A calculation system and method for theoretical action electric quantity of primary frequency modulation of hydroelectric unit
A hydroelectric unit, theoretical technology, applied in calculation, data processing applications, instruments, etc., can solve problems such as inaccurate theoretical action integral power
Active Publication Date: 2019-10-15
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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This shows that it is not accurate to use the frequency-time relationship curve to calculate the theoretical action integral power
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[0069] The core of the present invention is to provide a calculation system for the theoretical action power of the primary frequency modulation of the hydroelectric unit. According to the simulation model of the hydroelectric unit, the theoretical active power of the hydroelectric unit is obtained, and the relationship between the theoretical active power and time is used to obtain the theoretical action integral power. The theoretical action integral power obtained by this method is more accurate. In addition, the hydraulic turbine prime mover model also considers the corresponding relationship between the theoretical active power and the guide vane opening when calculating the theoretical active power, so that the theoretical action integral power obtained is more accurate. Another core of the invention is to provide a method for calculating the theoretical action power of a hydroelectric unit for primary frequency modulation.
[0070] In order to make the purpose, technical...
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The invention discloses a system and method for calculating the theoretical motion electric quantity of the primary frequency modulation of a hydroelectric generating set, and the system comprises an electronic adjuster model which obtains a target guide vane opening signal of a hydraulic turbine set according to frequency deviation, active power deviation or guide vane opening deviation; a guide vane execution mechanism model which obtains an actual guide vane opening signal according to the target guide vane opening signal; and a water turbine prime motor model which obtains a theoretical active power according to the actual guide vane opening signal, wherein the water turbine prime motor model gives consideration to the impact from rigid water attack, and also gives consideration to the corresponding relation between the theoretical active power and the guide vane opening; and a theoretical motion integration electric quantity calculating module which obtains the theoretical motion integration component 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 relational expression of the theoretical motion integration electric quantity. The theoretical motion integration electric quantity obtained in the above mode is closer to the actual motion integration electric quantity, and is more accurate.
Description
technical field [0001] The invention relates to the technical field of primary frequency modulation of hydroelectric units, in particular to a calculation system and method for the theoretical operating power of 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 serv...
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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 李玺徐广文黄青松姚泽
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID