Method for measuring capacitor noise by multi-frequency power implantation and apparatus thereof
A technology for capacitor noise and measuring devices, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc.
Active Publication Date: 2010-09-01
WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although a test power supply with wide-area harmonic content can be obtained, the relationship between the fundamental wave and each harmonic is uncertain, and it is more difficult to conduct tests under the given fundamental wave and main harmonic conditions.
Therefore, it also cannot reflect the noise level of the capacitor under real operating conditions
[0005] To sum up, there is no test method and device for noise measurement that is basically close to the actual operation of capacitors
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
[0021] Below according to accompanying drawing and embodiment the present invention is described in further detail.
[0022] In the attached picture: 1-microphone, 2-noise tester, T-transformer, U f1 - Fundamental power supply, U f2 - Harmonic power supply, C - Capacitor under test, C 1 、C 2 、C 3 、C 1 1. C 22 ,: Capacitor, IC-current flowing into the capacitor under test, L 1 , L 2 , L 3 , L 4 , L 5 , L 6 , L 11 , L 22 : Inductor.
[0023] see figure 1 , the basic circuit schematic diagram of multi-frequency power injection to measure capacitor noise, which is determined by the fundamental power U f1 and harmonic power U f2 The multi-frequency power supply is composed of a transformer T. The two electrodes of the capacitor C under test are connected in parallel with the two electrodes of the secondary coil winding of the transformer T. The multi-frequency power supply is coupled through the primary coil winding of the transformer T and loaded to the capacitor ...
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
A method and a device adopt a multi-frequency power injection for detecting the noise of a capacitor; the method is characterized in that an independent fundamental-wave power and a plurality of harmonic power are adopted to form a multi-frequency power for making the injected fundamental-wave and each harmonic current and voltage to be in a controllable state; and the fundamental-wave and each harmonic current and voltage can be sent to an experiment transformer independently according to respective current condition of the capacitor and are loaded to a capacitor to be detected after being compounded by the transformer; two microphones transfer the noise signal of the capacitor to be detected to a noise tester for calculation and analysis and for getting noise parameters thereof. The method and the device for detecting the capacitor noise can detect the noise parameters which are mainly close to that gotten under the real operation of the capacitor, and can provide more accurate scientific data for the noise level evaluation and the noise control.
Description
technical field [0001] The invention relates to a method and device for measuring capacitor noise. In particular, a method and device for measuring capacitor noise by using multi-frequency power injection. Background technique [0002] Capacitors have become a major noise source in HVDC converter stations, especially the noise of AC filter capacitor banks is more serious, which has become a difficult point in environmental governance. Since the occurrence of capacitor noise is related to many factors, especially the harmonics injected into the capacitor, it is difficult to measure and evaluate capacitor noise. At present, there is neither a unified standard nor a unified method for how to measure capacitor noise. This leads to various measurement methods for capacitor noise, and even more diverse power injection methods. There are single-frequency power injection and multi-harmonic synthetic wave power injection. , because these power supplies are far from the actual state...
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 Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
Inventor 倪学锋林浩严飞姜胜宝
Owner WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID