PQ 1stLevel M7 Curriculum

8/14/2019 PQ 1stLevel M7 Curriculum

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Power Quality

Training Courses

LPQIVES is co-finaced by:

LPQIVES is a programme of:

LPQI is part of:

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The influence of static converters on the supply network


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Module 7

The influence of static converters on the supply network

1 INTRODUCTIONThe increasing use of power electronic converters has led to an increase of their negative influenceon supply network and other loads. In the last decade or so, the focus on harmonic distortion hassharpened. Static converters are also the large consumers of reactive power and sources of otherdisturbances - voltage fluctuations, commutate notches etc. This effects, as well as possiblemethods of their mitigation are presented.

1.1 General aims

The main intention of this seminar is to provide information and tools that allow easy prediction ofthe harmonic distortion of static converters in a given system and to find reasonable (economical)solution if the negative influence on the supply network is exceeding acceptable levels.

1.2 Target groupsThis modules 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 differentduration), with these contents and related aims.

1st

dayContents INTRODUCTION (harmonic related standards, harmonic voltage distortion, reactive power, PF, DPF)

HARMONIC CURRENT DISTORTION OF THE DIODE RECTIFIER (single-phase and three-phase dioderectifier, inductor- and capacitor-output (dc) filter, diode rectifier at non-ideal conditions)HIGH POWER FACTOR THREE-PHASE RECTIFIERS (built-in dc-link inductance, multi pulse converters,active rectifier, third harmonic injection scheme)

Aims Supplying knowledge concerning basics of harmonics generated by one- and three-phase diode and thyristorconverters witg LR and RC dc load, passive and active for harmonics mitigation

2nd

dayContents COMMUTATION PHENOMENA AND VOLTAGE NOTCHES, REACTIVE POWER

SYSTEM LEVEL HARMONIC REDUCTION TECHNIQUES (mixing single-phase and three-phase dioderectifiers, quasi multi-pulse, passive filter, active filter)THE INFLUENCE OF DIRECT AND INDIRECT STATIC FREQUENCY CONVERTER ON SUPPLY NETWORK(PWM control, etc.), OVER CONVERTER TOPOLOGIESREQUIREMENT BASED COST-OPTIMAL RECTIFIER TOPOLOGYPOWER ELECTRONIC APPLICATIONS IN POWER TRANSMISSION SYSTEMS (HVDC Transmission, SVC,TCSC, STATCOM, SSSC, UPFC, Other FACTS Devices)POWER ELECTRONIC APPLICATIONS IN POWER DISTRIBUTION SYSTEMS (custom power devices);DISTRIBUTED GENERATION AND GRID INTERCONNECTION

Aims Supplying knowledge concerning principles of commutation phenomena, reactive power consumed by staticconverters. Use of the obtained knowledge to analysis and solving problems of harmonics and interharmonicsgenerated by power electronic equipment and the compensation of reactive power, power electronic

applications in power transmission and distribution systems

Below theres a detailed overview of the course contents.

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2.1 Pathway of learning flow chart

Time progression(hours)

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3 COURSE DETAILED PROGRAM

First day:

60 mins Participants registration

5 mins Openning, informations, course introduction

70 mins Section 1: INTRODUCTION (harmonic related standards, harmonic voltagedistortion, reactive power, PF, DPF)Modality: Lesson and discussion

45 mins HARMONIC CURRENT DISTORTION OF THE DIODE RECTIFIER (single-phase and three-phase diode rectifier, inductor- and capacitor-output (dc) filter,diode rectifier at non-ideal conditions)Modality: Lesson, computer laboratory and discussion

15 mins Coffee break

60 mins Section 2: HIGH POWER FACTOR THREE-PHASE RECTIFIERS (built-in dc-linkinductance, multi pulse converters, active rectifier, third harmonic injectionscheme)Modality: Lesson and discussion

Second day:

45 mins Section 3: COMMUTATION PHENOMENA AND VOLTAGE NOTCHES,REACTIVE POWERModality: Lesson, laboratory and discussion

45 mins SYSTEM LEVEL HARMONIC REDUCTION TECHNIQUES (mixing single-phaseand three-phase diode rectifiers, quasi multi-pulse, passive filter, active filter)Modality: Lesson and discussion


45 mins Section 4: THE INFLUENCE OF DIRECT AND INDIRECT STATICFREQUENCY CONVERTER ON SUPPLY NETWORK (PWM control, etc.),OVER CONVERTER TOPOLOGIESModality: Lesson, laboratory and discussion

15 mins REQUIREMENT BASED COST-OPTIMAL RECTIFIER TOPOLOGYModality: Lesson and discussion

45 mins POWER ELECTRONIC APPLICATIONS IN POWER TRANSMISSIONSYSTEMS (HVDC Transmission, Static Var Compensator (SVC), ThyristorControlled Series Compensator (TCSC), Static Compensator (STATCOM), StaticSynchronous Series Compensator (SSSC), Unified Power Flow Controller(UPFC), Other FACTS Devices)Modality: Lesson and discussion


45 mins Section 4: POWER ELECTRONIC APPLICATIONS IN POWER DISTRIBUTIONSYSTEMS (custom power devices); DISTRIBUTED GENERATION AND GRIDINTERCONNECTION

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Modality: Lesson, laboratory and discussion

45 mins Final discussion and conclusions, End of the course, user satisfaction survey(users questionnaire),Confirmations of attendance

4 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.

5 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 knowledgetransfer;

practical training, laboratory activities; group work

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

duty.

6 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 enablegroup 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.leonardo-energy.org/drupal/.

The folder will also include a user satisfaction questionnaire and a knowledge test (which will beboth filled and submitted at the end of the course).

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7 EXISTING KNOWLEDGE REQUIREMENTS

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

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

power electronics

8 ACQUIRED COURSE KNOWLEDGE

The knowledge acquired during the course should be sufficient for:

analysing of converter influence on supply network evaluation of technical and economic remedial measures (eliminations of voltage/current

harmonics, SVC systems) application of power electronic equipment in transmission and distribution systems (FACTS

and CUSTOM POWER equipment)

PQ 1stLevel M7 Curriculum

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