CN113675876B - Automatic black start control method for micro-grid - Google Patents
Automatic black start control method for micro-grid Download PDFInfo
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- CN113675876B CN113675876B CN202010405165.2A CN202010405165A CN113675876B CN 113675876 B CN113675876 B CN 113675876B CN 202010405165 A CN202010405165 A CN 202010405165A CN 113675876 B CN113675876 B CN 113675876B
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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
-
- 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
-
- 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 application discloses a micro-grid automatic black start control method, wherein a black start power supply in a micro-grid is an energy storage and diesel generator, and a micro-grid coordination controller collects voltage frequency of a micro-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; when the grid side is in a grid-connected normal operation state, after the power is accidentally lost, the grid-connected point switch and all load incoming line switches are disconnected, the energy storage is quickly and automatically started in a black mode to establish the busbar voltage frequency of the micro-grid and restore the important load power supply, the power failure time of the important load is shortened, then the diesel generator is started to restore the power supply of other loads, the power supply reliability of the micro-grid system is improved, and the micro-grid system is suitable for practical engineering application.
Description
Technical Field
The application relates to the field of micro-grid control, in particular to an automatic black start control method for a micro-grid.
Background
When the micro-grid is normally connected, the energy storage converter 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 accidentally cut off, the micro-grid alternating-current bus suddenly loses the frequency voltage support of the power grid, the converter acts on voltage or current protection to stop, so that the load loses power, and at the moment, if an operator participates in the system black start, the operation is required to be performed in one step according to an operation rule, the power recovery time is long, the system loses power again due to easy error, and important load is seriously influenced to recover the power.
Disclosure of Invention
The application aims to provide an automatic black start control method for a micro-grid, which is suitable for a micro-grid control system, and can quickly and automatically start energy storage in the micro-grid and recover load power supply of a diesel generator when the micro-grid system fails accidentally.
In order to achieve the above object, the solution of the present application is: the utility model provides a black start control method of microgrid automation, black start power supply includes energy storage and diesel generator in the microgrid, control method includes:
the micro-grid coordination controller collects voltage frequency and grid-side grid-connected point switch positions of the micro-grid side and the grid-side, and communicates with the energy storage local coordination controller and the diesel generator local coordination controller;
when the micro-grid is in a grid-connected normal operation state and the power grid side is accidentally powered off, the grid-connected point switch and all load incoming line switches are tripped when the action condition of the automatic black start control function is met;
fast and automatically starting energy storage to establish voltage frequency of a micro-grid busbar, and recovering important load power supply according to energy storage capacity;
and starting the diesel generator and recovering power supply of other loads.
In a preferred scheme, the micro-grid coordination controller communicates with the energy storage local coordination controller through GOOSE, receives energy storage state information and sends a control instruction;
the micro-grid coordination controller is communicated with the diesel generator local coordination controller through GOOSE, receives the state information of the diesel generator and sends a control command;
the energy storage on-site coordination controller is communicated with the PCS of the plurality of energy storage converters through GOOSE, receives and gathers the state information of each PCS, decomposes and sends a control instruction to each PCS;
the diesel generator on-site coordination controller is communicated with the diesel generator controllers through Modbus, receives and gathers the state information of each diesel generator, decomposes and sends control instructions to each diesel generator.
In a preferred scheme, the method for meeting the action condition of the automatic black start control function specifically comprises the following steps: the automatic black start control function is activated and the bus in the micro-grid is out of voltage.
In a preferred embodiment, the meeting of the action condition of the automatic black start control function further includes: and waiting for the circuit reclosing and the spare power automatic switching action to be completed.
In a preferred embodiment, the automatic black start control function is activated while satisfying the following conditions: the automatic black start control function is put into, the system is in a grid-connected state, the busbar voltage frequency in the micro-grid is normal, the micro-grid coordination controller is communicated with the energy storage on-site coordination controller or the diesel generator on-site coordination controller normally, and the automatic black start control function condition is not blocked.
In a preferred embodiment, the locking automatic black start control function condition includes: exiting the automatic black start control function, failing the bus in the micro-grid, failing the tripping of the grid-connected point switch, manually separating the grid-connected point switch, ending the automatic black start control action, and interrupting the communication between the micro-grid coordination controller and the energy storage on-site coordination controller as well as between the micro-grid coordination controller and the diesel generator on-site coordination controller; the automatic black start control function is immediately blocked if either condition exists.
In a preferred scheme, the fast automatic black start energy storage establishes micro-grid busbar voltage frequency, and the recovery of important load power supply according to energy storage capacity specifically comprises:
step 11: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and the step 12 is entered;
step 12: the energy storage starts and recovers the busbar voltage frequency, and the step 13 is entered;
step 13: and after the energy storage is successfully started and the busbar voltage frequency is recovered, recovering loads one by one according to the priority according to the energy storage capacity.
In a preferred scheme, the starting of the diesel generator and the recovery of other load power supplies specifically include:
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 successfully started, sending an off-grid mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, and entering step 23;
step 23: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
In a preferred embodiment, if the energy storage start-up fails or the bus voltage frequency recovery fails in step 12, the process proceeds to
Step 14: sending an off-grid mode command and a black start command to a diesel generator coordination controller; step 15 is entered;
step 15: judging whether the diesel generator is started successfully and the bus voltage frequency is recovered, if so, entering a step 16, otherwise, ending the automatic black start control action;
step 16: and recovering the loads one by one according to the capacity of the diesel generator and priority, 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 micro-grid coordination controller jumps off the grid-connected point switch and all load incoming line switches, and then the step 32 is entered;
step 32: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and the step 33 is entered;
step 33: if the energy storage is successfully started and the bus voltage frequency is recovered, recovering loads one by one according to the energy storage capacity and priority, sending a grid-connected mode command and a starting command to an on-site coordination controller of the diesel generator, entering a step 34, otherwise entering a step 35;
step 34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, entering a step 36, and if not, ending the automatic black start control action;
step 35: sending an off-grid mode command and a black start command to the diesel generator coordination controller, if the diesel generator is started successfully and the bus voltage frequency is recovered, entering a step 36, otherwise, ending the automatic black start control action;
step 36: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
The beneficial effects of the application are as follows:
the application provides a micro-grid automatic black start control method, wherein a micro-grid coordination controller collects voltage frequency and grid-connected point switch positions of a micro-grid side and a power grid side, and communicates with an energy storage local coordination controller and a diesel generator local coordination controller, so that the change of the running state of a system can be accurately and quickly identified, when the system fails accidentally and meets the automatic black start action condition, load relief is automatically carried out, the energy storage is automatically black started, and the diesel generator quickly resumes load power supply, thereby greatly shortening the important load power failure time and improving the power supply reliability of the micro-grid.
Drawings
Fig. 1 is a system structure diagram of a micro-grid automatic black start control method.
Fig. 2 is a flowchart of an embodiment of a method for controlling automatic black start of a micro-grid.
Fig. 3 is a functional activation logic diagram of a micro-grid automatic black start control method.
Fig. 4 is a flow chart of the stored energy start-up recovery load.
Fig. 5 is a flow chart of a stored energy start-up failure process.
Fig. 6 is a diesel generator start-up recovery load flow diagram.
Fig. 7 is an action flow chart of a micro-grid automatic black start control method.
Detailed Description
The technical scheme of the present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a system structure diagram of the automatic black start control method of the micro-grid is shown, a black start power supply in the micro-grid is an energy storage and diesel generator, and a micro-grid coordination controller collects voltage frequency of the micro-grid side and the power grid side and the grid-connected point switch position and communicates with an energy storage on-site coordination controller and an on-site coordination controller of the diesel generator; the micro-grid is in a grid-connected normal operation state, and when the power is accidentally lost at the power grid side, the flow of the embodiment of the micro-grid automatic black start control method is shown in the figure 2, and the method comprises the following steps: when the action condition of the automatic black start control function is met, the grid-connected point switch and all load incoming line switches are disconnected; fast and automatically starting energy storage to establish voltage frequency of a micro-grid busbar, and recovering important load power supply according to energy storage capacity; and starting the diesel generator and recovering power supply of other loads.
The application has the application scene of a micro-grid control system, a system structure diagram is shown in figure 1, and a micro-grid coordination controller communicates with an energy storage local coordination controller through GOOSE, receives energy storage state information and sends a control instruction; the micro-grid coordination controller is communicated with the diesel generator local coordination controller through GOOSE, receives the state information of the diesel generator and sends a control command; the energy storage on-site coordination controller is communicated with the PCS of the plurality of energy storage converters through GOOSE, receives and gathers the status information of each PCS, decomposes and sends a control instruction to each PCS, and the diesel generator on-site coordination controller is communicated with the plurality of diesel generator controllers through Modbus, receives and gathers the status information of each diesel generator, decomposes and sends a 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: the automatic black start control function is activated and the bus in the micro-grid is out of voltage. The automatic black start control function is activated while satisfying the following conditions: the automatic black start control function is put into, the system is in a grid-connected state, the busbar voltage frequency in the micro-grid is normal, the micro-grid coordination controller is communicated with the energy storage on-site coordination controller or the diesel generator on-site coordination controller normally, and the automatic black start control function condition is not blocked. The locking automatic black start control function conditions include: exiting the automatic black start control function, failing the bus in the micro-grid, failing the tripping of the grid-connected point switch, manually separating the grid-connected point switch, ending the automatic black start control action, and interrupting the communication between the micro-grid coordination controller and the energy storage on-site coordination controller as well as between the micro-grid coordination controller and the diesel generator on-site coordination controller; the automatic black start control function is immediately blocked if either condition exists. Fig. 3 is a logic diagram showing the function activation of the automatic black start control method of the micro-grid.
In a preferred embodiment, the meeting of the automatic black start control function action condition on the basis of the above further includes: and waiting for the circuit reclosing and the spare power automatic switching action to be completed.
As shown in the embodiment of fig. 4, the steps of quickly and automatically starting energy storage to establish the voltage frequency of the micro-grid bus and recovering the power supply of the important load according to the energy storage capacity include:
s11: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and S12 is entered;
s12: the energy storage starts and recovers the busbar voltage frequency, and S13 is entered;
s13: and after the energy storage is successfully started and the busbar voltage frequency is recovered, recovering loads one by one according to the priority according to the energy storage capacity.
As in the embodiment shown in fig. 5, if the stored energy start-up fails or the bus voltage frequency recovery fails in step S12, the process proceeds to
S14: sending an off-grid mode command and a black start command to a diesel generator coordination controller; step S15 is entered;
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 capacity of the diesel generator and priority, 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 supplied by other loads includes:
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 successfully started, sending a grid-off mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, and entering S23;
s23: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
A logic diagram of the automatic black start control method of the micro-grid is shown in fig. 2, and the automatic black start control function is immediately locked when any one of the following conditions exists: exiting the automatic black start control function, failing the bus in the micro-grid, failing the tripping of the grid-connected point switch, manually separating the grid-connected point switch, ending the automatic black start control action, and interrupting the communication between the micro-grid coordination controller and the energy storage on-site coordination controller as well as between the micro-grid coordination controller and the diesel generator on-site coordination controller; meanwhile, the automatic black start control function is activated through delay when the following conditions are met: the automatic black start control function is put into, the system is in a grid-connected state, the busbar voltage frequency in the micro-grid is normal, the micro-grid coordination controller is communicated with the energy storage on-site coordination controller or the diesel generator on-site coordination controller normally, and the automatic black start control function condition is not blocked.
And simultaneously, the automatic black start control action is performed when the following conditions are met: and (3) activating an automatic black start control function, wherein a bus in the micro-grid loses voltage, and waiting for the line reclosing and the spare power automatic switching action to be completed.
An action flow chart of the automatic black start control method of the micro-grid is shown in fig. 7, and the specific steps are as follows:
s31: the micro-grid coordination controller jumps off the grid-connected point switch and all load incoming line switches, and enters step S32;
s32: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and the step S33 is entered;
s33: if the energy storage is successfully started and the bus voltage frequency is recovered, recovering loads one by one according to the energy storage capacity and priority, sending a grid-connected mode command and a starting command to an on-site coordination controller of the diesel generator, and entering a step S34, otherwise, entering a step S35;
s34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, and entering into a step S36, otherwise, ending the automatic black start control action;
s35: sending an off-grid mode command and a black start command to the diesel generator coordination controller, if the diesel generator is started successfully and the bus voltage frequency is recovered, entering a step S36, otherwise, ending the automatic black start control action;
s36: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
In the embodiment of the application, the micro-grid coordination controller collects micro-grid state information, communicates with a power supply in the micro-grid, can accurately and quickly identify the running state change of the system, firstly carries out load relief when the system fails accidentally, then starts the energy storage and diesel generator to quickly recover load power supply, can greatly shorten the important load power failure time, and has great significance for the stable and reliable running of the micro-grid.
The above embodiments are only for illustrating the technical idea of the present application, and the protection scope of the present application is not limited thereto, and any modification made on the basis of the technical scheme according to the technical idea of the present application falls within the protection scope of the present application.
Claims (8)
1. The automatic black start control method for the micro-grid is characterized by comprising the following steps of:
the micro-grid coordination controller collects voltage frequency and grid-side grid-connected point switch positions of the micro-grid side and the grid-side, and communicates with the energy storage local coordination controller and the diesel generator local coordination controller;
when the micro-grid is in a grid-connected normal operation state and the power grid side is accidentally powered off, the grid-connected point switch and all load incoming line switches are tripped when the action condition of the automatic black start control function is met; fast and automatically starting energy storage to establish voltage frequency of a micro-grid busbar, and recovering important load power supply according to energy storage capacity; starting a diesel generator, and recovering power supply of other loads; the meeting of the action conditions of the automatic black start control function specifically comprises the following steps: activating an automatic black start control function and performing voltage loss on a bus in the micro-grid;
specifically, after the action condition of the automatic black start control function is satisfied, the following control flow is executed:
step 31: the micro-grid coordination controller jumps off the grid-connected point switch and all load incoming line switches, and then the step 32 is entered;
step 32: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and the step 33 is entered;
step 33: if the energy storage is successfully started and the bus voltage frequency is recovered, recovering loads one by one according to the energy storage capacity and priority, sending a grid-connected mode command and a starting command to an on-site coordination controller of the diesel generator, entering a step 34, otherwise entering a step 35;
step 34: if the diesel generator is successfully started, sending an off-grid mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, entering a step 36, and if not, ending the automatic black start control action;
step 35: sending an off-grid mode command and a black start command to the diesel generator coordination controller, if the diesel generator is started successfully and the bus voltage frequency is recovered, entering a step 36, otherwise, ending the automatic black start control action;
step 36: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
2. The automatic black start control method for micro-grid according to claim 1, wherein:
the micro-grid coordination controller is communicated with the energy storage local coordination controller through GOOSE, receives energy storage state information and sends a control instruction;
the micro-grid coordination controller is communicated with the diesel generator local coordination controller through GOOSE, receives the state information of the diesel generator and sends a control command;
the energy storage on-site coordination controller is communicated with the PCS of the plurality of energy storage converters through GOOSE, receives and gathers the state information of each PCS, decomposes and sends a control instruction to each PCS;
the diesel generator on-site coordination controller is communicated with the diesel generator controllers through Modbus, receives and gathers the state information of each diesel generator, decomposes and sends control instructions to each diesel generator.
3. The automatic black start control method for micro-grid according to claim 1, wherein: meeting the action condition of the automatic black start control function further comprises: and waiting for the circuit reclosing and the spare power automatic switching action to be completed.
4. The automatic black start control method for micro-grid according to claim 1, wherein: the automatic black start control function is activated while satisfying the following conditions: the automatic black start control function is put into, the system is in a grid-connected state, the busbar voltage frequency in the micro-grid is normal, the micro-grid coordination controller is communicated with the energy storage on-site coordination controller or the diesel generator on-site coordination controller normally, and the automatic black start control function condition is not blocked.
5. The automatic black start control method for micro-grid according to claim 4, wherein: the locking automatic black start control function conditions comprise: exiting the automatic black start control function, failing the bus in the micro-grid, failing the tripping of the grid-connected point switch, manually separating the grid-connected point switch, ending the automatic black start control action, and interrupting the communication between the micro-grid coordination controller and the energy storage on-site coordination controller as well as between the micro-grid coordination controller and the diesel generator on-site coordination controller; the automatic black start control function is immediately blocked if either condition exists.
6. The automatic black start control method for micro-grid according to claim 1, wherein:
the quick automatic black start energy storage establishes micro-grid bus voltage frequency, and the important load power supply recovery according to the energy storage capacity specifically comprises the following steps:
step 11: the micro-grid coordination controller sends an off-grid mode command and a black start command to the energy storage on-site coordination controller, and the step 12 is entered;
step 12: the energy storage starts and recovers the busbar voltage frequency, and the step 13 is entered;
step 13: and after the energy storage is successfully started and the busbar voltage frequency is recovered, recovering loads one by one according to the priority according to the energy storage capacity.
7. The automatic black start control method for micro-grid according to claim 1, wherein:
the step of starting the diesel generator and recovering other load power supplies specifically comprises the following steps:
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 successfully started, sending an off-grid mode command to the diesel generator on-site coordination controller, sending a grid-connected mode command to the energy storage on-site coordination controller, and entering step 23;
step 23: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
8. The automatic black start control method for micro-grid according to claim 6, wherein: if the energy storage start fails or the bus voltage frequency recovery fails in the step 12, the method enters
Step 14: sending an off-grid mode command and a black start command to a diesel generator coordination controller; step 15 is entered;
step 15: judging whether the diesel generator is started successfully and the bus voltage frequency is recovered, if so, entering a step 16, otherwise, ending the automatic black start control action;
step 16: and recovering the loads one by one according to the capacity of the diesel generator and priority, and ending the automatic black start control action.
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Citations (13)
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