A combined emergency power supply system for a power plant

CN224329267UActive Publication Date: 2026-06-05SUZHOU NUCLEAR POWER RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU NUCLEAR POWER RES INST CO LTD
Filing Date
2025-05-14
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Wear and tear caused by rapid starting of emergency diesel generator sets affects their reliability and service life.

Method used

Design a power plant composite emergency power supply system, including a plant power system, an emergency bus, an emergency diesel generator set, a battery energy storage system, and an emergency switching component. The emergency switching component switches the battery energy storage system to supply power to the load when the plant power system fails, and switches to supply power to the diesel generator set after it starts slowly, thus avoiding rapid start-up.

Benefits of technology

Reduce wear and tear on emergency diesel generator sets caused by rapid startup, extend their service life, and ensure that the load can still receive emergency power during the slow startup of the diesel generator set.

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Abstract

The utility model relates to a kind of power plant composite emergency power supply system, comprising: emergency bus is connected with station service power supply system, emergency diesel generator set, battery energy storage system and electric load respectively;Emergency switching component is connected between the power supply circuit of emergency diesel generator set and emergency bus and the power supply circuit between battery energy storage system and emergency bus respectively, to switch battery energy storage system for electric load emergency power supply when station service power supply system fails and emergency diesel generator set does not complete starting;And after emergency diesel generator set completes starting, switch emergency diesel generator set for electric load emergency power supply, for reducing the wear caused by rapid starting of emergency diesel generator set, and then the service life of emergency diesel generator set can be improved.
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