交流滤波器避雷器电气特性分析中不同仿真模型的影响

交流滤波器是直流输电系统的重要设备。主要分析仿真模型对交流滤波器用避雷器电气特性（过电压、电流和吸收能量）的影响，基于PSCAD电磁仿真程序，开展滤波器投入和交流滤波器母线接地故障下的建模及仿真计算。仿真结果表明：在交流滤波器投入工况下，采用单个滤波器大组模型（模型1）进行仿真时，在运滤波器的避雷器不动作，与实际情况不符；在滤波器投入及滤波器母线接地故障下，完整参数模型（模型3）中各组滤波器用避雷器过电压比原系统模型（模型2）和模型1降低可达21%，电流降低可达53%，但吸收能量升高可达56%。因此，若在绝缘设计中不采用完整参数模型，避雷器电压电流设计值会偏大，能量设计值会偏小，同时会在滤波器投入工况下忽略同大组其他交流滤波器的避雷器动作情况。

Influence of Different Simulation Models for Electrical Characteristic Analysis of the Arrester of AC Filter

AC filter is an important equipment in DC transmission system. This paper mainly analyzes the influence of simulation model on the electrical characteristics (overvoltage, current and absorbed energy) of the arresters for AC filter, and carries out the modeling and simulation calculation for the filter input and AC filter bus grounding fault based on PSCAD electromagnetic simulation program. The simulation result shows that when the AC filter is put into operation and the traditional large group model for a single filter (model 1) was used for simulation, the arresters of the working filters did not act, which is different from the actual situation; under the filter input and filter bus grounding fault, the overvoltage of the arrester of each group of filters in complete parameter model (model 3) was lowered by 21% compared to that in the original system model (model 2) and model 1, and the current was reduced by up to 53%, but the absorbed energy increased by up to 56%. Therefore, if the complete parameter model is not used in the insulation design, the voltage and current design value of the arrester could be too large while the energy design value could be too small. At the same time, the action of the arresters of other AC filters in the same group could be easily ignored when the filter is put into operation.