Electrical Power System Medium and High Voltage Switch Gear

Introduction

Medium and high voltage electrical power switchgears are critical and important components of an electrical installation. The salient equipment are the power transformer, the circuit breaker and the gas insulated switchgear. Currently these switchgears are migrating to eco efficient characteristics incorporating eco-friendly substances like fluids and gases. With regards to the reduction of global warming potential, new green gases are developed to replace the sulfur hexafluoride gas used in circuit breakers. In the gas insulated substations eco-friendly designs are now available incorporating digital components. Maintenance of the medium and high voltage switchgears have progressed significantly with the emergence of new testing and diagnostics instruments. Remote monitoring has become a norm for high voltage transformers and circuit breakers. The operations of these switchgears have to be a more reliable and secured parameters, by incorporating digital technologies, artificial intelligence and internet of things. This training course will emphasis on operations, characteristics and maintenance of eco efficient of gas insulated switchgears, transformers and circuit breakers.

Objectives

By the end of this Energy Training Centre training course, participants will learn to:

• Recognize the types and characteristics of medium and high voltage switchgears
• Explore the merits of eco efficient and eco-friendly switchgears
• Understand the merits of ester based oils for transformers
• Appreciate the use of green gases for gas insulated substations and circuit breakers
• Achievement of well-maintained and safe switchgears for operations

Training Methodology

This course will ensure that participants will receive a thorough training on the subjects covered by the outline with the instructor utilizing a variety of proven adult learning teaching and facilitation techniques. Each participant will receive a copy of the comprehensive course material. The presenter will outline and discuss the topics using computer displays, videos and power point presentation. The training is designed to have an interactive format to maximize delegate participation. Questions and answers are encouraged throughout and at the daily sessions. Needs-Based case-studies and examples will be discussed in problem solving workshop sessions. This gives participants the opportunity to discuss with other delegates and the presenter their specific problems and appropriate solutions.

Who Should Attend?

This training course is suitable to a wide range of professionals but will greatly benefit:

• Electrical engineers
• Maintenance technicians
• Electrical supervisors
• Engineering professionals
• Managers of the electrical engineering department

Course Outline

DAY 1: INTRODUCTION TO MEDIUM AND HIGH VOLTAGE POWER TRANSFORMER AND INSTRUMENT TRANSFORMERS 

• Construction and characteristics of transmission and distribution transformers
• Major common components and functionalities of a power transformer
• Digital components of power transformers
• Power transformer protection methods
• Current transformer characteristics and construction
• Capacitance voltage transformer construction and operations 

DAY 2: TYPES OF MEDIUM VOLTAGE AND HIGH VOLTAGE CIRCUIT BREAKERS OPERATIONS AND CHARACTERISTICS 

• Principles and importance of arc quenching in circuit breakers
• Air circuit breakers operation, construction, and characteristics
• Sulfur hexafluoride circuit breakers operations and construction
• Construction live tank and dead tank circuit breakers
• Medium voltage vacuum circuit breaker construction and characteristics
• Hybrid medium voltage circuit breakers 

DAY 3: REDUCTION OF GLOBAL WARMING POTENTIAL REDUCTION OF CARBON FOOTPRINT 

• Importance of carbon footprint reduction and its impacts
• Greenhouse gases produced by electrical switchgears
• Natural and synthetic ester base dielectric fluid for power transformer
• Various green gases as replacement for sulfur hexaflouride
• Eco efficient gas insulated substation switchgears
• State-of-the-art eco-friendly medium and high voltage vacuum circuit breaker 

Day 4: MAINTENANCE AND DIAGNOSTIC INSTRUMENTS FOR MEDIUM AND HIGH VOLTAGE SWITCHGEARS 

• Importance of maintenance
• Maintenance strategies with emphasis on condition based maintenance
• Merits of thermography and relevant test instruments
• Partial discharge presence in medium and high voltage switchgears and mitigation techniques
• Power transformer routine tests and relevant instrument
• Remote monitoring of dissolved gas analysis for transformer 

DAY 5: INTRODUCTION TO DIGITAL SUBSTATIONS COMPRISING OF THE MAIN ELECTRICAL POWER SWITCHGEARS 

• Overview and merits of a digital substation
• Components of a digital substations including intelligent electronic devices and fiber optics cable
• Digital transformer incorporating robotics, artificial intelligence (AI) and internet of thing (IoT)
• Integration of switchgears between renewable energy and the grid