基于安全自动装置控制的火电机组改进超速保护

为解决传统的火电机组超速保护控制特性无法适应不同形态故障对电网、机组的影响,完善其控制策略,加强电网稳定性、提高机组设备安全性,提出一种基于安全自动装置控制的火电机组超速保护。该保护利用区域稳控系统实现信息采集、处理和命令分发,实现了安全自动装置与超速保护两者的精确配合,可达到防止同一供电区域内的多台火电机组超速保护同时动作的目的。分析结果表明,该保护在有效提高电网稳定性的同时,也确保了机组原有的安全屏障不受削弱,可操作性强,为解决孤网系统高频问题另辟蹊径。

Improved OPC by automatic-security device

In order to solve the problem that traditional thermal power unit over-speed protection control characteristics can not adapt to different forms of fault on the grid or the unit, and to improve the control strategy, strengthen the power grid stability, enhance security unit, this paper presents an improved over-speed protection of thermal power unit based on the control of automatic safety device. By collecting information, processing and distributing the commands through the regional stability control system, this new protection realizes the combination of automatic safety device and over-speed protection, which can achieve the purpose to prevent the simultaneous act of over-speed protection units within the same region. Analysis indicates that the new protection with strong operability not only ensures the original unit safety barrier from being weakened but also improves power system stability, which provide a new way to solve the problem of a high-frequency isolated network system.