一种考虑动态条件的独立发电系统自适应混合步长归一化最小均方四阶控制方法

In this work, an adaptive mixed-step size normalized least means fourth (MSSNLMF) approach for a voltage source converter (VSC) is employed to regulate the voltage and frequency in the stand-alone power generation system. Moreover, this control also compensates load reactive power, suppresses load harmonics in supply system, and neutralizes the effects of load unbalance on supply terminals. Furthermore, the proposed VSC control provides a faster dynamic response, less steady-state error, and improves stability during fundamental weight component extraction under intermittent conditions. This stand-alone system consists of a solar photovoltaic (SPV) array, a wind turbine-powered self-excited induction generator (SEIG), and battery energy storage (BES). Conventional battery control employs a proportional-integral control technique, which can lead to stability issues. Thus, in the proposed study, a bidirectional dc-dc converter (BDC) control mechanism is employed, which improves stability and simplifies controller design. The experimental result findings on a laboratory prototype have validated the developed control method for VSC. It is evident that the power quality (PQ) of the proposed system is also improved during changes in wind speed, solar insolation, and dynamics in nonlinear load. Moreover, the proposed control settles within 19 ms, meeting the 2% limit, whereas the existing algorithms exhibit fluctuations exceeding 5% during load perturbation.