摘要
高压直流输电系统包含了各种分层控制方式,具有高度的可控性,其目的在于向系统提供高效稳定的运行。主要对分层控制中极控制层的控制器原理进行研究,并理论分析了整流侧定电流与定最小触发角控制器和逆变侧定关断角与定电流控制器从系统发生故障直至故障后系统再次恢复到稳态时的相关动作特性。在此基础上,基于PSCAD/EMTDC的仿真程序研究了CIGRE直流输电标准测试系统在有扰动的情况下系统恢复到稳态时运行点的变化以及恢复过程中相应控制模式的转换。结果证明,故障时极控制器能迅速作出反应,并能根据所处的工况自行切换控制模式,以满足系统的要求。
The hierarchical control is normally used in HVDC transmission systems to ensure its efficient and stable operation. The principle of polar-controller is analyzed and the corresponding action characteristics of the constant DC current ＆ minimum firing angle controllers at rectifier side and the constant shutting angle DC current controllers at inverter side are theoretically studied from system fault occurrence till total system recovery. Based on this, the alteration of operating points and the conversion of control models during HVDC transmission system recovery from destabilization to steady state are analyzed thoroughly by using PSCAD/EMTDC. It reveals that, the polar-controller can swiftly respond to the fault and automatically switch over its control mode according to different working conditions to meet the requirements of system.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第1期65-69,共5页
Electric Power Automation Equipment
