A Short-Term Congestion Management Method for Transmission Network Based on Coordination of Transmission and Distribution

Abstract

The invention discloses a short-term congestion management method for a transmission network with coordinated transmission and distribution, which is a double-layer optimization method that equates the distribution network to a virtual power plant to participate in the transmission network congestion management market, wherein the upper layer is the transmission network layer, and the lower layer is the transmission network layer. The distribution network layer is suitable for the short-term congestion management of the transmission network when multiple distributed power sources and demand-side response resources are connected to the distribution network. The present invention is based on minimizing transmission network congestion management costs to make full use of transmission and distribution network resources, and proposes a transmission and distribution coordinated transmission network congestion management double-layer optimization model. The transmission network layer is based on the quotation and capacity information of each distribution network and power plant Determine the congestion management plan; each distribution network determines the dispatch plan according to the adjustment requirements of the transmission network layer, and updates the quotation and capacity information and returns it to the transmission network layer. The invention utilizes the good effect of the virtual power plant in the electric power market, maintains the existing dispatching mode and market structure of the transmission and distribution network, and solves the congestion management problem of the transmission and distribution network through a double-layer optimization method, which is conducive to making full use of power distribution Network schedulable resources reduce congestion management costs. The invention has the advantages of high calculation precision and wide applicability.

Description

technical field [0001] The invention relates to a short-term congestion management method of a transmission network with coordination of transmission and distribution, in particular to a two-layer optimization method considering that a distribution network participates in transmission network congestion management with VPP. Background technique [0002] In the electricity market environment, when power flow congestion occurs in the transmission network, it is necessary to eliminate the congestion by adjusting the transaction plan in the short term to ensure the safe and economical operation of the power grid. Conventional transmission network congestion management is mainly realized by adjusting unit output or load shedding, and the cost of congestion management is high. With a large number of resources such as DG and demand response (DR) connected to the distribution network, the controllability of the distribution network is greatly increased, and the controllable resource...

AI Technical Summary

Problems solved by technology

However, these resources are small in capacity, large in quantity, and widely distributed. It is difficult to directly add them to the operation and management of the power market of the transmission network, and the transmission and distribution networks belong to different dispatching and control centers.

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