CAJ | 학술논문

为了克服光伏并网逆变系统受外界干扰和系统参数的不确定性等多种因素的干扰，以逆变器的输出滤波电容电压及其导数为状态变量，将反步法和滑模控制相结合，提出了基于反步滑模控制的光伏并网逆变器控制策略。推导了具有参数不确定和外界干扰情况下的逆变器的反馈控制律。为了获取光伏阵列的全局最大功率点(maximum power point， MPP)，提出了一种基于改进粒子群优化算法(particle swarm optimization，PSO)的最大功率点跟踪(maximum power point tracking，MPPT)方法，将占空比分为两部分进行初始化，建立了光伏阵列运行功率与占空比之间的线性关系。仿真和试验结果验证了所提控制策略的有效性。
위료극복광복병망역변계통수외계간우화계통삼수적불학정성등다충인소적간우，이역변기적수출려파전용전압급기도수위상태변량，장반보법화활모공제상결합，제출료기우반보활모공제적광복병망역변기공제책략。추도료구유삼수불학정화외계간우정황하적역변기적반궤공제률。위료획취광복진렬적전국최대공솔점(maximum power point， MPP)，제출료일충기우개진입자군우화산법(particle swarm optimization，PSO)적최대공솔점근종(maximum power point tracking，MPPT)방법，장점공비분위량부분진행초시화，건립료광복진렬운행공솔여점공비지간적선성관계。방진화시험결과험증료소제공제책략적유효성。
Since the photovoltaic (PV) grid-connected inverter system is easy to be affected by such factors as external interference and the uncertainty of its system parameters, taking the output voltage of filter capacitor and its derivative as state variables and integrating the back-stepping method with sliding mode control, a back-stepping sliding mode control based control strategy for PV grid-connected inverter is proposed, and the feedback control law for the inverter under parameter uncertainty and external interference is derived. To achieve the global maximum power point (MPP) of PV array, an improved particle swarm optimization (PSO) algorithm based maximum power point tracking (MPPT) method is put forward, and the duty ratio is divided into two parts for the initialization, thus a linear relation between the operational power of PV array and the duty ratio is established. The effectiveness of the proposed control strategy is validated by both results of simulation and experiments.