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Master-slave strategy-based microgrid system coordination control method

A technology of coordinated control and micro-grid, which is applied in the field of coordinated control of micro-grid systems, can solve problems such as difficult to meet the stable operation of micro-grid systems, achieve strong robustness and rapidity, flexible power flow control, and meet the effects of stable operation

Inactive Publication Date: 2010-12-29
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing inverter products and technologies are difficult to form a microgrid, and it is difficult to meet the needs of stable operation of the microgrid system. So far, the multifunctional inverter control technology suitable for microgrids is still blank

Method used

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  • Master-slave strategy-based microgrid system coordination control method
  • Master-slave strategy-based microgrid system coordination control method
  • Master-slave strategy-based microgrid system coordination control method

Examples

Experimental program
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Embodiment Construction

[0017] Such as figure 1 As shown, the microgrid is composed of one or more groups of photovoltaic power generation systems, battery energy storage systems, important and non-important loads, microgrid control systems and microgrid grid-connected circuit breakers. The battery energy storage system consists of battery Group and bidirectional inverter, all the power supply and load are connected to the low-voltage 0.4kV bus. The microgrid control system detects the voltage on the grid side of the microgrid-connected circuit breaker as the basis for judging whether the external grid is faulty. The micro-grid control system can control the opening and closing of the micro-grid grid-connected circuit breaker, control the switching between the grid-connected operation mode and the independent operation mode of the bidirectional inverter for energy storage, and can also communicate with the photovoltaic grid-connected inverter , shut down one or more groups of photovoltaic power gene...

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Abstract

The invention discloses a microgrid system coordination control method which takes a storage battery energy storage system as a main power supply. The conventional inversion products and technology hardly form a microgrid and cannot meet the requirement on stable operation of the microgrid system. The storage battery energy storage system in the microgrid is taken as a main power supply when the microgrid independently works, the microgrid frequency and voltage are kept constant, and a distributed power supply controls the power along with the microgrid voltage and a phase angle; and a microgrid control system controls a bidirectional inverter for energy storage to effectively switch between a parallel control mode and an independent operation mode according to the state of an external power grid. The power supply in the microgrid has the advantages of high robustness, high speed, and capacities of realizing bidirectional flow of electric energy and flexible current control and meeting the requirement on stable operation of the microgrid system.

Description

technical field [0001] The invention belongs to the field of micro-grid systems for distributed power generation in power systems, in particular to a coordinated control method for a micro-grid system using a storage battery energy storage system as a main power source. Background technique [0002] Connecting the distributed generation energy supply system to the large power grid in the form of a microgrid for parallel operation and supporting each other with the large power grid is the most effective way to maximize the performance of the distributed generation energy supply system. Microgrid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads, monitoring and protection devices. It is an autonomous system that can realize self-control, protection and management. It can be operated in parallel with the large power grid, or it can be operated in isolation. [0003]...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/38
CPCY02E70/30Y02E10/566Y02E10/563Y02E10/56
Inventor 赵波张雪松郭力童杭伟
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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