Dynamic Vulnerability Assessment and Intelligent Control

Chapter 12Model Based Voltage/Reactive Control in Sustainable Distribution Systems

Hoan Van Pham^1,2 and Sultan Nasiruddin Ahmed³

¹Power Generation Corporation 2, Vietnam Electricity

²School of Engineering and Technology, Tra Vinh University, Vietnam

³FGH GmbH, Aachen, Germany

12.1 Introduction

Electricity demand increases continuously, hence greater amounts of power need to be transferred. System reinforcement has, however, been kept to a minimum for economic reasons. Moreover, many countries have experienced liberalization trends in electricity markets, which call for intensive variations in generation and power flows. Furthermore, increasing incentives in several countries to integrate intermittent renewable energy sources (RES) into the systems entails several challenges to system reliability and security, especially in short term operational timeframes, where a high degree of variability of power supply from RES may occur [1]. As a result, temporary over/under voltages and congested lines happen more often. This creates a demand for developing new control schemes to achieve optimal, flexible, and efficient operation for voltage regulation.

Numerous recent publications on voltage control have demonstrated its significance in system operations given several power system blackouts around the world [2, 3] and voltage violation problems [4–11]. Currently, corrective voltage control, also known as online voltage control, attracts much attention from researchers due to that fact ...