BSI PD IEC/TS 62910:2015
$142.49
Utility-interconnected photovoltaic inverters. Test procedure for low voltage ride-through measurements
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 30 |
This Technical Specification provides a test procedure for evaluating the performance of Low Voltage Ride-Through (LVRT) functions in inverters used in utility-interconnected PV systems.
The technical specification is most applicable to large systems where PV inverters are connected to utility HV distribution systems. However, the applicable procedures may also be used for LV installations in locations where evolving LVRT requirements include such installations, e.g. single-phase or 3-phase systems.
The assessed LVRT performance is valid only for the specific configuration and operational mode of the inverter under test. Separate assessment is required for the inverter in other factory or user-settable configurations, as these may cause the inverter LVRT response to behave differently.
The measurement procedures are designed to be as non-site-specific as possible, so that LVRT characteristics measured at one test site, for example, can also be considered valid at other sites.
This technical specification is for testing of PV inverters, though it contains information that may also be useful for testing of a complete PV power plant consisting of multiple inverters connected at a single point to the utility grid. It further provides a basis for utility-interconnected PV inverter numerical simulation and model validation.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | 1 Scope 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Terms, definitions and symbols |
| 10 | 3.2 Abbreviations |
| 11 | 4 Test circuit and equipment 4.1 General 4.2 Test circuit 4.3 Test equipment 4.3.1 Measuring instruments Figures Figure 1 – Testing circuit diagram |
| 12 | 4.3.2 DC source 4.3.3 Short-circuit emulator Tables Table 1 – Accuracy of measurements |
| 13 | Figure 2 – Short-circuit emulator |
| 14 | Table 2 – Fault type and switch status |
| 15 | 4.3.4 Converter based grid simulator 5 Test 5.1 Test protocol Figure 3 – Converter device example |
| 16 | Table 3 – Test specification for LVRT (indicative) (1 of 2) |
| 17 | 5.2 Test curve |
| 18 | 5.3 Test procedure 5.3.1 Pre-test 5.3.2 No-load test 5.3.3 Tolerance Figure 4 – LVRT curve example |
| 19 | 5.3.4 Load test 6 Assessment criteria Figure 5 – Tolerance of voltage drop |
| 20 | Annex A (informative) Circuit faults and voltage drops A.1 Fault types Table A.1 – Short-circuit paths for different fault types |
| 22 | A.2 Voltage drops A.2.1 General A.2.2 Three-phase short-circuit fault Figure A.1 – Grid fault diagram Figure A.2 – Diagram of voltage vector for three-phase short-circuit fault |
| 23 | A.2.3 Two-phase short-circuit fault with ground Figure A.3 – Diagram of voltage vector of two-phase (BC) short-circuit fault with ground Table A.2 – Amplitude and phase changes in three-phase short-circuit fault |
| 24 | A.2.4 Two-phase short-circuit fault without ground Figure A.4 – Diagram of voltage vector of two-phase (BC) short-circuit fault Table A.3 – Amplitude and phase changes in two-phase (BC) short-circuit fault with ground Table A.4 – Amplitude and phase changes in two-phase (BC) short-circuit fault |
| 25 | A.2.5 Single-phase short-circuit fault with ground Figure A.5 – Diagram of voltage vector of single-phase (A) short-circuit fault with ground Table A.5 – Amplitude and phase changes in single-phase (A) short-circuit fault with ground |
| 26 | Annex B (informative) Determination of critical performance values in LVRT testing B.1 General B.2 Drop depth ratio B.3 Ride-through time B.4 Reactive current |
| 27 | B.5 Active power Figure B.1 – Determination of reactive current output Figure B.2 – Determination of active power recovery |
| 28 | Bibliography |
