This paper analyzes the dynamic performance of the predictive current control (PCC) scheme for a single-phase grid-connected (SPGC) voltage source inverter (VSI). VSI performance and its operating conditions, such as steady-state and dynamic-state, have been analyzed. Conventionally a linear current error (e_L)-based control technique is used, which has poorer current tracking during dynamic conditions. In this paper, a novel control technique has been proposed that utilizes a non-linear current error (e_NL) based on the instantaneous grid voltage and DC-link voltage to calculate the switching instant, which gives better tracking performance during the dynamic condition. A mathematical model of digitally controlled PCC predicts the load current for all switching states of the inverter. Calculations of these predicted current values are done by using a cost function. The switching state with minimum cost function is selected and applied to the inverter for improved dynamic performance. The effect of parameter variations, such as load current, DC-link voltage etc., has been investigated. The performance of the proposed method has been tested at different sampling frequencies. The effectiveness of the PCC technique is simulated in specialized power electronics software and experimentally validated by a proto-type model using an FPGA controller.

本文分析了单相并网 (SPGC) 电压源逆变器 (VSI) 的预测电流控制 (PCC) 方案的动态性能。分析了 VSI 的性能及其运行条件，例如稳态和动态。通常使用基于线性电流误差 (e _{L ) 的控制技术，该技术在动态条件下具有较差的电流跟踪。}在本文中，提出了一种利用非线性电流误差 (e _NL) 基于瞬时电网电压和 DC-link 电压来计算开关瞬间，从而在动态条件下提供更好的跟踪性能。数控 PCC 的数学模型可预测逆变器所有开关状态的负载电流。这些预测当前值的计算是通过使用成本函数来完成的。选择具有最小成本函数的开关状态并将其应用于逆变器以提高动态性能。已经研究了负载电流、直流母线电压等参数变化的影响。所提出方法的性能已经在不同的采样频率下进行了测试。PCC 技术的有效性在专门的电力电子软件中进行了模拟，并通过使用 FPGA 控制器的原型模型进行了实验验证。