基于配电网电流保护约束的分布式光伏电源容量分析

doi:10.19595/j.cnki.1000-6753.tces.L80542

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Abstract 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.

Key words： Inverter-interfaced distributed generation (IIDG) low-voltage-ride-through (LVRT) short-circuit calculation current protection

Received: 30 June 2018 Published: 02 January 2020

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TM73

Corresponding Authors: 广东电网有限责任公司科技资助项目（031300KK52160020）

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	Deng Jingsong
	Wang Yingmin
	Sun Difei
	Yan Hanting
	Zheng Chenling

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Deng Jingsong,Wang Yingmin,Sun Difei等. Capacity Analysis of Distributed Photovoltaic Generation Based on Current Protection in Distribution Network[J]. Transactions of China Electrotechnical Society, 2019, 34(zk2): 629-636.

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