On-line emergency protection power supply device and its control method based on battery energy storage system

Abstract

The invention provides an online emergent power supply support device based on battery energy storage system and a control method thereof, two sets of multi-scene operation modes of a bidirectional converter and distribution switch are switched and flexibly cooperated, in scenes of single circuit accessing in series, single circuit accessing in parallel and double circuit accessing in parallel, the bidirectional converter in abnormal operating condition is isolated, the scheme is switched to a redundancy scheme, and reliable and flexible power supply support service is realized.

Description

technical field [0001] The invention belongs to the field of emergency power supply protection, and in particular relates to an online emergency power supply device based on a battery energy storage system and a control method thereof. 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] At present, diesel power generation equipment is mostly used as a backup power source, but diesel power generation equipment takes 5 to 30 seconds to start up, the power supply voltage and frequency fluctuate greatly, and the efficiency is low. It can ...

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Problems solved by technology

[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] At present, diesel power generation equipment is mostly used as a backup power source, but the start-up time of diesel power generation equipment is 5-30s long, the power supply voltage and frequency fluctuate greatly, and the efficiency is low. It can only be used as the main power supply in the off-grid state, and seamless switching cannot be achieved.

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