BS IEC/IEEE 60255-118-1:2018:2019 Edition
$215.11
Measuring relays and protection equipment – Synchrophasor for power systems. Measurements
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 78 |
This part of IEC 60255 is for synchronized phasor measurement systems in power systems. It defines a synchronized phasor (synchrophasor), frequency, and rate of change of frequency measurements. It describes time tag and synchronization requirements for measurement of all three of these quantities. It specifies methods for evaluating these measurements and requirements for compliance with the standard under both static and dynamic conditions. It defines a phasor measurement unit (PMU), which can be a stand-alone physical unit or a functional unit within another physical unit. This document does not specify hardware, software or a method for computing phasors, frequency, or rate of change of frequency.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 8 | FOREWORD |
| 10 | INTRODUCTION |
| 12 | 1 Scope 2 Normative references 3 Terms, definitions, and abbreviated terms 3.1 Terms and definitions |
| 13 | 3.2 Abbreviated terms |
| 14 | 4 Synchrophasor measurement 4.1 Input and output quantities 4.2 Power system signal Figures Figure 1 – Input and output quantities |
| 15 | 4.3 Measurand definitions 4.3.1 Synchrophasor phase angle 4.3.2 Synchrophasor measurand 4.4 Frequency measurand definition |
| 16 | 4.5 Rate of change of frequency measurand definition 4.6 Measurement time synchronization 5 Measurement compliance evaluation 5.1 PMU measurement capability 5.2 Measurement evaluation 5.2.1 Synchrophasor measurement evaluation |
| 17 | 5.2.2 Frequency and ROCOF measurement evaluation 5.2.3 Measurement response time and delay time |
| 18 | 5.2.4 Overshoot and undershoot |
| 19 | Figure 2 – Step transition examples |
| 20 | 5.2.5 Measurement reporting latency 5.2.6 Measurement and operational errors |
| 21 | 5.3 Measurement reporting 5.3.1 General 5.3.2 Reporting rates 5.3.3 Reporting times 5.4 Measurement compliance 5.4.1 Performance classes Tables Table 1 – Standard PMU reporting rates |
| 22 | 5.4.2 Compliance verification 6 Measurement compliance test and evaluation 6.1 Testing considerations |
| 23 | 6.2 Reference and test conditions 6.3 Steady-state compliance |
| 24 | Table 2 – Steady-state synchrophasor measurement requirements |
| 26 | 6.4 Dynamic compliance – Measurement bandwidth Table 3 – Steady-state frequency and ROCOF measurement requirements |
| 28 | Table 4 – Synchrophasor measurement bandwidth requirements using modulated test signals Table 5 – Frequency and ROCOF performance requirements under modulation tests |
| 29 | 6.5 Dynamic compliance – Performance during ramp of system frequency |
| 31 | 6.6 Dynamic compliance – Performance under step changes in phase and magnitude Table 6 – Synchrophasor performance requirements under frequency ramp tests Table 7 – Frequency and ROCOF performance requirements under frequency ramp tests |
| 32 | 6.7 PMU reporting latency compliance Table 8 – Phasor performance requirements for input step change Table 9 – Frequency and ROCOF performance requirements for input step change Table 10 – PMU reporting latency |
| 33 | 7 Documentation |
| 34 | Annex A (informative)Time tagging and dynamic response A.1 Dynamic response A.2 Time tags |
| 35 | Figure A.1 – Frequency step test phase response without groupdelay compensation Figure A.2 – Frequency step test phase response after group delay compensation |
| 36 | A.3 Magnitude step test example Figure A.3 – Magnitude step test results for 3 different algorithms |
| 37 | A.4 PMU time input Figure A.4 – Magnitude step test example |
| 39 | Annex B (informative)Parameter representation and definition application examples B.1 General B.2 Representing non-stationary sinusoids |
| 40 | B.3 Introduction of definition application examples B.3.1 General B.3.2 Example 1: steady-state at nominal frequency B.3.3 Example 2: steady-state and constant off-nominal frequency |
| 41 | B.3.4 Example 3: oscillation of the phase and amplitude of the power signal Figure B.1 – Sampling a power frequency sinusoid at off-nominal frequency |
| 42 | B.3.5 Example 4: constant, non-zero rate of change of frequency |
| 43 | B.4 Reconstruction of the power system sinusoidal signal from the synchrophasor |
| 44 | Annex C (informative)PMU evaluation and testing C.1 General C.2 TVE measurement evaluation |
| 45 | C.3 Phase-magnitude relation in TVE and timing Figure C.1 – Total vector error (TVE) Figure C.2 – The 1 % TVE criterion shown on the end of a phasor |
| 46 | Figure C.3 – TVE as a function of magnitude for various phase errors |
| 47 | C.4 Evaluation of response to stepped input signals Figure C.4 – TVE as a function of phase for various magnitude errors |
| 48 | Figure C.5 – Example of step change measurements using a magnitude step at t = 0 |
| 49 | C.5 Harmonic distortion test signal phasing C.6 ROCOF limits C.6.1 General Table C.1 – Harmonic phase sequence in a balanced three-phase system |
| 50 | C.6.2 Derivation |
| 51 | C.7 PMU reporting latency Figure C.6 – PMU reporting latency example (actual PMU measurement) |
| 52 | Annex D (informative)Reference signal processing models D.1 General D.2 Basic synchrophasor estimation model |
| 53 | D.3 Timestamp compensation for low-pass filter group delay Figure D.1 – Single phase section of the PMU phasor signal processing model |
| 54 | D.4 Positive sequence, frequency, and ROCOF Figure D.2 – Complete PMU signal processing model |
| 55 | D.5 P Class reference model for phasor D.6 P class filter details |
| 56 | Figure D.3 – P class filter coefficient example (N = 2 × (16 – 1) = 30) Figure D.4 – P class filter response as a function of frequency |
| 57 | D.7 M class reference model for phasor |
| 58 | Figure D.5 – Reference algorithm filter frequencyresponse mask specification for M Class |
| 59 | D.8 Data rate reduction model Figure D.6 – M class filter coefficient example Table D.1 – M class low pass filter parameters |
| 60 | D.9 Trade-offs in the reference model D.9.1 Immunity to off-nominal components, reporting latency and time alignment Figure D.7 – Data rate reduction signal processing model Figure D.8 – Factors affecting estimation |
| 61 | D.9.2 Response time and the accuracy of synchrophasors, frequency and ROCOF measurements Figure D.9 – Reference filter magnitude frequency response with Fs = 60 fps |
| 63 | Annex E (informative)Synchrophasor measurement using sampled value input to PMU E.1 General E.2 Creation of sampled values Figure E.1 – Synchrophasors having sampled values as inputs |
| 64 | E.3 Sources of synchrophasor error when using sampled values E.4 Performance E.4.1 General E.4.2 Steady-state performance considerations |
| 65 | E.4.3 Dynamic performance considerations E.4.4 Latency |
| 66 | E.5 Proposed changes to performance requirements Table E.1 – Summary of proposed performance requirement changes |
| 68 | Annex G (normative)Extended accuracy specification for PMUs in steady-state G.1 General G.2 Applicable conditions G.3 Accuracy specification Table G.1 – Conditions for extended accuracy tests |
| 69 | G.4 Usage examples G.5 Preferred accuracy ranges G.6 Testing issues G.6.1 Testing for improved accuracy |
| 70 | G.6.2 Testing at currents exceeding continuous thermal rating G.6.3 Environmental considerations |
| 71 | Annex H (informative)Generator voltage and power angle measurement H.1 General H.2 Measurement methods H.3 Input signal H.4 Measuring process |
| 72 | Figure H.1 – Phasor diagram under no-load conditions Figure H.2 – Phasor diagram with load on generator |
| 73 | Annex I (normative)Extended PMU bandwidth classes I.1 General I.2 Bandwidth determination I.3 Enhanced bandwidth classes Table I.1 – Conditions for extended bandwidth testing |
| 74 | I.4 Testing issues |
| 75 | Bibliography |
Related products
-
BS IEC/IEEE 60255-118-1:2018:2019 Edition
Measuring relays and protection equipment – Synchrophasor for power systems. Measurements Published By Publication Date…
