Microgrid Protection
Microgrid Protection
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DOI：
10.1109/pes.2007.385805
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
H. Nikkhajoei;R. Lasseter
中科院分区：
文献类型：
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作者：
H. Nikkhajoei;R. Lasseter
一般来说，微电网可以在并网模式和孤岛模式下运行，其中微电网通过称为静态开关（SS）的快速半导体开关与主电力系统连接。保护微电网在并网和孤岛运行模式下免受所有类型的故障至关重要。主要问题出现在使用逆变器电源的孤岛运行中。逆变器故障电流受到硅器件额定值的限制，约为 2 p.u.额定电流。基于微电网的孤岛逆变器中的故障电流可能没有足够的幅度来使用传统的过流保护技术。保护的理念是对孤岛和并网运行采用相同的保护策略。静态开关设计为在所有故障时打开。
In general, a microgrid can operate in both the grid-connected mode and the islanded mode where the microgrid is interfaced to the main power system by a fast semiconductor switch called static switch, (SS). It is essential to protect a microgrid in both the grid-connected and the islanded modes of operation against all types of faults. The major issue arises in island operation with inverter-based sources. Inverter fault currents are limited by the ratings of the silicon devices to around 2 p.u. rated current. Fault currents in islanded inverter based microgrids may not have adequate magnitudes to use traditional overcurrent protection techniques. The philosophy for protection is to have the same protection strategies for both islanded and grid-connected operation. The static switch is designed to open for all faults.