Active power quick regulation method for virtual small hydropower stations

Abstract

The invention discloses an active power quick regulation method for virtual small hydropower stations. The method comprises the steps of scanning and receiving the power and AGC regulation power of a real-time planning basic point in real time, and sending a received regulation instruction to each small hydropower station; detecting the active power of each tie line of a transmission section, setting up the distribution amounts by the active power regulation instruction received according to the sensitivity priority of each small hydropower station to the tie line when the transmission active power of any tie line approaches the stability limit; calculating the active power fluctuation quantity ratio of each tie line relative to the entire section, calculating the product of the ratio and the sensitivity of each small hydropower station to the tie line, summing the products of all the tie lines to obtain the index of the product of the section fluctuation quantity and sensitivity of each small hydropower station, and setting up the distribution priority of active power regulation instructions according to the values of the indexes. The method can quickly make a response, schedule and send active power regulation instructions, and can effectively restrain the transmission active power fluctuation caused by wind power.

Description

technical field [0001] The invention relates to the technical field of operation and control of electric power systems containing new energy, in particular to a method for quickly adjusting the active power of a virtual small hydropower group. Background technique [0002] The actual power grid in the present invention is an important energy base composed of resources such as coal, water, wind energy, solar energy, and coal-bed methane. Among the many power sources in the grid, thermal power and large-scale hydropower dominate, while wind power and small hydropower resources are also extremely abundant, showing the characteristics of abundant wind power resources and large-scale small hydropower. Therefore, the connection of large-scale intermittent wind power and small run-of-river hydropower will have a greater impact on the power grid. Using the active power regulation capability of new energy power stations is an effective means to suppress the impact of intermittent pow...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned active power adjustment methods of new energy power stations, there are problems such as loss of active power output of the power station, increase in equipment investment costs, and lack of rapid adjustment, and have not been widely used.

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