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Power grid side voltage fluctuation suppression system and method and storage medium

A voltage fluctuation and grid-side technology, which is applied in the field of grid-side voltage fluctuation suppression system, can solve the problems of low-frequency fluctuation of power supply voltage on the grid side, affect the normal operation of equipment, damage equipment, etc., and achieve the effect of suppressing the fluctuation of grid-side voltage

Pending Publication Date: 2022-07-05
SIEMENS ELECTRICAL DRIVES SHANGHAI
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Problems solved by technology

If the capacity of the grid-side power supply is not large enough, the temperature rise test will cause low-frequency fluctuations in the grid-side power supply voltage. Excessive fluctuations will damage the equipment powered by the grid or affect the normal operation of the equipment powered by the grid.

Method used

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  • Power grid side voltage fluctuation suppression system and method and storage medium
  • Power grid side voltage fluctuation suppression system and method and storage medium
  • Power grid side voltage fluctuation suppression system and method and storage medium

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Embodiment Construction

[0058] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the following examples.

[0059] figure 1 is a schematic diagram of the application scenario of the grid-side voltage fluctuation suppression system of the present invention, please refer to figure 1 The grid-side voltage fluctuation suppression system of the present invention is applied to the frequency converter 103 that performs the temperature rise test on the asynchronous motor 106. The frequency converter 103 is provided with a PWM rectifier 104 and a PWM inverter 105. The inverter 103 is electrically connected to the ideal grid 101 through the common connection point 102 , the asynchronous motor 106 is electrically connected to the inverter 103 , and the load 107 is electrically connected to the ideal grid 101 . exist figure 1 , the load 107 is other electrical equipment, e is the ideal gr...

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Abstract

The invention provides a power grid side voltage fluctuation suppression system and method and a storage medium. The power grid side voltage fluctuation suppression system comprises a voltage acquisition module, a voltage phase locking module, a current acquisition module, a coordinate transformation module, a DC voltage acquisition module, a DC bus voltage regulation module, an active current regulation module, a reactive current given value calculation module, a reactive current regulation module, an inverse coordinate transformation module and a PWM modulation module. According to the power grid side voltage fluctuation suppression system and method and the storage medium, the fluctuation of the power grid side voltage during the temperature rise test of the asynchronous motor can be suppressed, and other loads powered by the power grid are effectively prevented from being damaged.

Description

technical field [0001] The present invention relates to the technical field of motor testing, and in particular, to a system, method and storage medium for suppressing voltage fluctuations on the grid side. Background technique [0002] The temperature rise test of asynchronous motor is to determine the working temperature of the stator winding and the temperature rise of some parts of the motor higher than the temperature of the cooling medium when running under rated load conditions. The temperature rise of the motor determines the service life of the motor insulation, so the temperature rise test plays a very important role in the quality of the motor. With the increase of the capacity and type of asynchronous motors, due to the limitation of the capacity of the existing test equipment, many asynchronous motor products cannot be subjected to the direct load method temperature rise test according to the national standard when they leave the factory. . [0003] The temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02P27/04
CPCH02J3/241H02P27/04
Inventor 巩学军
Owner SIEMENS ELECTRICAL DRIVES SHANGHAI
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