Rapid evaluation method based on primary frequency modulation

Abstract

The invention relates to a rapid evaluation method based on primary frequency modulation. A 15-second response value and a theoretical value are calculated by adopting a mean value of frequency changes of first 15 seconds as a reference, and the hysteresis of fast response of the frequency of a unit is considered; and a 30-second response value and a theoretical value are calculated by adopting apeak value of frequency changes of first 30 seconds as a reference, so that an analysis error caused by frequency falling is avoided. According to the method, in order to avoid frequent calculation, according to conventional unit frequency modulation test characteristics, a fast frequency modulation characteristic can be fully embodied after 15 seconds, so that the shortest length of an evaluationtime period is set, and the reasonability of statistical data can be improved; calculation time of the unit exceeds 15s and does not reach 30s, and only 15s calculation data is used for replacing twopieces of data; and if a sampling duration is longer than 30s, current calculation can be completed only after the actual frequency falls back into a dead zone, and a theoretical action value takes the peak value of the whole time period for reference.

Description

technical field [0001] The invention belongs to the technical field of rapidity evaluation of frequency modulation, and in particular relates to a rapidity evaluation method based on primary frequency modulation. Background technique [0002] With the increase of load and the increasing scale of the power grid, under the new situation of the interconnection of UHV power grid and regional power grid, the primary frequency regulation function of the unit can quickly respond to sudden changes in power grid power, and can significantly improve the frequency quality of the power grid. In the safe and stable operation of the power grid play a pivotal role. For a frequency modulation rapidity evaluation, relevant performance analysis work has not been carried out at present. A frequency modulation test analysis is mainly based on the summary of test data, which fails to reflect the real-time operation of the unit, especially during the frequency fluctuation period of the power grid...

AI Technical Summary

Problems solved by technology

For a frequency modulation rapid evaluation, relevant performance analysis has not been carried out at present. A frequency modulation test analysis mainly relies on the summary of test data, which fails to reflect the real-time operation of the unit, especially during the period of power grid frequency fluctuations, it is impossible to use real and effective data for frequency modulation rapidity Analysis, the long data collection stage and the layer-by-layer reporting mechanism miss the best time to analyze data. Data analysis may have subjective factors, which causes many difficulties for a frequency modulation analysis. Based on this, a rapid evaluation based on a frequency modulation is proposed. method to provide important data for the scientific analysis of the rapidity of generator set frequency modulation

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