基于双小波变换的负载电流微分干扰补偿仿真

Simulation of Load Current Differential Interference Compensation Based on Double Wavelet Transform

电力系统的负载电流极易受到外界干扰信号的影响,导致负载电流的不稳定输出,为此提出基于双小波变换的负载电流微分干扰补偿法。利用双小波变换技术实时跟踪检测负载电流的输出情况,判断负载电流是否处于平稳状态。通过分析电流微分干扰,确定负载电流不稳定的原因。搭建负载电流干扰补偿方程,求解补偿系数与电流偏移量,并安装负载电流干扰补偿控制器,分别从总量、分量和残量三个方面实现对负载电流的直接补偿。通过仿真得出结论,与传统补偿方法相比,基于双小波变换的负载电流微分干扰补偿方法的补偿速度提升了50%,极大程度上减少了外界信号干扰的影响,保证了电流的稳定输出。在实际应用中,提高了电力系统的运行效能和稳定性。

The load current of power system is often influenced by external interference signal leading to unstable output of load current. Therefore, a method of load current differential interference compensation based on double wavelet transform was put forward. Firstly, double wavelet transform was used to track and detect the output of load current in real time, so as to judge whether the load current was stable. By analyzing current differential interference, the reason of instability was determined. Then, the compensation equation of load current interference was constructed to calculate the compensation coefficient and current offset. Meanwhile, the compensation controller of load current interference was installed to directly compensate the load current from three aspects of total, component and residual. In conclusion, the compensation speed of proposed method is 50% higher than that of traditional compensation method, which greatly reduces the influence of external signal interference and ensures the stable output of current. In practical application, the operation efficiency and stability of power system are improved.