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Constant value adaptive selection method of phase selection and switching-on device of alternating-current filter switch

An AC filter and phase-selective closing technology, which is applied in instruments, data processing applications, biological neural network models, etc., can solve the problem that the phase-selective closing device cannot accurately predict the closing time.

Inactive Publication Date: 2017-10-24
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to propose an adaptive selection method for the fixed value of the AC filter switch phase selection closing device, which solves the problem that the phase selection closing device in the prior art cannot accurately predict the next AC filter switch closing In order to solve the problem of closing time of the operation, the setting of the fixed value of the switch phase selection closing device of the present invention changes adaptively with the change trend of the actual closing time, and can accurately control the switch to close at the ideal phase

Method used

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  • Constant value adaptive selection method of phase selection and switching-on device of alternating-current filter switch
  • Constant value adaptive selection method of phase selection and switching-on device of alternating-current filter switch
  • Constant value adaptive selection method of phase selection and switching-on device of alternating-current filter switch

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Embodiment 1

[0092] Embodiment 1: Here, the 551 AC filter circuit breaker of Congxi Converter Station is used as an application example, such as figure 1 As shown, a schematic flow chart of the self-adaptive selection method for the fixed value of the AC filter switch phase selection and closing device of the present invention includes the following steps:

[0093] S11. Carry out a mechanical characteristic test on the 551 AC filter circuit breaker, and obtain closing times for 5 times. Taking the expected break-through time as 0.4ms and the secondary circuit delay as 0.1ms, the initial values ​​of the three-phase fixed values ​​of the phase selection closing device are obtained as 60.5ms, 60.5ms, and 60.8ms respectively;

[0094] S12. Select the national intelligent 3YL phase-selection closing device for the AC filter switch of the West Converter Station, and set the fixed value of the 551 switch phase-selected closing device. The fixed value is the initial value obtained in step S11;

...

Embodiment 2

[0125]The 551 AC filter of Congxi Converter Station is equipped with a national intelligent 3YL phase-selection closing device. Before the 551 AC filter is put into operation, the mechanical characteristic test of the opening and closing of the switch is carried out, and the average value of the three-phase closing time of the 551 switch is obtained. , taking the expected break-through time as 0.4ms and the secondary circuit delay as 0.1ms, the initial values ​​of the phase selection closing device are obtained as 60.5ms, 60.5ms, and 60.8ms. The three-phase average value was used as the initial value of the 551 AC filter switch phase selection closing device, and the 551 AC filter circuit breaker was put into operation. On April 3, 2017, the phase selection and closing device was recorded and read, and the read opening and closing time is shown in Table 1.

[0126] Table 1 Wave recording data of 551 switch 3YL device

[0127]

[0128] Establish the GNNM(1,1) gray neural ne...

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Abstract

The invention discloses a constant value adaptive selection method of the phase selection and switching-on device of an alternating-current filter switch. The method includes the following steps that: the initial value of the constant value of the phase selection and switching-on device is selected; historical actual switching-on time before the next switching on of one set of alternating-current filter switch is combined into a switching-on time sequence X <(0)>, and one-step accumulative summation operation is performed on the X <(0)>, so that an accumulative summation sequence can be generated, and the accumulative summation sequence is adopted as a training sample; a GNNM (1,1) gray neural network model is established; particle swarm optimization is utilized to perform training by using the training sample; with a time sequence number corresponding the next switching on of the alternating-current filter switch adopted as input, one-step accumulative subtraction is performed on network output, so that the switching-on time predicted value of the next switching on can be obtained through restoration; and the predicted value is set to be a new constant value. With the constant value adaptive selection method of the invention adopted, the setting of the constant value of the phase selection and switching-on device can change adaptively with the change trend of actual switching-on time, the alternating-current filter three-phase switch can be switched on near voltage zero-crossing points, and transient impact can be reduced. The method has the advantages of simple steps, fast network convergence and high prediction accuracy.

Description

technical field [0001] The invention relates to the field of high-voltage direct current main equipment, in particular to a method for self-adaptive selection of a fixed value of an AC filter switch, phase selection and closing device. Background technique [0002] With the expansion of the grid scale, the construction and development of the power system, the number of power equipment is increasing, and various new equipment is put into operation, the reliability of the DC main equipment has become the guarantee for the safe operation of the power system. [0003] The group AC filter of the converter station not only undertakes the filtering work of the system, but also provides a certain reactive capacity, which is one of the important equipment of the converter station. Switching operations and faults in filters create transient stresses on their components that can damage components if the designed transient ratings are exceeded. The filter group switch is equipped with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06G06N3/00G06N3/04
CPCG06N3/006G06Q50/06G06N3/045
Inventor 罗新谭华安黄学民刘春涛谷裕王耀谢超叶建铸齐向东陈为庆王帅伊杨洋
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION