WIND STN
Wind generating station
A wind generating station is a system-level representation of a documented wind-generation facility.
SLD / Schematic
Symbols · WTG T1
Fixed-speed wind turbine generator (Type 1)
A wind turbine whose squirrel-cage induction generator connects to the network directly, running at nearly constant speed.
In plain English
What does Fixed-speed wind turbine generator (Type 1) mean?
This symbol marks a Type 1 wind turbine: a rotor-driven squirrel-cage induction generator whose stator connects to the collector network through a soft starter and a step-up transformer, with no power converter in the main path. Speed varies only by the generator slip, typically one or two per cent, so the turbine is described as fixed-speed.
A simple example
On a single-line diagram it is usually drawn as a blade or rotor glyph coupled to a generator circle marked for an induction machine, followed by the soft starter, switched capacitor steps for reactive power and the pad-mount or nacelle transformer. Older wind farms and small community turbines are the main places it still appears.
What the drawings help you do
The symbol does not state the reactive demand of the generator, the capacitor step sizes or how the turbine behaves during voltage dips. Those values come from the turbine data sheet and the grid connection study, because an induction generator draws magnetising current from the network rather than supplying it.
This particular reference
A wind turbine whose squirrel-cage induction generator connects to the network directly, running at nearly constant speed. A Type 1 turbine has no converter in the power path; a Type 3 or Type 4 turbine shows a converter that sets speed and reactive output.
- Winding
- A coil of conductor inside an electrical machine or transformer.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Terminal
- An identified point where a conductor connects.
Read the source: AutoCAD Electrical: Power station and substation concepts · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
SLD · WTG T1
What it represents
This symbol marks a Type 1 wind turbine: a rotor-driven squirrel-cage induction generator whose stator connects to the collector network through a soft starter and a step-up transformer, with no power converter in the main path. Speed varies only by the generator slip, typically one or two per cent, so the turbine is described as fixed-speed.
On a single-line diagram it is usually drawn as a blade or rotor glyph coupled to a generator circle marked for an induction machine, followed by the soft starter, switched capacitor steps for reactive power and the pad-mount or nacelle transformer. Older wind farms and small community turbines are the main places it still appears.
The symbol does not state the reactive demand of the generator, the capacitor step sizes or how the turbine behaves during voltage dips. Those values come from the turbine data sheet and the grid connection study, because an induction generator draws magnetising current from the network rather than supplying it.
How to read it
- Look for shunt capacitor steps beside the generator; they supply the reactive power the induction machine absorbs.
- A soft starter or thyristor bypass shown in series is for connection inrush only, not for speed control.
Information to show or reference
- State generator rating, voltage and slip range.
- Show soft starter and capacitor compensation steps.
- Reference the turbine step-up transformer and collector feeder.
A distinction that matters
A Type 1 turbine has no converter in the power path; a Type 3 or Type 4 turbine shows a converter that sets speed and reactive output.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Power station and substation concepts
Public wind generating station representation used as the site-level context for turbine symbols.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context for rotating machines; no reproduced artwork.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
Explore related references
G 3~ ASG
Three-phase induction generator
A squirrel-cage asynchronous machine driven above synchronous speed so that it delivers power into a three-phase network.
SLD / Schematic
WTG T2
Variable-slip wind turbine generator (Type 2)
A wind turbine using a wound-rotor induction generator with controlled external rotor resistance to widen the slip range.
SLD / Schematic
CAP 3PH
Three-phase power-factor capacitor
A three-phase capacitor assembly provides a documented reactive-power function connected to the power circuit.
SLD / Schematic
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.