特高压直流功率回降故障案例仿真

随着特高压直流工程的大规模建设,交直流系统之间的关联性将进一步增强,交直流故障间的相互影响也将日益复杂。以±800 kV复奉直流系统为例,对直流跨区联网系统功率回降事件进行了仿真模拟,在与实际事件对比分析基础上讨论了安控装置动作的影响,并从规划建设、技术应用、运行控制等方面探索了降低直流输电系统故障对交流系统影响的建议和措施。

Case Study and Simulation Research on UHV DC System Power Downhill Fault

With the large-scale construction of UHV DC power transmission projects,the correlation between AC and DC systems will be further enhanced,and the interaction between AC and DC fault will become increasingly complex.In this paper,taking ±800kV DC system from Xiangjiaba to Shanghai for example,the power downhill event occurred in trans-regional DC power network is simulated,and based on the comparative analysis on actual event,during which the security and stability control equipments act or do not act,the influences of action and no action of security and stability control equipments is discussed.From three aspects,i.e.,planning and construction,technology application and operational control,the measures to mitigate the impact of fault occurred in DC power transmission system on AC power transmission system are explored.