A Monitoring Technique for Reversed Power Flow Detection With High PV Penetration Level

被引:81
作者
Mortazavi, Hashem [1 ]
Mehrjerdi, Hasan [2 ]
Saad, Maarouf [1 ]
Lefebvre, Serge [3 ]
Asber, Dalal [3 ]
Lenoir, Laurent [3 ]
机构
[1] Quebec Univ ETS, Dept Elect & Comp Engn, Montreal, PQ H3C1 K3, Canada
[2] Qatar Univ, Dept Elect & Comp Engn, Doha 2713, Qatar
[3] Hydro Quebec Res Inst, Power Syst & Math, Varennes, PQ J3X 1S1, Canada
关键词
Monitoring; photovoltaic (PV) penetration; reverse power flow; smart grid; voltage control; VOLTAGE REGULATION; STORAGE;
D O I
10.1109/TSG.2015.2397887
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
The integration of renewable energy resources (RESs) in power systems poses many research challenges. Research shows that the RES output may exceed the consumed power during the day. Consequently, the direction of the power flow on distribution lines can be reversed during some periods. As the voltage regulator is normally designed for unidirectional power flow, this may cause voltage violations on the distribution feeder. Therefore, most utilities try to set a penetration level (PL) limit for safe operation. On the other hand, time varying and unbalanced loading are the main characteristics of distribution systems. Moreover installation of intermittent and nondispatchable photovoltaic (PV) devices increases the control problems of distribution system. This paper presents an impedance-based monitoring method for detection of distribution system current behavior. It will be shown that by utilizing this monitoring technique, not only the small variation of PV PL can be easily detected, but also some fast transients such as the effect of cloud movement on PV system can be monitored. This monitoring technique employs only local measurements of bus voltages and line current to measure the apparent impedance seen at the installation point. The practical application of measured impedance as a monitoring technique shows its effectiveness for distribution system monitoring in presence of various PV PL.
引用
收藏
页码:2221 / 2232
页数:12
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