Xu Yi, Zou ErYong, Tang FengPing
Jiaxing Nanyang Polytechnic Institute, Jiaxing, Zhejiang 314000, China.
Key Laboratory of Control of Power Transmission and Conversion (SJTU), Ministry of Education, Shanghai 200240, China.
Comput Intell Neurosci. 2022 May 31;2022:7240834. doi: 10.1155/2022/7240834. eCollection 2022.
Aiming at the problem that the loss distribution balance control effect of high-power photovoltaic grid-connected inverter is poor due to the complex loss factors, this paper proposes a loss distribution analysis and balance intelligent control method for high-power photovoltaic grid-connected inverter. The topology structure of high-power photovoltaic grid-connected inverter is constructed and the overall control scheme is designed. The loss of inductance, resonant frequency, harmonic attenuation, and damping resistance in the circuit of PV grid-connected inverter is analyzed, respectively. On this basis, a two-stage loss control model of high-power PV grid-connected inverter is constructed, and the generalized linear decision rule is adopted to schedule PV power supply and fluctuating load. A two-stage loss control model for high-power photovoltaic grid-connected inverter was established and the optimal loss control value was obtained. Experimental results show that the proposed method can accurately suppress voltage and current losses of grid-connected photovoltaic inverters and has strong resonance resistance and robustness.
针对高功率光伏并网逆变器由于损耗因素复杂导致损耗分布平衡控制效果不佳的问题，提出一种高功率光伏并网逆变器损耗分布分析与平衡智能控制方法。构建了高功率光伏并网逆变器的拓扑结构并设计了整体控制方案。分别分析了光伏并网逆变器电路中的电感损耗、谐振频率、谐波衰减和阻尼电阻。在此基础上，构建了高功率光伏并网逆变器的两级损耗控制模型，并采用广义线性决策规则调度光伏电源和波动负载。建立了高功率光伏并网逆变器的两级损耗控制模型并获得了最优损耗控制值。实验结果表明，所提方法能够精确抑制并网光伏逆变器的电压和电流损耗，具有较强的抗谐振能力和鲁棒性。
