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JPS57212378A - Method of protecting water turbine - Google Patents

Method of protecting water turbine

Info

Publication number
JPS57212378A
JPS57212378A JP56096531A JP9653181A JPS57212378A JP S57212378 A JPS57212378 A JP S57212378A JP 56096531 A JP56096531 A JP 56096531A JP 9653181 A JP9653181 A JP 9653181A JP S57212378 A JPS57212378 A JP S57212378A
Authority
JP
Japan
Prior art keywords
speed
rotation
resonance zone
critical resonance
water turbine
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
JP56096531A
Other languages
Japanese (ja)
Inventor
Katsumi Sakaguchi
Asami Sato
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 JP56096531A priority Critical patent/JPS57212378A/en
Publication of JPS57212378A publication Critical patent/JPS57212378A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F03B15/18—Regulating, i.e. acting automatically for safety purposes, e.g. preventing overspeed
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Water Turbines (AREA)

Abstract

PURPOSE:To protect a water turbine against resonance, by actuating brake in cast that oscillation frequency stands within a critical resonance zone for more than a predetermined time, and thereby bringing the oscillation frequency out of the critical resonance zone. CONSTITUTION:When starting instruction is given, a by-pass valve 8, down- stream seal ring 9 and main valve 7 of the inlet valve are opened in this order, and guide vanes 4 are once kept at its no-load opening. Subsequently, when the speed of rotation of a runner 1 is increased gradually with opening of the guide vanes 4 and reaches a level corresponding to the lower limit value of a critical resonance zone, a time-limit relay is energized. Here, in case that the speed of rotation is still lower than a value corresponding to the upper limit value of the critical resonance zone even after passing of a tolerable time period, operation of the water turbine is stopped immediately by lowering the speed of rotation by impressing generator brake and thereby bringing the speed of rotation out the critical resonance zone.
JP56096531A 1981-06-24 1981-06-24 Method of protecting water turbine Pending JPS57212378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56096531A JPS57212378A (en) 1981-06-24 1981-06-24 Method of protecting water turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56096531A JPS57212378A (en) 1981-06-24 1981-06-24 Method of protecting water turbine

Publications (1)

Publication Number Publication Date
JPS57212378A true JPS57212378A (en) 1982-12-27

Family

ID=14167706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56096531A Pending JPS57212378A (en) 1981-06-24 1981-06-24 Method of protecting water turbine

Country Status (1)

Country Link
JP (1) JPS57212378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016223368A (en) * 2015-06-01 2016-12-28 株式会社明電舎 Hydraulic power generation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016223368A (en) * 2015-06-01 2016-12-28 株式会社明電舎 Hydraulic power generation system

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