A transmission network short-term congestion management method for transmission and distribution cooperation

Abstract

The invention discloses a transmission network short-term congestion management method for transmission and distribution cooperation, It is a bilevel optimization method that equates a distribution network with a virtual power plant to participate in a transmission network congestion management market, in which the upper layer is transmission network layer and the lower layer is distribution network layer, which is suitable for short-term congestion management of transmission network when multi-distributed generation and demand-side response resources are connected to distribution network. Based on minimizing the congestion management cost of the transmission network to fully utilize the resources of the transmission and distribution network, the invention proposes a transmission network congestion management bi-level optimization model of transmission and distribution cooperation. The transmission network layer determines the congestion management scheme according to the quotation andcapacity information of each distribution network and the power plant; the transmission network layer determines the congestion management scheme according to the quotation and capacity information of each distribution network. Each distribution network determines the dispatching plan according to the adjustment requirements of the transmission network layer, and updates the quotation and capacity information to return to the transmission network layer. The invention utilizes the good function of the virtual power plant in the electric power market, maintains the existing dispatching mode andthe market structure of the transmission and distribution network, solves the transmission network congestion management problem of the transmission and distribution cooperation through the double-layer optimization method, and is conducive to making full use of the dispatchable resources of the distribution network and reducing the congestion management cost. The invention has the advantages ofhigh calculation accuracy 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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