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A Transformation Ratio Optimization Method of Transformer in Monthly Operation Mode Based on Enumeration Combination and Linear Programming

An operation mode and linear programming technology, which is applied in the direction of AC networks, AC network circuits, electrical components, etc. with the same frequency from different sources, to achieve good global convergence, reduce scale, and narrow the search interval.

Active Publication Date: 2021-03-16
CHINA SOUTHERN POWER GRID COMPANY +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solving the dynamic reactive power optimization problem through the optimal power flow can give multiple reactive power optimization results, but the number of variables and constraints are many times larger than the static reactive power optimization problem, and there is still global convergence when applied to large-scale power systems The problem

Method used

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  • A Transformation Ratio Optimization Method of Transformer in Monthly Operation Mode Based on Enumeration Combination and Linear Programming
  • A Transformation Ratio Optimization Method of Transformer in Monthly Operation Mode Based on Enumeration Combination and Linear Programming
  • A Transformation Ratio Optimization Method of Transformer in Monthly Operation Mode Based on Enumeration Combination and Linear Programming

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] An embodiment of the present invention, its steps are as figure 1 Shown:

[0036] figure 1 Step 1 in the above describes the calculation of the reactive power optimization model under the peak and valley operation mode of the next month through the optimal power flow, and the reactive power of the generator, the reactive power of the capacitive reactor and the transformation ratio of the transformer are calculated according to the optimal power flow. Optimized grid operation mode;

[0037] figure 1 Step 2 in the above describes that the difference between the peak and valley operation modes in the optimization result is greater than the set threshold value k thres The transformer joins the set T C , if T C is empty, go to step 7); otherwise, go to step 3);

[0038] figure 1 Step 3 in the description is to d...

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Abstract

The invention, which belongs to the technical field of the power system and automation, discloses a monthly operating type transformer ratio optimization method based on enumeration combination and linear programming. The location of a tap of a transformer enabling the total transmission losses of two operating ways to be minimized is calculated; reactive power optimization models in next-month peak and valley operating modes are calculated respectively by an optimal power flow; a transformer with a transformation ratio difference and a transformation ratio searching zone are determined; transformer gear combination with the minimized total transmission losses in peak and valley operating modes is determined by enumeration combination; and with total transmission loss minimization in peakand valley modes as an objective function, optimal transformation ratios of the transformer in peak and valley modes are calculated by a linear planning model established based on sensitivity to the active transmission losses by the transformation ratio of the transformer. Therefore, the scale of the dynamic reactive power optimization problem is reduced and the good global convergence is realized.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular the invention relates to a transformation ratio optimization method of a transformer in a monthly operation mode based on enumeration combination and linear programming. Background technique [0002] Reactive power optimization is to change the power flow distribution of the system and reduce the network loss of the system by using reactive power compensation devices, adjusting the tap position of the transformer and changing the terminal voltage of the generator under the premise of ensuring the power quality of the system. Since the taps of the transformers generally do not change within a period of one month, it is necessary to determine in advance the tap positions of the transformers in the next month through the monthly operation arrangement. The monthly operation mode includes two modes of peak and trough operation, the power grid structure is slightly dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/20
Inventor 姚海成徐伟鲍颜红苏寅生彭慧敏张金龙任先成苗本琳刘韶峰袁虎玲周海锋洪珊珊
Owner CHINA SOUTHERN POWER GRID COMPANY
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