A multi-objective optimal dispatching method for power system based on two-level consistency algorithm

Abstract

The invention provides a multi-objective optimal dispatching method of a power system based on a two-layer consistency algorithm. The process comprises the following steps: establishing a multi-objective optimal dispatching model of the power system; searching for the best condition; designing a two-level consistency algorithm to find out the optimal output of the generator and calculating the minimum value of comprehensive expectation. The invention considers the influence of the transmission loss on the system supply-demand balance and the unit output optimization, and can realize the real-time calculation of the transmission loss. The multi-objective optimization problem is transformed into a single objective optimization problem by using linear weighted sum method. The supply side cansatisfy its own interests by adjusting the weighted coefficient according to the demand of the enterprise. The optimal configuration of electric energy is realized, and the supply side is guided to make a reasonable capacity plan. On the premise of considering the transmission loss, it can meet the user's load demand and improve the economic benefit and social environmental protection benefit of the enterprise. Low dependence on communication and effective protection of enterprise and user privacy, and can achieve plug and play group and effectively respond to network topology changes.

Description

technical field [0001] The invention relates to the technical field of electric power system economic dispatching, in particular to a multi-objective optimal dispatching method of electric power system based on double-layer consistency algorithm. Background technique [0002] As an important part of technical and economic optimization in power system operation, economic dispatching aims to minimize the total operating cost of the system by optimizing the distribution of load demand and rationally arranging the power generation plan under the premise of satisfying the operating constraints of power generation units. The economic dispatch of the power system is essentially a resource allocation problem. On the premise of meeting the load demand of the user side and the quality of power supply, guide the supply side to formulate a reasonable capacity plan, reduce the operating cost of the enterprise, and ensure the safe and stable operation of the system. [0003] Economic disp...

AI Technical Summary

Problems solved by technology

However, the centralized algorithm has the following key problems: first, the system control center requires high communication construction costs; second, the huge computing and communication burden is likely to cause a single point of failure; in addition, the centralized algorithm is easily affected by communication failures and cannot normally realize economic dispatch Function

[0004] Existing literature on distributed economic dispatching of power systems focuses on single-objective optimization, and rarely studies multi-objective optimization problems in the context of various actual needs of enterprises. Secondly, most of these literatures assume that the line is not The ideal condition of generating transmission loss ignores the important impact of transmission loss on the balance of supply and demand of the system, so the optimal scheduling result will lead to: the output of the unit cannot meet the actual demand of the load, affecting the normal demand for energy on the user side; the system power The balance cannot be effectively guaranteed by the power grid, causing frequency fluctuations in the power grid to endanger the safe and stable operation of the system

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