This chapter aims to present different aspects of reliability and power quality in microgrids from a perspective of its interconnection with a larger system, such a smart grid or a centralised power system. After definitions and key concepts are presented, a case study is included in order to highlight how vulnerable a microgrid can be under disturbances, and the important role of control and storage systems to keep the grid stable and working properly.

Chapter Contents:

• 5.1 Introduction
• 5.1.1 Overview
• 5.1.2 Chapter's aim and scope
• 5.2 Power quality
• 5.2.1 What is power quality?
• 5.2.2 Why power quality is important?
• 5.2.3 Smart grids and power-quality issues
• 5.2.4 The concept of virtual generator in microgrids
• 5.2.4.1 Research in the literature
• 5.2.4.2 Virtual inertia principle
• 5.2.4.3 Comparison
• 5.2.4.4 Discussion
• 5.3 Reliability
• 5.3.1 What is reliability?
• 5.3.2 Interoperability
• 5.3.3 Cybersecurity
• 5.3.4 Flexible operation and self-healing
• 5.3.5 Demand response
• 5.3.6 Smart grids and microgrid standards
• 5.4 Case study
• 5.4.1 Introduction
• 5.4.2 Study system
• 5.4.2.1 Location
• 5.4.2.2 Transmission network
• 5.4.2.3 Renewable generation
• 5.4.2.4 Storage systems
• 5.4.3 Control strategy
• 5.4.3.1 Normal condition
• 5.4.3.2 Abnormal condition
• 5.4.4 Scenario construction
• 5.4.5 Simulation results
• 5.4.5.1 Scenario 1: Target system connected to the local utility
• 5.4.5.2 Scenario 2: Target system isolated from the local utility
• 5.4.5.3 Scenario 3: Primary frequency support by WTs
• 5.4.6 Conclusion
• References

Inspec keywords: power supply quality; power generation reliability; distributed power generation; power distribution control; power generation control; power distribution protection

Other keywords: centralised power system; control systems; storage systems; microgrid disturbances; microgrid reliability; smart grid; power quality

Subjects: Power system control; Control of electric power systems; Distributed power generation; Reliability; Power supply quality and harmonics