Abstract
Distributed generations can be divided into traditional synchronous generators and inverter interfaced distributed generations (IIDG) according to their different operation mode. While the fault characteristics of IIDG is different from traditional Distributed Generators, the in-depth analysis on output characteristics and fault characteristics of IIDG are the foundation of micro grid protection. The mathematical models under P/Q and V/F control strategy are discussed. After simplifying its model, the fault characteristics of IIDG under P/Q and V/F control strategy are studied using the simulation of PSCAD/EMTDC. The analysis on the fault characteristics of IIDG that lays the theoretical foundation for the micro-grid relay protection.
Highlights
As a key technology in smart grid, distributed power supply technology has attracted more attention [1].With the rapid development of power electronics technology, inverter interfaced distributed generation (IIDG) has been widely used [2]
In the process of IIDG transient analysis, DC source can be approximately used to replace the output of IIDG DC side without loss of generality [5]
It can be seen from the figure that the transient characteristics of IIDG mainly depend on the control strategy of the inverter, other factors can be ignored
Summary
As a key technology in smart grid, distributed power supply technology has attracted more attention [1].With the rapid development of power electronics technology, inverter interfaced distributed generation (IIDG) has been widely used [2]. The research on traditional rotating distributed generation (DG) is relatively mature for the time being, while limited research has been conducted on IIDG. It is necessary to analyze IIDG and its fault output characteristics for the distribution network protection [3, 4]
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