Parameters Design and Example of Unified Power Flow Controller with Fault Current Limiting

doi:10.3969/j.issn.1000－7229.2013.11.001

Abstract

Abstract:

The unified power flow controller with fault current limiting （UPFC-FCL） can protect UPFC from being damaged by short-circuit current when a short-circuit fault occurs in power system. Based on UPFC working principle, a parameter design method was proposed. The maximum compensation voltage was determined according to the maximum compensation capacity and rated current, and then the rated DC bus voltage was fixed. The value range of filter inductance was proposed based on the compensation capacity target, and current-limiting inductance was designed based on short-circuit current level. According to the design method above, a design example was presented that the rated voltage was 10 kV and the maximum compensation capacity was 1 MVA, and then the maximum compensation voltage which came from series converter, the rated voltage of DC bus, the filter inductance of series converter and shunt converter, the current-limiting inductance were determined. The PSCAD/EMTDC simulation results demonstrate that the design is effective and practical.

Key words: power system, unified power flow controller （UPFC）, current limiting, parameter

SHEN Chen, JIANG Daozhuo, LYU Wentao, WANG Yufen, YAN Bo. Parameters Design and Example of Unified Power Flow Controller with Fault Current Limiting[J]. ELECTRIC POWER CONSTRUCTION, 2013, 34(11): 1-6.

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