On-line Monitoring Technique And Application Of Valve Control Storage Battery In Lanzhou Xigu Thermal Power Plant

Source system of direct current operation is current supply source of some important loads as relaying setting, signal setting, automatic setting, lighting setting, circuit breaker in electrical power system, whose reliability of current supply directly affects safe operation in transformer station. Storage battery is emergency power supply of DC operation electrical source system in electrical power system, whose good work state, is great important to operation of fixture. Because individual storage battery quickly abates due to dry, heat, polar plate lithification, weeping, lack charging, excessive discharging, internal resistance increasing, capability reduction, explosion etc., heavy accident of electric network impossible occur. To warrant reliability of DC operation power electrical supply, all-round monitoring to parameter of storage battery operation is necessary.This article has analyzed the on-line monitoring necessity of storage battery and technical parameter affecting the storage battery wok state with method of storage battery monitoring in possession, and studied the method of on-line monitoring in valve control storage battery, the main content of studies include:(1) The study of technique parameter and relation in valve control storage battery ;(2) The study of real-time monitoring method about valve control storage battery's voltage and charge or discharge current;(3) The study of on-line monitoring principle method about valve control storage battery's internal resistance,basic design of system is finished;(4) Through analyze of application of part system in Lanzhou Xigu thermal power plant, active effects the on-line monitoring technique of storage battery to maintenance of storage battery.