基于网压预测的电容式电压互感器谐振抑制方法研究

Research on Resonance Suppression Method of Capacitor Voltage Transformer Based on Grid Voltage Prediction

电容式电压互感器在电压波动时容易产生谐振,导致电压输出不稳定。因此,提出基于网压预测的电容式电压互感器谐振抑制方法。首先,构建静态电压稳定分岔点标定模型,采用多元参数约束方法构建约束指标参数体系,进行谐振参数分析。其次,构建网压预测模型,确定电容式电压互感器的静态电压稳定极限,根据对谐振参数逼近平衡最优解的分析,实现对谐振抑制的参数解算与优化。最后,根据网压预测结果,实现谐振抑制输出。实验结果表明,采用该方法进行谐振抑制时,互感器的输出稳定性及输出增益效果较好,提高了静态电压的安全性。

Capacitive voltage transformers are prone to resonance when the voltage fluctuates,resulting in unstable voltage output.Therefore,a method for suppressing resonance of capacitive voltage transformer based on grid voltage prediction is proposed.The static voltage stability bifurcation point calibration model is constructed,the multi-parameter constraint method is used to construct the constraint index parameter system,and the resonance parameter analysis is performed.Then a network voltage prediction model is constructed to determine the static voltage stability limit of the capacitive voltage transformer,and realize the parameter calculation and optimization of the resonance suppression based on the analysis of the resonance parameters approaching the optimal solution.According to the prediction result of the grid voltage,the resonance suppression output is realized.The experimental results show that when the method is used for resonance suppression,the output stability of the transformer is better,the output gain effect is better,and the safety of the static voltage is improved.