CN113675876A - Automatic black start control method for microgrid - Google Patents
Automatic black start control method for microgrid Download PDFInfo
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- CN113675876A CN113675876A CN202010405165.2A CN202010405165A CN113675876A CN 113675876 A CN113675876 A CN 113675876A CN 202010405165 A CN202010405165 A CN 202010405165A CN 113675876 A CN113675876 A CN 113675876A
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- 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
- H02J13/00016—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 using a wired telecommunication network or a data transmission bus
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Control Of Eletrric Generators (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an automatic black start control method for a microgrid, wherein a black start power supply in the microgrid is an energy storage and diesel generator, and a microgrid coordination controller acquires the voltage frequency of the microgrid side and the power grid side and the switch position of a grid-connected point, and communicates with an energy storage local coordination controller and a diesel generator local coordination controller; the microgrid is in a grid-connected normal operation state, when power is lost unexpectedly on the power grid side, the grid-connected point switch and all load incoming line switches are tripped, the energy storage is quickly and automatically started in a black mode to establish the voltage frequency of the microgrid bus and recover the power supply of important loads, the power failure time of the important loads is shortened, then the diesel generator is started to recover the power supply of other loads, the power supply reliability of the microgrid system is improved, and the microgrid system is suitable for practical engineering application.
Description
Technical Field
The invention relates to the field of microgrid control, in particular to an automatic black start control method for a microgrid.
Background
When the microgrid is normally connected to the power grid, the energy storage converter mostly operates in a power control mode for system peak clipping and valley filling, the diesel generator is generally in a stop state, if the power grid is unexpectedly powered off, the microgrid alternating-current bus suddenly loses the frequency-voltage support of the power grid, the converter acts on voltage or current protection and stops, so that the load loses power supply, at the moment, if an operator participates in the system to be started, the operation is required step by step according to operation rules, the power supply recovery time is long, the system is prone to being mistaken, the system loses power again, and the important load is seriously influenced to recover the power supply.
Disclosure of Invention
The invention aims to provide an automatic black start control method for a microgrid, which is suitable for a microgrid control system and can quickly and automatically black start energy storage in the microgrid and restore load power supply of a diesel generator when the microgrid system is powered off accidentally.
In order to achieve the above purpose, the solution of the invention is: a microgrid automatic black start control method is characterized in that a black start power supply in a microgrid comprises an energy storage unit and a diesel generator, and the control method comprises the following steps:
the micro-grid coordination controller acquires the voltage frequencies of the micro-grid side and the power grid side and the positions of the switches of the grid-connected points, and communicates with the energy storage local coordination controller and the diesel generator local coordination controller;
the microgrid is in a grid-connected normal operation state, and when the power grid side loses power accidentally and the action condition of the automatic black start control function is met, the grid-connected point switch and all load incoming line switches are tripped;
the method comprises the steps of quickly and automatically starting energy storage in a black mode to establish the voltage frequency of a microgrid bus, and recovering important load power supply according to energy storage capacity;
and starting the diesel generator to recover the power supply of other loads.
In the preferred scheme, the microgrid coordination controller is communicated with the energy storage local coordination controller through a GOOSE, receives energy storage state information and sends a control command;
the microgrid coordination controller is communicated with the diesel generator local coordination controller through the GOOSE, receives the state information of the diesel generator and sends a control instruction;
the energy storage local coordination controller is communicated with a plurality of energy storage converters PCS through GOOSE, receives and summarizes state information of each PCS, decomposes and sends a control instruction to each PCS;
the on-site coordination controller of the diesel generator is communicated with the plurality of diesel generator controllers through the Modbus, receives and summarizes the state information of each diesel generator, and decomposes and sends a control instruction to each diesel generator.
In a preferred scheme, the meeting of the action condition of the automatic black start control function specifically comprises: and activating an automatic black start control function and losing voltage of the bus in the microgrid.
In a preferred embodiment, the meeting of the operation condition of the auto black start control function further includes: and waiting for the completion of the line reclosing and the spare power automatic switching.
In a preferred embodiment, the activation of the auto black start control function simultaneously satisfies the following conditions: and an automatic black start control function is put into operation, the system is in a grid-connected state, the voltage frequency of a bus in the microgrid is normal, the microgrid coordination controller is normally communicated with the energy storage local coordination controller or the diesel generator local coordination controller, and the automatic black start control function condition is not locked.
In a preferred embodiment, the locking automatic black start control function conditions include: the automatic black start control function is quitted, the bus in the microgrid fails, the grid-connected point switch fails to trip, the grid-connected point switch is manually separated, the automatic black start control action is finished, and the communication between the microgrid coordinated controller and the energy storage local coordinated controller as well as the communication between the microgrid coordinated controller and the diesel generator local coordinated controller are interrupted; and if any condition exists, the automatic black start control function is immediately locked.
In an optimal scheme, the fast automatic black-start energy storage is used for establishing the voltage frequency of the microgrid bus, and the recovery of the important load power supply according to the energy storage capacity specifically comprises the following steps:
step 11: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the step 12 is entered;
step 12: starting energy storage and recovering the bus voltage frequency, and entering step 13;
step 13: and after the energy storage is started successfully and the voltage frequency of the bus is recovered, recovering the loads one by one according to the priority level according to the energy storage capacity.
In a preferred scheme, the starting the diesel generator and recovering the power supply of other loads specifically comprises:
step 21: sending a grid-connected mode command and a starting command to the diesel generator local coordination controller, and entering step 22;
step 22: after the diesel generator is started successfully, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering step 23;
step 23: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
In a preferred embodiment, if the energy storage start fails or the bus voltage frequency recovery fails in step 12, the method proceeds to
Step 14: sending an off-grid mode command and a black start command to a diesel generator coordinated controller; entering step 15;
step 15: judging whether the diesel generator is started successfully and the bus voltage frequency is recovered, if so, entering step 16, otherwise, finishing the automatic black start control action;
step 16: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
In a preferred scheme, after the action condition of the automatic black start control function is met, the following control flow is executed:
step 31: the microgrid coordinated controller trips a grid-connected point switch and all load incoming line switches, and the step 32 is carried out;
step 32: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the step 33 is entered;
step 33: if the energy storage starting is successful and the bus voltage frequency is recovered, recovering the load one by one according to the priority level according to the energy storage capacity, sending a grid-connected mode command and a starting command to the diesel generator local coordination controller, and entering step 34, or entering step 35;
step 34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering step 36, otherwise, ending the automatic black start control action;
step 35: sending an off-grid mode command and a black start command to a diesel generator coordination controller, if the diesel generator is successfully started and the bus voltage frequency is recovered, entering a step 36, and if the diesel generator is not successfully started and the bus voltage frequency is recovered, ending the automatic black start control action;
step 36: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
The invention has the beneficial effects that:
the invention provides an automatic black start control method for a microgrid, wherein a microgrid coordinated controller acquires the voltage frequency of a microgrid side and a power grid side and the switch position of a grid-connected point, and communicates with an energy storage local coordinated controller and a diesel generator local coordinated controller, so that the change of the running state of a system can be accurately and quickly recognized, when the system is powered off accidentally and the automatic black start action condition is met, load shedding is automatically carried out, the automatic black start energy storage and the diesel generator quickly recover load power supply, the important load power failure time is greatly shortened, and the reliability of the microgrid power supply is improved.
Drawings
Fig. 1 is a system structure diagram of an automatic black start control method for a microgrid.
Fig. 2 is a flowchart of an embodiment of a piconet automatic black start control method.
Fig. 3 is a logic diagram of the microgrid automatic black start control method for function activation.
Fig. 4 is a flow chart of energy storage start-up recovery load.
Fig. 5 is a flow chart of a power storage startup failure process.
Fig. 6 is a flow chart of a diesel generator start-up recovery load.
Fig. 7 is an action flow chart of a microgrid automatic black start control method.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
Fig. 1 shows a system structure diagram of an automatic black start control method for a microgrid according to the present invention, wherein a black start power supply in the microgrid is an energy storage and diesel generator, and a microgrid coordination controller collects voltage frequencies of a microgrid side and a power grid side and a grid-connected point switch position, and communicates with an energy storage local coordination controller and a diesel generator local coordination controller; the microgrid is in a grid-connected normal operation state, and when the power grid side loses power unexpectedly, the flow of the embodiment of the microgrid automatic black start control method is shown in fig. 2 and comprises the following steps: when the action condition of the automatic black start control function is met, tripping off the grid-connected point switch and all load incoming line switches; the method comprises the steps of quickly and automatically starting energy storage in a black mode to establish the voltage frequency of a microgrid bus, and recovering important load power supply according to energy storage capacity; and starting the diesel generator to recover the power supply of other loads.
The application scene of the invention is a microgrid control system, the system structure chart is shown in figure 1, a microgrid coordination controller communicates with an energy storage local coordination controller through a GOOSE, receives energy storage state information and sends a control instruction; the microgrid coordination controller is communicated with the diesel generator local coordination controller through the GOOSE, receives the state information of the diesel generator and sends a control instruction; the energy storage local coordination controller is communicated with a plurality of energy storage converters (PCS) through a GOOSE (generic object oriented substation event), receives and gathers state information of each PCS, decomposes and sends a control instruction to each PCS, and the diesel generator local coordination controller is communicated with a plurality of diesel generator controllers through a Modbus, receives and gathers state information of each diesel generator, decomposes and sends the control instruction to each diesel generator.
In the above embodiment, the meeting of the action condition of the automatic black start control function specifically includes: and activating an automatic black start control function and losing voltage of the bus in the microgrid. The activation of the automatic black start control function simultaneously satisfies the following conditions: and an automatic black start control function is put into operation, the system is in a grid-connected state, the voltage frequency of a bus in the microgrid is normal, the microgrid coordination controller is normally communicated with the energy storage local coordination controller or the diesel generator local coordination controller, and the automatic black start control function condition is not locked. The locking automatic black start control function conditions comprise: the automatic black start control function is quitted, the bus in the microgrid fails, the grid-connected point switch fails to trip, the grid-connected point switch is manually separated, the automatic black start control action is finished, and the communication between the microgrid coordinated controller and the energy storage local coordinated controller as well as the communication between the microgrid coordinated controller and the diesel generator local coordinated controller are interrupted; and if any condition exists, the automatic black start control function is immediately locked. Fig. 3 is a functional activation logic diagram of an automatic black start control method for a piconet.
In a preferred embodiment, satisfying the auto black start control function operation condition based on the above further includes: and waiting for the completion of the line reclosing and the spare power automatic switching.
As shown in fig. 4, in the embodiment, the fast and automatic black start of energy storage to establish the voltage frequency of the microgrid bus, and the step of recovering the power supply of the important load according to the energy storage capacity includes:
s11: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the operation enters S12;
s12: starting energy storage and recovering the bus voltage frequency, and entering S13;
s13: and after the energy storage is started successfully and the voltage frequency of the bus is recovered, recovering the loads one by one according to the priority level according to the energy storage capacity.
In the embodiment shown in fig. 5, if the energy storage start-up fails or the bus voltage frequency recovery fails in step S12, the method proceeds to
S14: sending an off-grid mode command and a black start command to a diesel generator coordinated controller; proceeding to step S15;
s15: judging whether the diesel generator is started successfully and the bus voltage frequency is recovered, if so, entering S16, otherwise, ending the automatic black start control action;
s16: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
In the embodiment shown in fig. 6, the step of starting the diesel generator and recovering the power supply of other loads comprises:
s21: sending a grid-connected mode command and a starting command to the diesel generator local coordination controller, and entering S22;
s22: after the diesel generator is started successfully, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering S23;
s23: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
Fig. 2 shows a logic diagram for activating functions of an automatic black start control method of a microgrid, and the automatic black start control function is immediately locked when any one of the following conditions exists: the automatic black start control function is quitted, the bus in the microgrid fails, the grid-connected point switch fails to trip, the grid-connected point switch is manually separated, the automatic black start control action is finished, and the communication between the microgrid coordinated controller and the energy storage local coordinated controller as well as the communication between the microgrid coordinated controller and the diesel generator local coordinated controller are interrupted; and the automatic black start control function is activated by time delay when the following conditions are met: and an automatic black start control function is put into operation, the system is in a grid-connected state, the voltage frequency of a bus in the microgrid is normal, the microgrid coordination controller is normally communicated with the energy storage local coordination controller or the diesel generator local coordination controller, and the automatic black start control function condition is not locked.
And when the following conditions are met, the control action of automatic black start is carried out: and activating an automatic black start control function, losing voltage of a bus in the microgrid, and waiting for the completion of circuit reclosing and spare power automatic switching actions.
An action flow chart of the microgrid automatic black start control method is shown in fig. 7, and the method specifically comprises the following steps:
s31: the microgrid coordinated controller trips a grid-connected point switch and all load incoming line switches, and the step S32 is carried out;
s32: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the step S33 is executed;
s33: if the energy storage starting is successful and the bus voltage frequency is recovered, loads are recovered one by one according to the priority according to the energy storage capacity, a grid-connected mode command and a starting command are sent to the diesel generator local coordination controller, and the step S34 is executed, otherwise, the step S35 is executed;
s34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering step S36, otherwise, ending the automatic black start control action;
s35: sending an off-grid mode command and a black start command to a diesel generator coordination controller, if the diesel generator is successfully started and the bus voltage frequency is recovered, entering a step S36, and if the diesel generator is not successfully started and the bus voltage frequency is recovered, ending an automatic black start control action;
s36: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
In the embodiment of the application, the microgrid coordinated controller acquires microgrid state information and communicates with a power supply in a microgrid, the running state change of a system can be accurately and quickly recognized, when the system has power failure accidentally, load shedding is firstly carried out, then energy storage is started and a diesel generator is started to quickly recover load power supply, the power failure time of important loads can be greatly shortened, and the method has great significance for stable and reliable running of the microgrid.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (10)
1. A microgrid automatic black start control method is characterized in that a black start power supply in a microgrid comprises an energy storage and a diesel generator, and the method comprises the following steps:
the micro-grid coordination controller acquires the voltage frequencies of the micro-grid side and the power grid side and the positions of the switches of the grid-connected points, and communicates with the energy storage local coordination controller and the diesel generator local coordination controller;
the microgrid is in a grid-connected normal operation state, and when the power grid side loses power accidentally and the action condition of the automatic black start control function is met, the grid-connected point switch and all load incoming line switches are tripped;
the method comprises the steps of quickly and automatically starting energy storage in a black mode to establish the voltage frequency of a microgrid bus, and recovering important load power supply according to energy storage capacity;
and starting the diesel generator to recover the power supply of other loads.
2. The microgrid automatic black start control method of claim 1, characterized in that:
the microgrid coordination controller is communicated with the energy storage local coordination controller through the GOOSE, receives energy storage state information and sends a control command;
the microgrid coordination controller is communicated with the diesel generator local coordination controller through the GOOSE, receives the state information of the diesel generator and sends a control instruction;
the energy storage local coordination controller is communicated with a plurality of energy storage converters PCS through GOOSE, receives and summarizes state information of each PCS, decomposes and sends a control instruction to each PCS;
the on-site coordination controller of the diesel generator is communicated with the plurality of diesel generator controllers through the Modbus, receives and summarizes the state information of each diesel generator, and decomposes and sends a control instruction to each diesel generator.
3. The microgrid automatic black start control method of claim 1, characterized in that: the operation condition meeting the automatic black start control function specifically comprises the following steps: and activating an automatic black start control function and losing voltage of the bus in the microgrid.
4. The microgrid automatic black start control method of claim 3, characterized in that: the method for meeting the action condition of the automatic black start control function further comprises the following steps: and waiting for the completion of the line reclosing and the spare power automatic switching.
5. The microgrid automatic black start control method of claim 3, characterized in that: the activation of the automatic black start control function simultaneously satisfies the following conditions: and an automatic black start control function is put into operation, the system is in a grid-connected state, the voltage frequency of a bus in the microgrid is normal, the microgrid coordination controller is normally communicated with the energy storage local coordination controller or the diesel generator local coordination controller, and the automatic black start control function condition is not locked.
6. The microgrid automatic black start control method of claim 5, characterized in that: the locking automatic black start control function conditions comprise: the automatic black start control function is quitted, the bus in the microgrid fails, the grid-connected point switch fails to trip, the grid-connected point switch is manually separated, the automatic black start control action is finished, and the communication between the microgrid coordinated controller and the energy storage local coordinated controller as well as the communication between the microgrid coordinated controller and the diesel generator local coordinated controller are interrupted; and if any condition exists, the automatic black start control function is immediately locked.
7. The microgrid automatic black start control method of claim 1, characterized in that:
the quick automatic black-start energy storage micro-grid bus voltage frequency establishment method includes the following steps of:
step 11: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the step 12 is entered;
step 12: starting energy storage and recovering the bus voltage frequency, and entering step 13;
step 13: and after the energy storage is started successfully and the voltage frequency of the bus is recovered, recovering the loads one by one according to the priority level according to the energy storage capacity.
8. The microgrid automatic black start control method of claim 1, characterized in that:
the starting of the diesel generator and the restoration of power supply of other loads specifically comprise:
step 21: sending a grid-connected mode command and a starting command to the diesel generator local coordination controller, and entering step 22;
step 22: after the diesel generator is started successfully, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering step 23;
step 23: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
9. The microgrid automatic black start control method of claim 8, characterized in that: if the energy storage starting fails or the bus voltage frequency recovery fails in the step 12, the method enters into
Step 14: sending an off-grid mode command and a black start command to a diesel generator coordinated controller; entering step 15;
step 15: judging whether the diesel generator is started successfully and the bus voltage frequency is recovered, if so, entering step 16, otherwise, finishing the automatic black start control action;
step 16: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
10. The microgrid automatic black start control method of claim 1, characterized in that: and when the action condition of the automatic black start control function is met, executing the following control flow:
step 31: the microgrid coordinated controller trips a grid-connected point switch and all load incoming line switches, and the step 32 is carried out;
step 32: the microgrid coordinated controller sends an off-grid mode command and a black start command to the energy storage local coordinated controller, and the step 33 is entered;
step 33: if the energy storage starting is successful and the bus voltage frequency is recovered, recovering the load one by one according to the priority level according to the energy storage capacity, sending a grid-connected mode command and a starting command to the diesel generator local coordination controller, and entering step 34, or entering step 35;
step 34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator local coordination controller, sending a grid-connected mode command to the energy storage local coordination controller, and entering step 36, otherwise, ending the automatic black start control action;
step 35: sending an off-grid mode command and a black start command to a diesel generator coordination controller, if the diesel generator is successfully started and the bus voltage frequency is recovered, entering a step 36, and if the diesel generator is not successfully started and the bus voltage frequency is recovered, ending the automatic black start control action;
step 36: and recovering the loads one by one according to the priority according to the capacity of the diesel generator, and ending the automatic black start control action.
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