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Three-phase decoupling load flow calculation method of power distribution network based on path matrix

A technology of road matrix and power flow calculation, applied in calculation, electrical components, circuit devices, etc., can solve problems that cannot be directly applied to distribution network

Active Publication Date: 2012-12-26
HOHAI UNIV
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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 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

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  • Three-phase decoupling load flow calculation method of power distribution network based on path matrix
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  • Three-phase decoupling load flow calculation method of power distribution network based on path matrix

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Embodiment Construction

[0019] 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.

[0020] figure 1 It is an overall flowchart of the present invention, specifically comprising the following steps:

[0021] 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 load flow calculation method of a power distribution network based on a path matrix. The method comprises the following steps: firstly, adopting a symmetrical component method to perform sequence component decoupling on a three-phase unbalanced power distribution network to obtain zero sequence, a power distribution sequence network with positive sequence and negative sequence, and adopting a loop-analysis method based on the path matrix to perform one-phase-sequence component load flow calculation to obtain load flows of the three-sequence networks; and secondly, transforming sequence network load flows in a phase component mode by an inverse transformation principle of the symmetrical component method to obtain three-phase load flows. By using the method, a three-phase unbalanced power distribution network system is decoupled into zero sequence, positive sequence and negative sequence networks, so that large matrix manipulation in the three-phase load flow calculation is avoided, the calculated amount is decreased, and the calculation efficiency is improved. The method has the advantages of clear calculation process, simple programming and fast calculation speed. Finally, a 6-busbar test example verifies the correctness and good convergence; and the method is good in generality and practical applicability.

Description

technical field [0001] The invention relates to a three-phase decoupling power flow calculation method of a distribution network based on a road matrix, and belongs to the technical 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 network...

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Application Information

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Patent Type & Authority Applications(China)
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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