一种变电站用复合式低压减载系统

• Format: Patent
• Language: Chinese
• Published: 22.07.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

本发明公开一种变电站用复合式低压减载系统。其包括：(1)、协调控制模块：采集主站中线路模拟量和主变模拟量，判断其线路与主变运行状态及故障情况，判断故障后局部孤网，判断本站中的低压闭锁、解锁，综合判断形成全局低压开放、全局低压闭锁、全局低压允许标志；(2)、就地模块：采集低电压等级执行站中母线电压和负荷模拟量，并判断该站的运行状态及低压闭锁、低压解锁；(3)、通信模块：在各站之间交换运行状态、故障、低压开放、闭锁、解锁与全局低压允许标志信息；(4)、执行模块：综合所有高电压等级输电变电站与低电压等级执行站的信息从而判断并执行低压减载。本发明提高低压减载的可靠性，降低特殊运行工况下误动或拒动概率。 The invention discloses a combined low-voltage load shedding system for a transformer substation. The system comprises a coordination control module which is used for acquiring the line analog quantity and the main transformer analog quantity in a main station, judging the running states and fault conditions of a line and a main transformer, judging a local isolated network after a fault, judginglow-voltage locking and unlocking in the station, and comprehensively judging to form a global low-voltage opening mark, a global low-voltage locking mark and a global low-voltage allowing mark; (2) an on-site module for acquiring the bus voltage and load analog quantity in a low-voltage-level execution station, and judgin