JPS57103505A - Device number controller - Google Patents

Device number controller

Info

Publication number
JPS57103505A
JPS57103505A JP56153685A JP15368581A JPS57103505A JP S57103505 A JPS57103505 A JP S57103505A JP 56153685 A JP56153685 A JP 56153685A JP 15368581 A JP15368581 A JP 15368581A JP S57103505 A JPS57103505 A JP S57103505A
Authority
JP
Japan
Prior art keywords
period
load
suddenly increased
capacitor
increased
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
JP56153685A
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 JP56153685A priority Critical patent/JPS57103505A/en
Publication of JPS57103505A publication Critical patent/JPS57103505A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Feedback Control In General (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To avoid the excessive reactive power, by accelerating the detecting period for the increasing conditions of the number of devices compared with the normal mode in the time band where the load is suddenly increased. CONSTITUTION:The signal TR given from a timepiece device is set at 1 in a period during which the load is suddenly increased. For the control clock TC, the level of the reactive power is compared by a comparator CM1 and in the period of an oscillator. Then a capacitor is added when the increasing conditions is satisfied. The signal TR is set at 0 after the period when the load is suddenly increased, and the synchronism of the control clock is increased by the function of a counter 5 to prevent the increase of the switching frequency of a capacitor which is caused by a short-period fluctuation of the load.
JP56153685A 1981-09-30 1981-09-30 Device number controller Pending JPS57103505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56153685A JPS57103505A (en) 1981-09-30 1981-09-30 Device number controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56153685A JPS57103505A (en) 1981-09-30 1981-09-30 Device number controller

Publications (1)

Publication Number Publication Date
JPS57103505A true JPS57103505A (en) 1982-06-28

Family

ID=15567909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56153685A Pending JPS57103505A (en) 1981-09-30 1981-09-30 Device number controller

Country Status (1)

Country Link
JP (1) JPS57103505A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211508A (en) * 1984-04-05 1985-10-23 Hitachi Ltd Pump operation control system in liquid supply system
JPH01164518U (en) * 1988-05-02 1989-11-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211508A (en) * 1984-04-05 1985-10-23 Hitachi Ltd Pump operation control system in liquid supply system
JPH01164518U (en) * 1988-05-02 1989-11-16

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