糯扎渡直流协调控制系统设计及效果

为了保证糯扎渡直流工程投产后南方电网能稳定地运行,采用特征值分析方法研究了南方电网动态稳定性,显示2013—2015年间南方电网主要存在云南—广东,云南、广东—贵州,海南—广东3种区域间低频振荡模式。计算和分析了糯扎渡直流协调控制系统的控制器参数、控制模式以及阻尼控制效果,指出针对云南—广东振荡模式所设计的糯扎渡直流协调控制系统对系统阻尼的控制效果较好,但在贵广Ⅰ、贵广Ⅱ和云广直流控制系统正常投运情况下,该直流控制系统对系统阻尼并没有明显的控制效果。

The Design and Effect of Coordinated Control System for Nuozhadu DC Project

To ensure China Souther Power Grid（CSG） being stable after the Nuozhadu DC project works with the system,eigenvalue analysis method is used in this paper to research the dynamic stability of CSG.The result indicates that there are mainly three inter-area oscillation modes in CSG during 2013-2015,namely the Yunnan-Guangdong mode,Yunnan/Guangdong-Guizhou mode and Hainan-Guangdong mode.The paper calculates and analyzes the control unit’s parametres,control modes and damping control effect of the coordinated control system for Nuozhadu HVDC project,pointing out that the control system designed for being against Yunnan-Guangdong oscillation mode has a better effect in damping control,but this effect almost becomes zero while the control systems of Guizhou-GuangdongⅠ,Guizhou-GuangdongⅡand Yunnan-Guangdong DC projects are operating normally.