基于动态相量法的直流系统暂态响应实时快速仿真计算方法

Real-time Rapid Simulation Method for Transient Response of LCC-HVDC Based on Dynamic Phasor Method

为解决交流系统大扰动下电流源型直流输电(line commutate converter based HVDC,LCC-HVDC)系统电磁暂态精度响应实时求取困难的问题,该文基于动态相量法仿真框架,详细讨论了大扰动下LCC-HVDC直流输电系统的建模方案,并针对工程现场的计算精度与计算复杂度要求和逆变侧容易发生的换相失败现象,重构了易于拓展的仿真模型计算框架。多故障场景的仿真对比实验表明,与传统的动态相量仿真方案相比,所提出的框架能够准确反映直流系统在逆变侧交流系统受扰下的暂态响应特征,同时提高了计算速度,实现了LCC-HVDC系统暂态响应的高精度、实时化计算。

In order to solve the problem of real-time calculation of electromagnetic transient response of line commutate converter based HVDC(LCC-HVDC) system with high accuracy under large disturbance, the modeling method of LCC-HVDC transmission system was discussed in detail based on dynamic phasor method. Aiming at the requirement of calculation accuracy and complexity in engineering field, with the common commutation failure phenomenon at the inverter side under consideration, an easy-to-expand simulation model calculation framework was reconstructed. Multi-scene simulation experiments indicated that compared with the traditional dynamic phasor simulation scheme, the proposed framework can accurately reflect the transient response characteristics of the LCC-HVDC system under large disturbance of the AC system at the inverter side, while improving the calculation speed, and realizing the real-time calculation of the transient response of the LCC-HVDC system with high accuracy.