基于实时数字仿真器的云广特高压直流系统孤岛运行仿真  

Simulation Study on Islanded Operation of Yunnan-Guangdong UHVDC Power System Based on Real-time Digital Simulator

作　　者：夏健全[1] 杨迪[1] 封磊 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]西安高压电器研究院,陕西西安710077

出　　处：《广东电力》2010年第10期29-35,共7页Guangdong Electric Power

摘　　要：云广特高压直流系统输送功率大,送端换流站远离电站而且靠近云南电网昆明负荷中心,交流系统相对较弱,特高压直流系统在失去与云南主网相连的全部500kV联络线后,系统将进入孤岛运行方式。为此,采用实时数字仿真器和特高压直流保护控制软件搭建了详细的实时闭环仿真系统模型,对云广特高压直流系统进入孤岛运行过程进行仿真分析,研究云广直流系统进入孤岛方式运行交直流系统的暂态稳定性能,并对交流系统和直流系统故障过程进行了仿真,分析系统故障后交流系统电压和频率的暂态特性以及交直流控制系统的动态性能。通过仿真验证了云广特高压直流在孤岛运行方式下,系统仍具有良好的动态性能,对实际的工程具有重要指导意义。Yunnan-Guangdong UHVDC system has a large transmission power,and the AC power system of sending-side is relatively weak as the converter station is far away from power stations and close to the load center of Kunming,China.While losing all 500 kV contact lines between UHVDC system and Yunnan main network,the system will enter the islanded operation mode.Therefore,a detailed real-time closed-loop UHVDC simulation system model is built by using real-time digital simulator（RTDS） and the UHVDC control-protection software,by which the simulation of entering the islanded operation is carried out and the transient stability performance of AC/DC systems is analyzed during the islanded operation of Yunnan-Guangdong UHVDC system.The fault process of AC/DC systems is also simulated,thereby analyzing the transient properties of voltage and frequency during the fault of AC system as well as the dynamic performance of AC/DC control systems.The simulation results show that the UHVDC power system still has a good dynamic performance under islanded operation mode,which has useful value in practical project.

关 键 词：特高压直流系统 孤岛运行 实时数字仿真器 暂态特性 仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM743