摘要
高补偿度串补在电网中具有应用前景,既能充分发挥交流通道输电能力,还对电源开发进度的不确定性具有较强的适应性。从系统无功平衡及电压分布的角度,论证高补偿度串补在特高压电网中应用的可行性。以"蒙西外送"特高压工程为分析实例,结果表明,变电站无功补偿容量并未成为制约串补度提高的主要因素,但沿线最高电压会成为制约串补度提高的重要因素,此时采用串补分散布置较之集中布置方案更有利于抑制工频稳态过电压。
Series capacitors of high-degree compensation possess application prospect in power system, which can reinforce transmission capacity of AC lines and are strongly adaptive to the uncertainty in power source development plan. From the aspect of reactive power balance and voltage distribution, the feasibility of series capacitors of high-degree compensation in UHV power system is proposed, which is illustrated on the “Mengxi Waisong” UHV project. Results show that reactive power compensation capacity of substation has not been the main limiting factor of high-degree compensation. However, maximum voltage along the UHV transmission line has been an important restricting factor. In order to suppress the fundamental frequency steady overvoltage, distributed disposition of series capacitors on both sides is better than the centralized disposition scheme.
出处
《智能电网》
2015年第4期288-292,共5页
Smart Grid
基金
国家电网公司科技项目(XT71-12-025)~~
关键词
特高压电网
高补偿度串补
无功平衡
电压分布
UHV power grid
series capacitors of high-degree compensation
reactive power balance
voltage distribution
