CAJ | 학술논문

在不规则阴影影响下，光伏阵列输出特性曲线存在多个局部最大功率点，传统最大功率点跟踪算法在此情况下难以找到全局的最大功率点，从而陷入局部最优值。为解决该问题，根据滑模变结构控制在非线性系统控制中具有响应速度快、鲁棒性强等优点和扰动观察法具有算法简洁、跟踪效率高的特点，提出了将滑模变结构控制和扰动观察法相结合的算法，将其应用到不规则阴影影响下光伏阵列的最大功率跟踪控制中，用于解决局部遮阴下多峰寻优的问题。为了验证该算法的有效性，建立了不规则阴影影响下光伏阵列的实验电路。通过与传统扰动观察法的比较，实验结果表明：在光伏阵列被部分遮蔽的情况下，该算法可以快速跟踪到全局最大功率点，使系统稳定地工作在最大功率点附近，减小输出功率的波动，从而有效地利用太阳能。
재불규칙음영영향하，광복진렬수출특성곡선존재다개국부최대공솔점，전통최대공솔점근종산법재차정황하난이조도전국적최대공솔점，종이함입국부최우치。위해결해문제，근거활모변결구공제재비선성계통공제중구유향응속도쾌、로봉성강등우점화우동관찰법구유산법간길、근종효솔고적특점，제출료장활모변결구공제화우동관찰법상결합적산법，장기응용도불규칙음영영향하광복진렬적최대공솔근종공제중，용우해결국부차음하다봉심우적문제。위료험증해산법적유효성，건립료불규칙음영영향하광복진렬적실험전로。통과여전통우동관찰법적비교，실험결과표명：재광복진렬피부분차폐적정황하，해산법가이쾌속근종도전국최대공솔점，사계통은정지공작재최대공솔점부근，감소수출공솔적파동，종이유효지이용태양능。
The photovoltaic (PV) array output characteristic curve in nonuniform shadow conditions has multi-local maximum power points.In this case,it is hard for a traditional maximum power point tracking (MPPT) method to find the global maximum power point but fall into the local maximum power point.To address this drawback,by virtue of the fast response, good robustness in nonlinear system control of sliding mode variable structure control(SMVSC)and the succinctness and high tracking efficiency of perturbation and observation(P&O) method,an algorithm that combines SMVSC and P&O method is proposed.It is used in PV array MPPT control in nonuniform shadow conditions to solve the problem of multi-peak optimization in partial shading.In order to verity the rationality of the algorithm,the experimental circuit of PV array under nonuniform shadow conditions is built.The experimental results show that compared with the traditional P&O method,the algorithm proposed is capable of fast tracking the global maximum power point to make the system work stably in the vicinity of the maximum power point,to reduce the fluctuations of output power,thus making full use of solar energy.