Title:
METHOD AND UNIT FOR PROTECTIVE SYSTEM INTERCONNECTION OF POWER CONVERTER
Document Type and Number:
Japanese Patent JP3311114
Kind Code:
B2
Abstract:
PURPOSE: To provide a method and unit for protective system interconnection of power converter in which the single operation can be detected quickly and positively even under a state where effective power and reactive power are balanced.
CONSTITUTION: A reactive power control circuit 16 controls the amount of reactive power at the interconnection of an inverter 2 and an AC system power supply 7 and a frequency detecting circuit 22 detects the frequency of output voltage from the inverter 2. The detected frequency is converted through a reactive power function circuit 23 into a reference amount of reactive power having predetermined characteristics. It is then added to a steady reactive power by an adder circuit 23 to produce a reactive power reference which is fed to a reactive power control circuit 16.
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Inventors:
Chihiro Okatsuchi
Tatsuaki Anbo
Tatsuaki Anbo
Application Number:
JP26248893A
Publication Date:
August 05, 2002
Filing Date:
October 20, 1993
Export Citation:
Assignee:
Toshiba IT Control Systems Co., Ltd.
Toshiba Corporation
Toshiba Corporation
International Classes:
G01R19/06; H02J3/38; H02M7/48; H02M7/493; (IPC1-7): H02J3/38; G01R19/06; H02M7/48
Domestic Patent References:
| JP6423726A | ||||
| JP6271428A | ||||
| JP6311653A | ||||
| JP1105343U |
Attorney, Agent or Firm:
Hideaki Tokawa (1 outside)
Takehiko Suzue
Takehiko Suzue