Cooperative power flow control method and system for power transmission network and power distribution network

Abstract

The invention provides a cooperative power flow control method and system for a power transmission network and a power distribution network. The cooperative power flow control method comprises the steps that a power transmission system model is established for the power transmission network according to an EMS, a power distribution system model is established for the power distribution network according to a DMS, an information interaction model is established between the power transmission network and the power distribution network, power flow is calculated many times through a power flow calculation model of the EMS and the DMS, an iterative calculation result is obtained, data in the information interaction module are assigned to conduct interaction according to the iterative calculation result, a cooperative power flow calculation result of the power transmission network and the power distribution network is determined, and the cooperative power flow of the power transmission network and the power distribution network is controlled according to the cooperative power flow calculation result of the power transmission network and the power distribution network. According to the cooperative power flow control method and system for the power transmission network and the power distribution network, due to the facts that EMS and DMS partitioned power flow calculation is applied to the power transmission network and the power distribution network and iterative calculation is conducted, calculation errors caused by establishment of a network model according to an equivalent method for power flow calculation in the EMS and the DMS are reduced, the accuracy of cooperative power flow calculation of the power transmission network and the power distribution network is improved, cooperative power flow of the power transmission network and the power distribution network can be accurately controlled, and safe and efficient operation of a power system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method and system for coordinated power flow control of transmission and distribution networks. Background technique [0002] In the actual power system, the whole power system is composed of power generation, transmission system and power distribution system. [0003] The existing advanced application software of EMS (Energy Management System, energy management system) only performs network modeling on the transmission system part of the entire power system, and usually takes its equivalent as Therefore, the power flow calculation function of EMS only calculates part of the power flow in the transmission system, not the power flow in the distribution system. The existing high-level application software of DMS (Distribution Management System, distribution management system) only performs network modeling on the distribution system part of the entire power system, and the e...

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Problems solved by technology

[0005] Based on this, it is necessary to provide an accurate transmission and distribution network coordinated power flow control and system to ensure that there are large errors in the coordinated power flow control of the transmission and distribution network in the existing power system, and serious problems affect the efficient and safe operation of the power system. Safe and efficient operation of the system

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