摘要
云广±800kV特高压直流输电系统额定输送容量巨大,当系统进入孤岛运行方式后,由于整流站靠近云南电网负荷中心且交流系统相对较弱,如果交流或直流系统发生故障,可能会对交直流系统的稳定性造成严重影响。利用实时数值仿真器(RTDS)和实际直流控制保护装置搭建了详细的孤岛运行闭环系统试验模型,研究了云广特高压直流输电系统在孤岛运行方式下的控制特性,探究了交流系统过电压形成的原因,分析了影响系统稳定性的因素,提出了系统孤岛运行的稳定控制措施。
Yunnan-Guangdong ±800kV UHVDC transmission system has large transmission capacity. The rectifier is close to the load cen- ter of Yunnan power system, and AC power system is relatively weak. When the system is in islanded operation, the stability of AC/DC power system could be severely impacted because of unpredictable faults on AC or DC system. In this paper, a detailed real-time digital simulation closed-loop model of islanded operation is built by Real Time Digital Simulator （RTDS） and Control＆Protection cubicles, by which control traits of DC system in islanded operation are studied, reasons causing over-voltage of AC system are probed, factors influencing stability of AC/DC power system are analyzed, and measures of stability control are proposed.
出处
《机电工程技术》
2011年第10期70-74,共5页
Mechanical & Electrical Engineering Technology
关键词
特高压直流
孤岛运行
稳定控制
实时数值仿真
交直流系统
UHVDC
islanded operation
stability control
real-time digital simulation
AC/DC power system
