Acquisition method for minimum phase linear effective power flow of alternating current power grid

Abstract

The invention is in the field of electrical engineering, and relates to an acquisition method for minimum phase linear effective power flow of alternating current power grid. The method includes establishing a symmetric linear function relationship between an active power injected at a node and a node voltage phase according to the known parameters of alternating current power grid, the operating characteristics of alternating current power grid, and the active power injected at the node; establishing a linear function relationship between the node voltage phase and the minimum phase of the active power injected at the node according to the symmetric linear function relationship; acquiring the minimum voltage phase at each node in alternating current power grid; establishing a linear function relationship between the linear active power flow at the minimum phase of a branch and the active power injected at the node according to the linear function relationship of the minimum phase, the known nonlinear active power flow of the branch, the active power injected at the node, and the operating characteristics of alternating current power grid; and acquiring the minimum phase linear active power flow of each branch. The acquisition results are unique, follow the circuit regularity, and accurately reflect the essential characteristics of phase states' variation of alternating current power grid.

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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