快关汽门与励磁的协调控制增强发电机组暂态稳定

Enhancing Transient Stability of Generators by Coordinated Control of Fast Valves and Excitation

某些严重的电力系统故障 ,例如在电厂附近发生的短路故障 ,会导致整个系统暂态稳定的丧失。为此经常切除部分机组来防止非同步运行 ,但是这种增强暂态稳定的方法将干扰整个系统的功率平衡 ,并且需要经过很长的调整时间才能建立起新的稳态运行状态。本文介绍了一种避免切机的新方法 ,通过协调快关汽门和励磁控制来实现发电机组的稳定运行。仿真计算表明 ,经过1到2个非同步周期就可以建立新的稳定状态。

Some severe fault like short-circuits occurring near power station can result in system instability.In order to prevent asynchronous operation of the system some generators is often tripped.But this method enhancing transient stability may disturb the power balance in the system and start a long-term dynamic regulation process.This paper proposes a new control method,which can stabilize generators and system by coordinating of fast valves and excitation system,instead of generator tripping.Simulation results show that stabilization can be achieved after one or two asynchronous rotations.