Power supply circuit design method for an auxiliary switch node resistance test system
A technology for resistance testing and power supply circuits, applied in load supply circuits, battery circuit devices, measuring resistance/reactance/impedance, etc., can solve the problems of pillar porcelain insulator breakage, corrosion, and poor flange glue installation, etc., to avoid interference, Strong anti-jamming ability, improve the effect of anti-jamming ability
Pending Publication Date: 2021-06-18
JIANGSU RUGAO HIGH VOLTAGE ELECTRIC APP
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Problems solved by technology
[0002] The open type isolating switch is one of the important equipment in the substation. Its reliability is of great significance to the safe and stable operation of the power grid. However, accidents of pillar porcelain insulator breakage often occur. cause
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[0026] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.
[0027] like figure 1 The schematic diagram shown shows that the test system has a human-computer interaction part 1, a power supply part 2, and a core measurement part 3, wherein the hardware of the test system includes a measurement circuit, a filter, an analog-to-digital conversion chip ADS1255, an SPI interface, a main control chip, USB module, upper computer PC, J-Link debugging module, when measuring, after the resistance to be measured is connected to the measurement circuit, the output voltage of the measurement circuit is amplified, sampled and converted by the analog-to-digital conversion chip ADS1255 after passing through the filter circuit of the filter , get the digital value of the output voltage that can be read and processed, and transmit the data to the main...
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The invention relates to a power supply circuit design method for an auxiliary switch node resistance test system, which comprises the following steps: an analog power supply adopts two paths of analog power supply: the first path of power supply is a special power supply for an AVDD pin of an analog-to-digital conversion chip ADS1255 and comprises a capacitor C16, a capacitor C17, a capacitor C18 and a voltage stabilizing chip VR2, and the second path of power supply is a special power supply for a test loop and comprises a capacitor C25, a capacitor C26, a capacitor C27 and a voltage stabilizing chip VR4. Except for the power supply of the test loop and the AVDD pin of the analog-to-digital conversion chip ADS1255, the power supply of other parts of the test system is provided by a digital power supply, and the digital power supply comprises a digital main switch K1, a USB1, a voltage stabilizing chip VR1, a capacitor C7, a capacitor C8 and a capacitor C9. The method has the advantages that analog signals and digital signals are strictly distinguished, a completely separated power supply is adopted, and interference of high-frequency signals on two electric signals through a common power supply-ground loop is avoided.
Description
technical field [0001] The invention relates to the field of isolating switch testing, in particular to a method for designing a power supply circuit for an auxiliary switch node resistance testing system. Background technique [0002] The open type isolating switch is one of the important equipment in the substation. Its reliability is of great significance to the safe and stable operation of the power grid. However, accidents of pillar porcelain insulator breakage often occur. cause. Damaged parts include broken pillar porcelain insulators or broken metal pipe hoops of conductive arms; therefore, the cause of failure of the disconnector under the action of a strong typhoon should be analyzed, the structural performance of the insulator should be optimized, and corresponding wind and disaster mitigation measures should be taken to ensure Reliable operation under the action is very necessary. [0003] Due to the particularity of the isolating switch, generally after the pr...
Claims
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Login to View More IPC IPC(8): H02J7/00G01R27/02
CPCH02J7/0063G01R27/02
Inventor 王柳刘敏吉雪龙陈洁肖越张永飞
Owner JIANGSU RUGAO HIGH VOLTAGE ELECTRIC APP