论文标题
在独立光伏（PV）岛的微网中，用于电压控制的逆变器的硬件在环上，具有不平衡和非线性负载
Control Hardware-in-the-loop for Voltage Controlled Inverters with Unbalanced and Non-linear Loads in Stand-alone Photovoltaic(PV) Islanded Microgrids
论文作者
论文摘要
与局部分布式能源（DER）连接到微电网（MG）的不平衡和非线性载荷是功率质量问题的两个主要原因。非线性载荷引入电压和当前的谐波，单相负载会导致三相网络中的电压和当前失衡。本文提出了一种用于电压控制的电压控制光伏（PV）逆变器的分层控制方案，该逆变器具有微网格中不平衡和非线性载荷。分层控制由主要控制和电压补偿控制（VCC）和直流电压调节器（VR）组成。主要控制方案控制着主动和反应性的功率共享，VCCCCREDED电压和谐波失真。使用OPAL-RT实时仿真验证了该方案的有效性，并使用控制硬件在环上进行了实验。赔偿后，共同耦合点（PCC）处的电压失真从6.38％降至1.91％，而不平衡和谐波负载在DG单位中成比例地共享。
Unbalanced and nonlinear loads connected to microgrids (MG) with local distributed energy resources (DERs) are two of the leading causes of power quality problems. Nonlinearloads introduce voltage and current harmonics, and single-phase loads can cause voltage and current imbalances in a three-phase network. This paper presents a hierarchical control scheme for voltage-controlled photovoltaic (PV) inverters with unbalanced and nonlinear loads in micro-grids. The hierarchical control consists of primary control and voltage compensation control(VCC) and a DC voltage regulator (VR). The primary control scheme controls active and reactive power-sharing and the VCCregulates the unbalanced voltage and harmonics distortion. The effectiveness of the scheme is verified using Opal-RT real-time simulation and experimentally using control hardware-in-the-loop. The voltage distortion at the point of common coupling (PCC)decreased from 6.38 percent to 1.91 percent after compensation, while the unbalanced and harmonic loads are shared proportionally among the DG units.
