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Fault indicator acquisition unit current high-efficiency energy-taking circuit

A technology of acquisition unit and bridge rectifier circuit, which is applied in the direction of circuit devices, emergency protection circuit devices, and protection against overcurrent, which can solve problems such as damage, constant current, and secondary side voltage rise, and achieve high efficiency. Energy harvesting, easy installation, and maintenance-free effects

Inactive Publication Date: 2019-01-22
SHANDONG ZHIYANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are certain deficiencies in CT power taking. For example, when the current in the wire is large, the voltage on the secondary side will increase (the power will increase, but the current will not change), which may cause the entire power taking circuit to exceed the components. operating range, resulting in irreversible damage to

Method used

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  • Fault indicator acquisition unit current high-efficiency energy-taking circuit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The present invention provides a current high-efficiency energy-taking circuit of a fault indicator acquisition unit, including a CT power-taking device, a bridge rectifier circuit, an energy discharge protection circuit, a voltage stabilizing circuit module, etc.; the CT power-taking device is connected to a bridge-type Rectifier circuit; the bridge rectifier circuit includes a diode and a capacitor, and the bridge rectifier circuit is connected to a CT power-taking device and an energy discharge protection circuit;

[0021] The energy discharge protection circuit includes a voltage comparator for the control tube, a control MOS tube, a power MOS tube, a resistor and a capacitor, and the two ends of the energy discharge protection circuit are respectively connected to the bridge rectifier circuit and the voltage stabilizing circuit module;

[0022] The voltage stabilizing circuit module is composed of a voltage stabilizing circuit chip and input and output capacitors, a...

Embodiment 2

[0024] like figure 1 As shown, the current high-efficiency energy-taking circuit of the fault indicator acquisition unit of the present invention is used to provide a reliable power supply for the fault indicator, including a CT power-taking device, a bridge rectifier circuit, an energy discharge protection circuit, and a voltage stabilizing circuit module Wait;

[0025] The CT power-taking device is connected to a bridge rectifier circuit for equipment energy-taking;

[0026] The bridge rectifier circuit is composed of low-loss and high-efficiency diodes D1, D2, D3, and D4, which are connected to the CT power-taking device and the energy discharge protection circuit (dotted line box in the figure), and are used to convert the CT signal into DC The signal is supplied to the subsequent stage circuit;

[0027] The energy discharge protection circuit is composed of a voltage comparator U2 for the control tube, control MOS tubes Q14 and Q11, a power MOS tube Q4 and related resis...

Embodiment 3

[0030] This embodiment further illustrates the working process of the energy-taking circuit on the basis of the second embodiment.

[0031] 1) The CT power acquisition device obtains energy from the primary side line and converts it into a power signal output;

[0032] 2) After being filtered by C26, C27 and C28 capacitors, output the power signal to the bridge rectifier circuit;

[0033] 3) The full-bridge rectifier circuit rectifies the power signal and outputs a DC pulsating voltage signal; the DC pulsating signal becomes a stable DC voltage signal after passing through C24 and C25;

[0034] 4) Input the DC voltage signal through the above steps into the LDO labeled U5 in the figure, and output the standard 3V;

[0035] 5) The DC voltage signal enters the voltage comparator and is compared with the reference value of the voltage comparator. The calculated value is V=3*R98 / (R97+R98). If the value is greater than 400mV, the voltage comparator outputs a high voltage Level; i...

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Abstract

The invention discloses a current high-efficiency energy-taking circuit of a fault indicator acquisition unit, which relates to the technical field of distribution network automation, and comprises aCT power-taking device, a bridge rectifying circuit, an energy discharge protection circuit, a voltage stabilizing circuit module and the like. The CT power fetching device is connected to a bridge rectifier circuit; The bridge rectifier circuit comprises a diode and a capacitor, and the bridge rectifier circuit is connected to a CT power picking device and an energy discharge protection circuit.The invention can not only obtain enough energy from the to-line for equipment operation, but also provide a protection loop when the primary side current is too large, thus providing a stable energysupply for the subsequent circuit.

Description

technical field [0001] The invention relates to the technical field of distribution network automation, in particular to a current high-efficiency energy-taking circuit of a fault indicator acquisition unit. Background technique [0002] The fault indicators used for distribution lines are directly hung on the bare overhead wires. Theoretically, the energy harvesting methods that can be used are solar energy, wind energy, temperature difference energy or directly from the wires. [0003] In the actual operation process, the realistic method is to directly use the current transformer (CT) to obtain energy from the wire. The method is simple and reliable, and a relatively mature power extraction scheme has been developed in a large number of applications. [0004] However, there are certain deficiencies in CT power taking. For example, when the current in the wire is large, the voltage on the secondary side will increase (the power will increase, but the current will not chang...

Claims

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Application Information

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IPC IPC(8): H02J5/00H02H3/08
CPCH02J5/005H02H3/087
Inventor 许克刘文杰王亮高传名刘国永
Owner SHANDONG ZHIYANG ELECTRIC