电力系统相控开关技术及其智能控制策略

Phase-controlled Switching Technology in Power Systems and Its Intelligent Control Strategy

相控开关技术是有效抑制电力系统操作过电压和涌流以及全面提高电能质量的关键技术。介绍了电力系统相控开关技术的最新进展和急需的关键问题。研究了参考电压或电流过零点的检测方法 ,通过仿真分析了采样频率、背景噪声、谐波分量和瞬态脉冲干扰对检测准确度的影响 ,并设计了相应的数字低通滤波器。提出了基于人工神经网络和快速驱动技术的智能控制策略 ,有待更深入研究和应用。

As an effective technology,phase-controlled switching can be utilised to minimise the switching overvoltages and high inrush currents in power systems,as well as to improve the voerall power quality,The state-of the art of phase controlled switching technology was briefly reviewed and some pending key issues associated with it were raised.The zero crossing point detection algorithms for reference voltage or current were investigated,and the impacts on detection accuracy caused by sampling frequency,background noise,harmonics and impulse interference were analysed through computer simulations and addressed by a low-pass digital filter.Based on artificial neural network and fast driving technology,an intelligent control strategy was proposed which needs to be verified by further investigations and application.