Distributed power transmission network and power distribution network collaborative economic dispatching method

Abstract

The invention relates to the technical field of electric power system operation and maintenance, in particular to a distributed power transmission network and power distribution network collaborativeeconomic dispatching method, which comprises the following steps: establishing a network structure, and establishing a transmission and distribution combined economic dispatching model based on the network structure, wherein the network structure comprises a power transmission network and n power distribution networks, and the scheduling model comprises an objective function and constraint conditions; and performing external loop iteration solving on the F(x) based on a Newton method iterative calculation method, and performing internal loop initial value distributed iteration solving on FT and median variables, wherein the power transmission network and the power distribution network n respectively output respective scheduling results until the external loop iteration meets the end condition. According to the distributed power transmission network and power distribution network collaborative economic dispatching method, Newton method iterative computation of an outer ring and distributed iterative computation of an inner ring are introduced into optimization computation; a power transmission network and distribution network collaborative dynamic economic dispatching optimization problem is converted into a two-layer iteration problem; and due to the fact that outer-layer iteration is Newton method iteration, secondary convergence is achieved, and distributed accurate and efficient solving of the transmission and distribution collaborative dispatching optimization calculation problem can be achieved.

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...

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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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