含多回物理直流仿真装置的大电网数模混合仿真建模及研究

为了对特高压交直流复杂电网进行仿真研究,采用基于输电线贝瑞隆模型的功率连接接口技术,连接全数字实时仿真装置HYPERSIM和高压物理直流仿真装置,建立了相应的数模混合仿真系统平台。仿真试验基于2015水平年特高压规划电网,以华东直流多落点地区为研究对象,搭建了包含16回直流输电系统的模型,其中2回为物理直流仿真装置的大规模数模混合仿真试验模型。试验结果表明,华东直流多落点地区发生的交流系统短路故障,会引起多回落点华东直流发生换相失败,但不会发生连续的换相失败并进而闭锁,系统能够保持稳定。仿真结果表明物理直流仿真装置对数字侧故障响应正确,验证了数模混合仿真研究的有效性。

Modeling and Study of Digital/Analog Hybrid Simulation for Bulk Grid With Multi-analog HVDC Simulators

To simulate and study the complicated ultra-high voltage(UHV)-AC/DC grid,the power connection technology based on Bergeron transmission line model was introduced,and the corresponding digital/analog hybrid simulation platform was established by linking full-digital simulator HYPERSIM and analog HVDC simulator.Based on the UHV power grid program in the target year of 2015,the hybrid simulation model for the East-China grid was established.There are 16 HVDC links in the model and two of them were in analog HVDC simulation.The simulation results show that the short-circuit faults occurring in AC system of East-China grid will result in commutation failures in many HVDC links in East-China grid,but they are not continuous commutation failure and therefore do not block;and the whole power system will keep stable.The simulation results show that the analog HVDC simulators have correct response to the fault at digital side,so the efficiency of the hybrid simulation is validated.