Title:
CONTROL METHOD OF REACTIVE POWER COMPENSATING DEVICE
Document Type and Number:
Japanese Patent JPS6093536
Kind Code:
A
Abstract:
PURPOSE:To simplify a circuit and to improve control precision by detecting reactive power on the basis of the value obtained by subtracting the current which flows to a reactive power compensating device from the current at the composite initial power receiving point of a load and the reactive power compensating device. CONSTITUTION:A current transformer 14 detects load currents i3-1-i3-n and the composite current IT of the current iC of the compensating capacitor 8-2 of the reactive power compensating device and the current iL of the compensating reactor 8-1. Namely, iT=iS-1+-+iS-n+iL-iCo. The current transformer 8-5 detects the composite current iS of the current iC of the capacitor 802 and the current i1 of the reactor 8-1. Namely, iS=iL-iCo. Those outputs of the current transformer are inputted to a subtracting circuit 6-1 to perform arithmetic according to iT-iS=i3-1+-+iL-iC-(iL-iC)= i3-1+-+iS-no. Consequent ly, this circuit constitution simplifies the arithmetic. Further, the current signal inputted to a control circuit 7 does not contains the currents of the capacitor 8-2 and reactor 8-1.
Inventors:
NISHIKAWA TADASHI
Application Number:
JP19997183A
Publication Date:
May 25, 1985
Filing Date:
October 27, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
G05F1/70; H02J3/18; (IPC1-7): H02J3/18
Domestic Patent References:
| JP56156112B |
Attorney, Agent or Firm:
Noriyuki Noriyuki
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