船舶光伏逆变器LCL滤波电路结构设计与参数优化方法

本文针对光伏发电系统与柴油发电机组构成的混合动力船舶,研究其电力系统结构及光伏逆变器PQ控制策略；针对光伏逆变器中LCL滤波器固有的谐振尖峰、及传统滤波电容串电阻降低高频谐波抑制能力的问题,提出了网侧电感并联L-R的无源阻尼LCL电路结构,并通过所该电路结构数学模型进行了频率特性与谐波抑制能力研究,揭示了其优良的高频谐波抑制特性,并获得该电路结构的参数优化方法。仿真结果表明,所提出的电路结构及参数优化方法在大为降低谐振峰值的同时,提高了对高频谐波的抑制能力。所提出的电路结构及参数优化方法在船舶光伏逆变器的应用领域具有广泛应用前景。

Study on Structural Design and Parameter Optimization of LCL Filter for Ship PV Inverter

In this paper, the power system structure and PQ control strategy for photovoltaic inverters are studied for hybrid ships consisting of photovoltaic power generation systems and diesel generator sets; the inherent resonant peaks of LCL filters in photovoltaic inverters, and the traditional filter capacitor string resistance are reduced. For the problem of high-frequency harmonic suppression capability, a passively damped LCL circuit structure with parallel inductance LR is proposed, and the frequency characteristics and harmonic suppression capability are studied through the mathematical model of the circuit structure, and its parameter optimization method is obtained. The simulation results show that the proposed circuit structure and parameter optimization method greatly reduce the resonance peak and improve the suppression of high-frequency harmonics. The proposed circuit structure and parameter optimization method have wide application prospects in the field of application of marine photovoltaic inverters.