Course detail
The power quality and EMC
FEKT-LPQ1Acad. year: 2010/2011
The power quality is characterized by the steady-state nominal frequency sine wave of voltage, which is symmetrical in the three-phase supply network. The power quality depends on a quality of the electrical power generation, the quality of the transmission and the distribution and on the quality of electrical power consumption as well. Backward disturbing influences of the individual power system components and their compatibility and cooperation in an industrial and distribution supply networks are the content of this course. The principles of the disturbance are demonstrated at practical examples.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Learning outcomes of the course unit
Prerequisites
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Course curriculum
The fundamental Czech, Europe and international legislative.
Distribution of the disturbance types; summary of backward disturbing influences of electrical appliances to the supply network.
The harmonic distortion of current wave shape; definition; sources; calculations and measurements.
Harmonic components propagation; frequency response characteristics of power networks.
Influence of harmonic distortion of the current to power lines and power transformers loading and sizing.
Influence of harmonic distortion of the current to fuses, circuit breakers and measurement devices function.
The voltage distortion and asymmetry.
The line voltage fluctuation; definition; determination of limit values.
Voltage dips, overvoltages and short supply interruptions.
Low frequency connected disturbances propagation.
Influence of static and dynamic variation in voltage to electrical appliances.
Power network analyzers and power disturbance measurement.
Work placements
Aims
Specification of controlled education, way of implementation and compensation for absences
Recommended optional programme components
Prerequisites and corequisites
Basic literature
Kůs, V. Vliv polovodičových měničů na napájecí soustavu. BEN, Praha 2002, 184 stran, ISBN 80-7300-062-8 (CS)
Recommended reading
Classification of course in study plans
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
The fundamental Czech, Europe and international legislative.
Distribution of the disturbance types; summary of backward disturbing influences of electrical appliances to the supply network.
The harmonic distortion of current wave shape; definition; sources; calculations and measurements.
Harmonic components propagation; frequency response characteristics of power networks.
Influence of harmonic distortion of the current to power lines and power transformers loading and sizing.
Influence of harmonic distortion of the current to fuses, circuit breakers and measurement devices function.
The voltage distortion and asymmetry.
The line voltage fluctuation; definition; determination of limit values.
Voltage dips, overvoltages and short supply interruptions.
Low frequency connected disturbances propagation.
Influence of static and dynamic variation in voltage to electrical appliances.
Power network analyzers and power disturbance measurement.
Fundamentals seminar
Teacher / Lecturer
Syllabus
Test.
Exercise in computer lab
Teacher / Lecturer
Syllabus
Comprehensive power networks simulation.
Laboratory exercise
Teacher / Lecturer
Syllabus
Power consumption characteristics measurement.
Test of harmonic components summation.
Summation of distorted currents in a neutral wire.
Measurement on a LC power factor correction bank.
Load sensitivity to voltage dips and short supply interruptions.
Lamps flickering caused by voltage fluctuation.
Voltage unbalance and harmonic distortion influence on induction machine operation.
Influence of an aggregation interval duration on RMS voltage statistical evaluation process
Voltage characteristics measurement and evaluation.