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On-line Method for Identifying Harmonic Sources in Power Systems  Himanshu Jain Advised by Prof. Robert Cox University of North Carolina, Charlotte
Problem Description ,[object Object],[object Object]
Problem Description ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object]
Harmonic Sources ,[object Object],[object Object],[object Object]
Quantifying Harmonics ,[object Object],[object Object],[object Object]
Coupling ,[object Object],[object Object]
Example ,[object Object],[object Object],[object Object],Current harmonics for heater Current harmonics for rectifer Harmonic Number Current w/ Rectifier in Parallel  (A RMS) Current w/o Rectifier in Parallel  (A RMS) 1 st 6.6 6.7 3 rd   0.1 0 5 th 0.1 0 7 th 0.1 0 Harmonic Number Current w/ Heater in Parallel  (A RMS) Current w/o Heater in Parallel  (A RMS) 1 st 1.1 1.3 3 rd   0.9 1.2 5 th 0.6 0.9 7 th 0.3 0.6
Potential Solutions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Proposed Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Smart Meters ,[object Object],[object Object]
NILM Overview
Transient-Based Identification ,[object Object]
Load Identification ,[object Object]
Proposed Approach ,[object Object],[object Object]
Impedance Estimation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],If  ω inj  ≠  ω s
Our Approach ,[object Object],[object Object],[object Object]
Our Approach and Results ,[object Object],[object Object],[object Object]
Model Identification ,[object Object],[object Object],[object Object],[object Object]
Model Identification of Non-linear load ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simulation ,[object Object],[object Object]
Simulation ,[object Object]
Experimental Setup ,[object Object],[object Object],[object Object]
Current Plots  Heater Current  Total Current  Rectifier Current
Model Validation ,[object Object],[object Object],[object Object],Test 1 Test 2 Harmonic Number Simulated Current (A rms) Measured Current (A rms) 1 st 1.3 1.3 3 rd 1.2 1.2 5 th 1.0 0.9 7 th 0.7 0.6 Harmonic Number Simulated Current (A rms) Measured Current (A rms) 1 st 1.2 1.2 3 rd 1.0 1.0 5 th 0.6 0.6 7 th 0.3 0.3
Experimental Measurements ,[object Object],Harmonic Number Current w/o Heater (A rms) Current w/ Heater (A rms) 1 st 1.3 1.1 3 rd 1.2 0.9 5 th 0.9 0.6 7 th 0.6 0.3
Experimental Measurements ,[object Object],[object Object],[object Object],[object Object],Harmonic Number Simulated Current (A rms) Measured Current (A rms) 1 st 1.3 1.1 3 rd 1.2 0.9 5 th 1.0 0.6 7 th 0.7 0.3
Conclusion and Future Work ,[object Object],[object Object],[object Object]
Thank You!
Linear load v/s Non Linear load ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Presentation

  • 1. On-line Method for Identifying Harmonic Sources in Power Systems Himanshu Jain Advised by Prof. Robert Cox University of North Carolina, Charlotte
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  • 24. Current Plots Heater Current Total Current Rectifier Current
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Hinweis der Redaktion

  1. Hello My name is Prayag Parikh. I am a Master’s student at University of North Carolina at charlotte. Topic of my today’s presentation is diagnostics and prognostics for multiple induction machines using a single set of current transducers. It is a part of my thesis. During this project I was helped by Rebecca, Arun and Jason. My work in this project was guided by my adviser Dr. Robert Cox.
  2. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  3. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  4. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  5. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  6. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  7. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  8. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  9. Induction machines are the work horses of modern commercial and industrial applications. Induction machines are everywhere, in commercial-industrial buildings, power plants ,shipboards and air-plane. Failure of critical induction machine can cost millions of dollars in terms of cost of maintenance and lost of revenue. In some cases failure of induction machine can also jeopardize the safety of personals working on the floor.
  10. Figure shows the block diagram of standard NILM. Typical installation location includes switchboards and motor control centers. From the block diagram it can be seen that NILM measures line voltages and aggregate current going to a bank of loads. Here data acquisition module converts analog data in to digital form with the help of 12bit A-to-D converter. Preprocessor uses these raw current and voltage data to get the active and reactive component of current. Event classifier uses preprocessed data to disaggregate individual load from the aggregate current data. Diagnostic and systems manangement module produces useful statistics for the operator, which can be used to analyze the health of different loads. Further slides will describe each block of NILM in detail.
  11. Currently NILM is monitoring aggregate power flowing to loads of US Navy’s DDG-51 Land based engineering site. This site is a mock-up of no. 2 main engine room aboard a DDG-51 class destroyer. This site includes Low pressure air compressors for pneumatic valve actuation and tool operations. Figure shows the power drawn at one of the switchboards serving the DDG-51 Land based Engineering site. The beginning of each LPAC load interval has been shown with a circle. In this system compressor is running continuously, whenever receiver tank needs to be pressurized compressor is loaded and it consumes more power. Once the tank is properly pressurized compressor is unloaded and it consumes less power. Currently NILM logging load and unload intervals.