System and method for assessing contribution electric quantity of primary frequency modulation of hydroelectric generating set

Abstract

The invention discloses a system and a method for assessing contribution electric quantity of primary frequency modulation of a hydroelectric generating set. The method comprises the following steps of utilizing a simulation model of the hydroelectric generating set to obtain theoretical active power; then, enabling a theoretical action integral electric quantity calculation module to obtain the theoretical action integral electric quantity of the primary frequency modulation of the hydroelectric generating set according to the theoretical active power, the time corresponding to the theoretical active power, and the theoretical action integral electric quantity relation, and obtain the actual action integral electric quantity of the primary frequency modulation of the hydroelectric generating set according to the actual power of the hydroelectric generating set, and the time corresponding to the actual power; enabling an assessing module to calculate the ratio of actual action integral electric quantity and theoretical action integral electric quantity, and judging whether the ratio is greater than the threshold value or not, wherein when the ratio is greater than the threshold value, the primary frequency modulation of the hydroelectric generating set passes through assessing; when the ratio is not greater than the threshold value, the primary frequency modulation does not pass through assessing. The system has the advantages that the theoretical action integral electric quantity obtained by the type is more approximate to the actual action integral electric quantity, and the electric quantity is more accurate; the assessing result is more accurate, and the false rate is low.

Description

technical field [0001] The invention relates to the technical field of primary frequency modulation of hydroelectric units, in particular to a system and method for assessing the amount of electricity contributed by primary frequency modulation of hydroelectric units. Background technique [0002] At present, among the factors affecting power quality, grid frequency accounts for the main part. The primary frequency regulation of hydropower units means that when the grid frequency fluctuates, the speed control system automatically adjusts the guide vane opening according to the frequency difference between the grid frequency and the rated frequency, and changes the output of the unit to adapt to the load change. As one of the basic auxiliary services, the primary frequency regulation service is a service that the power grid requires the power plant to provide. If the power plant cannot provide a frequency regulation service due to its own reasons or the frequency regulation ...

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Problems solved by technology

This shows that it is not accurate to use the frequency-time relationship curve to calculate the theoretical action integral power

If the primary frequency modulation of the power grid is evaluated based on the theoretical action integral power calculated in this way, it is easy to appear that the primary frequency modulation of the hydroelectric unit actually operates correctly, but the integral power contributed during the action process is recorded as not meeting the requirements. In this case, the assessment error rate is high

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