A fast active power adjustment method for virtual small hydropower groups

Abstract

The invention discloses a method for quickly adjusting the active power of a virtual small hydropower group. The specific implementation process is as follows: real-time scanning and receiving real-time planned base point power and AGC adjustment power, which are issued to each small hydropower station when the adjustment command is received; The active power of the tie line, when the active power transmitted by any tie line is close to the stability limit, the received active power adjustment command is arranged according to the priority of the sensitivity of each small hydropower station to the tie line; when the active power transmitted by no tie line reaches the stability limit, Then calculate the ratio of the active power fluctuation of each tie line relative to the entire section, and calculate the ratio and the sensitivity product of each small hydropower station to the tie line, and add the products of each tie line to get the product index of the fluctuation amount and sensitivity of each small hydropower station to the section , arrange the distribution priority of the active power regulation command according to the size of the index. The invention can quickly respond to the scheduling and issue an active power adjustment command, and can more effectively suppress the active power fluctuation of the outgoing section 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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