混合直流输电及其物模试验

Hybrid HVDC and Its Physical Model Simulation

基于晶闸管的常规电网换相直流输电(LCC-HVDC)系统损耗小、可靠性高、技术成熟,电压源型换流器直流输电(VSC-HVDC)滤波容量小、控制灵活且可向无源网络送电,而混合直流输电兼具LCC-HVDC和VSC-HVDC的优点。对其运行方式、控制策略、协调控制进行了研究,并构建混合直流输电物模试验系统进行了验证。

Conventional line commutated converter high voltage direct current（LCC-HVDC） system based on thyristors has the advantages of high rated power, reliability and low cost.The voltage source converter（VSC）-HVDC system has the advantages to feed AC power system with low short circuit power or even passive net works with no local power generation.The hybrid HVDC system composes the advantages of LCC-HVDC and VSC-HVDC is investigated.The operation mode, control strategy and coordinated control of hybrid HVDC system are studied and tested on physical model simulation of the hybrid HVDC.