A multi-dimensional space thermal stability security region representation method based on correlation model
A related model and multi-dimensional space technology, applied in the direction of instruments, structured data retrieval, data processing applications, etc., can solve problems such as difficulties in displaying security domains
Active Publication Date: 2019-03-29
TIANJIN UNIV +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: based on the basic theory of power system thermal stability safety domain, provide a safety domain display method that can be applied in large-scale power systems, which overcomes the security domain caused by too many generator nodes in conventional situations Demonstrate difficult problems and provide a strong reference for subsequent dispatchers to carry out safety control
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[0037] A multi-dimensional space thermal stability security region representation method based on an association model, comprising the following steps:
[0038] Step 1. Obtain the upper limit of active output, the lower limit of active output of the system nodes of the specified power system, the impedance value of the line between the system nodes and the upper limit of transmission power. The upper and lower safety limits of the generator nodes are based on the given data of the power plant and the operation of the system The upper and lower limits of the active power of the line nodes are determined according to the parameters of the corresponding grid equipment;
[0039] Step 2. Select the system section, construct the node-to-line correlation model, and obtain the node-to-section correlation coefficient; the correlation model construction method is as follows:
[0040] 2.1 Select any m lines in the actual power grid as the research section, and calculate the active power ...
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The invention discloses a multi-dimensional space thermal stability security region representation method based on a correlation model, which comprises the following steps: (1) obtaining an active output upper limit, an active output lower limit and a line impedance value between system nodes of a designated power system; (2) selecting any number of lines in the system as the system cross-section,calculating the sensitivity value of all system nodes to these lines, constructing the correlation model of nodes to lines, and obtaining the correlation coefficient of nodes to the cross-section; 3,selecting that key nodes by using the correlation coefficient of the middle point to the section in the step 2, constructing a mathematical model of the thermal stability safety region of the key nodes, and calculating the upper and low limits of the active safety of the nodes to the section; (4) drawing the thermal stability security region of the electric power system in the combined form of the bar chart and the broken line chart. The invention overcomes the problem of displaying the security region caused by too many generator nodes under the conventional condition, and provides a powerful reference for the subsequent dispatcher to carry out the security control.
Description
technical field [0001] The invention relates to a method for drawing a thermal stability security domain of a power system, in particular to a method for expressing a thermal stability security domain in a multi-dimensional space based on an association model. Background technique [0002] The rapid economic development makes the load level of the power system increase rapidly, and more and more lines or transformers are running close to the limit of thermal stability. Due to the characteristics of the grid structure and the arrangement of the operation mode during the transition period of the rapid development of the power grid, thermal stability constraints have become the key constraints for the safe operation of the power grid. The thermal security region (THSR) of the power system is a collection of nodes injected into the power space or decision space that satisfy the current limit constraints of all transmission lines in the system, and it only considers the thermal s...
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IPC IPC(8): G06F16/26G06Q50/06
CPCG06Q50/06
Inventor 曾沅张风彬贾凡秦超苏寅生刘春晓李鹏马骞李斌
Owner TIANJIN UNIV