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Wind Turbine Generator Software


Wind Turbine Generator Analysis and Calculation Software
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  Wind Energy Generation Analysis Program

Wind Turbine Generator Analysis program allows you to model wind farm operation with grid connection via a highly flexible graphic interface optimized for both steady-state and dynamic simulation. Wind Turbine Generator module is part of the ETAP Renewable Energy solution and is fully compatible with ETAP User-Defined Dynamic Model Builder and Complier.

Wind Turbine Generator models fully integrated with all ETAP calculation modules such as Load Flow, Short circuit, Transient Stability, Harmonic Analysis, Protective Device Coordination, and ETAP Real-Time. User-defined actions may be added to simulate wind turbine and grid transient recovery variations and relay operations. It also predicts the dynamic response of each individual wind turbine generator.

Wind power analysis software results may be utilized for analyzing alternative turbine placement, tuning of control parameters, selection and placement of protective devices, and sizing associated equipment.

Wind turbine analysis software module comes to market with proven utility. Wind farm analysis software is currently being used for real-time monitoring of power exchange between wind turbines and the power grid at the third largest wind farm in the United States.

With high wind penetration levels being planned globally, the need for grid operators to quickly assess the impacts of wind generation on system stability has become critical. In the planning phase, this assessment is normally done with positive sequence time-domain analysis, which allows for a simulation of the dynamic response of a power system to major disturbances (e.g., short circuits). The lack of suitable dynamic models for the wide variety of wind turbines available in the marketplace has been an obstacle in performing accurate analyses of this type, though efforts led by the Western Electricity Coordinating Council (WECC) to develop industry-standard wind turbine models are addressing this issue.

WECC Modeling & Validation Working Group initiated an effort to develop and validate a series of generic dynamic models for wind turbine generators (WTG). The objectives of this effort were to:

1) Allow for the performance of transient stability studies in the early stages of the interconnection process when WTG manufacturer / model may be undetermined
2) Reduce WTG manufacturer confidentiality concerns with respect to proprietary aspects of dynamic models
3) Improve the quality and usability of models, consistent with the level of accuracy expected in an initial system impact evaluation.

ETAP includes wind turbine models developed by the WECC Modeling & Validation Working Group. These models were developed for analyzing the stability impact of large arrays of wind turbines with a single point of network interconnection. Dynamic simulations have been performed with these models, and comparisons made with results derived from higher-order models used in manufacturer-specific representations of aero conversion and drivetrain dynamics.

Wind Turbine Generator Type 1
Wind Turbine Generator Type 2
Wind Turbine Generator Type 3
Wind Turbine Generator Type 4

Generic WECC models were  developed for four major WTG topologies. The first topology, is referred to as a Type 1 WTG. This machine is pitch-regulated, and drives a squirrel cage induction generator which is directly coupled to the grid.

Type 2 WTG is a variation on the Type 1, operating with variable slip. It utilizes a wound rotor induction generator whose rotor winding is brought out via slip rings and brushes. An external rotor resistance is electronically modulated to effect dynamic changes in the machine’s torque-speed characteristics.

The doubly fed induction generator (DFIG), or partial conversion, topology is designated as WECC Type 3. The turbine is pitch-regulated and features a wound rotor induction generator with an AC/DC/AC power converter connected between the rotor terminals and grid. The generator stator winding is directly coupled to the grid. The power converter in the rotor circuit allows for independent control of generator torque and flux, providing fast active and reactive power control over a wide range of generator speeds.

Finally, the full conversion topology is designated as WECC Type 4. The turbine is pitch-regulated and features an AC/DC/AC power converter through which the entire power of the generator is processed. The generator may be either induction or synchronous type. As with the Type 3 WTG, the power converter allows for independent control of quadrature and direct axis output currents at the grid interface, providing fast active and reactive power control over a wide range of generator speeds.


Finally for a detailed simulation, ETAP User-Defined Dynamic Model Builder may be used to simulate actual manufacturer wind turbine controller models and used for dynamic calculations using ETAP Transient Stability program.


Wind Turbine Generator Analysis Program Key Features


  • The Wind Energy Analysis module gives you the ability to model unlimited wind turbine generators individually or in groups
  • Detailed modeling of turbine dynamics including aerodynamics & power coefficients
  • Fully integrated with ETAP User-Defined Dynamic Model (UDM) Builder and Compiler
  • Model wind turbine technologies defined by WECC such as conventional induction generator, variable slip induction generator, doubly-fed induction generators with pitch & converter controller characteristics and full scale power converter models.
  • Simulate transient wind conditions with ramp, gust, & noise disturbances & calculate dynamic impact on wind machines
  • Create multiple wind categories for predictive “what if” studies & scenarios
  • User-defined wind turbine manufacturer and model library
  • Perform transient stability analysis with individual or zone-based disturbances