摘要
台风天气对电网的破环力极强,为了减少或消除台风过境时造成的供电中断,需要研究在事前预测、事中响应、事后恢复各个阶段加强电网稳定性的措施。为了确保在台风模式下重点区域电网的供电不中断,提出了一种基于优化低频减载的主动防御策略。该策略在连锁故障发生前优化主动防御断面,对关键断面进行潮流预控,确保故障发生时对重点区域电网冲击最小;在故障发生后通过优化低频减载方案来保障重点区域尽快恢复稳定供电。利用BPA软件对某重点区域电网进行案例仿真,设置3种方案和所提优化方案进行对比,结果表明所提优化方案能够更快地使电网频率恢复稳定。重点区域电网主动防御策略在应对台风引发的多回联络线连锁故障方面具有较为明显的效果,能有效提高电网稳定性。
Typhoon weather has a strong force to break the power grid.In order to reduce or eliminate the interruption of power supply caused by typhoon transit,it is necessary to study measures to strengthen the stability of the power grid at various stages of forecasting beforehand,responding during the event,and recovering after the event.In order to ensure uninterrupted power supply in the key power supply areas under typhoon mode,this paper proposes an active defense strategy based on optimal low-frequency load shedding.This strategy optimizes active defense cross-sections before cascading failures and pre-controls key cross-sections so as to ensure that the impact on the power grid in the key area is minimized when the fault occurs.After the fault occurs,it is able to recover stable power supply in the key areas as soon as possible by optimizing the low-frequency load shedding scheme.The paper uses BPA to make a simulation of a key regional power grid in Zhuhai,and sets three schemes to compare with the proposed optimization scheme.The simulation result shows that the proposed optimization scheme can recover the power grid frequency more quickly.The active defense strategy for the key regional power grids has obvious effect in dealing with the cascading failures of multi-connection tie lines caused by typhoons and is effective in improving stability of the power grid.
作者
甘德树
毛炽祖
GAN deshu;MAO Chizu(Zhuhai Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Zhuhai,Guangdong 519000,China;Maintenance and Test Center of CSG EHV Power Transmission Company,Guangzhou,Guangdong 510663,China)
出处
《广东电力》
2020年第7期92-99,共8页
Guangdong Electric Power
基金
广东电网有限责任公司科技项目(GDKJXM20185859,030400KK52180049)。
关键词
台风
主动防御最佳时机
保底负荷
频率稳定
电压稳定
typhoon
optimal timing of active defense
guaranteed load
frequency stability
voltage stability
