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Auxiliary winding current control method and device for variable speed constant frequency pumped water storage system

An auxiliary winding and pumped energy storage technology, which is applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of low voltage ride-through capability and low starting performance, reduce the rotor current overcurrent wind, and accelerate the transient process of the motor , The effect of accelerating the transient process

Active Publication Date: 2020-08-11
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 pumped water storage system
  • Auxiliary winding current control method and device for variable speed constant frequency pumped water storage system
  • Auxiliary winding current control method and device for variable speed constant frequency pumped water storage system

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Embodiment Construction

[0021] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the application, but should not be understood as a limitation to the application.

[0022] The following describes the auxiliary winding current control method and device of the variable speed constant frequency pumped energy storage system according to the embodiments of the present application with reference to the accompanying drawings.

[0023] figure 1 It is a schematic flowchart of a method for controlling the auxiliary winding current of a variable-speed constant-frequency pumped energy storage system provided by an embodiment of this application. figure 2 This is a schematic stru...

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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] This application relates to the field of electrical control technology, and in particular to a method and device for controlling the auxiliary winding current of a variable speed constant frequency pumped energy storage system. Background technique [0002] With the continuous increase of grid-connected capacity of new energy generating units, higher requirements are put forward for the peak and frequency regulation capabilities of the power grid. The development of pumped storage power stations with functions such as peak regulation, frequency regulation, load tracking and emergency backup has become an inevitable trend . Compared with the traditional fixed-speed pumped energy storage system, the variable-speed constant-frequency pumped energy storage system has significantly improved its performance and economic benefits, and has been widely developed. [0003] At present, the variable-speed constant-frequency pumped energy storage system using some power ...

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Application Information

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Patent Type & Authority Patents(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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