Transmission network utilization rate evaluation method based on power system timing coupling

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 grid planning and operation evaluation, and specifically relates to a transmission grid utilization rate evaluation method based on power system timing coupling. Background technique [0002] In recent years, due to the rapid development of new energy, large-scale new energy power generation has been connected to the power system. On the one hand, it reduces the pressure on power supply and carbon emissions for the power system. On the other hand, it also increases the randomness of the system operation and provides safe and reliable operation of the power system. Bring huge challenges. As the timing of new energy output is particularly evident, as the penetration rate of new energy increases, the degree of timing coupling of power system operation increases. Therefore, it is particularly important to analyze the operation of the power system, and the rationality of the analysis method determines the referenc...

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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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