Capacity Analysis of Distributed Photovoltaic Generation Based on Current Protection in Distribution Network

被引：0
|
作者：
Deng J. [1 ]
Wang Y. [1 ]
Sun D. [1 ]
Yan H. [2 ]
Zheng C. [2 ]
机构：
[1] Guangdong Power Grid Co. Ltd, Huizhou Power Bureau, Huizhou
[2] Guangzhou Power Electrical Technology Co. Ltd, Guangzhou
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷
关键词：
Current protection; Inverter-interfaced distributed generation (IIDG); Low-voltage-ride-through (LVRT); Short-circuit calculation;
D O I：
10.19595/j.cnki.1000-6753.tces.L80542
中图分类号：
学科分类号：
摘要：
Overcurrent protection is widely used in 10kV distribution network. However, the integration of distributed generations makes a single-power-supply radial network become a scattered multi-source system. And the conventional overcurrent protection will not be applicable for this complex system, which reduces reliability of the network. The paper estabilished a control model of inverter-interfaced distributed generation (IIDG), and the influence of IIDG on current protection is analyzed. Under the constraint of the selectivity and sensibility of current protection, this paper aims to figure out the optimal capacity of IIDG installed in different locations without any additional equipment and change of the original overcurrent setting. The low-voltage-ride-through (LVRT) characteristic of IIDG is considered during the iterative calculation of the short-circuit calculation. The nonlinear relationship between the fault voltage at points of common coupling (PCC) and fault current provided by IIDG is also modified until the voltage converges. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：629 / 636
页数：7
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