太阳能路灯控制策略的优化探讨

Discussion on optimization of control strategy on solar street lamp

针对当前太阳能路灯受天气影响较大的缺点,提出了改进方案,包括太阳能电池充电的最大功率优化和LED路灯的调光策略。其中最大功率部分采用BOOST电路实现,算法采用固定电压法和变化的小步长占空比扰动观察法结合;LED灯的调光部分采用分时段,以及根据光照度、交通流量和蓄电池剩余电量,通过调整功率管的占空比实现自适应调光。并分别通过仿真和实验验证了方案的可行性。

The solar street lamp working condition is affected by the weather. In view of this great disadvantage, the study puts forward an improved scheme of the system, including the maximum power optimization and LED street lamp dimming strategies of solar battery charging. To achieve greatest power, the boost circuit is used, and fixed voltage method as well as the change of the step length of duty cycle perturbation and observation method is applied. Besides, LED lamp dimming part uses the time interval method, and according to the illumination, traffic flow and the remaining battery power, adjustments are made to realize the adaptive dimming. The scheme feasibility is verified by simulation and experiment.