A Multi-objective Optimal Scheduling Method for Power System Based on Two-layer Consistency Algorithm

Abstract

The present invention proposes a power system multi-objective optimization dispatching method based on a double-layer consistency algorithm. The process includes: establishing a power system multi-objective optimization dispatching model; finding the optimal condition; designing a double-layer consistency algorithm to solve it, and finding the optimal Optimal output, calculating the minimum value of comprehensive expectation; the invention considers the influence of transmission loss on system supply and demand balance and unit output optimization, and can realize real-time calculation of transmission loss; adopts linear weighted sum method to convert multi-objective optimization problem into single-objective For optimization problems, the supply side can better meet its own interests by adjusting the weighting coefficient according to the demands of the enterprise; realize the optimal allocation of electric energy, and guide the supply side to formulate a reasonable production capacity plan; At the same time, it improves the economic benefits of the enterprise and the environmental protection benefits of the society; it is less dependent on communication and effectively protects the privacy of enterprises and users, and can realize the plug-and-play of the unit 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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