IEC TS 63217 pdf – Utility-interconnected photovoltaic inverters – Test procedure for over voltage ride-through measurements
1Scope
This document provides a test procedure for evaluating the performance of Over VoltageRide-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 utilityhigh voltage (HV) distribution systems. However, the applicable procedures may also be usedfor low voltage (LV) installations in locations where evolving OVRT requirements include suchinstallations, e.g. single-phase or 3-phase systems.
Fundamentally, the assessed OVRT performance is valid only for the specific configurationand operational mode of the inverter’ under test. Separate assessment’is required for theinverter in other factory or user-settable configurations，as these may cause’ the inverteroVRT response to behave differently.
The measurementprocedures are designed to be as non-site-specific as possible,so thatOVRT 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 beuseful for testing of a complete PV power plant consisting of multiple inverters connected at a
single point to the utility grid. lt further provides a basis for utility-interconnected PV invertersnumerical simulation and model validation.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references，only the editioncited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 61400-21-1:2019, Wind energy generation systems – Part 21-1: Measurement andassessment of electrical characteristics – Wind turbines
IEC TS 61836:2016,Solar photovoltaic energy systems -Terms,definitions and symbols
IEC TS 63106-1:2020, Simulators used for testingof photovoltaic power conversionequipment – Recommendations – Part 1:AC power simulators
IEC TS 63106-2:2022, Simulators used for testingof photovoltaic power conversionequipment – Recommendations – Part 2: DC power simulators
3Terms，definitions,symbols and abbreviated terms
For the purposes of this document,the terms,definitions，symbols and abbreviated tems inIEC TS 61836 and the following apply.
lSO and lEC maintain terminological databases for use in standardization at the followingaddresses:
. IEC Electropedia: available at http://www.electropedia.orgl
Iso Online browsing platform: available at http://www.iso.org/obp3.1 Terms, definitions and symbols
3.1.1
over voltage ride-throughoVRT
capability of an inverter to continue generating power to connected utility grid during a limitedduration voltage swell (see 3.1.28) of grid voltage
3.1.2
utility grid
grid for which an electrical utility is responsible[SOURCE: IEC TS 61836:2016,3.3.29.2]
3.1.3
tap-changer
apparatus or accessory for usually automatically changing transformer taps to regulatesystem voltage
3.1.4
inverter
electric energy converter that changes direct electric current to single-phase or polyphasealternating currents
[SOURCE:IEC TS 61836:2016,3.2.15]
3.1.5
equipment under testEUT
equipment on which these tests are performed and refers to the utility-interconnected PVinverter
3.1.6NEur
access point of the EUT during the test
3.1.7
Pn
rated power of EUT