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Method for switching independent operation micro-grid master control power sources

A main control power supply, independent operation technology, applied in the energy industry, single network parallel feeding arrangement, climate sustainability, 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: 2013-12-18
XUJI GRP +2
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  • Abstract
  • Description
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AI Technical Summary

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

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  • Method for switching independent operation micro-grid master control power sources
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Embodiment Construction

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

[0027] The devices that can be used as the main control power supply of the microgrid are conventional small rotary motors (diesel engines, micro gas turbines, small hydroelectric generators, fuel cells), energy storage PCS, and the microgrid main control power supply can initially be a rotary motor or energy storage PCS. The control mode of the motor does not distinguish between the main power mode and the non-main power mode. The energy storage PCS is a power electronic device without inertia. PQ operation mode of power electronic equipment such as power generation (active and reactive output external adjustment mode, at this time, the energy storage PCS follows the system voltage and frequency). The switching between PQ mode and VF mode of PCS can only be carried out when the external control system sends an instruction.

[0028] There is ...

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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 operating microgrid, and belongs to the technical field of microgrid control. Background technique [0002] A microgrid can be regarded as a structure of a power system, including small systems of distributed power sources, loads, and energy storage devices. 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 distribution network provides the frequency and voltage support of the microgrid. When the microgrid operates independently, the frequency and voltage support of the entire microgrid must be provided by a specific power source, which is called the main power source. [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 generator ...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCY02P80/14
Inventor 李富生
Owner XUJI GRP
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