Pq 1stlevel M2 Curriculum

Power Quality Training Courses

Harmonics and Interharmonics

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LPQIVES is a programme of:

LPQI is part of:

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Module 2 Harmonics and Interharmonics

1 INTRODUCTION Two sources of voltage and current distortion are dealt with in this seminar: harmonics (mainly) and interharmonics. Their sources and effects, as well as possible methods of their mitigation and measuring are presented.

1.1 General aims The seminar participant should obtain information on the theoretical background of the distorted signals analysis, sources of distortion with special regard to power electronic systems, effects of distorted voltages and currents, methods for location of distortion sources in a power system, distortion reduction methods, measurement principles, standardization, formulating contacts, etc. Most of the lecture subject will be supplemented with laboratory experiments and exemplified by analysis of real cases.

1.2 Target groups This module’s target group are mainly: − end-users of equipment; − designers; − installers or contractor of installations; − electric networks operators; − equipment sellers and services providers in the electricity sector.

2 SPECIFIC AIMS AND TOPICS The pathway of learning consists of a 2 days course, subdivided in sections (with different duration), with these contents and related aims. 1st day Contents

Aims

Contents

Aims

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Voltage & current harmonics Power theories in electrical circuits Passive filters of high harmonics Supplying knowledge concerning basics of distorted signals analysis, sources of distortion, with special regard to power electronic systems, effects of distorted voltages and currents, methods of locating distortion sources in a power system, passive methods for harmonics mitigation 2nd day Active power filter Interharmonics Harmonic measurements Standardization Neutral line and transformer sizing in the environment of distorted current and voltages Case studies (laboratory) Contract Supplying knowledge concerning principles of measuring, standardization, formulating contracts. Use of the obtained knowledge to analysis and solving problems in harmonics, as well as to practical measurements in laboratory.

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Below there’s a detailed overview of the course contents. 2.1 Pathway of learning flow chart

Time progression (hours)

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COURSE DETAILED PROGRAM

First day: 60 mins

Participants registration

5 mins

Opening, informations, course introduction

70 mins

Section 1: Introduction − Basic terms and definitions − Description of the disturbance (sources, power electronic converters, effects) − Methods of voltage and current harmonics mitigation Modality: Lesson and discussion

45 mins

Power theories in electrical circuits Modality: Lesson, computer laboratory and discussion

15 mins

Coffee break

60 mins

Section 2:High harmonics passive filters Modality: Lesson and discussion

Second day: 45 mins

Section 3: Active power filters Modality: Lesson, laboratory and discussion

45 mins

Interharmonics Modality: Lesson and discussion

15 mins

Coffee break

45 mins

Section 4: Measuring techniques and instrumentation (measuring instruments, measuring signal analysers) Modality: Lesson, laboratory and discussion

15 mins

International, European and other standards and regulations Modality: Lesson and discussion

45 mins

Neutral line and transformer sizing in the environment of distorted current and voltages Modality: Lesson and discussion

15 mins

Coffee break

75 mins

Section 5:Voltage and current distortion – case studies Methods of analysis Modality: Lesson, laboratory and discussion

30 mins

Final discussion and conclusions, End of the course, user satisfaction survey (user’s questionnaire), Confirmations of attendance

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GENERAL NOTES each day there will be two coffee breaks according to the seminar program; at the beginning of the course the lecturer will explain course aims and at the end he will verify their fulfilment; the course will be divided in theoretical and practical sections; at the end of the lessons, a user satisfaction survey will help the lecturer in monitoring the course quality.

TEACHING METHODS

Teaching methods are summarized in three main moments: − − −

knowledge transfer (Lesson) topics exposure by the lecturer with the help of slides and presentation of practical cases; deepening/learning verification (Discussion) general discussion stimulated by the lecturer (also during the lesson) to verify knowledge transfer; practical training, laboratory activities; group work

During all the sections, the lecturer will always attend, with teaching and/or activity coordination duty.

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DIDACTIC MATERIAL AND TOOLS

The didactic tools which will be used by the lecturers will be: − Blackboard − Video-projector − Notebook − Microphone The lecture room will be suitable to allow the use of all the above listed didactic tools and to enable group work for the attendants. Each user will receive, during the registration, a folder containing: − course program; − lecture notes containing all or part of the lecture slides. Some additional electronic tools will be available also in electronic format at: http://www.leonardoenergy.org/drupal/ . The folder will also include a user satisfaction questionnaire and a knowledge test (which will be both filled and submitted at the end of the course).

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EXISTING KNOWLEDGE REQUIREMENTS

The following (on the basic level) shall be prerequisite for the participant: − − − −

electric circuits theory: AC circuits electric machines electric power engineering; power system power electronics

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electric metrology. ACQUIRED COURSE KNOWLEDGE

The knowledge acquired during the course should be sufficient for: − − − − − −

identification of the distortion nature distortion source identification disturbance assessment by means of measuring evaluation of technical and economic effects of disturbance proposing remedial measures formulation of contract between the supplier and consumer of electric power on the basis of the existing standards and regulations

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