Variable speed unit coordination control method based on radial basis function interpolation model

Abstract

The invention discloses a variable speed unit coordination control method based on a radial basis function interpolation model. The variable speed unit coordination control method comprises the specific steps of: adopting a radial basis function interpolation method for interpolating, fitting and deducing a coordination control mathematical model of a variable speed pumped storage unit under a power generation condition and a water pumping condition according to a unit operating characteristic curve; acquiring a unit operating condition state signal, a unit active power set value, a current water head value and a system frequency value; automatically calculating a corresponding unit optimal rotation speed and a corresponding optimal guide vane open degree value; and issuing the unit optimal rotation speed and the optimal guide vane opening value to an AC exciter and a speed regulator, wherein the speed regulator adjusts a unit guide vane open degree, and the AC exciter controls an excitation current, thereby realizing rapid adjustment of active power and rotation speed of the unit. The variable speed unit coordination control method accelerates the response speed of the variable speed pumped storage unit according to the grid load requirements for carrying out continuous, rapid and precise load regulation, and realizes the primary frequency coordinated control function.

Description

technical field

[0001] The invention relates to a coordinated control method of a variable-speed unit based on a radial basis function interpolation model, and belongs to the technical field of automatic control of electric power systems. Background technique

[0002] With the development of my country's cross-regional interconnected power grids, factors such as large-capacity transmission channel failures and new energy power fluctuations have brought new challenges to power grid backup control methods. pose a greater threat.

[0003] The pumped storage power station has the functions of peak-shaving and valley-filling, frequency modulation and phase modulation, and emergency backup functions. It is an effective means to solve the peak-shaving and safe and reliable operation of the power grid. However, at present, all pumped storage units are fixed-speed pumped storage units. Under the working condition of the pump, only the control mode of "start-full load-stop" can be ado...

Images