A Coordinated Economic Scheduling Method for Distributed Transmission and Distribution Networks

Abstract

The present invention relates to the technical field of power system operation and maintenance, and more specifically, relates to a distributed transmission and distribution network collaborative economic scheduling method, including: establishing a network structure, and establishing a transmission and distribution joint economic scheduling model based on the network structure; network structure Including the transmission network and n distribution networks, the scheduling model includes the objective function and constraint conditions; based on the Newton method iterative calculation method, F(x) is iteratively solved by the outer loop, and at the same time F T and medium variable to carry out the distributed iterative solution of the initial value of the inner loop; until the iteration of the outer loop meets the end condition, the transmission network and the distribution network n output their respective scheduling results. The present invention introduces the Newton's method iterative calculation of the outer loop and the distributed iterative calculation of the inner loop in the optimization calculation, and converts the optimization problem of the cooperative dynamic economic dispatch of the transmission network and distribution network into a two-layer iterative problem. Since the outer layer iteration is the Newton's method iteration, With quadratic convergence, it can realize the distributed accurate and efficient solution of the optimization calculation problem of transmission and distribution collaborative scheduling.

Description

technical field [0001] The invention relates to the technical field of power system operation and maintenance, and more specifically, to a method for coordinated economic dispatch of a distributed transmission network and distribution network. Background technique [0002] With the widespread access of distributed power to the distribution network, especially the increased penetration of renewable energy such as photovoltaics and wind power, the impact of the distribution network on the transmission network cannot be ignored, bringing security risks to it. At the same time, the transmission network also plays an important role in coordinating the joint operation of the distribution network with distributed power. The joint optimization of transmission network and distribution network mostly adopts the method of splicing the integrated model of transmission network and distribution network to complete the joint calculation. Massive data such as data is sent to the transmissi...

AI Technical Summary

Problems solved by technology

However, most of these methods decompose the original problem into multiple sub-problems and carry out internal optimization through boundary information interaction between multiple agents, but they do not analyze the joint optimization problem from a global perspective, and cannot guarantee to obtain a global model consistent with the centralized model. The optimal solution has the possibility of further improving the economy; and most of the existing distributed methods of these methods are iterated based on the gradient method, and the number of iterations is relatively high. In practical applications, they cannot meet the fast calculation requirements of the joint optimization of transmission and distribution networks.

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