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Seamless switching method for online power supply protection device based on battery energy storage system

A battery energy storage system, seamless switching technology, applied in circuit devices, flexible AC transmission systems, electrical components, etc., can solve the problems of high price, low efficiency, long start-up time, etc., and achieve flexible power supply services. Effect

Pending Publication Date: 2019-04-26
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Problems solved by technology

At present, diesel generator vehicles are mostly used as backup power sources for mobile emergency power supply. However, diesel generator vehicles take a long time to start, which takes 5-30 seconds. The power supply voltage and frequency fluctuate greatly, and the efficiency is low. They can only be used as the main power supply in the off-grid state. To achieve seamless switching, and the use of diesel generators will inevitably bring environmental and noise pollution
[0004] For the online guaranteed power supply scheme of flywheel energy storage combined with diesel generator vehicles, flywheel energy storage must be used in conjunction with diesel generator vehicles, otherwise most of them can only provide short-term emergency support within minutes. Mature commercial flywheel energy storage systems are basically produced abroad Manufacturers, operation and maintenance are relatively complicated, and the price remains high

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  • Seamless switching method for online power supply protection device based on battery energy storage system
  • Seamless switching method for online power supply protection device based on battery energy storage system
  • Seamless switching method for online power supply protection device based on battery energy storage system

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0049] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a seamless switching method for an online power supply protection device based on a battery energy storage system. Through the flexible cooperation of a multi-scene operationmode and distribution switch switching of two sets of bidirectional converters, under the scenarios of series access, single circuit parallel access and double circuit parallel access, through the corresponding access control, exit control and emergency power supply protection control, seamless switching and smooth transition of input and withdraw and emergency power supply protection of the device are realized, and reliable and flexible power supply protection service is provided.

Description

technical field [0001] The invention relates to the field of emergency power supply protection, in particular to a seamless switching method of an online power supply device based on a battery energy storage system. Background technique [0002] With the increasing dependence of modern society on electric energy, the rapid growth of electricity demand, and the higher and higher requirements for power supply quality, sudden power outages will inevitably cause damage to people's normal life order and the normal operation of society, especially For the particularly important loads in the primary load, once the power supply is interrupted, it will cause significant political influence or economic loss. [0003] As the main force of power grid emergency power supply, mobile emergency power supply vehicles play an increasingly significant role in occasions such as urban power grid emergency response, major natural disasters, and temporary power consumption in areas with power shor...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/38H02J3/388Y02E40/10
Inventor 范元亮郑凌娟
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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