Using a simulator of Minigrid modes to solve design problems

Abstract

RELEVANCE: The main directions of modern energy development include the use of distributed small-scale generation and various facilities based on them with integration into existing distribution electric networks of centralized power supply, as well as the digitalization of such facilities and technologies for their design, personnel training.THE PURPOSE: The possibility and effectiveness of using the Minigrid mode and control simulator (a simulator for learning mode management and training operational personnel) as a means of solving a number of design tasks when creating small-scale generation facilities and integrating them into centralized power supply networks to obtain integral indicators of its effectiveness is being investigated.METHODS: Simulation modeling of normal and emergency modes of «Minigrid» is used on an annual time interval using a digital simulator developed at NSTU. The modes are set by daily load graphs, disturbances by stochastic characteristics. The operational, emergency and operational control of the network circuit and generation is modeled, taking into account the possibilities of autonomous and parallel operation of the Minigrid with an external power system, followed by the calculation of integrated indicators of the technical efficiency of design solutions for generating equipment options and mode control methods.RESULTS: Using the example of a typical Minigrid, various design tasks are considered, in solving which, according to uniform efficiency indicators, it is possible to evaluate and select the preferred configuration of the local power supply system. In particular, the dependences of the annual undersupply of electricity and the utilization factor of the installed generating capacity of the power plant on the number and capacity of its power units, the operating modes of the Minigrid at a given daily load schedule are obtained. The possibility of expanding the scope of the digital simulator of «Minigrid» modes is demonstrated.CONCLUSION: The results obtained indicate the effectiveness of using the simulator to solve a number of design tasks when creating a Minigrid. The developed digital simulator of «Minigrid» modes, in addition to learning how to manage modes, can be used as a unified tool for analysis and decision-making at the stage of design alternatives.

Keywords

• distributed small generation
• minigrid
• local power supply systems
• power grid
• parallel work
• automation
• simulator
• digital twin