JPS54118556A - Control of numbers of phase advance capacitor - Google Patents

Control of numbers of phase advance capacitor

Info

Publication number
JPS54118556A
JPS54118556A JP2538678A JP2538678A JPS54118556A JP S54118556 A JPS54118556 A JP S54118556A JP 2538678 A JP2538678 A JP 2538678A JP 2538678 A JP2538678 A JP 2538678A JP S54118556 A JPS54118556 A JP S54118556A
Authority
JP
Japan
Prior art keywords
capacitor
unit capacity
added
product obtained
reactive power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2538678A
Other languages
Japanese (ja)
Inventor
Masao Ishikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2538678A priority Critical patent/JPS54118556A/en
Publication of JPS54118556A publication Critical patent/JPS54118556A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To increase the number of switching at one time by the procedure in which the defference between reactive power and upper and lower set values for switching capacitors is multiplied by a predetermined factor, the product obtained is divided by the unit capacity of capacitor, and then the result is added to the decided number.
CONSTITUTION: The reactive power VAR is memorized in the work area WK(5), and the work area WK cedices whether VAR is smaller than the lower limit set value SL(10). The product obtained from multiplying WK-SL by a predetermined factor k1 is divided by the unit capacity Co, and then a whole number of the result is added to the number counter CU(15). Then, it is decided whether VAR is greater than the upper limit set value SR(20). The product obtained from multiplying WK-SR by a predetermined factor k2 is devided by the unit capacity Co and then a whole number of the result is added to the number counter(25). The capacitor Co of the unit capacity is closed or broken by the 2° bit of the counter CU, and the capacitor of the 2n; Co capacity is closed or broken by 2n bit(30). Thus, it is possible to make the response speed for preventing the occurrence of reactive power faster.
COPYRIGHT: (C)1979,JPO&Japio
JP2538678A 1978-03-08 1978-03-08 Control of numbers of phase advance capacitor Pending JPS54118556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2538678A JPS54118556A (en) 1978-03-08 1978-03-08 Control of numbers of phase advance capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2538678A JPS54118556A (en) 1978-03-08 1978-03-08 Control of numbers of phase advance capacitor

Publications (1)

Publication Number Publication Date
JPS54118556A true JPS54118556A (en) 1979-09-14

Family

ID=12164427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2538678A Pending JPS54118556A (en) 1978-03-08 1978-03-08 Control of numbers of phase advance capacitor

Country Status (1)

Country Link
JP (1) JPS54118556A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63114533A (en) * 1986-10-30 1988-05-19 富士電機株式会社 Power factor control system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5123648A (en) * 1974-08-22 1976-02-25 Fuji Electric Co Ltd
JPS5222137B2 (en) * 1973-04-04 1977-06-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222137B2 (en) * 1973-04-04 1977-06-15
JPS5123648A (en) * 1974-08-22 1976-02-25 Fuji Electric Co Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63114533A (en) * 1986-10-30 1988-05-19 富士電機株式会社 Power factor control system

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