摘要
海浪发电系统中的电网为海岛孤网,电网负载多为非线性负载且负载经常变化,会产生多次谐波污染电网并引起电网不平衡。传统有源电力滤波器进行谐波处理只能对电网负载谐波源引起的谐波进行处理,忽略了模型器件本身和计算误差引起的谐波,谐波治理效果差。在传统的有源滤波的基础上,基于瞬时无功功率理论和模糊控制理论,采用了模糊控制策略和谐波载波的方式,加入了谐波误差控制环节,能更好地消除谐波,并用Matlab进行仿真,仿真结果验证了方案的正确性和可行性。
Power grid is island isolated net in wave power system, and power grid load is nonlinear loads and changed frequently, which can produce multiple grid harmonic pollution and lead to an imbalance of power grid. The harmonic treatment effect of traditional active power filter is bad, because the traditional active power fiher could govern harmonic caused by power grid load harmonic source but ignore harmonics that caused by device itself and model calculation error. On the basis of the traditional active filter, and based on the instantaneous reactive power theory and fuzzy control theory, then fuzzy control strategy and harmonic carrier way were used, and joined the harmonic error control link, which could better eliminate harmonics. Using Matlab simulation, the simulation results verify the correctness and feasibility of the scheme.
出处
《电气传动》
北大核心
2016年第4期46-49,共4页
Electric Drive
关键词
海浪发电
非线性负载
谐波载波
模糊控制
谐波治理
wave power generation
nonlinear load
harmonic carrier
fuzzy control
harmonic governance
