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Method and device for power flow calculation of large-scale distribution network

A technology of power flow calculation and distribution network, which is applied to AC networks with the same frequency from different sources, etc., can solve the problems of poor flexibility in solving sub-networks and low efficiency of parallel computing, so as to improve the efficiency of parallel computing of power flow and avoid wasteful calculations Efficiency, the effect of improving the efficiency of parallel computing

Active Publication Date: 2020-10-13
CHINA AGRI UNIV
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Problems solved by technology

[0005] In order to solve the problems of low efficiency of parallel computing and poor flexibility of sub-network solution existing in the prior art, the embodiment of the present invention provides a large-scale distribution network power flow calculation method and device

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  • Method and device for power flow calculation of large-scale distribution network
  • Method and device for power flow calculation of large-scale distribution network
  • Method and device for power flow calculation of large-scale distribution network

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] For ease of understanding, terms involved in the embodiments of the present invention are explained first.

[0033] Node: The confluence point of several components. The characteristic of the node is that each instantaneous voltage is equal, and the node is basically the same as the point where the short circuit occurs in the system. The po...

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Abstract

The embodiment of the invention provides a load flow calculation method and device for a large-scale power distribution network, and the method comprises the steps: decomposing a target power distribution network into a plurality of sub-networks, and obtaining an equation for solving a contact branch current value between the sub-networks; calculating constant impedance, constant current and constant power parameters of each subnet ZIP load model; calculating a node admittance matrix of each subnet according to the constant impedance parameters, and improving the node admittance matrix; calculating the node injection current of the current iteration according to the node voltage of the current iteration and the constant current and constant power parameters; obtaining the current iterationcontact branch current according to the improved node admittance matrix, the current iteration node injection current and an equation used for solving the contact branch current between the subnets;obtaining the node voltage phasor of the next iteration according to the contact branch current of the current iteration if the difference value between the contact branch current of the previous iteration and the next iteration is greater than the convergence criterion. According to the embodiment of the invention, the efficiency and flexibility of load flow parallel computing are considered.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power system analysis and calculation, and more specifically, to a method and device for calculating power flow in a large-scale distribution network. Background technique [0002] With the continuous improvement of the automation level of the power system, the distribution system, as an important part of the power network, has been paid more and more attention in the power system, especially in the calculation of the power flow of the distribution network in the optimization of the distribution network. With the massive access of distributed power sources, electric vehicles and other equipment, the distribution network has gradually changed from a traditional passive network to an active active distribution network with a more complex structure. Requirements for real-time calculation of distribution network. Therefore, it has become the key to study large-scale power distribution s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
Inventor 唐巍陈璐王越张博蔡永翔王照琪张涵
Owner CHINA AGRI UNIV
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