s&t innovation capability evaluation. journal of national university of defensetechnology, 2008, 30...经济经纬, 2016, 33(4): 133138.li yichao, liao zhiling, du yicheng. local government credit risk assessment
与双端直流输电系统相比,基于电压源型换流器(voltage-sourced converter,vsc)的柔性直流电网虽然具有更高的输电灵活性和供电可靠性,但是它需要通过直流断路器来实现故障的隔离和清除...protection of transmission line based on equivalent travelling wave.ieee transactions on power delivery