IEC TS 63217:2021

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

IEC TS 63217:2021 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. 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.

General Information

• Status: Published
• Publication Date: 21-Nov-2021
• ICS: 27.160 - Solar energy engineering
• Technical Committee: TC 82 - Solar photovoltaic energy systems
• Drafting Committee: WG 6 - TC 82/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 22-Dec-2021
• Completion Date: 22-Nov-2021

Standards Content (Sample)

IEC TS 63217 ®
Edition 1.0 2021-11
TECHNICAL
SPECIFICATION
colour
inside
Utility-interconnected photovoltaic inverters – Test procedure for over voltage
ride-through measurements
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IEC TS 63217 ®
Edition 1.0 2021-11
TECHNICAL
SPECIFICATION
colour
inside
Utility-interconnected photovoltaic inverters – Test procedure for over voltage

ride-through measurements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-1051-2

– 2 – IEC TS 63217:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviated terms . 7
3.1 Terms, definitions and symbols . 7
3.2 Abbreviated terms . 10
4 Test circuit and equipment . 10
4.1 General . 10
4.2 Test circuit . 10
4.3 Test equipment . 11
4.3.1 Measuring instruments. 11
4.3.2 DC source . 11
4.3.3 Multi-tap transformer . 12
4.3.4 Grid fault simulator . 12
5 Test . 14
5.1 Test protocol . 14
5.2 Test curve . 16
5.3 Test procedure . 16
5.3.1 Pre-test . 16
5.3.2 No-load test . 16
5.3.3 Tolerance . 16
5.3.4 Load test . 17
6 Assessment criteria . 17
Annex A (informative) Determination of critical performance values in OVRT testing. 18
A.1 General . 18
A.2 Ride-through time . 18
A.3 Voltage swell ratio . 18
A.4 Reactive current. 19
A.5 Active power . 19
Annex B (informative) OVRT curve and criteria . 20
B.1 General . 20
B.2 OVRT curve . 20
B.3 Test points . 20
B.4 Criteria . 21
Bibliography . 22

Figure 1 – Testing circuit diagram . 11
Figure 2 – RLC-series emulator for three-phase EUT . 12
Figure 3 – RLC-series emulator for single-phase EUT . 12
Figure 4 – Converter based emulator for three-phase EUT . 14
Figure 5 – Converter based emulator for single-phase EUT . 14
Figure 6 – OVRT curve example . 16

Figure 7 – Tolerance of voltage swell . 17
Figure A.1 – Critical performance values in OVRT testing . 18
Figure B.1 – Typical curve of OVRT . 20

Table 1 – Accuracy of measurements . 11
Table 2 – Test specification for OVRT (indicative) . 15

– 4 – IEC TS 63217:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
UTILITY-INTERCONNECTED PHOTOVOLTAIC INVERTERS –
TEST PROCEDURE FOR OVER VOLTAGE RIDE-THROUGH
MEASUREMENTS
FOREWORD
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IEC TS 63217 has been prepared by IEC technical committee 82: Solar photovoltaic energy
systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
82/1926/DTS 82/1960/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.

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– 6 – IEC TS 63217:2021 © IEC 2021
UTILITY-INTERCONNECTED PHOTOVOLTAIC INVERTERS –
TEST PROCEDURE FOR OVER VOLTAGE RIDE-THROUGH
MEASUREMENTS
1 Scope
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 configuratio
...