To solve the following problems associated with conventional static var compensators (SVCs): when system voltage is unbalanced, a tertiary harmonic current flows out to the system side and thus tertiary harmonic voltage is distorted and other equipment is harmfully influenced; since a tertiary harmoic filter is required, a cost is enhanced; and when control is carried out to make identical the fundamental wave currents of the respective phases of SVC to suppress the outflow of a tertiary harmonic current, the control becomes unstable and tertiary harmonics are expanded.
A static var compensator 3 is so constructed that the phases of the currents of reactors 4a, 4b, 5a, 5b, 6a, 6b are controlled by thyristors 7, 8, 9 on a phase-by-phase basis and var is thereby controlled. The compensator is provided with detecting means 104a, 104b, 104c for detecting tertiary harmonic currents passed through the respective phases of the compensator. The thyristors of the respective phases are controlled so that the amounts of produced tertiary harmonic currents are equalized in the respective phases based on the tertiary harmonic currents passed through the respective phases detected by these detecting means.
TENMA KOJI
| JP2000276243A | 2000-10-06 | |||
| JP2001339959A | 2001-12-07 | |||
| JPH0869333A | 1996-03-12 | |||
| JP2001045664A | 2001-02-16 | |||
| JPH0638532A | 1994-02-10 |
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami
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