Energy-accumulating system module for power emergency power supply of nuclear power plant

Abstract

The invention provides an energy-accumulating system module for a power emergency power supply of a nuclear power plant. The energy accumulating system module comprises a battery array, a converting device and a battery management system, wherein the battery array is formed by connecting a plurality of battery modules in parallel; the converting device is electrically connected with each battery module through a direct-current bus; the battery management system can be used for monitoring and controlling the state of each battery module in real time; each battery module is formed by connecting a plurality of batteries in series or / and in parallel; the converting device comprises a multi-path converting unit, a sampling unit, a plurality of built-in controllers which are connected with the multi-path converting unit respectively, and a central controller which is connected with the sampling unit and the plurality of built-in controllers respectively; and the battery management system consists of a battery state parameter acquiring element, a signal detecting module and a battery module monitor. When an out-plant main power supply, an auxiliary power and an in-plant emergency power supply are lost and an emergency diesel generator cannot be started normally, the energy-accumulating system module can serve as an emergency power supply for maintaining the normal running of important electric equipment in the nuclear power plant.

Description

Technical field [0001] The invention belongs to the field of nuclear power, and relates to a new type of energy-saving system for a million-kilowatt advanced pressurized water reactor nuclear power plant, and in particular to a battery module and a converter device in an energy storage system used in a nuclear power plant emergency system for supplying power to nuclear power equipment . Background technique [0002] A nuclear power plant is a power plant that uses the energy released by the nuclear fission or nuclear fusion reaction to generate electrical energy. In order to protect the health of nuclear power plant workers and residents around nuclear power plants, the design, construction and operation of nuclear power plants adopt the principle of defense-in-depth, providing multiple protections from equipment and measures to ensure that the nuclear power plant can effectively control the output power of the reactor and can In the event of various natural disasters, such as e...

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Problems solved by technology

[0020] The purpose of the present invention is to provide an energy storage system module used in nuclear power plant emergency power supply, which solves the problem that the entire nuclear power plant emergency power supply converter device fails when a certain part of the existing nuclear power plant emergency power converter device fails. Problems of no power supply, limited capacity, and poor shock resistance; at the same time, it solves the problems of reliable stacking, fixing, monitoring and management of a large number of high-capacity single batteries, making it easy to maintain and replace, save space, and facilitate modular expansion. It is beneficial to the heat dissipation of the battery to ensure the service life, and it will not be damaged by loosening or cracking in the event of a high-intensity earthquake, ensuring the normal function of the equipment. When the diesel generator cannot be started normally, the battery pack can quickly and timely provide emergency power to the reactor safety facilities and spent fuel system, and maintain the nuclear power plant in a safe state, thereby preventing serious consequences caused by power failure in an emergency state

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