IEC 62116-2014 pdf – Utility-interconnected photovoltaic inverters – Test procedure of islanding prevention measures.
1 Scope The purpose of this International Standard is to provide a test procedure to evaluate the performance of islanding prevention measures used with utility-interconnected PV systems. This standard describes a guideline for testing the performance of automatic islanding prevention measures installed in or with single or multi-phase utility interactive PV inverters connected to the utility grid. The test procedure and criteria described are minimum requirements that will allow repeatability. Additional requirements or more stringent criteria may be specified if demonstrable risk can be shown. Inverters and other devices meeting the requirements of this standard are considered non-islanding as defined in IEC 61 727. This standard may be applied to other types of utility-interconnected systems (e.g. inverter- based microturbine and fuel cells, induction and synchronous machines). However, technical review may be necessary for other than inverter-based PV systems. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC/TS 61 836, Solar photovoltaic energy systems – Terms, definitions and symbols 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61 836 as well as the following apply. 3.1 PV array simulator DC power source used to simulate PV array output 3.2 EUT equipment under test inverter or anti-islanding device on which these tests are performed Note 1 to entry: This note applies to the French language only. 3.3 MPPT maximum power point tracking PV array control strategy used to maximize the output of the system under the prevailing conditions Note 1 to entry: This note applies to the French language only.
3.4 non-islanding inverter inverter that will cease to energize a utility distribution system that is out of the nominal operation specifications for voltage and/or frequency [SOURCE: IEC 61 727:2004, 3.8.1 ] 3.5 island state in which a portion of the electric utility grid, containing load and generation, continues to operate isolated from the rest of the grid Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned. 3.6 intentional island island that is intentionally created, usually to restore or maintain power to a section of the utility grid affected by a fault Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned, but there is an implicit or explicit agreement between the controlling utility and the operators of customer-owned generation for this situation.
3.9 stopping signal signal provided by the inverter indicating it has ceased energizing its utility grid-connected output terminals SEE: Annex C. 3.1 0 unintentional island islanding condition in which the generation within the island that is supposed to cease energizing the utility grid instead continues to energize the utility grid 4 Testing circuit The testing circuit shown in Figure 1 shall be employed. Similar circuits shall be used for three-phase output. Parameters to be measured are shown in Table 1 and Figure 1 . Parameters to be recorded in the test report are discussed in Clause 7.