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

A technology of coordinated control and interpolation model, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problem of not being able to solve the coordinated control of AC excitation and governor of variable-speed pumped-storage units, and achieve rapid adjustment of active power. Effect

Active Publication Date: 2019-04-19
NANJING NARI GROUP CORP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the active power control method of the conventional pumped storage unit cannot solve the problem of coordinated control between the AC excitation and the governor of the variable speed pumped storage unit.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Coordinated control simulation of variable speed pumped storage units under power generation conditions

[0085] Build a simulation model for coordinated control of variable-speed pumped storage units under power generation conditions, such as image 3 shown.

[0086] The random function is used to simulate the random change of the system frequency f, and the ramp signal is used to simulate the change of the water head H under the power generation condition of the variable speed unit. The simulation results are as follows Figure 4 with Figure 5 shown.

[0087] Figure 4 (a) is the random variation curve of frequency, Figure 4 (b) is the unit input curve under the condition of random frequency change, Figure 4 (c) is the rotation speed and guide vane opening curve of the unit under the condition of random frequency change.

[0088] Figure 5 (a) is the change curve of water head, Figure 5 (b) is the unit output curve under the condition of water head change, ...

Embodiment 2

[0092] Coordinated control simulation of variable speed pumped storage units under pumping conditions

[0093] Build a simulation model for the coordinated control of variable-speed pumped-storage units under pumping conditions, such as Image 6 shown.

[0094] The random function is used to simulate the random change of the system frequency f, and the ramp signal is used to simulate the change of the water head H under the power generation condition of the variable speed unit. The simulation results are as follows Figure 7 with Figure 8 shown.

[0095] Figure 7 (a) is the random variation curve of frequency, Figure 7 (b) is the unit input curve under the condition of random frequency change, Figure 7 (c) is the rotation speed and guide vane opening curve of the unit under the condition of random frequency change.

[0096] Figure 8 (a) is the change curve of water head, Figure 8 (b) is the input force curve of the unit under the condition of water head change, ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 姜海军徐青张高高高苏杰王惠民衣传宝戎刚单鹏珠
Owner NANJING NARI GROUP CORP
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