Power supply device for taking electricity from high-voltage side in induction manner

A technology of inductive power taking and power supply device, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as burning loads, damage to protection circuits, economic losses, etc., and achieve high economic benefits. , The application prospect is good, the effect of ensuring safety and stability

Active Publication Date: 2012-07-11

STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO +1

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Problems solved by technology

However, this method has problems in practical

The transmission line or high-voltage switchgear may need to be overloaded due to the tight load. Although there is a certain margin for the current when designi...

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Abstract

The invention relates to field of electric, in particular to a power supply device for taking electricity from a high-voltage side in an induction manner. The power supply device can provide a low-voltage power supply for a monitoring device arranged on a high-voltage transmission line or in a high-voltage switch cabinet. The structure of the power supply device comprises an electricity taking module, an electric energy conditioning module and an intellectual protection module, wherein the electricity taking module comprises a primary busbar, an current transformer magnetic core, a secondary coil, a sample resistor and a single-pole double-throw relay; the electric energy conditioning module comprises a rectification circuit, a point bleeder circuit, a grain wave filter capacitor and a voltage-stabilizing circuit; and the intellectual protection module comprises an STM8 singlechip, an RF (radio frequency) module and a super capacitor. The power supply device for taking electricity from high-voltage side in the induction manner has a protection function and an intelligent monitoring function, effectively protects the power supply device and a rear load from being burned, and real time monitor the power supply through the RF module, and ensures safety and stability of providing power supply for an outer load.

Application Domain

Ac-dc conversion without reversalElectromagnetic wave system +2

Technology Topic

Radio frequencyMagnetic core +12

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Examples

Experimental program(1)

Example Embodiment

[0015] Example 1, reference Figure 1-2 , A power supply device for inducing power from the high-voltage side: it includes a power-taking module 1, an electric energy conditioning module 2 and an intelligent protection module 3;

[0016] The power taking module 1 includes a primary bus 11, a current transformer core 12, a secondary coil 13, a sampling resistor 14, and a single-pole double-throw relay 15. The primary bus 11 passes through the current transformer core 12; The secondary coil 13 is wound on the magnetic core 12 of the current transformer, connected in parallel with the sampling resistor 14, and then connected in series with the single-pole double-throw relay 15;

[0017] The electric energy conditioning module 2 includes a rectifier circuit 21, a tip discharge circuit 22, a ripple filter capacitor 23, and a voltage stabilizing circuit 24, which are connected in series in sequence; the tip discharge circuit 22 includes a voltage regulator tube and a voltage regulator tube It is connected in series with the current-limiting resistance of the Zener tube and connected in parallel with the DC output of the rectifier bridge, and another current-limiting resistance is connected in parallel in the middle, and the current-limiting resistance is connected to the gate of the power tube to control the voltage at which the power tube is turned on or off;

[0018] The intelligent protection circuit 3 includes an STM8 single-chip computer 31, an RF radio frequency module 32, and a super capacitor; the RF radio frequency module is connected to the UART pin of the STM8 single chip computer 31; the super capacitor is connected in parallel to the power supply terminal of the STM8 single chip computer 31.

[0019] Such as figure 1 As shown, there is an alternating current with a constant amplitude on the primary bus 11, an alternating magnetic field will be generated around the line, and an alternating magnetic flux will be generated on the current transformer core 12, and this magnetic flux will be in the secondary coil An alternating induced current is induced on 13. The induced current becomes an electromotive force output on the sampling resistor 14. Under the condition that the single-pole double-throw relay 15 (JQC-3F) is closed, the induced electromotive force is rectified by the rectifier circuit 21 into a pulsating DC voltage. After the pulsating DC voltage passes through the tip discharge circuit 22, the peak energy of the pulsating DC is discharged, and then the ripple filtering capacitor 23 can filter larger voltage ripples. Finally, the voltage drops to 5.5V after the voltage stabilizing circuit 24, and is supplied to the monitoring terminal.

[0020] During the entire circuit operation, the single-chip control module 31 can monitor the working temperature of the tip discharge circuit 22, and preset the temperature exceeding threshold, the recovery threshold and the exceeding duration. After the operating temperature exceeds the standard, the STM8 microcontroller 31 disconnects the power supply circuit through the single-pole double-throw relay 15 until the operating temperature of the tip bleeder circuit 22 reaches the recovery threshold, and the single-pole double-throw relay 15 is reconnected to power supply Circuit. After the power supply is disconnected, the single-chip control module 31 is powered by the internal super capacitor. When the working temperature of the tip bleeder circuit 22 cannot reach the recovery threshold within the preset time period exceeding the standard, the RF radio frequency module 32 is activated to issue a power supply device failure command.

[0021] In order to ensure that the power supply device can be started when the primary bus current is 50A, a 50/60Hz silicon steel sheet is selected as the material of the current transformer core 12, the lamination factor is 10, and the magnetic circuit radius is 9mm. The secondary coil 13 is wound by 0.21mm enameled wire, winding a total of 180 turns. Sampling resistor 14 (80Ω, 10w), connected in parallel with the output end of the secondary coil, is used to set the induced alternating electromotive force at an appropriate voltage point. When the single-pole double-throw relay 15 is closed, the power-taking module 1 sends the induced electric energy to the rear device.

[0022] When the electric energy conditioning module 2 is specifically implemented, such as figure 2 Shown.

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Classification and recommendation of technical efficacy words

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Good application prospect

Power supply device for taking electricity from high-voltage side in induction manner

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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