EN IEC 60034-3-2020 pdf download.Rotating electrical machines – Part 3: Specific requirements for synchronous generators driven by steam turbines or combustion gas turbines and for synchronous compensators (IEC 60034-3:2020).
This part of IEC 60034 applies to large three-phase synchronous generators, having rated outputs of 10 MVA and above driven by steam turbines or combustion gas turbines. Also included are synchronous Mvar compensators of the same output range connected to a grid for the purpose of exchanging reactive power.
This document supplements basic requirements for rotating machines given in IEC 60034-1.
Common requirements are specified together with specific requirements for air, hydrogen or liquid cooled synchronous generators or compensators.
This document also gives the precautions to be taken when using hydrogen cooled generators including:
• rotating exciters driven by synchronous generators;
• auxiliary equipment needed for operating the generators;
• parts of the building where hydrogen might accumulate.
These requirements also apply to a synchronous generator driven by both a steam turbine and a combustion gas turbine as part of a single shaft combined cycle unit.
These requirements do not apply to synchronous generators driven by water (hydraulic) turbines or wind turbines.
NOTE The precautions taken when using hydrogen are valid for all cases where hydrogen is used as a coolant.
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.
lEO 60034-1:2017, Rotating electrical machines — Part 1: Rating and performance
IEC 60034-4-1, Rotating electrical machines — Part 4-1: Methods for determining electrically excited synchronous machine quantities from tests
IEC 60045-1, Steam turbines — Part 1: Specifications
IEC 60079 (all parts), Explosive atmospheres
IEC 60085, Electrical insulation — Thermal evaluation and designation
— 8 — IEC 60034-3:2020 © IEC 2020
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60034-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http:Ilwww.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 grid
public electrical network or local (e.g. industrial) network, which is connected to the generator or compensator either directly or through a transformer
3.2 synchronous generator
large synchronous machine driven by steam or gas turbines which converts mechanical energy into electrical energy and supplies it to an electrical grid
Note I to entry: Generators can also provide reactive power to the grid. The driving unit Itself or additional equipment is used to start up the generating unit,
3.3 synchronous compensator
large synchronous machine electrically coupled to the grid but not exchanging mechanical energy through the shaft during steady state operation
Note 1 to entry: Reactive power is supplied to the grid or imported to the compensator by means of adjusting the field current,
Note 2 to entry: The losses are covered by the grld A compensator needs a start-up device, which accelerates the unit to operating speed or can be started asynchronously if design is appropriate.
Note 3 to entry: Synchronous compensators are commonly named synchronous condensers.
3.4 mechanical start
change in speed from zero or turning gear speed to rated speed
3.5 turning gear operation
rotation at low speed to avoid undesirable bending of turbine- and/or generator/compensatorrotors due to uneven circumferential temperature distribution 4 General.EN IEC 60034-3 pdf download.