JPS648303A - Control method of power load unbalance relay - Google Patents

Control method of power load unbalance relay

Info

Publication number
JPS648303A
JPS648303A JP62162259A JP16225987A JPS648303A JP S648303 A JPS648303 A JP S648303A JP 62162259 A JP62162259 A JP 62162259A JP 16225987 A JP16225987 A JP 16225987A JP S648303 A JPS648303 A JP S648303A
Authority
JP
Japan
Prior art keywords
load
plu
range
relay
efficiency
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.)
Granted
Application number
JP62162259A
Other languages
Japanese (ja)
Other versions
JP2527751B2 (en
Inventor
Takuji Nishinomiya
Takayoshi Maeda
Hiroshi Ikeda
Sadao Yanagida
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
Hitachi Industry and Control Solutions Co Ltd
Original Assignee
Hitachi Engineering Co Ltd Ibaraki
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 Engineering Co Ltd Ibaraki, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd Ibaraki
Priority to JP62162259A priority Critical patent/JP2527751B2/en
Publication of JPS648303A publication Critical patent/JPS648303A/en
Application granted granted Critical
Publication of JP2527751B2 publication Critical patent/JP2527751B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Control Of Turbines (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

PURPOSE:To prevent a power load unbalance relay from making unnecessary action by dividing the range of the load efficiency in a steam turbine generating plant into a plurality of sections and setting the quick load reduction rate at which the relay is to be operated for each section. CONSTITUTION:A power load unbalance relay, that is, PLU operates when a sudden reduction in load occurs with a steam turbine generating plant operating at the specified load efficiency or more. In such case a plurality of PLU operation performances are set with the threshold of X% in the load efficiency. That is, PLU operates under the load ranging from X% to full. Within said operation range, the PLU operation performance is set to A%/sec at the load X% to another X% and set to B%/sec at the load X% or more. These set values can be changed by a converter according to the output of a generator or the load. The sudden load reduction rate within the higher load range is set higher than that within the lower load range.
JP62162259A 1987-07-01 1987-07-01 Control method for power load unbalance relay Expired - Fee Related JP2527751B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62162259A JP2527751B2 (en) 1987-07-01 1987-07-01 Control method for power load unbalance relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62162259A JP2527751B2 (en) 1987-07-01 1987-07-01 Control method for power load unbalance relay

Publications (2)

Publication Number Publication Date
JPS648303A true JPS648303A (en) 1989-01-12
JP2527751B2 JP2527751B2 (en) 1996-08-28

Family

ID=15751038

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62162259A Expired - Fee Related JP2527751B2 (en) 1987-07-01 1987-07-01 Control method for power load unbalance relay

Country Status (1)

Country Link
JP (1) JP2527751B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107013261A (en) * 2017-05-02 2017-08-04 国网重庆市电力公司 A kind of power load unbalance protection criterion based on rotating speed and power signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107013261A (en) * 2017-05-02 2017-08-04 国网重庆市电力公司 A kind of power load unbalance protection criterion based on rotating speed and power signal

Also Published As

Publication number Publication date
JP2527751B2 (en) 1996-08-28

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees