CAJ | 학술논문

本文针对小型光伏并网装置，提出了一种新的控制策略。对单相太阳能光伏并网系统的工作原理进行了分析，建立了光伏并网系统的数学模型，由于锁相环技术可以使逆变器输出的电流与电网电压基本同频同相，电网电压前馈可以抵消电网对光伏并网系统的影响，从而提出了基于锁相环技术和电压前馈控制相结合的复合控制策略。在Matlab/Simulink环境下建立了系统仿真模型，并分别采取了不同的控制策略进行仿真。结果表明，文中提出的控制策略可以使光伏并网系统输出更好的并网电流波形，降低总谐波畸变率。
본문침대소형광복병망장치，제출료일충신적공제책략。대단상태양능광복병망계통적공작원리진행료분석，건립료광복병망계통적수학모형，유우쇄상배기술가이사역변기수출적전류여전망전압기본동빈동상，전망전압전궤가이저소전망대광복병망계통적영향，종이제출료기우쇄상배기술화전압전궤공제상결합적복합공제책략。재Matlab/Simulink배경하건립료계통방진모형，병분별채취료불동적공제책략진행방진。결과표명，문중제출적공제책략가이사광복병망계통수출경호적병망전류파형，강저총해파기변솔。
A kind of new control strategy, which contraposed small photovoltaic grid-connected system, is proposed. The op-erating principle of the system of signal-phase grid-connected photovoltaic power is analyzed, and the mathematical model of photovoltaic grid-connected system is established. Because of PLL technique could make the inverter output current and utili-ty-grid voltage with the same frequency and phase, and the influence of grid on photovoltaic grid-connected system could be counteracted with the feed-forward control of utility-grid voltage, the compound control strategy, which based on the combina-tion of phase-locked loop (PLL) technique and feed-forward control of voltage, is put forward. The power output stage model of system is established under Matlab/Simulink, and different control strategies are compared. The results prove that the wave-form of grid-connected current output from photovoltaic grid-connected system can be improved by the control strategy pro-posed in this paper and the THD is reduced.