• IEEE DRAFT C37.116 : D9 2006

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.


    Available format(s): 

    Superseded date:  07-08-2007


    Published date:  12-01-2013

    Publisher:  Institute of Electrical & Electronics Engineers

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    Table of Contents - (Show below) - (Hide below)

    1 Overview
      1.1 Scope
      1.2 Purpose
    2 Normative references
    3 Preliminary considerations
      3.1 Major equipment considerations
          3.1.1 Capacitor unit
          3.1.2 Capacitor fusing and unit arrangement
          3.1.3 Overvoltage protective devices
          3.1.4 Discharge current-limiting reactor
          3.1.5 Bypass switch and bypass gap
          3.1.6 Thyristor-protected series capacitors (TPSC)
      3.2 System conditions
          3.2.1 System representation
          3.2.2 Fault current
          3.2.3 Line
          3.2.4 Low-frequency transients
          3.2.5 Subharmonic resonance or subsynchronous resonance (SSR)
          3.2.6 System unbalance
          3.2.7 Required speed for reinsertion
      3.3 Duty cycle
      3.4 Multiple segment series capacitors
      3.5 Single-phase trip/reclose considerations
          3.5.1 System requirements
          3.5.2 Bank requirements
          3.5.3 Line protection requirements
      3.6 Impact on line protection
      3.7 Line protection and series capacitor protection/control
          3.7.1 Capacitor deenergize/energize logic
          3.7.2 Line protection initiated triggering of bypass gap
    4 Protective functions
      4.1 Protection and control philosophy
          4.1.1 Introduction
          4.1.2 Protection and control functions
          4.1.3 Capacitor bank physical configuration
          4.1.4 Reduction
      4.2 MOV protection
          4.2.1 MOV energy calculations
          4.2.2 MOV protection functions
      4.3 Capacitor protection
          4.3.1 Capacitor unit failure protection
          4.3.2 Capacitor unbalance protection
          4.3.3 Capacitor overload protection
      4.4 Bypass gap protection
          4.4.1 Introduction
          4.4.2 Gap only scheme
          4.4.3 MOV scheme with forced triggered bypass gap
          4.4.4 Applied bypass gap protection
      4.5 Platform fault protection
          4.5.1 Flashover to platform protection
          4.5.2 Platform-to-ground protection
      4.6 Bypass switch protection
      4.7 Discharge current-limiting reactor protection
    5 Platform power and signal transmission
      5.1 Current transformer supply
      5.2 Coupling capacitor voltage transformer supply
      5.3 Optically-powered supply
      5.4 Battery supply
      5.5 Power supplies specific to bypass gap firing circuits
      5.6 Platform information transmission methods
    6 Control and monitoring functions
      6.1 Control actions
          6.1.1 Lockout bypass
          6.1.2 Permanent bypass
          6.1.3 Temporary bypass
          6.1.4 Automatic control
          6.1.5 Bank interlocks
      6.2 Monitoring
          6.2.1 Human machine interface (HMI)
          6.2.2 Digital fault recorders (DFRs) and sequential
                event recording systems (SERs)
    7 Additional protection considerations
      7.1 Environmental
      7.2 Insulation
      7.3 Electromagnetic interference
      7.4 Bypass gap firing circuits
    8 Testing
      8.1 Pre-energization tests
      8.2 Energization sequence tests and operation tests
          8.2.1 Voltage test
          8.2.2 Energization test with load current (through a
                shunt reactor)
          8.2.3 Normal sequence for capacitor bank energization
      8.3 Protection functions with bank energized verification test
          8.3.1 Low MOV current injection test
          8.3.2 Capacitor unbalance
      8.4 Immunity test
      8.5 Fault tests
          8.5.1 Benefits of staged fault testing
          8.5.2 Disadvantages of staged fault testing
    Annex A (informative) Glossary
    Annex B (informative) Low frequency transients
    Annex C (informative) Typical economic evaluation for a
            redundant protection and control unit
    Annex D (informative) Example utility calculations for MOV
            protection functions
    Annex E (informative) Calculation of unbalance currents for
            an H-configured externally-fused series capacitor bank
    Annex F (informative) Calculation of unbalance currents for
            an H-configured internally-fused series capacitor bank
    Annex G (informative) Calculation of unbalance currents for
            a fuseless series capacitor bank
    Annex H (informative) Summary of suggested
            alarms/indications/control action
    Annex I (informative) Actual staged fault test results
    Annex J (informative) Bibliography

    Abstract - (Show below) - (Hide below)

    Specifies the application of protective relays on transmission line series capacitors. The guide will provide alternative approaches to the design, testing, and maintenance of protective relays based on the latest knowledge and the application experience of the industry. The guide will also cover issues related to the reliability of the protection system.

    General Product Information - (Show below) - (Hide below)

    Comment Closes On
    Document Type Draft
    Publisher Institute of Electrical & Electronics Engineers
    Status Superseded
    Superseded By

    Standards Referencing This Book - (Show below) - (Hide below)

    IEEE/IEC C37.111-2013 REDLINE IEEE/IEC International Standard - Measuring relays and protection equipment - Part 24: Common format for transient data exchange (COMTRADE) for power systems
    IEEE C37.113-1999 IEEE Guide for Protective Relay Applications to Transmission Lines
    IEEE 18-2012 IEEE Standard for Shunt Power Capacitors
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