光伏并网逆变器直流侧电压的自抗扰控制改进

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键词：光伏逆变器；直流侧电压；自抗扰；控制策略；总谐波畸变率中图分类号：TM712；TQ035 文献标志码：A 文章编号：1001-5922（2025）10-0179-04

Improvement of auto disturbance rejection control for DC side voltage of photovoltaic grid-connected inverter

LIBohao，YEHaiping，JIAYonglei，LIUJiandong，PUMing，YE Zhancheng， LIShuangde，WANGChanghong，GUZhaojun，HAI Yulian （State Grid Qinghai Provincial Electric Power Company Haidong Power Supply Company， Haidong 81060o，Qinghai China）

Abstract：The powergenerationof photovoltaic inverters iseasilyafected byenvironmental factors such as light intensityand temperature，resulting inalarge disturbance onthe DC sidevoltage.Inthis regard，this paper proposes a DC-side voltage control strategy based on first-order improved linear active disturbance rejection control （LADRC）. In this paper，the LCL photovoltaic inverter grid-connected system is modeled firstly，and then the improved LADRC controlleris designed and its performance is further analyzed.Finally，through MATLAB simulationsoftware，the control strategyproposed in this paper is compared with the traditional LADRC control strategy under two different working conditions.The simulationresults show thatthe control strategy proposed inthis paper is superior to the traditional LADRCcontrol strategyinterms ofovershoot，and the total harmonic distortion（THD）of thecurrent is less than 5% under the control strategy，which verifies the effectiveness and adaptability of the strategy，and has certain reference value in engineering practice.

Key Words： photovoltaic inverter;DC side voltage;self disturbance rejection;control strategy;THD

光伏发电输出功率具有明显的波动性和随机性，使电力系统的稳定面临诸多挑战13。（剩余4653字）