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Load flow calculation method and system for power distribution network

A technology of power flow calculation and calculation method, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as poor processing capacity of ring networks and distributed power sources, achieve excellent convergence characteristics, improve algorithm efficiency, and high computational efficiency Effect

Inactive Publication Date: 2013-08-14
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

The forward pushback method has the advantages of convergence performance not affected by the large R / X ratio of the distribution network, high efficiency, simple programming, less memory usage, and fast operation speed. The disadvantage is the processing ability of the ring network and distributed power supply poor

Method used

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  • Load flow calculation method and system for power distribution network
  • Load flow calculation method and system for power distribution network
  • Load flow calculation method and system for power distribution network

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0028] The distribution network power flow calculation method of the present invention, such as figure 1 shown, including:

[0029] Step S101, reading in network parameters, de-ringing the ring network, and forming a power compensation matrix;

[0030] Step S102, layering the network nodes to form a layered node array;

[0031] Step S103, initializing the network voltage;

[0032] Step S104, calculate the injection current of the terminal node, and calculate the injection current of the non-terminal node in reverse;

[0033] Step S105 , push forward to solve the ...

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Abstract

The invention discloses a load flow calculation method and system for a power distribution network. The method and the system are not influenced by high resistance and reactance ratio of the distribution network on the basis that an element module of the distribution network adopts the forward-back substitution method, and have higher computational efficiency and favorable convergence characteristic. During establishing of a layered node array, a distributed power supply model is introduced, so that the method and the system meet the format of the grid to which a distributed power supply is accessed; and in the injection current computation process of nodes, the optimized open-loop model is utilized to simplify the algorithm and improve the algorithm efficiency, so that the method and the system are suitable for various occasions in the distribution network.

Description

technical field [0001] The invention relates to the technical field of automatic detection, in particular to a method and system for calculating power flow of a power distribution network. Background technique [0002] The power flow algorithms of the distribution network mainly include the improved cow-pull method, the loop impedance method, and the push-back method. Among them, the improved cow-pull method needs to be based on the optimized numbering of nodes, and its convergence performance is not as good as that of the loop impedance method and the forward-backward substitution method; although the loop impedance method has a strong processing ability for the ring network, it needs to form a loop impedance array, even if With the sparse storage technology, the memory usage is still large and the calculation is more complicated. [0003] At present, the power flow calculation of distribution network still mostly adopts forward push-back method. The forward pushback meth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 马明徐柏榆赵继光罗耀强杜波李敏李玎王飞王玲
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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