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Actively controlled current-limiting protector for current bidirectional low-voltage DC power distribution system and working method thereof

A low-voltage direct current and power distribution system technology, applied in the direction of emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, electrical components, etc., can solve the problem of high customization cost, single function, and inductance value Large and other problems, to achieve the effect of reasonable topology design, good flexibility, and precise control

Active Publication Date: 2020-03-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the improvement of DC voltage level and transmission power, the traditional inductive DC current limiter can no longer meet the requirements due to factors such as large inductance value, single function, high customization and high cost. And the distribution network has brought new problems

Method used

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  • Actively controlled current-limiting protector for current bidirectional low-voltage DC power distribution system and working method thereof
  • Actively controlled current-limiting protector for current bidirectional low-voltage DC power distribution system and working method thereof
  • Actively controlled current-limiting protector for current bidirectional low-voltage DC power distribution system and working method thereof

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] The present invention adopts the following circuit topology. The main idea is that when a short-circuit fault occurs in the DC distribution network, the four-quadrant operation of voltage and current can be realized through the circuit topology of the present invention. When a short-circuit fault occurs in the multi-terminal DC system, the current is reduced and maintained within a relatively controllable and small value range, which limits the short-circuit current and maintains the normal operation of the unfaulted DC system.

[0036] Such as figure 1 As shown, the current limiter of the present invention is mainly composed of a full bridge composed of four diodes connected to a bidirectional push-pull circuit. As far as the topology of the active current limiting protector itself is concerned, due to the working principle of...

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Abstract

The invention discloses an active control type current limiting protector for bidirectional current low-voltage direct current distribution system and a working method thereof, An active control typecurrent limiting protector for current bi-directional low-voltage direct current distribution system include a protector module, the protector module comprises a push-pull circuit, a voltage stabilizing capacitor C1 arranged on the low-voltage side of the push-pull circuit and a voltage stabilizing capacitor C2 arranged on the high-voltage side of the push-pull circuit, and anode butted diodes D1and D3, and cathode butted diodes D2 and D4, A positive electrode of the voltage regulating capacitor C2 is connected to an anode of the diode D1, A negative electrode of the voltage regulating capacitor C2 is connected to a cathode of the diode D2, a cathode of the diode D1 is connected to an anode of the diode D2 as a first connection terminal A of the protector module, and a cathode of the diode D3 is connected to an anode of the diode D4 as a second connection terminal B of the protector module. The current limiting protector of the invention can be used for four-quadrant operation and isnot influenced by the direction of the power flow.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and specifically relates to an active control type current-limiting protector for a current bidirectional low-voltage DC power distribution system and a working method thereof. Background technique [0002] DC transmission and distribution technology began in the 1920s. Because of the lack of technical reserves at that time, in DC transmission, such as voltage conversion, power flow control and circuit breakers, it was difficult to realize, which largely restricted DC transmission and distribution. web development. Today, with the vigorous development of power electronic semiconductor devices and related control technologies, DC systems have been mentioned again and are increasingly used in new power transmission and distribution systems due to their unique inherent advantages over AC systems. of construction projects. However, with the improvement of DC voltage level and transmission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
CPCH02H9/025
Inventor 卓超然杨旭张笑天张雄马鑫黄燕飞
Owner XI AN JIAOTONG UNIV
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