特高压交流试验示范工程无功电压控制策略研究

长治—南阳—荆门特高压交流试验示范工程投产后，特高压联络线无功电压控制策略较常规电压等级线路呈现新的特点，需兼顾特高压线路绝缘水平和电网安全稳定约束2个方面的要求。揭示了特高压系统电压变化的原因，分析了特高压与500 kV系统无功电压特性差异，采取仿真计算和实测曲线验证了理论分析结果，提出了特高压联络线电压控制措施，取得的成果已应用于特高压交流试验示范工程，并为今后特高压工程的无功电压运行控制提供依据。

Research on Reactive Power and Voltage Control Strategies forthe UHV AC Demonstration Project

After the UHV AC demonstration project was put into operation, the UHV tie line presents new characteristics in reactive power and voltage control. When reactive power and voltage control strategies are made, insulation levels of UHV lines, security and stability of power grids should be considered at the same time. This paper reveals the reasons of voltage fluctuations in the UHV system, analyzes the differences in characteristics of reactive power and voltage between the UHV system and 500 kV system, verifies the results derived from the analysis with simulation and practical curves, and proposes voltage control strategies for the UHV tie line. The achievements obtained have already been applied in the UHV AC Demonstration project and can be used as basis for reactive power and voltage control in the future UHV projects.