大区域电网电力功率输出高频波动抑制仿真  

Simulation of Suppressing High Frequency Fluctuation of Power Output In large Area Power Grid

作　　者：李瑞 赵金 刘珊 杨姝 LI Rui;ZHAO Jin;LIU Shan;YANG Shu(StateGrid Shanxi Electric Power Research Institute,Taiyuan Shanxi 030001;Xi'an Jiaotong University,Xi'an Shanxi 710049,China)

机构地区：[1]国网山西省电力公司电力科学研究院,山西太原030001 [2]西安交通大学,陕西西安710049

出　　处：《计算机仿真》2024年第9期60-64,共5页Computer Simulation

基　　金：国网山西省电力公司科技项目(52053022000C)。

摘　　要：随着大区域电网技术的快速发展,电力需求的急剧增加,柔性直流系统的应用逐渐普及,导致大区域电网运行的稳定性需求日益提升。为解决当前高频波动抑制算法稳定性低的问题,提出了一种基于索贝尔算法和非线性滤波器相结合的高频波动抑制算法。算法首先对柔性直流系统换流器的等效阻抗进行分析,通过对换流器中不同参数进行分析以量化阻抗影响因素,通过对交流侧等值阻抗进行调整以抑制高频波动;然后通过非线性滤波器过滤其他频率分量,从而消除高频波动。实验结果表明,所提算法使高频波动出现的频率降低了8.41%,有效地提高了电力功率输出的高频波动抑制的效果,提高了大区域电网的运行稳定性,降低了高频谐振对电气设备带来的负面影响。With the rapid development of large regional power grid technology,the demand for power transmission is increasing,the application of flexible DC systems is becoming more and more popular,and the demand for safe operation of large regional power grid is also increasing.In order to solve the problem of low stability of the current high-frequency fluctuation suppression algorithm,this paper proposes a high-frequency fluctuation suppression algorithm based on the Sobel algorithm and nonlinear filter.The algorithm first analyzes the equivalent impedance of the converter in the flexible DC system,quantifies the factors affecting the impedance by analyzing the different parameters in the converter,and adjusts the equivalent impedance at the AC side to suppress high-frequency fluctuations.Then other frequency components are filtered by the nonlinear filter to eliminate high-frequency fluctuations.The experimental results show that the algorithm proposed in this paper reduces the frequency of high-frequency fluctuations by 8.41%,effectively improves the suppression effect of high-frequency fluctuations in power output,improves the operation stability of large regional power grid,and reduces the negative impact of high-frequency resonance on electrical equipment.

关 键 词：高频波动抑制 大区域电网 柔性直流系统 谐振抑制 

分 类 号：TM46[电气工程—电器]