基于调度主站策略的稳控远方闭锁备自投研究

Research on Stability Control Remote Blocking Automatic Bus Transfer Based on Master Station Strategy

特高压直流输电系统建设初期,大受端电网需配套部署大型稳控切负荷系统。为保证极端情况下可切负荷量,常采取退出负荷终端站备自投装置或紧急情况下闭锁备自投的方法,将极大地降低相关站点的供电可靠性。本文针对大电网稳控策略下备自投需退出或闭锁问题,通过研究稳控系统和备自投装置特点,提出基于调度主站策略的远方闭锁备自投方案,并研制了基于调度主站能量管理系统(Energy Management System,EMS)的备自投逻辑控制功能模块,实现稳控系统动作后调度主站远方批量闭锁负荷终端站备自投总功能压板,确保电网供电可靠性与安全性协同。通过长沙电网实际电网测试,结果显示该方法能可靠闭锁负荷终端站备自投,响应时间满足要求。

In the initial stage of HVDC construction, the large receiving end power grid needs to be equipped with large scale stable control load shedding system. In order to ensure the load can be cut off in extreme cases, the method of withdrawing the automatic bus transfer equipment of the terminal station or blocking automatic bus transfer in emergency will greatly reduce the power supply reliability of the stations concerned. Aiming at the problem of exiting or blocking automatic bus transfer equipment under large power network stability control strategy, this paper presents a remote blocking scheme of automatic bus transfer based on dispatching master station strategy by studying the characteristics of reserve automatic switch-in system and reserve automatic switch-in device. A logic control module based on the energy management system(EMS) is developed to realize the total function platen of load terminal substation remote batch blocking automatic bus transfer in dispatch master after the operation of the control system to ensure power supply reliability and safety coordination. The test results of Changsha power grid show that the method can reliably block automatic bus transfer, and the response time meets the requirements.