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10kV capacitor current-limiting electricity taking device and protection method

A power-taking device and capacitive current-limiting technology, which is applied in the power supply field, can solve problems such as the protection of 10kV capacitor current-limiting power-taking devices, and achieve the effects of voltage stability, reliable operation, and high power-taking efficiency

Active Publication Date: 2021-04-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a 10kV capacitor current-limiting power-taking device and a protection method to solve the protection problem of the 10kV capacitor current-limiting power-taking device for the above-mentioned deficiencies in the prior art

Method used

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  • 10kV capacitor current-limiting electricity taking device and protection method

Examples

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Embodiment 1

[0078] 10kV on-column switch capacitor current-limiting power-taking device, installed between 10kV line and ground, used for power supply of 10kV on-column switch and its FTU.

[0079] The high-voltage power-taking capacitor is a high-voltage capacitor of 1700pF;

[0080] The grounding capacitance is a high-voltage capacitor of 20pF;

[0081] The primary and secondary rated voltage of the transformer is AC 2200V / 27V, and the excitation inductance is 6000H;

[0082] The first protection module is a TVS array, which consists of 10 bidirectional TVS with a breakover voltage of 400V in series;

[0083] The second protection module is an AC voltage limiting circuit composed of a bidirectional thyristor, a bidirectional trigger diode, a trigger capacitor and a trigger resistor, and the operating voltage is 32V;

[0084] The voltage stabilizing module includes a comparator, a bleeder resistor, and a MOSFET. The bleeder resistor is 120Ω, and the bleeder power is 5W.

Embodiment 2

[0086] The 10kV transmission line monitoring system power take-off device is installed between the 10kV transmission line and the ground.

[0087] The high-voltage power-taking capacitor is a high-voltage capacitor of 5000pF;

[0088] The grounding capacitance is a high-voltage capacitor of 50pF;

[0089] The primary and secondary rated voltage of the transformer is AC 2200V / 240V, and the excitation inductance is 3000H.

[0090] The first protection module is a TSS array, which consists of 12 TSSs with a breakover voltage of 350V in series;

[0091] The second protection module is a TSS device with a breakover voltage of 275V;

[0092] The voltage stabilizing module includes a comparator, a discharge resistor, and an IGBT. The discharge resistor is 30Ω, and the discharge power is 25W.

Embodiment 3

[0094] 10kV on-column switch capacitor current-limiting power-taking device, installed between 10kV line and ground, used for power supply of 10kV on-column switch and its FTU.

[0095] The high-voltage power-taking capacitor is a high-voltage capacitor of 2000pF;

[0096] The grounding capacitance is a high-voltage capacitor of 30pF;

[0097] The primary and secondary rated voltage of the transformer is AC 2000V / 27V, and the excitation inductance is 4000H.

[0098] The first protection module is a gas discharge tube with a DC breakdown voltage of 4kV;

[0099] The second protection module is a TSS device with a breakover voltage of 32V;

[0100] The voltage stabilizing module includes a comparator, a bleeder resistor, and a triode. The bleeder resistor is 90Ω, and the bleeder power is 10W.

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Abstract

The invention discloses a 10kV capacitor current-limiting electricity-taking device and a protection method. According to the invention, a voltage stabilization module guarantees the voltage stabilityof the electricity taking device when the phase voltage of a power system is in a range of + / -10% of a rated value and a load is not greater than the rated load of the electricity taking device; whenthe power frequency overvoltage in the power system acts on the electricity taking device, a second protection module acts, so that the power frequency overcurrent flows through a high-voltage electricity taking capacitor, a transformer and the second protection module, the first protection module does not act, and the voltage stabilization module works normally; when lightning and operation impulse overvoltage in the power system act on the electricity taking device, the first protection module acts, surge current flows through the high-voltage electricity taking capacitor and the first protection module, the instantaneous voltage peak value of the electricity taking device is limited, the second protection module does not act, and the voltage stabilizing module works normally; and according to the protection method, all the protection modules can be matched with one another, and safe and reliable operation of the capacitor current-limiting electricity taking device under various working conditions of a 10kV power system and various load changes is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a 10kV capacitor current-limiting power-taking device and a protection method. Background technique [0002] Power supply is a key technology that needs to be solved urgently for the widespread popularization of sensors and intelligent terminal devices of the industrial Internet of Things, especially the power Internet of Things. For example, for the sensor monitoring installed on the transmission line, the intelligence and automation of the switch on the pole, etc., various types of power industry sensor Internet of Things, sensors, intelligent units and communication modules are installed on the power line towers and various types of power equipment Nearby, conventional 220V AC power supply will not be easily accessible. Even if other unconventional power sources can be used, the power supply reliability is not high and the maintenance cost is high. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H9/04
CPCH02H9/02H02H9/04
Inventor 杨兰均史宇昊刘帅
Owner XI AN JIAOTONG UNIV