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Development of a three‐phase unbalanced voltage fluctuation compensating system using a self‐commutated static var compensator
Author(s) -
Takeda Masatoshi,
Murakami Shotaro,
Iizuka Akihiro,
Mochinaga Yoshifumi
Publication year - 1997
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19971130)121:3<67::aid-eej9>3.0.co;2-v
Subject(s) - voltage , ac power , static var compensator , control theory (sociology) , compensation (psychology) , electric power system , volt ampere reactive , power (physics) , engineering , voltage optimisation , electrical engineering , computer science , physics , psychology , control (management) , quantum mechanics , artificial intelligence , psychoanalysis
This paper describes a self‐commutated static var compensator for suppressing voltage fluctuations caused by an ac electric railway (Shinkansen, or new trunk line). The ac electric railway is a single‐phase load with large changes of reactive power and it causes large voltage fluctuations and power imbalances among the three phases in the power system. The authors have developed a new voltage fluctuation compensating system using a self‐commutated static var compensator. This system has the functions of reactive power compensation and negative‐phase‐sequence current absorption. It can suppress rapidly changing voltage fluctuations and reduce the three‐phase power imbalance caused by the ac electric railway effectively. This compensating system, with a capacity of 40 MVA, was put to practical use for the first time in the world in 1993. The test results at the site show that the system has excellent performance characteristics. A theoretical analysis of the characteristics of voltage fluctuations with or without the compensating system and an evaluation of test results, including a comparison between the theoretical and measured values, are also reported. © 1998 Scripta Technica, Inc. Electr Eng Jpn, 121(3): 67–78, 1997