Reliability Evaluation Method for Power Distribution Systems With Renewable Distributed Generations and Adjustable Loads

Abstract

With the continuous development of distribution systems, the integration of various distributed generations (DGs) and adjustable loads has increased system uncertainty, placing higher demands on distribution system reliability evaluation. The accuracy of traditional reliability evaluation methods is poor when assessing the reliability of distribution systems that incorporate renewable DGs and adjustable loads. To address this issue, this paper proposes a reliability evaluation method for distribution systems that include multiple types of DGs and adjustable loads. Initially, models for lines, renewable DGs, and loads are established. Then, adjustable loads are classified and their impact on system reliability is analysed. Subsequently, based on the Monte Carlo simulation method, a framework for reliability evaluation of the distribution system considering multiple DGs and adjustable loads is proposed and reliability indices reflecting the influence of adjustable loads on the system reliability are also proposed. Finally, a case study is conducted using the modified IEEE 123-node test system to verify the effectiveness of the proposed method, showing that the integration of renewable DGs and adjustable loads can enhance the reliability of the distribution system.