In the trend of energy-saving emission reduction, people began to explore the development of new energy as an auxiliary power into the ship's power grid. Ship power grid is a limited power system, the higher the harmonic content of the grid .The grid-connected interface is the inverter. The pulse width modulation (PWM) technology makes the grid-connec-ted inverter generate high-frequency harmonic current into the ship's power grid which will easily lead to ship power gridin-stability. There is a need to add in the inverter back-end to filter out high-frequency harmonics LCL-type filter, The design of LCL filter parameter of traditional grid-connected inverter on land is very difficult to meet the requirements of grid-connec-ted inverter. In view of this, genetic algorithm is used to optimize the parameters of the LCL filter on the ship's power grid side, and the optimal solution of the LCL filter is considered synthetically. The optimal solution is obtained by considering the constraints of the ship LCL filter. The simulation results show that the filter with parameters optimized by genetical-gorithm has good network side harmonic suppression ability, which provides theory support for the Ship new energy grid connection.%在节能减排的趋势下,人们开始探求开发新能源作为辅助动力并入船舶电网.船舶电网是一个有限电源系统,电网谐波含量较高.新能源并网接口是逆变器,采用的脉冲宽度调制(PWM)技术使并网逆变器产生高频谐波电流注入船舶电网,容易造成船舶电网不稳定.需在逆变器后端加上能够滤除高频谐波的LCL型滤波器,而陆地上传统的并网逆变器LCL滤波器参数设计的试凑法很难满足船舶新能源逆变并网要求.鉴于此采用遗传算法对船舶电网侧LCL滤波器各参数优化设计的方法,综合考虑船舶电网LCL型滤波器的约束条件选择出最优解.仿真结果表明,采用遗传算法优化参数的滤波器对逆变器输出谐波进行有效抑制,为船舶新能源并网提供理论支撑.
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