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Auxiliary winding current control method and device for variable-speed constant-frequency water pumping energy-storage system

A technology of auxiliary winding and pumping energy storage, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of low voltage ride-through capability, low starting performance, etc., to reduce the rotor current overcurrent wind, accelerate the transient process of the motor , the effect of suppressing the vibration of the stator flux linkage

Active Publication Date: 2019-04-26
TSINGHUA UNIV +1
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Problems solved by technology

[0004] This application proposes an auxiliary winding current control method for a variable-speed constant-frequency pumped energy storage system, which is used to solve the problems of low start-up performance and weak low-voltage ride-through capability of the variable-speed constant-frequency pumped energy storage system in the related art

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  • Auxiliary winding current control method and device for variable-speed constant-frequency water pumping energy-storage system
  • Auxiliary winding current control method and device for variable-speed constant-frequency water pumping energy-storage system
  • Auxiliary winding current control method and device for variable-speed constant-frequency water pumping energy-storage system

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[0021] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0022] The method and device for controlling the auxiliary winding current of the variable-speed constant-frequency pumped energy storage system according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0023] figure 1 It is a schematic flow chart of an auxiliary winding current control method for a variable-speed constant-frequency pumped water storage system provided in an embodiment of the present application. figure 2 It is a schematic structural diag...

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Abstract

The invention provides an auxiliary winding current control method and device for a variable-speed constant-frequency water pumping energy-storage system. The auxiliary winding current control methodcomprises the following steps: a current working stage of the variable-speed constant-frequency water pumping energy-storage system is determined; and an auxiliary winding current generated by the variable-speed constant-frequency water pumping energy-storage system is controlled according to the current working stage. According to the auxiliary winding current control method, by using an auxiliary winding structure and controlling the auxiliary winding current when the system is in the different stages, the problems of small torque, low efficiency and large heating in the traditional resistorshort-circuit starting process are avoided, especially heavy-load starting of the system is facilitated, in the low-voltage crossing process of the system, stator flux linkage oscillation is inhibited, the motor transient process is accelerated, the overcurrent risk of a rotor current is lowered, and the low-voltage crossing ability is improved.

Description

technical field [0001] The present application relates to the technical field of electrical control, in particular to a method and device for controlling the auxiliary winding current of a variable-speed constant-frequency pumped water storage system. Background technique [0002] With the continuous increase of the grid-connected capacity of new energy generating units, higher requirements are put forward for the peak-shaving and frequency-regulating capabilities of the power grid. It is an inevitable trend to develop pumped storage power stations with functions such as peak-shaving, frequency-regulating, load-following and emergency backup. . Compared with traditional fixed-speed pumped energy storage systems, variable-speed constant-frequency pumped energy storage systems have significantly improved performance and economic benefits, and have been widely developed. [0003] At present, the variable-speed constant-frequency pumping energy storage system using part of the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/10H02P1/26
CPCH02P1/26H02P23/10
Inventor 姜新建孙旭东马宏伟
Owner TSINGHUA UNIV
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