Simulation of Suppressing High Frequency Fluctuation of Power Output In large Area Power Grid
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 op-eration 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 con-verter 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 oth-er 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 oper-ation stability of large regional power grid,and reduces the negative impact of high-frequency resonance on electrical equipment.
High-frequency fluctuation suppressionLarge regional power gridFlexible DC systemResonance suppression
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