IEC 60834-1 : 2.0

TELEPROTECTION EQUIPMENT OF POWER SYSTEMS - PERFORMANCE AND TESTING - PART 1: COMMAND SYSTEMS

International Electrotechnical Committee

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1 General
      1.1 Scope
      1.2 Normative references
      1.3 Service conditions
      1.4 Telecommunication system used
      1.5 Definitions
2 Characteristics of command type teleprotection systems
      2.1 Types of teleprotection command schemes
             (telecommunication circuit included)
      2.3 Transmission times (telecommunication circuit
             excluded)
      2.4 Security
      2.5 Dependability
      2.6 Nominal frequency band or bit rate
      2.7 Nominal impedance
      2.8 Guard signals/Command signals
      2.9 Levels of guard signals (analogue systems only)
      2.10 Levels of command signals (analogue systems
             only)
3 Requirements for command type teleprotection systems
      3.1 General equipment interface requirements
      3.2 Specific power supply requirements
      3.3 Teleprotection system performance requirements
4 Methods for performance testing
      4.1 General equipment interface tests
      4.2 Specific power supply tests
      4.3 Teleprotection system performance tests
Annex A (informative) Teleprotection system performance tests
Annex B (informative) Binary symmetric channel (BSC) model
Annex C (informative) Example of a security analysis for a
                      simple protocol
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publication
Figure 1 - Voice frequency configuration
Figure 2 - Power line carrier frequency configuration
Figure 3 - Directly connected digital teleprotection (example)
Figure 4 - Digital teleprotection connected via a multiplexed
           communication system
Figure 5 - Fundamental terms on protection and teleprotection
Figure 6 - Typical operating times for protection systems
           incorporating teleprotection
Figure 7 - Test circuit for testing power supply interruptions
Figure 8 - Test circuit for LF disturbance emission
           measurement
Figure 9 - Examples of the probability of missing command
           versus signal-to-noise ratio
Figure 10 - Test set-up for dependability measurement
            (analogue teleprotection)
Figure 11 - Test set-up for dependability measurement (digital
            teleprotection)
Figure 12 - Test set-up for security measurement (analogue
            teleprotection)
Figure 13 - Test set-up for security measurement (digital
            teleprotection)
Figure 14 - Examples of probability of unwanted commands
            versus signal-to-noise ratio for 200 Bd channel
Figure 15 - Test set-up for measuring transmission time
Figure 16 - Test set-up for measuring interference by discrete
            frequencies
Figure 17 - Test set-up for measuring interference by
            frequency deviation
Figure 18 - Frequency deviation versus time for test set-up
            in Figure 17
Figure 19 - Test set-up for recovery time measurement for
            digital teleprotection
Figure 20 - Test set-up for recovery time measurement for
            analogue teleprotection
Figure 21 - Performance guidance figures for various
            teleprotection schemes
Figure 22 - Example of dependability curves for digital
            teleprotection
Figure 23 - Example of security curve for digital
            teleprotection
Figure 24 - Test set-up for measuring jitter at the output of
            a digital teleprotection transmitter
Figure 25 - Jitter mask for testing jitter at the input of a
            digital teleprotection receiver
Figure A.1 - Graph showing the uncertainty of probability for
             a confidence level for 95% for various values of
             E and N
Figure A.2 - Examples of probability of unwanted commands
             versus signal-to-noise ratio for a 200 Bd channel

Abstract

Applicable to teleprotection command systems for conveying command information, usually in conjunction with protection equipment. Establishes recommended test procedures and performance requirements for command type teleprotection equipment. Information conveyed may be in either digital or analogue form. The equipment referred to may be voice frequency or power line carrier equipment, for use with various telecommunications systems. Also, the command type teleprotection may be digital equipment used with digital telecommunication systems.