The Computer Controlled Wind Power Plants Application with Induction Generator, “AEL-WPPIC”, has been designed for the study of the main characteristics and behavior of the induction generators used in wind turbines which inject the generated power into the grid.

The “AEL-WPPIC” application allows the user to become familiar with the electrical scheme and the operating characteristics of wind turbines which use squirrel cage rotor three-phase generators in wind power plants connected to the main grid. For this, the application includes a squirrel cage induction generator coupled to a three-phase motor (turbine), whose speed is controlled through a variable frequency drive


This allows simulating different wind conditions and the drive train of a wind turbine. This application also includes a module with a multifunction digital controller for the automatic control of the turbine-generator group electrical parameters and speed, as well as for the carrying out the automatic synchronization process of the three-phase induction generator with the grid. This control module is at the same time an advanced protection for generators and turbines. It meets the ANSI standards regarding the protection parameters for generators and turbines (ANSI 81O, ANSI 81U, ANSI 59, ANSI 27, ANSI 50/51, ANSI 32R/F, ANSI IOP 32, ANSI MOP 32, ANSI 46, Voltage Asymmetry, Generator Ground Fault, Phase Rotation, ANSI IEC 255 , Generator Lagging Power Factor, among others). In addition, it is included a three-phase capacitors bank which will generate the required reactive energy so that the induction generator do not consume it from the grid and a network analyzer to monitor the generation electrical parameters.

On the other hand, the essential part of this application is the Energy Manager and Data Acquisition Software, “EMG-SCADA”. This tool allows the user to carry out remotely the control and automatic synchronization maneuvers with the turbine-generator group and at the same time to monitor every curves of the generator electrical parameters, watch the voltage dips, the energy losses and voltage drops. Moreover, it allows saving all the acquired data to watch and compare it later. It is possible to see clearly and with accuracy the effects of reactive power compensation on the monitored power curves, maximum and minimum energy demand, load unbalances and the variation of the power factor. But the functionality of this software does not end here, the EMG-SCADA allows carrying out the simulation of pre-configured wind curves for a real time or later analysis of the induction generator response. In this way, the user will be able to obtain and analyze the speed and power curves of the simulated wind turbine regarding the pre-configured values, for an in-depth study of this type of wind power plants.

To acquire more experience in the study of wind turbines with three-phase squirrel cage generators, it is recommended to acquire the modules of resistors and inductances oriented to the study of the island operation of the three-phase induction generator and the manual compensation of the reactive power consumed by it. In addition, the analog instrumentation module for the measurement of the most relevant electrical parameters of the generator (P, Q, V, f) is also recommended.

This Computer Controlled Unit is supplied with the SOHAIL CORPORATIONS Computer Control System (SCADA), and includes: The unit itself + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.



  1. Startup of the induction generator.
  2. Automatic control of the turbine-generator group speed.
  3. Automatic synchronization of the three-phase induction generator with the grid.
  4. Monitoring the three-phase induction generator electrical parameters (P, Q, S, PF).
  5. Control of the active power injected into the grid.
  6. Influence of the speed variation on the active power and analysis of the feasible solutions to automate the power factor regulation.
  7. Compensation of the reactive power by means of capacitor banks.
  8. Remote automatic control of the turbine-generator group.
  9. Real time monitoring of frequency, current and voltage values and waveforms.
  10. Real time monitoring of the active, reactive and apparent powers.
  11. Visualization of the curves for the measured values as a function of time.
  12. Visualization of the phasor diagrams of the generator electrical parameters.
  13. Customized programming of the wind speed curves.
  14. Simulation of the wind speed curves for a wind turbine with three-phase induction generators.
  15. Visualization of the power curve for the pre-configured wind speed values.
  16. Real time monitoring of the obtained results.
  17. Storage and comparison of the obtained results.


Practical possibilities with the recommended elements:

  1. Island operation of the three-phase induction generator.
  2. Study of the generation and demand in isolated systems.
  3. Measurement of the electrical parameters of the generator (P, Q, V, f) by analog instrumentation.

Other possibilities to be done with this unit:

  1. Many students view results simultaneously. To view all results in real time in the classroom by means of a projector or an electronic whiteboard.
  2. The Computer Control System with SCADA allows a real industrial simulation.
  3. This unit is totally safe as uses mechanical, electrical/electronic, and software safety devices.
  4. This unit can be used for doing applied research.
  5. This unit can be used for giving training courses to Industries even to other Technical Education Institutions.
  6. Control of the AEL-WPPIC unit process through the control interface box without the computer.
  7. Visualization of all the sensors values used in the AEL-WPPIC unit process.
  8. Several other exercises can be done and designed by the user.


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