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Transient voltage drop acquisition method and device, equipment starting method and device, equipment and medium

A technology of transient voltage drop and acquisition method, which is applied in the direction of AC network voltage adjustment, generator control, power network operating system integration, etc., can solve the problem of low accuracy of transient voltage drop of generators, and achieve low accuracy rate Effect

Active Publication Date: 2020-09-08
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect of low accuracy in the calculation of the transient voltage drop of the generator by the empirical formula in the prior art, and provide a method and device, equipment and medium for obtaining the transient voltage drop and starting the equipment

Method used

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  • Transient voltage drop acquisition method and device, equipment starting method and device, equipment and medium
  • Transient voltage drop acquisition method and device, equipment starting method and device, equipment and medium
  • Transient voltage drop acquisition method and device, equipment starting method and device, equipment and medium

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Embodiment 1

[0065] This embodiment provides a method for obtaining the transient voltage drop of a generator, referring to figure 1 , the method includes the following steps:

[0066] Step S11, acquiring the basic information of the generator and the operation data of the motor; wherein, the basic information includes the model of the generator, the number of parallel connections and the load starting mode.

[0067] Step S12, acquiring a preset rule for transient voltage drop calculation.

[0068] Step S13, calculating the transient voltage drop of the generator according to the preset rules based on the basic information and operating data. Wherein, the preset rules include the first preset rule, the second preset rule and the third preset rule, the first preset rule and the second preset rule characterize the calculation of the transient voltage drop when a single generator is running on the grid rule, the third preset rule represents the calculation rule of the transient voltage drop...

Embodiment 2

[0095] This embodiment provides a starting method for power equipment, refer to image 3 , the method includes the following steps:

[0096] Step S21, using the method of Embodiment 1 to calculate the transient voltage drop of the generator in the power equipment to be detected.

[0097] Step S22, comparing the transient voltage drop with a preset transient voltage drop threshold.

[0098] If the transient voltage drop is greater than the transient voltage drop threshold, the starting mode of the power equipment to be detected is determined as reduced-voltage starting or soft starting.

[0099] If the transient voltage drop is less than the transient voltage drop threshold, the starting mode of the power equipment to be detected is determined as direct starting.

[0100] In this embodiment, the parameters of the generator and the motor are input, and the transient voltage drop is calculated. This voltage drop value is the impact range that the power grid can withstand. If t...

Embodiment 3

[0103] This embodiment provides a device for obtaining the transient voltage drop of a generator, refer to Figure 4 , the acquisition device includes: a first acquisition module 210 , a second acquisition module 220 , and a pressure drop acquisition module 230 .

[0104] The first acquisition module 210 is used to acquire basic information of the generator and operating data of the motor; wherein, the basic information includes the model of the generator, the number of parallel connections and the load starting mode.

[0105] The second obtaining module 220 is configured to obtain a preset rule for transient voltage drop calculation.

[0106] The voltage drop acquisition module 230 is configured to calculate the transient voltage drop of the generator according to preset rules based on basic information and operating data.

[0107] Wherein, the preset rules include the first preset rule, the second preset rule and the third preset rule, the first preset rule and the second p...

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Abstract

The invention discloses a transient voltage drop acquisition method and device, an equipment starting method and device, equipment and a medium. The acquisition method comprises the following steps of: acquiring basic information of a generator and operation data of a motor; acquiring a preset rule of transient voltage drop calculation; and calculating the transient voltage drop of the generator according to the preset rule based on the basic information and the operation data. According to the invention, the defect of low accuracy caused by time-consuming and labor-consuming calculation of the transient voltage drop of the generator by using an empirical formula in the prior art is solved.

Description

technical field [0001] The invention relates to the field of calculation of transient pressure drop, in particular to a method and device, equipment and medium for acquiring transient pressure drop and starting equipment. Background technique [0002] In shipbuilding and marine engineering projects, a large number of alternators are used as the main power supply. When the load is suddenly increased, the voltage fluctuation of the generator will be caused, and the transient voltage drop of the generator needs to be calculated in the design stage. Fully considering the fluctuation characteristics of the generator voltage, the voltage fluctuation characteristics of the system should be within the allowable range, and the adverse effects on the overall operation of the power grid should be avoided or reduced as much as possible. [0003] At present, there is no uniform standard in the method of calculating the transient voltage drop, and the calculation formulas are not the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/10H02P9/08H02J3/14
CPCH02P9/105H02P9/102H02P9/08H02J3/14Y04S20/222Y02B70/3225
Inventor 刘红霞田庆明王关龙
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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