Investigation of the Parallel Operation Stability of Minigrid Based on Small Generation with an External Electrical Network of the Power System

Abstract

One of the main modern trends in the development of the electric power industry is decentralization with the transition to the use of low capacity electric generators (1–25 MW) located in close proximity to electric loads, as well as decentralization of control modes, mainly in distribution electric networks. The using of such electric generators (low capacity power plants) as the main source of energy supply with an appropriate control system, which ensures, among other things, the reliability of energy supply to consumers, allows to talk about creating qualitatively new low capacity power systems (Minigrid) based on them. The research objective is to study the method that provides the technical feasibility of safe synchronous operation of low capacity power units in Minigrid with network on parallel operation, and check the setpoint settings of the leading balanced separation of the local power supply system from the external electric network. The modeling results of Minigrid modes based on fuel generation and network equivalent area scheme of Power System are presented. The results allow drawing conclusions about the safety of Minigrid parallel operation based on a cogeneration multi-unit power plant with an external power supply network using the method developed.