Series-structure light-storing-type multi-micro-grid economical operation system and method

Abstract

The invention discloses a series-structure light-storing-type multi-micro-grid economical operation system and a method. The series-structure light-storing-type multi-micro-grid economical operation system comprises a primary system and a control system. The primary system is formed in the mode that two sub-micro-grids are connected in series through a grid-connection and off-grid switch K1, and the primary system comprises a photovoltaic power generation array, a storage battery and local loads. The control system is formed by sub-micro-grid controllers, photovoltaic controllers, energy storing controllers, load controllers and a communication network. According to the series-structure light-storing-type multi-micro-grid economical optimization method, a distributed model prediction control algorithm considering a peak-valley electricity price is adopted, and according to the source load characteristic and the operating characteristic in the multiple micro-grids, a micro-grid prediction model and an optimized objective function are established. The established series-structure light-storing-type multi-micro-grid economical operation system and the method have the important engineering application value in developing researching of planning, design, mode switching and optimizing operation of the light-storing-type multi-micro-grid system.

Description

technical field [0001] The invention belongs to the field of micro-grids, and in particular relates to a system and method for economical operation of multi-micro-grids with a series structure light-storage type. Background technique [0002] Energy is an important material basis for human survival and an important impetus for social and economic development. However, with the advancement of industrialization and the rapid increase of world population, the shortage of conventional energy and environmental pollution have become increasingly apparent, which have been unable to meet the needs of human society. Sustainable development and the need to improve the quality of life, for this reason, from the long-term goal of human development, the development of green renewable energy is an inevitable trend. [0003] The power grid based on the microgrid form facilitates large-scale distributed energy access to the medium and low voltage distribution network system. It can not only...

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Problems solved by technology

[0005] After searching the existing technical literature, it is found that the Chinese patent application number is: 201220002686.4, and the name is: a micro-grid system for laboratories. The micro-grid system in this application only includes a primary system, and does not involve control system design and economics. optimization method, and the microgrid system in this application is a single microgrid, which is not applicable to the key technology research of multi-microgrid

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