IEC 60076-16:2018 pdf download

IEC 60076-16:2018 pdf download.Power transformers – Part 16: Transformers for wind turbine applications
1 Scope
This part of IEC 60076 applies to dry-type and liquid-immersed transformers for wind turbine step-up applications having a winding with highest voltage for equipment up to and including 72,5 kV. This document applies to the transformer used to connect the wind turbine generator to the wind farm power collection system or adjacent distribution network and not the transformer used to connect several wind turbines to a distribution or transmission network. Transformers covered by this document comply with the relevant requirements prescribed in the IEC 60076 standards or IEEE C57 standards.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 2.1 IEC references IEC 60076-1 , Power transformers – Part 1: General IEC 60076-2, Power transformers – Part 2: Temperature rise for liquid-immersed transformers IEC 60076-3, Power transformers – Part 3: Insulation levels, dielectric tests and external clearances in air IEC 60076-5, Power transformers – Part 5: Ability to withstand short circuit IEC 60076-7, Power transformers – Part 7: Loading guide for mineral-oil-immersed power transformers IEC 60076-1 1 , Power transformers – Part 11: Dry-type transformers IEC 60076-1 2, Power transformers – Part 12: Loading guide for dry-type power transformers IEC 60076-1 4, Power transformers – Part 14: Liquid-immersed power transformers using high-temperature insulating materials IEC 61 378-1 , Converter transformers – Part 1: Transformers for industrial applications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1 wind turbine transformer generator step up transformer connecting the wind turbine to the power collection system of the wind farm or the adjacent distribution network for single turbine installations 3.2 tower supporting structure of the wind turbine on top of which the nacelle with generator and other equipment is located 3.3 nacelle housing that contains the drive-train and other elements on top of a horizontal-axis wind turbine tower [SOURCE: IEC 60050-41 5:1 999, 41 5-01 -07] 3.4 effective cooling medium ambient air, either internal or external to the tower or nacelle, or cooling water that comes into contact with the cooling surface of the transformer 3.5 compartmentalized type transformer transformer with integral enclosure comprised of multiple independent compartments, usually with separate entrances into the HV and LV termination compartments 3.6 sealed transformer transformer which is so constructed that the external atmosphere is not intended to gain access to the interior 3.7 routine sample test test which is usually defined as a type test or special test but carried out as an additional routine test on a random sample of transformers
4 Use of normative references
This standard can be used with either the IEC or IEEE normative references but the references shall not be mixed. The purchaser shall include in the enquiry and order which normative references are to be used. If the choice of normative references is not specified, then IEC standards shall be used except for wind turbine transformers intended for installation in North America where IEEE standards shall be used.
6 Service conditions
6.1 Normal service conditions 6.1.1 General The normal service conditions detailed in IEC 60076-1 or IEEE Std C57.1 2.00 for liquid-immersed transformers or the normal service conditions in IEC 60076-1 1 or IEEE Std C57.1 2.01 for dry-type transformers shall apply unless otherwise stated in this document or specified by the purchaser. 6.1.2 Temperature of external cooling medium If the transformer is installed external to the tower or nacelle, the normal conditions specified in IEC 60076-1 or IEEE Std C57.1 2.00 for liquid-immersed transformers and IEC 60076-1 1 or IEEE Std C57.1 2.01 for dry-type transformers shall apply, unless otherwise specified. If the transformer is installed within the tower or nacelle then particular conditions apply as shown in 6.2.