混合直流输电系统控制保护策略分析

Analysis of Strategies for Hybrid High Voltage Direct Current System Control and Protection

作为一种新型直流输电技术,混合直流输电技术综合传统直流和柔性直流的优势。结合常规直流和柔性直流系统控制特性和基于常规直流ABB保护方法,提出了混合直流几种典型故障的控制保护策略,并在仿真平台上建立典型双极混合直流输电系统模型。仿真验证了保护策略的正确性及受端换流站无功控制的有效性。

The hybrid high voltage direct current(HVDC) technology,integrating the advantages of traditional and flexible DC technology,becomes a kind of new DC transmission technology with more attention.Combined with the conventional and flexible DC systems control characteristic and Based on the conventional DC ABB protection method,this paper proposed several kinds of typical faults control protection strategies for hybrid HVDC and built a typical twin pole hybrid HVDC transmission system model.The simulation verifies the correctness of the protection strategies and the validity controlled by the reactive power control of end convertor station.