CN109217318B - Energy router-based off-grid island multi-microgrid coordinated operation control method - Google Patents
Energy router-based off-grid island multi-microgrid coordinated operation control method Download PDFInfo
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- CN109217318B CN109217318B CN201811276562.3A CN201811276562A CN109217318B CN 109217318 B CN109217318 B CN 109217318B CN 201811276562 A CN201811276562 A CN 201811276562A CN 109217318 B CN109217318 B CN 109217318B
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The invention provides an off-grid island multi-microgrid coordinated operation control method based on an energy router, which comprises the following steps: according to the characteristics of the demand of a plurality of micro-grid systems on the power energy router in the comprehensive utilization of island energy, comprehensively considering the factors of new energy access, load demand and power quality targets, and establishing a configuration rule of the power energy router; the coordination control mode of the power energy router is determined by combining the coordination control, the operation mode and the power flow distribution control requirements of the multi-microgrid system, and the application of the multi-port multi-voltage-level power energy router in the off-grid island energy comprehensive utilization is realized; and the switching of the multi-microgrid grid-connected mode and the off-grid mode of the power energy router is realized by considering the scheduling instruction and the microgrid fault condition. The invention mainly solves the difficult problem of capacity configuration of multi-type distributed power generation, energy storage and load of the off-grid island, and realizes the tidal current interconnection of the island multi-microgrid by utilizing the energy router.
Description
Technical Field
The invention belongs to the technical field of power grid control, and particularly relates to an off-grid island multi-microgrid coordinated operation control method based on an energy router.
Background
At present, nearly one million residents live in coastal and island areas with power shortage or little power in the country. For large archipels, the power demand and reliability are high, so that the continents are often networked by sea cables. However, once onshore power supply facilities such as a submarine cable and the like have faults, the power supply recovery time of the island is long, and the stability of the island energy supply is difficult to ensure by the conventional diesel power generation system. And the diesel oil is difficult to transport and has higher cost. For other remote islands, due to the limited maximum load, long transportation distance and narrow island area, laying of submarine cables is technically and economically more costly, and therefore, the development of clean and reliable island power grids around renewable energy sources is more required. It is worth noting that most islands and their surroundings possess abundant offshore renewable energy sources, such as wind energy, wave energy, tidal current energy, solar energy, etc. By constructing an efficient and clean island energy system, particularly developing an island power grid containing various renewable energy sources for power generation vigorously, the problems of primary energy shortage and the like of islands can be solved, and the method is also beneficial to protecting marine environment and promoting energy conservation and emission reduction. Aiming at the difficult problems of difficult water and power supply, energy use for life and the like of islands, the construction of an off-net island energy comprehensive utilization system with various new energy power supply, seawater desalination, hydrogen production and the like is particularly critical to the development of off-net islands.
Disclosure of Invention
The invention mainly solves the difficult problem of capacity configuration of multi-type distributed power generation, energy storage and load of the off-grid island, and realizes the tidal current interconnection of the island multi-microgrid by utilizing the energy router.
The invention specifically relates to an off-network island multi-microgrid coordinated operation control method based on an energy router, which specifically comprises the following steps:
step (1): according to the characteristics of the demand of a plurality of micro-grid systems on the power energy router in the comprehensive utilization of island energy, comprehensively considering the factors of new energy access, load demand and power quality targets, and establishing a configuration rule of the power energy router;
step (2): verifying the configuration modes of the power, the capacity, the voltage level and the port characteristics of the power energy router through simulation;
and (3): determining a routing control mode of the power energy router, realizing the fusion of energy flow and information flow of multiple micro-grids, and improving the transmission efficiency of energy;
and (4): analyzing a plurality of different topological structures of the power energy router, analyzing the characteristics of the different topological structures in the aspects of power flow control and voltage stability control under different application modes or scenes, and realizing the multi-port multi-voltage-level power energy router;
and (5): the coordination control mode of the power energy router is determined by combining the coordination control, the operation mode and the power flow distribution control requirements of the multi-microgrid system, and the application of the multi-port multi-voltage-level power energy router in the off-grid island energy comprehensive utilization is realized;
and (6): determining voltage and frequency control modes of a plurality of micro-grids according to the networking mode and the load demand condition of the island micro-grid;
and (7): determining the starting time sequence of each micro-grid to ensure that each micro-grid can be started and operated normally;
and (8): the multi-microgrid grid-connected and off-grid mode switching of the power energy router is realized by considering a scheduling instruction and a microgrid fault condition;
and (9): fault identification, positioning and rapid isolation based on the island microgrid system, and fault information processing and analysis are carried out according to the fault property, the fault position and the fault time period;
step (10): analyzing typical characteristics of fault elements and response characteristics of non-fault areas/elements of the island microgrid system;
step (11): analyzing the applicability and complementarity of the DC system typical fault identification method in the DC power supply system, and determining a fault identification positioning method capable of meeting the protection requirement of the DC power supply system;
step (12): based on the matching relation of distributed power generation and energy storage capacity, load capacity requirements are defined, and the problem of black start control time sequence under the condition of island microgrid faults is solved;
step (13): and determining a black start control strategy for dealing with impact load access aiming at the impact load access condition.
Further, the fault property in the step (9) comprises a transient fault and a permanent fault.
Detailed Description
The following describes a detailed implementation of the off-grid island multi-microgrid coordinated operation control method based on the energy router.
The invention relates to an off-network island multi-microgrid coordinated operation control method based on an energy router, which specifically comprises the following steps:
step (1): according to the characteristics of the demand of a plurality of micro-grid systems on the power energy router in the comprehensive utilization of island energy, comprehensively considering the factors of new energy access, load demand and power quality targets, and establishing a configuration rule of the power energy router;
step (2): verifying the configuration modes of the power, the capacity, the voltage level and the port characteristics of the power energy router through simulation;
and (3): determining a routing control mode of the power energy router, realizing the fusion of energy flow and information flow of multiple micro-grids, and improving the transmission efficiency of energy;
and (4): analyzing a plurality of different topological structures of the power energy router, analyzing the characteristics of the different topological structures in the aspects of power flow control and voltage stability control under different application modes or scenes, and realizing the multi-port multi-voltage-level power energy router;
and (5): the coordination control mode of the power energy router is determined by combining the coordination control, the operation mode and the power flow distribution control requirements of the multi-microgrid system, and the application of the multi-port multi-voltage-level power energy router in the off-grid island energy comprehensive utilization is realized;
and (6): determining voltage and frequency control modes of a plurality of micro-grids according to the networking mode and the load demand condition of the island micro-grid;
and (7): determining the starting time sequence of each micro-grid to ensure that each micro-grid can be started and operated normally;
and (8): the multi-microgrid grid-connected and off-grid mode switching of the power energy router is realized by considering a scheduling instruction and a microgrid fault condition;
and (9): fault identification, positioning and rapid isolation are carried out on the basis of the island micro-grid system, and fault information is processed and analyzed according to the fault property, the fault position and the fault time period;
step (10): analyzing typical characteristics of fault elements and response characteristics of non-fault areas/elements of the island microgrid system;
step (11): analyzing the applicability and complementarity of the DC system typical fault identification method in the DC power supply system, and determining a fault identification positioning method capable of meeting the protection requirement of the DC power supply system;
step (12): based on the matching relation of distributed power generation and energy storage capacity, load capacity requirements are defined, and the problem of black start control time sequence under the condition of island microgrid faults is solved;
step (13): and determining a black start control strategy for dealing with impact load access aiming at the impact load access condition.
The fault property in the step (9) comprises a transient fault and a permanent fault.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. The multi-microgrid coordinated operation control method for the off-grid island based on the energy router is characterized by comprising the following steps of:
step (1): according to the characteristics of the demand of a plurality of micro-grid systems on the power energy router in the comprehensive utilization of island energy, comprehensively considering the factors of new energy access, load demand and power quality targets, and establishing a configuration rule of the power energy router;
step (2): verifying the configuration modes of the power, the capacity, the voltage level and the port characteristics of the power energy router through simulation;
and (3): determining a routing control mode of the power energy router, realizing the fusion of energy flow and information flow of multiple micro-grids, and improving the transmission efficiency of energy;
and (4): analyzing a plurality of different topological structures of the power energy router, analyzing the characteristics of the different topological structures in the aspects of power flow control and voltage stability control under different application modes or scenes, and realizing the multi-port multi-voltage-level power energy router;
and (5): the coordination control mode of the power energy router is determined by combining the coordination control, the operation mode and the power flow distribution control requirements of the multi-microgrid system, and the application of the multi-port multi-voltage-level power energy router in the off-grid island energy comprehensive utilization is realized;
and (6): determining voltage and frequency control modes of a plurality of micro-grids according to the networking mode and the load demand condition of the island micro-grid;
and (7): determining the starting time sequence of each micro-grid to ensure that each micro-grid can be started and operated normally;
and (8): the multi-microgrid grid-connected and off-grid mode switching of the power energy router is realized by considering a scheduling instruction and a microgrid fault condition;
and (9): fault identification, positioning and rapid isolation are carried out on the basis of the island micro-grid system, and fault information is processed and analyzed according to the fault property, the fault position and the fault time period;
step (10): analyzing typical characteristics of fault elements and response characteristics of non-fault areas/elements of the island microgrid system;
step (11): analyzing the applicability and complementarity of the DC system typical fault identification method in the DC power supply system, and determining a fault identification positioning method capable of meeting the protection requirement of the DC power supply system;
step (12): based on the matching relation between distributed power generation and energy storage capacity, load capacity requirements are defined, and the problem of black start control time sequence under the condition of island microgrid failure is solved;
step (13): aiming at the impact load access condition, determining a black start control strategy for dealing with the impact load access;
the fault property in the step (9) comprises a transient fault and a permanent fault.
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| CN106655267A (en) * | 2016-12-26 | 2017-05-10 | 上海电力学院 | Energy local area network considering multi-micro-grid interaction and control method |
| CN107508303A (en) * | 2017-08-09 | 2017-12-22 | 国电南瑞科技股份有限公司 | A kind of modularization energy storage device towards micro-capacitance sensor is distributed rationally and control method |
| CN107784382A (en) * | 2016-08-31 | 2018-03-09 | 北京南瑞电研华源电力技术有限公司 | User side energy internet planing method based on energy source router |
| CN108281987A (en) * | 2018-01-12 | 2018-07-13 | 中国电力科学研究院南京分院 | A kind of energy source router applied to island microgrid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9118205B2 (en) * | 2012-06-20 | 2015-08-25 | Institute Of Nuclear Energy Research Atomic Energy Council, Executive Yuan | Microgrid power distribution system and power flow asymmetrical fault analysis method therefor |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104123683A (en) * | 2014-08-01 | 2014-10-29 | 华中科技大学 | Electrical power system black-start scheme generation method based on dynamic programming |
| CN107784382A (en) * | 2016-08-31 | 2018-03-09 | 北京南瑞电研华源电力技术有限公司 | User side energy internet planing method based on energy source router |
| CN106655267A (en) * | 2016-12-26 | 2017-05-10 | 上海电力学院 | Energy local area network considering multi-micro-grid interaction and control method |
| CN107508303A (en) * | 2017-08-09 | 2017-12-22 | 国电南瑞科技股份有限公司 | A kind of modularization energy storage device towards micro-capacitance sensor is distributed rationally and control method |
| CN108281987A (en) * | 2018-01-12 | 2018-07-13 | 中国电力科学研究院南京分院 | A kind of energy source router applied to island microgrid |
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