Diesel engine and storage battery coordinated micro grid scheduling method with multiple optimization objectives

Abstract

The invention discloses a diesel engine and storage battery coordinated micro grid scheduling method with multiple optimization objectives. According to the structure of an independent micro grid system which includes photovoltaic power generation, wind power generation, diesel engine power generation and energy storage, operational characteristics at the aspects including the photovoltaic power generation, wind power generation, diesel engine power generation and energy storage are comprehensively analyzed, a mathematic model and a target function of multi-objective-optimization scheduling which considers the cost of diesel engine power generation and the cycled electric quantity of storage batteries are provided, and constraint conditions for charging power of the storage batteries, SOC range, generating power of the diesel engines, power balance of the system and the like are established. Frontier of a non-dominated solution is obtained via the related multi-objective-optimization algorithm, and further multiple Pareto optimal solutions are obtained. The optimal scheduling schemes are determined according to different weather conditions. According to the method, a multi-objective mathematic model is established on the basis of the independent micro grid system of an island in the sea, the method aims at reducing the cost of diesel engine power generation and the cycled electric quantity of storage batteries, theoretical basis and technical support are provided for solving problems in power supply of the island in future, and the method is conducive to improving the whole operational economical efficiency of the independent island micro grid.

Description

technical field [0001] The invention relates to the technical field of smart grids, and more specifically relates to a multi-objective optimal scheduling method for a micro-grid considering the coordination and efficiency enhancement of diesel storage. Background technique [0002] my country has a long coastline and a large number of islands. Safe and reliable power supply is the basic guarantee for the development and construction of islands and the daily life of residents. In the past, my country's islands mostly used submarine cables or self-provided diesel generators for power generation, which caused frequent failures and serious environmental pollution. Under normal circumstances, islands and surrounding areas are rich in renewable energy power generation resources such as solar energy and wind energy. With the development of distributed power supply and micro-grid technology, a variety of energy complementary island micro-grid power supply modes can be formed, and ba...

AI Technical Summary

Problems solved by technology

[0003] However, the current research on the optimal operation of independent microgrids is mainly to optimize the operating costs of controllable traditional power generation, without taking into account the operating loss of energy storage in the system

Although the investment in the initial construction of the microgrid battery is relatively low, the battery is often replaced due to the service life, and the battery of the energy storage system in the later operation life is the most expensive part of the entire system

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