kV on-column switch and breaking switch information acquisition module and a DMS distributed photovoltaic calculation control and operation module; the distributed photovoltaic DMS master station monitoring module is used for summarizing and displaying distributed photovoltaic information and detecting and judging whether a line needs to be set or not. According to the distributed light Fu Qun group control system and the method, the distributed DMS group control system is built, so that the distributed photovoltaic power station can effectively support a power grid under the condition of multi-element full-perception acquisition of line information, the reactive power distribution of a 10kV distributed line can be obviously optimized, the power transmission efficiency of the power grid is improved, and the impact of power transmission loss and photovoltaic output on the power grid is reduced.

Description

Distributed light Fu Qun group control system and method
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a distributed light Fu Qun group control system and method.
Background
Because distributed photovoltaic power generation has obvious volatility and randomness, the three-phase unbalance degree of a power distribution network is aggravated by the high-proportion distributed photovoltaic power generation, and the problem of out-of-limit voltage frequent fluctuation is caused. Thus requiring zoning of the distributed photovoltaic.
In the prior art, when dividing distributed photovoltaic clusters, only electrical quantity parameters are considered, so that the problem of low cluster division accuracy is caused.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a distributed light Fu Qun group control system and a method.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a distributed optical Fu Qun group control system comprising:
the system comprises a distributed photovoltaic DMS master station monitoring module, a DMS master station instruction issuing module, a DMS master station 10kV on-column switch and breaking switch information acquisition module and a DMS distributed photovoltaic calculation control and operation module;
the distributed photovoltaic DMS master station monitoring module is used for summarizing and displaying distributed photovoltaic information and detecting and judging whether a line needs to be set or not;
the DMS master station command issuing component uses an electric remote control 104 protocol to expand an interactive protocol, issues a control fixed value and a control command, and collects control information of the distributed photovoltaic substation;
the DMS master station 10kV pole switch and breaking switch information acquisition component is used for collecting information of a pole switch, a ring network switch, a breaking switch and a main transformer 10kV switch associated with a line where a distributed photovoltaic station is located;
the DMS distributed photovoltaic calculation control and operation component calculates the control quantity required by each power station according to the collected distributed power station information and the information of the line where the photovoltaic power station is located, and sends the control quantity to the photovoltaic substation through the DMS main station instruction sending component;
the distributed photovoltaic DMS master station monitoring display comprises: distributed management, data statistics, map information display, voltage curves, active and reactive histograms.
Preferably, the method further comprises:
the distributed photovoltaic cluster comprises a plurality of photovoltaic stations and is characterized by comprising a photovoltaic station monitoring and controlling subsystem, a remote monitoring center and a management and control subsystem;
the remote monitoring center monitors and analyzes the real-time operation data of the photovoltaic station and sends the monitoring data and analysis results to the management control subsystem;
the management control subsystem formulates a control strategy according to the received monitoring data and analysis results and sends a control instruction to the photovoltaic site detection control subsystem;
the photovoltaic site monitoring and controlling subsystem receives a power adjustment instruction and controls and adjusts the photovoltaic site;
the photovoltaic site monitoring control subsystem comprises a grid-connected control module and a detection module;
the grid-connected control module comprises a main controller and a power supply module, wherein the power supply module comprises a solar photovoltaic array for converting solar energy into electric energy;
the solar photovoltaic array is connected with the direct current cabinet; the direct-current cabinet is connected with the grid-connected switch through an inverter for converting direct current into alternating current;
the grid-connected switch is connected with a power grid to be tested through a metering power meter; the direct current cabinet is connected with the main controller; the detection module comprises a current detection module connected with the inverter and a voltage detection module connected with the grid-connected switch;
the current detection module and the voltage detection module are respectively connected with the main controller; the main controller is connected with the remote monitoring center and is used for sending real-time operation data of the photovoltaic station to the remote monitoring center;
the main controller is in communication connection with the management control subsystem and is used for receiving the power adjustment instruction output by the management control subsystem and controlling and adjusting the photovoltaic station.
Preferably, each photovoltaic station is provided with a solar photovoltaic array; the solar photovoltaic array of each photovoltaic station is connected with a driving circuit, and each driving circuit is connected with the direct current cabinet; the driving circuit is connected with the main controller and is used for outputting a power adjustment instruction of the management control subsystem to the driving circuit through the main controller so as to realize control adjustment of the photovoltaic station.
Preferably, a direct current booster circuit is arranged in the direct current cabinet, and the direct current booster circuit is connected with the inverter.
Preferably, the grid-connected control module further comprises a protection module for protecting the power supply stability of the power grid; the metering power meter is connected to a power grid through a protection module; the protection module is connected with the main controller.
Preferably, the photovoltaic site monitoring and controlling subsystem further comprises a data acquisition module and a data storage module, wherein the data acquisition module is used for acquiring data of equipment in the system and sending the acquired data to the data storage module; and the data storage module is used for storing the received collected data according to different data types and transmitting the collected data to a remote monitoring center.
Preferably, the method further comprises:
the grid-connected point monitoring module is used for detecting grid-connected points according to preset sampling frequency to obtain a current curve; judging whether an opening and closing action occurs according to a current threshold value and the current curve; if the opening and closing actions occur, obtaining a maximum value point of current according to the current curve, and obtaining current extremum characteristics of opening and/or closing intervals; detecting grid-connected points according to a preset sampling frequency to obtain a voltage curve; judging whether an opening and closing action occurs according to a voltage threshold value and the voltage curve; if the opening and closing actions occur, obtaining a voltage maximum point according to the voltage curve, and obtaining the voltage extremum characteristic of the opening and/or closing interval; acquiring a reference position and a relative position of a breaker in each grid-connected point, and obtaining a predicted value of the sum of source network load distances according to the reference position and the relative position; the calculation module is used for partitioning the distributed photovoltaic cluster to obtain a partitioning result of the initial distributed photovoltaic cluster; predicting capacity adjustment capacity of the distributed photovoltaic cluster according to current extremum characteristics of a switching-off and/or switching-on interval of each grid-connected point, voltage extremum characteristics of the switching-off and/or switching-on interval and operation data of the distributed photovoltaic cluster in a partitioning result of the initial distributed photovoltaic cluster; optimizing the partition of the distributed photovoltaic clusters by taking the predicted value of the sum of the load distances of each source network in the distributed photovoltaic clusters as the minimum, and taking the capacity adjustment capability of each cluster as the maximum optimization target, so as to obtain the partition result of the distributed photovoltaic clusters; the control module is used for carrying out hierarchical cluster division on each distributed photovoltaic according to the partition result of the distributed photovoltaic clusters to form a distributed photovoltaic platform area-photovoltaic cluster-area autonomous power distribution network, and voltage coordination control is realized with the photovoltaic clusters and the distributed photovoltaic platform area according to an operation control strategy formed by each area based on the control target of the area autonomous power distribution network.
A distributed light Fu Qun group control method comprises the following steps:
step S1: the information acquisition component of the on-pole switch and the breaking switch of the 10kV of the main station of the DMS is used for acquiring the information of the active, reactive, voltage and current of each on-pole switch, the breaking switch, the ring network switch and the main transformer 10kV switch connected with the line on the 10kV line where the photovoltaic power station is located;
step S2: the collected data are sent to a distributed photovoltaic DMS master station monitoring module, the distributed photovoltaic DMS master station monitoring module detects whether the active, reactive and voltage of a line are abnormal or exceed target function target values, and the line parameters which are judged to be set are sent to a DMS distributed photovoltaic calculation and control module;
step S3: the DMS distributed photovoltaic calculation and control module calculates a value to be set of a line, and sends the value to the DMS master station instruction issuing component;
step S4: the DMS master station transmits the active power and the non-active power which are required to be adjusted by the distributed photovoltaic power station to the power station group control server through the electric power telecontrol 104 expansion protocol, and receives the control condition and the control result fed back by the distributed photovoltaic power station group control server;
step S5: and the distributed photovoltaic DMS master station monitoring module displays the control condition of the substation on a monitoring interface.
(III) beneficial effects
Compared with the prior art, the invention provides a distributed light Fu Qun group control system and method, which have the following beneficial effects:
1. according to the distributed light Fu Qun group control system and the method, the distributed DMS group control system is built, so that the distributed photovoltaic power station can effectively support a power grid under the condition of multi-element full-perception acquisition of line information, the reactive power distribution of a 10kV distributed line can be obviously optimized, the power transmission efficiency of the power grid is improved, and the impact of power transmission loss and photovoltaic output on the power grid is reduced.
2. According to the distributed light Fu Qun group control system and method, the voltage, the current, the power generation electric quantity, the network power consumption electric quantity and the network power consumption electric quantity of the distributed photovoltaic sites are monitored, and the monitoring result is counted, so that future power generation prediction and real-time power generation prediction can be further carried out.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only 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.
A distributed optical Fu Qun group control system comprising:
the system comprises a distributed photovoltaic DMS master station monitoring module, a DMS master station instruction issuing module, a DMS master station 10kV on-column switch and breaking switch information acquisition module and a DMS distributed photovoltaic calculation control and operation module;
the distributed photovoltaic DMS master station monitoring module is used for summarizing and displaying distributed photovoltaic information and detecting and judging whether a line needs to be set or not;
the DMS master station command issuing component uses an electric power telecontrol 104 protocol to expand an interactive protocol, issues a control fixed value and a control command, and collects control information of the distributed photovoltaic substation;
the information acquisition component of the on-pole switch and the breaking switch of the 10kV master station is used for collecting information of the on-pole switch, the ring network switch, the breaking switch and the main transformer 10kV switch associated with a line where a distributed photovoltaic station is located;
the DMS distributed photovoltaic calculation control and operation assembly calculates the control quantity required by each power station according to the collected distributed power station information and the information of the line where the photovoltaic power station is located, and sends the control quantity to the photovoltaic substation through the DMS main station instruction issuing assembly;
the monitoring display of the distributed photovoltaic DMS master station comprises: distributed management, data statistics, map information display, voltage curves, active and reactive histograms.
Further, in an embodiment of the present invention, the method further includes:
the distributed photovoltaic cluster comprises a plurality of photovoltaic stations and is characterized by comprising a photovoltaic station monitoring and controlling subsystem, a remote monitoring center and a management and control subsystem;
the remote monitoring center monitors and analyzes the real-time operation data of the photovoltaic station and sends the monitoring data and analysis results to the management control subsystem;
the management control subsystem formulates a control strategy according to the received monitoring data and analysis results and sends a control instruction to the photovoltaic site detection control subsystem;
the photovoltaic site monitoring and controlling subsystem receives a power adjustment instruction and controls and adjusts the photovoltaic site;
the photovoltaic site monitoring control subsystem comprises a grid-connected control module and a detection module;
the grid-connected control module comprises a main controller and a power supply module, and the power supply module comprises a solar photovoltaic array for converting solar energy into electric energy;
the solar photovoltaic array of the solar energy storage battery is connected with the direct current cabinet; the direct-current cabinet of (2) is connected with a grid-connected switch through an inverter which converts direct current into alternating current;
the grid-connected switch of the power grid is connected with a power grid to be tested through a metering power meter; the direct current cabinet is connected with the main controller; the detection module comprises a current detection module connected with the inverter and a voltage detection module connected with the grid-connected switch;
the current detection module and the voltage detection module of the device are respectively connected with the main controller; the main controller of the system is connected with the remote monitoring center and is used for sending real-time operation data of the photovoltaic station to the remote monitoring center;
the main controller is in communication connection with the management control subsystem and is used for receiving the power adjustment instruction output by the management control subsystem and controlling and adjusting the photovoltaic station.
Further, in the embodiment of the invention, each photovoltaic station is provided with a solar photovoltaic array; the solar photovoltaic array of each photovoltaic station is connected with a driving circuit, and each driving circuit is connected with the direct current cabinet; the driving circuit of the photovoltaic station is connected with the main controller and is used for outputting a power adjustment instruction of the management control subsystem to the driving circuit through the main controller so as to realize control adjustment of the photovoltaic station.
Further, in the embodiment of the invention, a direct current booster circuit is arranged in the direct current cabinet, and the direct current booster circuit is connected with the inverter.
Further, in the embodiment of the invention, the grid-connected control module further comprises a protection module for protecting the power supply stability of the power grid; is connected to the power grid through a protection module; the protection module of the system is connected with the main controller.
Preferably, the photovoltaic site monitoring and controlling subsystem further comprises a data acquisition module and a data storage module, wherein the data acquisition module is used for acquiring data of equipment in the system and sending the acquired data to the data storage module; and the data storage module is used for storing the received collected data according to different data types and transmitting the collected data to a remote monitoring center.
Further, in an embodiment of the present invention, the method further includes:
the grid-connected point monitoring module is used for detecting grid-connected points according to preset sampling frequency to obtain a current curve; judging whether an opening and closing action occurs according to the current threshold value and the current curve; if the opening and closing actions occur, obtaining a maximum value point of current according to a current curve, and obtaining current extremum characteristics of opening and/or closing intervals; detecting grid-connected points according to a preset sampling frequency to obtain a voltage curve; judging whether an opening and closing action occurs according to the voltage threshold and the voltage curve; if the opening and closing actions occur, a voltage maximum point is obtained according to a voltage curve, and the voltage extremum characteristic of the opening and/or closing interval is obtained; acquiring a reference position and a relative position of a breaker in each grid-connected point, and acquiring a predicted value of the sum of source network load distances according to the reference position and the relative position; the computing module is used for partitioning the distributed photovoltaic clusters to obtain the partitioning result of the initial distributed photovoltaic clusters; predicting capacity adjustment capacity of the distributed photovoltaic cluster according to current extremum characteristics of a switching-off and/or switching-on interval of each grid-connected point, voltage extremum characteristics of the switching-off and/or switching-on interval and operation data of the distributed photovoltaic cluster in a partitioning result of the initial distributed photovoltaic cluster; optimizing the partition of the distributed photovoltaic clusters by taking the predicted value of the sum of the load distances of each source network in the distributed photovoltaic clusters as the minimum, and taking the capacity adjustment capability of each cluster as the maximum optimization target, so as to obtain the partition result of the distributed photovoltaic clusters; the control module is used for carrying out hierarchical cluster division on each distributed photovoltaic according to the partition result of the distributed photovoltaic clusters to form a distributed photovoltaic platform area-photovoltaic cluster-area autonomous power distribution network, and voltage coordination control is realized with the photovoltaic clusters and the distributed photovoltaic platform areas according to an operation control strategy formed by each area based on the control target of the area autonomous power distribution network.
Specifically, the grid-connected point monitoring module is further configured to determine whether the predicted value of the capacity adjustment capability of the distributed photovoltaic cluster is greater than the actual operation value of the capacity adjustment capability if the predicted value of the sum of the source network load distances in the distributed photovoltaic cluster is less than the actual operation value of the source network load distances; and if the predicted value of the capacity adjustment capability of the distributed photovoltaic cluster is larger than the actual running value of the capacity adjustment capability, taking the partitioning result of the initial distributed photovoltaic cluster as the partitioning result of the distributed photovoltaic cluster.
And the grid-connected point monitoring module is further used for stopping calculation if the predicted value of the sum of the source network load distances in the distributed photovoltaic cluster is larger than the actual running value of the source network load distances, and continuing to partition the distributed photovoltaic cluster according to the current extremum characteristic of the new grid-connected point and/or the new switching-on and/or switching-off interval, the predicted value of the sum of the voltage extremum characteristic of the grid-connected and/or switching-off interval and the source network load distances and the running data of the distributed photovoltaic cluster when the current extremum characteristic of the new grid-connected and/or switching-off interval, the predicted value of the sum of the grid-connected and/or switching-off interval and the predicted value of the source network load distances are monitored.
A distributed light Fu Qun group control method comprises the following steps:
step S1: the information acquisition component of the on-pole switch and the breaking switch of the 10kV of the main station of the DMS is used for acquiring the information of the active, reactive, voltage and current of each on-pole switch, the breaking switch, the ring network switch and the main transformer 10kV switch connected with the line on the 10kV line where the photovoltaic power station is located;
step S2: the collected data are sent to a distributed photovoltaic DMS master station monitoring module, the distributed photovoltaic DMS master station monitoring module detects whether the active, reactive and voltage of a line is abnormal or exceeds a target value of an objective function, and the line parameters which are judged to be set are sent to a DMS distributed photovoltaic calculation and control module;
step S3: the DMS distributed photovoltaic calculation and control module calculates a value required to be set by a line and sends the value to the DMS master station command issuing component;
step S4: the DMS master station transmits the active power and the non-active power which are required to be adjusted by the distributed photovoltaic power station to the power station group control server through the electric power telecontrol 104 expansion protocol, and receives the control condition and the control result fed back by the distributed photovoltaic power station group control server;
step S5: the distributed photovoltaic DMS master station monitoring module displays the control condition of the substation on a monitoring interface.
Further, in the embodiment of the invention, in the step S2-step S3, if the line inductive reactive power is detected to be greater than the limit Q inductive limit through the on-column switch, the ring network switch, the breaking switch or the main transformer 10kV switch, the Q inductive reactive power of the breaking switch in real time is collected, the control reactive power= |q breaking inductive reactive power| of a fixed value Q light Fu Rong is set, and the Q inductive reactive power is issued to the photovoltaic substation.
Further, in the embodiment of the invention, in the step S2-step S3, the line capacitive reactive power is detected to be greater than the limit Q capacitive limit through the on-column switch, the ring network switch, the breaking switch or the main transformer 10kV switch, but the line voltage does not exceed the voltage upper limit value, and then the photovoltaic substation inductive reactive power compensation is not performed; if the line inductive reactive power is larger than the limit Q capacity limit, collecting and counting the real-time Q capacity reactive power of the breaking switch, setting a constant value Q photovoltaic inductive control reactive power= |Q breaking capacity reactive power|, and issuing to a photovoltaic substation.
Further, in the embodiment of the present invention, in step S2-step S3, when there is a voltage sensitive user on the line, an upper voltage fluctuation limit and a lower voltage fluctuation limit are set by the master station, and are issued to the substation, and the substation performs voltage fluctuation range control.
Further, in the embodiment of the present invention, in step S2-step S3, when the line is overhauled, the line needs to be temporarily switched to another line, and the master station monitors in real time whether each monitoring point on the line exceeds the line carrying capacity, if so, the P control=p send-P limit is issued to the photovoltaic station, so as to prevent the line from being overloaded.
Further, in the embodiment of the present invention, in step S2-step S3, when the primary station needs to issue power limit control, the primary station performs power control according to the actual line situation.
Further, in the embodiment of the present invention, in step S2-step S3, when abnormal rising of the line frequency of the photovoltaic is detected and multi-point confirmation is performed, the distributed photovoltaic is limited by the automatic control system, and the limitation is released after the line frequency of the station is stable.
Further, in the embodiment of the invention, an objective function fixed value control model is adopted, and the real-time state of the line where the photovoltaic is located is taken as input to obtain the control parameters required by the photovoltaic power station where the line is located; based on a closed loop feedback automation algorithm, the active output, reactive power distribution and voltage adjustment range in the circuit are controlled in real time.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A distributed optical Fu Qun group control system, comprising:
the system comprises a distributed photovoltaic DMS master station monitoring module, a DMS master station instruction issuing module, a DMS master station 10kV on-column switch and breaking switch information acquisition module and a DMS distributed photovoltaic calculation control and operation module;
the distributed photovoltaic DMS master station monitoring module is used for summarizing and displaying distributed photovoltaic information and detecting and judging whether a line needs to be set or not;
the DMS master station command issuing component uses an electric remote control 104 protocol to expand an interactive protocol, issues a control fixed value and a control command, and collects control information of the distributed photovoltaic substation;
the DMS master station 10kV pole switch and breaking switch information acquisition component is used for collecting information of a pole switch, a ring network switch, a breaking switch and a main transformer 10kV switch associated with a line where a distributed photovoltaic station is located;
the DMS distributed photovoltaic calculation control and operation component calculates the control quantity required by each power station according to the collected distributed power station information and the information of the line where the photovoltaic power station is located, and sends the control quantity to the photovoltaic substation through the DMS main station instruction sending component;
the distributed photovoltaic DMS master station monitoring display comprises: distributed management, data statistics, map information display, voltage curves, active and reactive histograms.
2. The distributed optical Fu Qun group control system of claim 1, further comprising:
the distributed photovoltaic cluster comprises a plurality of photovoltaic stations and is characterized by comprising a photovoltaic station monitoring and controlling subsystem, a remote monitoring center and a management and control subsystem;
the remote monitoring center monitors and analyzes the real-time operation data of the photovoltaic station and sends the monitoring data and analysis results to the management control subsystem;
the management control subsystem formulates a control strategy according to the received monitoring data and analysis results and sends a control instruction to the photovoltaic site detection control subsystem;
the photovoltaic site monitoring and controlling subsystem receives a power adjustment instruction and controls and adjusts the photovoltaic site;
the photovoltaic site monitoring control subsystem comprises a grid-connected control module and a detection module;
the grid-connected control module comprises a main controller and a power supply module, wherein the power supply module comprises a solar photovoltaic array for converting solar energy into electric energy;
the solar photovoltaic array is connected with the direct current cabinet; the direct-current cabinet is connected with the grid-connected switch through an inverter for converting direct current into alternating current;
the grid-connected switch is connected with a power grid to be tested through a metering power meter; the direct current cabinet is connected with the main controller; the detection module comprises a current detection module connected with the inverter and a voltage detection module connected with the grid-connected switch;
the current detection module and the voltage detection module are respectively connected with the main controller; the main controller is connected with the remote monitoring center and is used for sending real-time operation data of the photovoltaic station to the remote monitoring center;
the main controller is in communication connection with the management control subsystem and is used for receiving the power adjustment instruction output by the management control subsystem and controlling and adjusting the photovoltaic station.
3. A distributed optical Fu Qun group control system according to claim 2, wherein each photovoltaic site is provided with a solar photovoltaic array; the solar photovoltaic array of each photovoltaic station is connected with a driving circuit, and each driving circuit is connected with the direct current cabinet; the driving circuit is connected with the main controller and is used for outputting a power adjustment instruction of the management control subsystem to the driving circuit through the main controller so as to realize control adjustment of the photovoltaic station.
4. The distributed optical Fu Qun group control system according to claim 3, wherein a dc boost circuit is disposed in the dc cabinet, and the dc boost circuit is connected to the inverter.
5. The distributed optical Fu Qun group control system according to claim 4, wherein said grid-tie control module further comprises a protection module for protecting the power grid from power stabilization; the metering power meter is connected to a power grid through a protection module; the protection module is connected with the main controller.
6. The distributed optical Fu Qun group control system according to claim 5, wherein the photovoltaic site monitoring control subsystem further comprises a data acquisition module and a data storage module, wherein the data acquisition module is used for acquiring data of devices in the system and transmitting the acquired data to the data storage module; and the data storage module is used for storing the received collected data according to different data types and transmitting the collected data to a remote monitoring center.
7. The distributed optical Fu Qun group control system of claim 1, further comprising:
the grid-connected point monitoring module is used for detecting grid-connected points according to preset sampling frequency to obtain a current curve; judging whether an opening and closing action occurs according to a current threshold value and the current curve; if the opening and closing actions occur, obtaining a maximum value point of current according to the current curve, and obtaining current extremum characteristics of opening and/or closing intervals; detecting grid-connected points according to a preset sampling frequency to obtain a voltage curve; judging whether an opening and closing action occurs according to a voltage threshold value and the voltage curve; if the opening and closing actions occur, obtaining a voltage maximum point according to the voltage curve, and obtaining the voltage extremum characteristic of the opening and/or closing interval; acquiring a reference position and a relative position of a breaker in each grid-connected point, and obtaining a predicted value of the sum of source network load distances according to the reference position and the relative position; the calculation module is used for partitioning the distributed photovoltaic cluster to obtain a partitioning result of the initial distributed photovoltaic cluster; predicting capacity adjustment capacity of the distributed photovoltaic cluster according to current extremum characteristics of a switching-off and/or switching-on interval of each grid-connected point, voltage extremum characteristics of the switching-off and/or switching-on interval and operation data of the distributed photovoltaic cluster in a partitioning result of the initial distributed photovoltaic cluster; optimizing the partition of the distributed photovoltaic clusters by taking the predicted value of the sum of the load distances of each source network in the distributed photovoltaic clusters as the minimum, and taking the capacity adjustment capability of each cluster as the maximum optimization target, so as to obtain the partition result of the distributed photovoltaic clusters; the control module is used for carrying out hierarchical cluster division on each distributed photovoltaic according to the partition result of the distributed photovoltaic clusters to form a distributed photovoltaic platform area-photovoltaic cluster-area autonomous power distribution network, and voltage coordination control is realized with the photovoltaic clusters and the distributed photovoltaic platform area according to an operation control strategy formed by each area based on the control target of the area autonomous power distribution network.
8. A distributed optical Fu Qun group control method according to any one of claims 1 to 7, comprising the steps of:
step S1: the information acquisition component of the on-pole switch and the breaking switch of the 10kV of the main station of the DMS is used for acquiring the information of the active, reactive, voltage and current of each on-pole switch, the breaking switch, the ring network switch and the main transformer 10kV switch connected with the line on the 10kV line where the photovoltaic power station is located;
step S2: the collected data are sent to a distributed photovoltaic DMS master station monitoring module, the distributed photovoltaic DMS master station monitoring module detects whether the active, reactive and voltage of a line are abnormal or exceed target function target values, and the line parameters which are judged to be set are sent to a DMS distributed photovoltaic calculation and control module;
step S3: the DMS distributed photovoltaic calculation and control module calculates a value to be set of a line, and sends the value to the DMS master station instruction issuing component;
step S4: the DMS master station transmits the active power and the non-active power which are required to be adjusted by the distributed photovoltaic power station to the power station group control server through the electric power telecontrol 104 expansion protocol, and receives the control condition and the control result fed back by the distributed photovoltaic power station group control server;
step S5: and the distributed photovoltaic DMS master station monitoring module displays the control condition of the substation on a monitoring interface.
CN202310070004.6A 2023-02-07 2023-02-07 Distributed light Fu Qun group control system and method Pending CN116191537A (en)

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CN202310070004.6A CN116191537A (en) 2023-02-07 2023-02-07 Distributed light Fu Qun group control system and method

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Application Number Priority Date Filing Date Title
CN202310070004.6A CN116191537A (en) 2023-02-07 2023-02-07 Distributed light Fu Qun group control system and method

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CN116191537A true CN116191537A (en) 2023-05-30

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