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A transmission network utilization evaluation method based on power system timing coupling

A power system and utilization rate technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of low utilization rate of power transmission equipment, failure to reflect the real utilization of power transmission lines, and inability to guarantee the utilization rate of power transmission equipment. To achieve the effect of improving the solution efficiency

Active Publication Date: 2020-11-10
XI AN JIAOTONG UNIV
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Problems solved by technology

This method has obvious shortcomings in practical applications. On the one hand, the calculated utilization rate of transmission equipment is very low, and the denominator adopts the thermal stability limit power of the equipment, which cannot reflect the real utilization of the transmission line. On the other hand, the denominator of the calculation formula Partially fixed, it is impossible to guarantee that the utilization rate of transmission equipment obtained for power systems with different characteristics, especially for power systems with strong timing coupling degrees, is reasonable

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  • A transmission network utilization evaluation method based on power system timing coupling
  • A transmission network utilization evaluation method based on power system timing coupling
  • A transmission network utilization evaluation method based on power system timing coupling

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Embodiment Construction

[0101] The present invention provides a method for evaluating the utilization rate of a power transmission network based on the time series coupling of the power system. For the traditional power transmission equipment utilization index calculation method, it is only calculated in the form of operating power / equipment thermal stability limit power. However, the calculation form is fixed without considering the influence of time series coupling on system evaluation. Calculation method of rational utilization rate of main power transmission network based on time series coupling. Compared with the traditional power transmission equipment utilization index calculation method, the present invention meets the purpose of adapting to the power system operation analysis with a strong degree of sequential coupling, and determines the power limit that can be achieved by the actual operation of the power transmission equipment as the goal. On the basis of faults and the fluctuation of loa...

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Abstract

The invention discloses a transmission network utilization rate evaluation method based on power system timing coupling. The method comprises the steps of: obtaining system basic technical data, system operation constraint condition data and system operation prediction data; in a condition that the existing power supply installation and a wire frame are unchanged, considering (N-1) expected faultsof a power transmission device, constructing a reasonable utilization calculation model based on time series analysis, adopting a linear auxiliary method to introduce dual secondary variables for linear reconstruction so as to improve the model solution efficiency; and for a certain typical timing operation scene, maximizing the maximum electric quantity value reached by a power transmission device to be analyzed in the typical scene, selecting a plurality of typical scenes, the operation time frame of each scene being T0, repeating the steps mentioned above, analyzing the typical scenes, constructing a reasonable utilization index calculation formula to evaluate the utilization rate of the transmission network. The transmission network utilization rate evaluation method has the high adaptability to the operation analysis of the power system with high timing coupling.

Description

technical field [0001] The invention belongs to the technical field of power grid planning and operation evaluation, and in particular relates to a power transmission network utilization rate evaluation method based on the time series coupling of power systems. Background technique [0002] In recent years, due to the rapid development of new energy, large-scale new energy power generation has been integrated into the power system, which on the one hand reduces the pressure of power supply and carbon emissions for the power system, and on the other hand increases the randomness of system operation, making the power system safe and reliable. bring great challenges. Since the timing of the output of new energy is very obvious, with the increase of the penetration rate of new energy, the degree of timing coupling of the operation of the power system increases. Therefore, it is particularly important to analyze the operation of the power system, and the rationality of the analy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 王建学杨钤林帆张耀
Owner XI AN JIAOTONG UNIV
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