Real-Time Monitoring, Operation and Control of Laboratory Test-Bed Micro Power System

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Overview:

  • This paper presents the application created to synchronize generators connected to the test bed power system, as well as the real-time controlling and monitoring of the generators  and buses.
  • The control strategy for the proper synchronization of the generators on the test bed is done by an algorithm created in LabView, in which a compatible GUI was created for the operator to monitor and control the power system in real-time.
  • The system uses several different Data Acquisition units (DAQs) to gather voltage and current waveforms from corresponding transducers, which allows calculations of power, frequency, true RMS/ amplitude/phasor and vectors of positive, negative and zero sequences, at each point of observation in our power system.
  • With the ability to read data in a real-time format, alongside with a graphical user interface, this allows not only the power system test bed to synchronize generators automatically, but also to set the power output of each generation station, while giving the user the ability to control and monitor the behavior of the power system on both the generation and load side.

System Description:

  • The developed power system uses several power generation stations as a small scaled model of conventional power plants which can model different types of slack and PV buses.
  • In order to model transmission lines and cables, the line model has been built using series resistors and reactors with parallel capacitors to represent the pi model of a realistic transmission line.
  • Power system passive and dynamic loads have been implemented by constant impedance loads and induction motor loads

Single Line Power System Toplogy

Single Line Power System Topology

 

 

 

Hardware Setup:

 

Generation Control Front Panel:

  • The developed Generation Control Front Panel contains commands to control generation stations as well as monitor generation power output.

Generation Control Front Panel

 

 

 

Switching and Load Control Front panel:

  • The developed Switching and Load Control Front Panel contains commands to close solid state relays throughout the system.
  • Variable loads can also be added and increased from the Switching and Load Control front panel.

Switching and Load Control Front Panel

 

Experimental results:

  • The Test-Bed Micro Power System has four synchronized generation stations, with small resistive loads connected to the system.
  • Four steps of load change is added to the system, all increments are at a rated 300 W to the system.

Switching and Load Control Front Panel

  • Active power from  Generators 2, 3, and 4 are increased to compensate for the active power generated in Generator 1.

Behavior of Generation Control Front Panel under Load Operation

 

 

Total Power Generation Waveform for Generators Under Torque Control

 

Individual Active Power Generation Behavior with step load change and Power Compensation for Generator 1

 

 

0040 Feeder A Software Analysis

 

 

0040A Feeder A Fluke 435 Analysis

Conclusion:

  • The calculated results were proven by means of certified measurement devices.
  • The system was tested for power generation synchronization,  load change, and ability to add power from the generation stations to the system.
  • Construction and implementation of a small-scale power system test-bed has been done, which has the different capabilities for experimental research and educational purposes. By having this kind of power system, engineers and researchers are capable to implement their own idea about power system phenomenon in a practical way.
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