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A method for switching main control power supply of independent running microgrid

A main control power supply, independent operation technology, applied in the energy industry, single-network parallel feeding arrangement, sustainable manufacturing/processing, etc., can solve problems such as main control power supply switching, and achieve the effect of saving fuel costs and reducing environmental pollution

Inactive Publication Date: 2016-02-24
XUJI GRP +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for switching the main control power supply of an independently operated microgrid to solve the current problem of switching the main control power supply in the microgrid

Method used

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  • A method for switching main control power supply of independent running microgrid
  • A method for switching main control power supply of independent running microgrid
  • A method for switching main control power supply of independent running microgrid

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] The equipment that can be used as the main control power supply of the microgrid is a conventional small rotating motor (diesel engine, micro gas turbine, small hydroelectric generator, fuel cell), energy storage PCS, and the main control power supply of the microgrid can initially be a rotating motor or an energy storage PCS. The control method of the motor does not distinguish between the main power supply mode and the non-main power supply mode. The energy storage PCS is a power electronic device without inertia. PQ operation mode of power electronic equipment such as power generation (external adjustment mode of active and reactive power output, at this time, the energy storage PCS follows the system voltage and frequency). The switching between PQ mode and VF mode of PCS needs an instruction from an external control system.

[0...

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Abstract

The invention relates to a method for switching independent operation micro-grid master control power sources and belongs to the field of micro-grid control technologies. Under the condition that at least two power generators exist in a micro-grid system and can serve as the master control power sources, the method can achieve rapid and reasonable switching of the master control power sources during the independent operation of a micro-grid according to distributed type generated output conditions, load conditions, master control power source conditions and energy storage conditions. In addition, while the micro-grid supplies power stably and safely, distributed type power generation is utilized to the maximum, fuel cost is saved, and environment pollution is reduced.

Description

technical field [0001] The invention relates to a method for switching a main control power supply of an independently operated micro-grid, belonging to the technical field of micro-grid control. Background technique [0002] Microgrid can be regarded as a structure of power system, including small systems such as distributed power sources, loads, and energy storage equipment. The microgrid system can work in two modes: grid-connected operation and independent operation. When the microgrid and the distribution network are connected to the grid, the frequency and voltage support of the microgrid is provided by the distribution network. When the microgrid operates independently, the frequency and voltage support of the entire microgrid must be provided by a specific power supply, which we call the main power supply. [0003] In a conventional independent power supply system, a rotating electrical machine is usually used as the main control power supply, such as a diesel gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCY02P80/14
Inventor 李富生刘志伟王军生王哲辛永峰
Owner XUJI GRP
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