Developing a Power Quality Advanced Monitoring System

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"By combining the benefits of the NI PXI, CompactRIO, FPGA, and processor, we developed a rugged and specialized educational system that helps us train students and introduce them in power quality monitoring systems."

- Ashot Minasyan, Bitlis-MEN LLC

The Challenge:
Designing a laboratory facility for the hands-on study of power quality and power consumption control methods in single-phase and three-phase power networks, which are also used for monitoring power quality in the power distribution network and monitoring consumer power consumption rates.

The Solution:
Creating the power quality advanced monitoring system with three-phase RMS analysis; voltage dips, swells, and interruptions analysis; THD and load impedance calculation analysis; harmonics (up to the 64th order) and interharmonics (0.5 to 63.5th order) analysis; active, reactive, and apparent power analysis; power factor analysis; voltage and current unbalance for the power system; power supply vector diagrams; and flicker analysis. In addition, we have created the power network simulator to generate different power networks with different anomalies and faults that can be connected to the power quality advanced monitoring system.

Author(s):
Ashot Minasyan - Find this author in the NI Developer Community

Bitlis-MEN LLC, an NI Silver Alliance Partner, offers safe and simple engineering solutions for the automation of customers’ systems. We can provide customers with ease of operation, and they can see and manage their businesses anytime and anywhere—from home, the office, or while travelling. Our experience, competence, and the innovations and advanced technologies we use help us meet the needs of our clients all over the world. We can also provide a partial automation of the system, namely the automation of the assemblies and units.

System Design

The system can be operated as a stand-alone device, in conjunction with a personal computer with monitor or with a PXI based network simulator. Besides being a training facility for hands-on study, the system can be used as a smart meter for all kinds of electrical measurements on three-phase power networks.

Analysis  

  • Three-phase RMS (voltage and I) (IEC 61000-4-30:2008)
  • Voltage dips, swells, and interruptions (IEC 61000-4-30:2008; EN50160:2007)
  • THD (total harmonic distortions) (IEC 61000-4-7:2002; EN50160:2007)
  • Load impedance calculation
  • Harmonics (up to 64th order) and interharmonics (0.5 to 63.5th order) (IEC 61000-4-7:2002)
  • Harmonics per second and per cycle (IEC 61000-4-7:2002)
  • Active power harmonics
  • Active, reactive, and apparent power
  • Power factor
  • Voltage and current unbalance for power system (IEC 61000-4-30:2008)
  • Power Supply vector diagrams
  • Flicker (IEC 61000-4-15:2010)
  • Frequency (IEC 61000-4-30:2008)

List of Experiments

  • Active resistance in AC circuits
  • Inductance in AC circuits
  • Capacitance in AC circuits
  • Resistance, inductance, and capacitance connected in series in AC circuits
  • Resistance, inductance, and capacitance connected in parallel in AC circuits
  • The reactive load compensation of power consumers
  • Three-phase circuits with the star connection of consumers
  • Emergency situation analysis in three-phase circuits with the star connection of consumers
  • Three-phase circuits with the delta connection of consumers
  • Emergency situation analysis in three-phase circuits with the delta connection of consumers

System Features and Benefits

  • 10 experimental works on power quality monitoring and control
  • Menu-driven navigation through the labs
  • Visual representation of experimental results

Conclusion

By combining the benefits of the NI PXI, CompactRIO, FPGA, and processor, we developed a rugged and specialized educational system that helps us train students and introduce them in power quality monitoring systems. We successfully installed the power quality advanced monitoring system at the Automation Micro processors Department of Electrical Engineering Faculty at the Perm National Research Polytechnic University in Russia, the Moscow Institute of Steel and Alloys (MISiS) in Russia, and the Armenian National Engineering Laboratory (ANEL) at the State Engineering University of Armenia (SEUA).

A National Instruments Alliance Partner is a business entity independent from National Instruments and has no agency, partnership, or joint-venture relationship with National Instruments.

Author Information:
Ashot Minasyan
Find this author in the NI Developer Community

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