Method for determining available power transmission capacity of each power transmission section in multiple sections

A technology of transmission section and transmission capacity, applied in the direction of circuit devices, electrical components, etc., can solve the problems affecting the progress of ATC calculation, affecting the accuracy of ATC, affecting the flow direction and stability of the whole network, and achieving accurate and guaranteed processing methods. Rationality, calculation model accurate effect

Active Publication Date: 2013-12-18
CENT CHINA GRID +1
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  • Application Information

AI Technical Summary

Problems solved by technology

The mutual constraints of transmission limits between sections are complicated. In the process of calculating the limit operating point, the change of the operation mode due to the adjustment of the unit not only affects the progress of ATC calculation, but also affects the flow direction and stability of the whole network. performance, which will directly affect the accuracy of the final ATC calculation

Method used

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  • Method for determining available power transmission capacity of each power transmission section in multiple sections
  • Method for determining available power transmission capacity of each power transmission section in multiple sections
  • Method for determining available power transmission capacity of each power transmission section in multiple sections

Examples

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Embodiment 1

[0030] A method for determining the available transmission capacity of each transmission section of multiple sections, the method includes the following steps:

[0031] (a) In a power grid with m+n+1 nodes and M transmission sections, m of them are PQ nodes, n are PV nodes, and 1 is a balance node (He Yangzan et al., Power System Analysis (Part 2). Wuhan: Huazhong University of Science and Technology Press, 2002.pp.52-53);

[0032] (b) Set the initial value of the power grid: set the generator active power of the jth node , reactive power , if the jth node does not have a generator, it will be assigned a value of 0; set the load active power of the jth node , reactive power , if the jth node has no load, it will be assigned a value of 0; the power flow result of the power grid converges to , is the nodal phase angle vector , is the phase angle of the jth node, is the node voltage vector , is the voltage of the jth node, is the node active power vector ...

Embodiment 2

[0041] figure 1 It is an 8-machine 36-node system of the China Electric Power Academy (Yan Wei, Dynamic reactive power optimization of AC and DC systems, Automation of Electric Power Systems, Issue 10, 2009). Among them, there are m=32 PQ nodes, n=3 PV nodes, and 1 balance node. Such as figure 1 Divide as shown, area 1 has 3 generators, area 2 has 3 generators, area 3 has 2 generators, calculate the available transmission capacity from area 1 to area 2 and the available transmission capacity from area 3 to area 2.

[0042] The power grid structure and initial power flow results are initialized according to the structural parameters and operating parameters of the 8-machine 36-node system of the China Electric Power Research Institute. Judgment related standard parameter x=20%.

[0043] The cross-section correlation calculation method of Embodiment 1 is used to calculate the cross-section correlation of the basic method, and calculate the correlation between the transmission...

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Abstract

The invention discloses a method for determining an available power transmission capacity of each power transmission section in multiple sections and relates to the field of operation and dispatch of power systems. The method comprises judgment of relevance among the power transmission sections and determination of the available power transmission capacity of the multiple sections, and comprises the following steps of: firstly, judging whether the multiple power transmission sections are relevant or not; then respectively computing the available power transmission capacity of the power transmission sections; and if the power transmission sections are relevant, considering the mutual influence on the available power transmission capacities among the power transmission sections when the available power transmission capacity of each power transmission section is computed. The method provided by the invention has the advantages that the model is accurate, the treatment method is reasonable and accurate, the reliability of the result is ensured, and the method can be applied to dispatching a large-scale internet power grid.

Description

technical field [0001] The invention relates to power grid dispatching, in particular to a method for determining the available power transmission capacity of multiple transmission sections for power grid dispatching. Background technique [0002] Due to the uneven distribution of power resources in our country, long-distance large-capacity power transmission accounts for a large proportion in our country; coupled with the increase in electricity load year by year, some parts of the power grid have been operating on the edge of their safety limits; in addition, the occurrence of various natural disasters , making the power grid close to the limit more crisis-ridden. Therefore, under the limit operation mode of the power grid, the calculation of the available transmission capacity of the power grid is the basis for ensuring the safe and reliable operation of the power grid. Economics of grid operation. [0003] Available Transmission Capability (ATC - Available Transfer Cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
Inventor 陈金富奚江惠徐友平刘超党杰李勇刘天斌洪峰余正峰
Owner CENT CHINA GRID
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