CAJ | 학술논문

对交直流混合电力系统进行准确建模非常重要。直流输电线路的电阻会随温度、输送功率的不同而变化。由于没有电抗参数，直流线路电阻的变化可能会对交直流混合电力系统的分析计算产生明显影响，因此在交直流混合系统中，需要将直流线路的电阻参数作为时变参数处理。利用交叉熵理论排除异常点影响的能力，提出了直流线路电阻的时变程度评估与实时值估计方法，并基于所提的方法，开发了实用化的应用软件在南方电网这一交直流混合电力系统应用。
대교직류혼합전력계통진행준학건모비상중요。직류수전선로적전조회수온도、수송공솔적불동이변화。유우몰유전항삼수，직류선로전조적변화가능회대교직류혼합전력계통적분석계산산생명현영향，인차재교직류혼합계통중，수요장직류선로적전조삼수작위시변삼수처리。이용교차적이론배제이상점영향적능력，제출료직류선로전조적시변정도평고여실시치고계방법，병기우소제적방법，개발료실용화적응용연건재남방전망저일교직류혼합전력계통응용。
It is very important to build an accurate model for AC-DC hybrid power system. The resistances of HVDC transmission lines will vary with the variation of temperature and transmitted power. Since there is no reactance parameter, the resistance variation of HVDC transmission line may lead to obvious affect on analysis and calculation of AC-DC hybrid power system, thus for AC-DC hybrid power system it is necessary to regard the resistance parameters of HVDC transmission line as time-varying parameters. Leading in the concept of correntropy, the affects of gross errors are excluded, and the time-variability evaluation and real-time estimation methods for HVDC line resistances are proposed consequently. Based on the proposed method, a practicable application software is developed and actually applied in China Southern Grid, which is an AC-DC hybrid power system.