Three-phase decoupling power flow calculation method for power distribution network containing multiple transformer branches

A technology of power flow calculation and distribution network, applied in the direction of calculation, instruments, electrical components, etc., can solve the problem that the distribution network cannot be directly applied

Inactive Publication Date: 2012-12-26
HOHAI UNIV +1
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Problems solved by technology

Because the characteristics of the distribution network are different from those of the transmission network, it generally has a high R/X ratio, three-phase unbalance, and a tree-like ne...

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  • Three-phase decoupling power flow calculation method for power distribution network containing multiple transformer branches
  • Three-phase decoupling power flow calculation method for power distribution network containing multiple transformer branches
  • Three-phase decoupling power flow calculation method for power distribution network containing multiple transformer branches

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Embodiment Construction

[0022] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0023] figure 1 It is an overall flowchart of the present invention, specifically comprising the following steps:

[0024] 1) Assuming that the first node is a power supply and serves as a reference node, the three-phase voltage phasor matrix of the power supply node is (3×1 order), the three-phase voltage phasor matrix of each node is (3n×1 order), in the distribution system sequence network, the three-sequence voltage matrix of the power supply node can be obtained as (3×1 order), the thre...

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Abstract

The invention discloses a three-phase decoupling power flow calculation method for a power distribution network containing multiple transformer branches. According to the characteristics of basically symmetrical three-phase line parameters, unbalanced three-phase load and the tree structure of the power distribution network, the method comprises the following steps: performing sequence component decoupling on the three-phase unbalanced network of the power distribution network by a symmetrical component method; in a power distribution three-sequence network model, transforming the transformer branches into the common branches by a phase transformation technology; and calculating the sequence network power flow of the power distribution system by a path matrix-based loop analysis method and transforming sequence component power flow into phase component power flow by an inverse transformation principle so as to realize three-phase decoupling power flow calculation of the three-phase unbalanced system of the power distribution network containing multiple transformer branches and reduce calculated quantity. The method is clear in calculation process, simple in programming and high in calculation speed. The correctness and high convergence property of the method are verified through 34 bus test calculation examples. The method has high generality and practicability.

Description

technical field [0001] The invention relates to a three-phase decoupling power flow calculation method for a distribution network with multiple transformer branches, belonging to the field of power system analysis and calculation. Background technique [0002] Distribution network power flow calculation has been a hot spot in academic research for many years, and distribution network power flow calculation is the basis of distribution network analysis. Because the characteristics of the distribution network are different from those of the transmission network, it generally has a high R / X ratio, three-phase unbalance, and a tree-like network structure with closed-loop design and open-loop operation, so the traditional power flow algorithm for the transmission network cannot be directly applied to power distribution. network. Scholars at home and abroad have proposed various distribution network power flow algorithms according to the characteristics of the distribution networ...

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
Inventor 杨雄卫志农孙国强孙永辉韦延方袁阳陆子刚
Owner HOHAI UNIV
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