Apparatus and method for realizing partial discharging monitoring of switch based on unconventional mutual inductor
An unconventional transformer and partial discharge monitoring technology, which is applied in the direction of electrical devices, measuring devices, circuit devices, etc., can solve the problems of not being able to access SV signals, not being able to obtain voltage phases through voltage extraction devices, etc., to reduce power outages The effect of maintenance times and maintenance time, improving equipment utilization and overall economic efficiency, and prolonging maintenance cycle
Active Publication Date: 2014-02-26
BEIJING SIFANG JIBAO AUTOMATION +1
View PDF3 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] For intelligent substations or digital substations using electronic or photoelectric transformers, in order to solve the problem that the voltage phase cannot be obtained through the voltage extraction device, and the problem that the traditional partial discharge monitoring device cannot be connected to the SV signal, the present invention proposes a method based on the very Method and monitoring device for realizing switch partial discharge monitoring by gauge transformer
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0033] Such as figure 1 Shown is the overall structure diagram of the introduction of unconventional transformers to monitor the partial discharge of the switch. The partial discharge monitoring device requires the unified time synchronization of the whole station to ensure the time synchronization between the merging unit MU and the partial discharge monitoring device. By decoding the SV message, searching for the specified switch voltage acquisition channel, performing Fourier filter processing on the switch voltage channel, calculating voltage RMS, harmonics, system frequency and other parameters, and calculating the switch voltage zero-crossing time according to the system synchronous clock, Form a phase synchronous sampling pulse sequence, collect the PD ultra-high frequency sensor installed on the switch body in real time accor...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for realizing partial discharging monitoring of a switch based on an unconventional mutual inductor and a monitoring apparatus. The monitoring apparatus is connected to an SV sampling message of a combination unit MU so as to carry out SV sampling message decoding; and a voltage zero-crossing-point time of the switch is detected and channel time delay is calculated precisely by using an external synchronous clock, so that the sinusoidal waveform of the switch voltage is restored accurately. The monitoring apparatus collects information of an ultra high frequency partial discharging sensor installed at the switch body in real time according to a sampling pulse formed at the voltage zero-crossing-point time of the switch; analyzing processing is carried out on the sampling data to determine types of partial discharging; and a partial discharging trend is warned early so as to reflect an insulated state of the switch in real time. According to the invention, a problem that some on-line monitoring devices can not introduce a switch voltage signal to obtain synchronous phase information of partial discharging in an intelligent transformer station or a digital transformer station when the switch voltage is a digital signal can be effectively solved, so that the hidden defect of the switch insulation can be found timely. Therefore, the provided apparatus and the method have the broad market application prospects.
Description
technical field [0001] The invention belongs to the field of power system state monitoring, and in particular relates to a switch partial discharge state monitoring device. Background technique [0002] Due to the high field strength inside the switch, partial discharge occurs during operation when there are some defects inside the device. Partial discharge is one of the main causes of switchgear insulation degradation, and it is also an important feature to describe the aging of switchgear insulation. Through the detection and analysis of the partial discharge signal, it can be judged whether there is some insulation hidden danger inside the switch. At present, the application of partial discharge detection technology in switchgear has become more and more extensive. [0003] In conventional substations, switch partial discharge state monitoring devices use voltage extraction devices to introduce AC signals from transformers to obtain phase information for partial dischar...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01R31/327G01R21/12H04L29/06H02J13/00
CPCY04S40/124Y02E60/7838Y02E60/00
Inventor 唐喜任雁铭彭世宽徐万方黄昕李征陈建英肖文兰左廷涛
Owner BEIJING SIFANG JIBAO AUTOMATION