A Method for Obtaining Minimum Phase Linear Active Power Flow of AC Power Network

Abstract

An acquisition method for a minimum phase linear active power flow of an AC power network. The method includes: according to known AC power network parameters, known AC power network running characteristics and known node injection active power, establishing a symmetric linear function relationship of the node injection active power with respect to a node voltage phase; according to the symmetric linear function relationship, establishing a minimum phase linear function relationship of the node voltage phase with respect to the node injection active power, and acquiring a minimum voltage phase of each node in the AC power network; and according to the minimum phase linear function relationship, a known branch non-linear active power flow, the known node injection active power and the known AC power network running characteristics, establishing a linear function relationship of a branch minimum phase linear active power flow with respect to the node injection active power, and acquiring a minimum phase linear active power flow of each branch. An acquisition result of the acquisition method is unique, follows a circuit law, and can accurately reflect substantive characteristics of a phase state variation of the AC power network.

Description

technical field [0001] The invention belongs to the field of electric power engineering, in particular to a method for obtaining the minimum phase linear active power flow of an AC power network. Background technique [0002] At present, the AC power network not only needs to use linear active power flow in the real-time dispatch of normal state to ensure real-time economy, but also needs to use linear active power flow in the control of fault state to ensure the real-time performance of safe and stable control. Therefore, the linear active power flow of AC power grid is an important tool for its safe, stable and economical operation. [0003] The existing methods for obtaining the linear active power flow of the AC power network need to artificially designate the voltage phase of a certain node in the power network to be equal to zero, that is, to designate the node as the reference node, which will result in different obtained reference nodes. In the AC power network, the...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for obtaining the minimum phase linear active power flow of the AC power network, aiming at solving the problem that the acquisition results of the existing methods for obtaining the linear active power flow of the AC power network do not conform to the uniqueness principle in the circuit electromagnetic field theory , Does not follow the circuit law and cannot accurately reflect the essential characteristics of the phase state change of the AC power network

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