CAJ | 학술논문

针对光伏发电系统最大功率跟踪（MPPT）恒定电压控制法的缺点,提出了一种新的基于温度系数在线修正的改进恒定电压法,与传统的恒定电压法相比,它能更快速地跟踪最大功率点。在此基础上引入小步长的扰动观察法,对最大功率点处的稳态特性进行优化,可有效地减小光伏阵列的输出功率在最大功率点处的振荡现象。即在系统偏离最大功率点较大时,采用改进恒定电压法控制,快速调整光伏电池的工作点,再采用小步长扰动观察法进行最大功率控制。最后通过仿真验证了该双模式控制策略的正确性和有效性。
침대광복발전계통최대공솔근종（MPPT）항정전압공제법적결점,제출료일충신적기우온도계수재선수정적개진항정전압법,여전통적항정전압법상비,타능경쾌속지근종최대공솔점。재차기출상인입소보장적우동관찰법,대최대공솔점처적은태특성진행우화,가유효지감소광복진렬적수출공솔재최대공솔점처적진탕현상。즉재계통편리최대공솔점교대시,채용개진항정전압법공제,쾌속조정광복전지적공작점,재채용소보장우동관찰법진행최대공솔공제。최후통과방진험증료해쌍모식공제책략적정학성화유효성。
For the defect of photovoltaic maximum power point tracking (MPPT) constant voltage control method, a new improved constant voltage method based on on-line correction of temperature coefflcient was presented. Compared to the traditional method, it can quickly track the maximum power point. On the basis of introducing small step perturbation and observation method, the steady state characteristics of the maximum power point was optimized, which could effectively reduce the output of photovoltaic array in the maximum power point oscillation. When system deviates fi'om the maximum power point too large, the photovoltaic battery working point could be rapidly adjusted using the improved method of constant voltage control and lately using small step perturbation and observation method to make the maximum power control. Finally the simulation verifies the validity and effectivity of the double mode control strategy.