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Control method of generator motor of variable speed pumped storage power station

A pumped-storage power station, generator motor technology, applied in the direction of controlling the generator through the change of the magnetic field, controlling the generator, controlling the system, etc., can solve unstable power supply, affect the quality of power, power system security, power system voltage and frequency fluctuations, etc. question

Active Publication Date: 2019-12-06
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Although wind power and solar power are non-polluting energy sources, they are unstable power sources
After a certain scale of wind power and photovoltaics are connected to the grid, the voltage and frequency of the power system will fluctuate due to unstable power generation, which will affect the quality of power and the safety of the power system

Method used

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  • Control method of generator motor of variable speed pumped storage power station
  • Control method of generator motor of variable speed pumped storage power station
  • Control method of generator motor of variable speed pumped storage power station

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0038] In the variable speed pumped storage generator motor, the power winding and the control winding have no direct coupling relationship, because we can split the generator motor into two parts: power and rotor coupling circuit, rotor and control coupling circuit, and then through its rotor The current and frequency conversion combine these two parts, such as figure 2 shown. In order to clarify the meaning of its various parts, the basic equations of the two parts of the generator and motor are listed here.

[0039] In the power and rotor coupling circuit, the basic equation is:

[0040]

[0041] In the rotor and control coupling circuit, the basic equation is:

[0042]

[0043] Among them, V, I, R, Λ, ω represent the...

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Abstract

The invention provides a control method of a generator motor of a variable speed pumped storage power station. The control method is characterized by comprising the following steps: the generator motor obtains the numerical value of the electromagnetic torque from the mathematical model and the design parameters of the generator motor under the pumping condition and then performs hysteresis comparison with the given value of the electromagnetic torque to obtain the difference value deltaTe; a position angle thetas2 is obtained through the calculation of the flux linkage of the control winding;the difference value deltapsis2 is obtained by comparing the hysteresis between the control winding flux linkage and the given flux linkage; then deltaTe, deltapsis2 and thetas2 are used for giving the control winding voltage vectors; and the given value of the control winding current is obtained by the given active and reactive closed-loop PI regulation of the generator motor under the power generation condition and then the control winding voltage is calculated through the current inner loop PI regulation to be directly inputted to the motor control winding.

Description

technical field [0001] The invention relates to the technical field of a variable-speed pumped-storage generator motor, in particular to a control method for a generator-motor of a variable-speed pumped-storage power station. Background technique [0002] Although wind power and solar power are non-polluting energy sources, they are unstable power sources. After a certain scale of wind power and photovoltaics are connected to the grid, the voltage and frequency of the power system will fluctuate due to unstable power generation, affecting power quality and power system security. [0003] The variable speed pumped storage system has attracted more and more attention because of its fast speed response and flexible adjustment. Compared with the conventional pumped storage unit, the speed of the variable speed unit can be dynamically adjusted within a certain range, the range of power and water head can be varied, and it can always maintain high efficiency and stable operation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/30H02J3/28H02J3/38H02P101/10
CPCH02J3/28H02P9/305H02P2101/10
Inventor 谢向荣陈昕刘海波赵鑫张鹏敖昕李成子张旭张涛金乾
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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