Distributed active power economic allocation method considering line loss for microgrid

Abstract

The invention discloses a distributed active power economic allocation method considering line loss for a microgrid. With regard to a distributed power supply employing droop control, the marginal cost of each distributed power supply is corrected by a network loss correction factor, and the active power economic allocation is affected by considering line loss; and a distributed strategy based on a consistency algorithm is adopted, and active power economic allocation is achieved by achieving consistency of the marginal cost of each distributed power supply. The marginal cost is corrected and the influence of line loss is considered, compared with an active power allocation method which does not consider the line loss, the method has the advantages that the line loss is lower, the power generation cost of the system is still effectively reduced, and the microgrid economically and stably runs; and an iterative mode of the consistency algorithm is adopted to distributed control, a central controller is not needed to carry out processing on big data, and the method is simple to implement and is suitable for a microgrid system with a variable network structure.

Description

technical field [0001] The invention belongs to the technical field of micro-grid control and optimization, and relates to a micro-grid distributed active power economic distribution method considering line loss. Background technique [0002] Microgrids generally adopt a hierarchical control architecture to achieve stable operation, and the primary control often adopts droop control to achieve autonomous power distribution and rapid response of electrical quantities. Microgrids often use multiple types of distributed power sources in parallel to improve power supply reliability. However, different types of distributed power sources have different power generation costs. The traditional droop control method of distributing power in proportion to capacity can easily lead to high system operating costs. , the economy of the microgrid is poor. [0003] The secondary control can carry out power economic distribution to reduce the cost of system power generation, and often adopts...

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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to solve the problem that the existing micro-grid adopts a centralized method, does not adopt a distributed strategy, and distributes uneconomically, thereby providing a micro-grid distributed active power economic distribution method that takes into account line loss. Using the network loss correction factor to correct the marginal cost of each distributed power supply, taking into account the impact of line loss on the economic distribution of active power; different from the traditional centralized method, using distributed strategies to achieve economic distribution of active power and system voltage Restoration, stable operation of microgrid economy

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