Harmonic impact of high penetration photovoltaic system on unbalanced distribution networks - learning from an urban photovoltaic network
Harmonic impact of high penetration photovoltaic system on unbalanced distribution networks - learning from an urban photovoltaic network
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高渗透光伏系统对不平衡配电网的谐波影响——以城市光伏网为例
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Mithulananthan
中科院分区：
文献类型：
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作者：
Annapoorna Chidurala;T. Saha;N. Mithulananthan
太阳能光伏系统在配电网中的装机量正在迅速增加。这些光伏系统包括电力电子设备，它们以谐波失真的形式对电网的电能质量产生影响。本研究的目的是研究光伏系统对配电网的谐波影响。对光伏系统渗透率较高的IEEE-13母线配电网进行了全面的谐波行为分析。一定程度的谐波也通过非线性负载注入到IEEE网络中，以类似于现实场景。研究通过对三个案例的模拟进行，即在单个节点的光伏系统集成，特别是在电源中存在和不存在背景失真的情况下，以及最后光伏在具有电源失真的多个节点上的渗透。此外，还在昆士兰大学光伏站点进行了一项评估研究，以验证模拟结果。重点研究了光伏系统对实际配电网的谐波贡献，以及谐波传播对变压器K因数的影响。结果表明，随着光伏系统数量的增加，电流和电压的总谐波畸变率超过限值，导致变压器过载和发热。
Solar photovoltaic (PV) system installations are rapidly increasing in distribution networks. These PV systems include power electronic devices which have an influence on the power quality of the grid in the form of harmonic distortion. The aim of this study is the harmonic impact of PV systems on distribution networks. A comprehensive harmonic behaviour analysis has been performed on the IEEE-13 bus distribution network with high PV systems penetration. A certain level of harmonics is also injected into the IEEE network through non-linear loads to resemble a realistic scenario. The investigation has been carried out through simulations of three case studies, namely PV system integrations at a single node in particular with and without the presence of background distortions in the supply and finally PV penetration at multiple nodes with supply distortions. Furthermore, an evaluation study has been conducted at the University of Queensland PV site to validate simulation results. This study has highlighted the PV systems harmonic contributions on real distribution networks and the impact of harmonics propagation on transformer K-factor. Results show that the total harmonic distortions of current and voltage are exceeding the limits when the number of PV systems increases, leading to transformer overloading and heating.