Decentralized cooperative economic dispatching method comprising multi-microgrid active distribution system

Abstract

The present invention discloses a decentralized cooperative economic dispatching method comprising a multi-microgrid active distribution system. The method comprises the following steps: (1) establishing a distributed power supply optimization operation model, solving an optimal scheduling model, calculating a microgrid node electricity price, considering a micro gas turbine in a microgrid, a fuel cell, output force characteristics and energy consumption characteristics of an energy storage device and wind power and photovoltaic random output force characteristics, and employing a prime-dual interior point method to calculate each node electricity price of the microgrid; (2) designing a multi-microgrid decentralized cooperative optimal scheduling frame to determine the size of each distributed power supply output force; and (3) researching the active distribution system optimal scheduling model and the solution method thereof considering the influence of multi-microgrid access. The decentralized cooperative economic dispatching method comprising the multi-microgrid active distribution system improve the electric energy quality and peak load shaving capability of the distribution system through depending on the support of the microgrid layer and network reconstruction while economic operation so as to provide valuable reference for allowing the microgrid system to access the distribution system optimal scheduling.

Description

technical field [0001] The invention relates to economic optimal scheduling of an active power distribution system, belongs to the field of smart grids, and in particular relates to a method for decentralized and coordinated economic scheduling of an active power distribution system containing multiple microgrids. technical background [0002] At present, new energy grid-connected power generation is mainly realized through centralized access to the transmission grid or distributed access to the local power distribution system. Distributed access is directly through the load side, which has good flexibility while ensuring high power supply reliability. With the development of distribution automation technology, the concept of active power distribution system came into being. The active power distribution system includes a variety of distributed power sources, which can manage the power flow by dispatching the output of each distributed power source and using a flexible netwo...

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Problems solved by technology

However, after a large number of distributed energy sources are connected to the distribution network, the state variables and decision variables increase sharply, and the centralized scheduling method exposes problems such as massive information that is difficult to process, low maintainability, and low system reliability.

At the same time, since the access of the multi-microgrid system will have a great impact on the operation control of the active power distribution system, such as the increase of network loss, the fluctuation of node voltage, etc., how to ensure the reliable operation of the power distribution system and high power quality is a key issue

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