BSI PD IEC TS 63217:2021

$142.49

Utility-interconnected photovoltaic inverters. Test procedure for over voltage ride-through measurements

Published By	Publication Date	Number of Pages
BSI	2021	26

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This document provides a test procedure for evaluating the performance of Over Voltage Ride-Through (OVRT) functions in inverters used in utility-interconnected photovoltaic (PV) systems.

This document is most applicable to large systems where PV inverters are connected to utility high voltage (HV) distribution systems. However, the applicable procedures may also be used for low voltage (LV) installations in locations where evolving OVRT requirements include such installations, e.g. single-phase or 3-phase systems.

Fundamentally, the assessed OVRT 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 OVRT response to behave differently.

The measurement procedures are designed to be as non-site-specific as possible, so that OVRT characteristics measured at one test site, for example, can also be considered valid at other sites.

This document 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 inverters numerical simulation and model validation.

PDF Catalog

PDF Pages	PDF Title
2	undefined
4	CONTENTS
6	FOREWORD
8	1 Scope 2 Normative references
9	3 Terms, definitions, symbols and abbreviated terms 3.1 Terms, definitions and symbols
12	3.2 Abbreviated terms 4 Test circuit and equipment 4.1 General 4.2 Test circuit
13	4.3 Test equipment 4.3.1 Measuring instruments 4.3.2 DC source Figures Figure 1 – Testing circuit diagram Table 1 – Accuracy of measurements
14	4.3.3 Multi-tap transformer 4.3.4 Grid fault simulator Figure 2 – RLC-series emulator for three-phase EUT Figure 3 – RLC-series emulator for single-phase EUT
16	5 Test 5.1 Test protocol Figure 4 – Converter based emulator for three-phase EUT Figure 5 – Converter based emulator for single-phase EUT
17	Table 2 – Test specification for OVRT (indicative)
18	5.2 Test curve 5.3 Test procedure 5.3.1 Pre-test 5.3.2 No-load test 5.3.3 Tolerance Figure 6 – OVRT curve example
19	5.3.4 Load test 6 Assessment criteria Figure 7 – Tolerance of voltage swell
20	Annex A (informative)Determination of critical performance values in OVRT testing A.1 General A.2 Ride-through time A.3 Voltage swell ratio Figure A.1 – Critical performance values in OVRT testing
21	A.4 Reactive current A.5 Active power
22	Annex B (informative)OVRT curve and criteria B.1 General B.2 OVRT curve B.3 Test points Figure B.1 – Typical curve of OVRT
23	B.4 Criteria
24	Bibliography