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A line-to-line multifunctional fault current limiting system

A fault current limiting and multi-functional technology, applied in the electric power field, can solve problems such as insufficient current limiting effect, and achieve the effects of improving power supply reliability, improving device utilization and operating economy, and suppressing fault overcurrent.

Active Publication Date: 2020-06-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a line-to-line multifunctional fault current limiting system to solve the insufficient current limiting effect in the prior art

Method used

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  • A line-to-line multifunctional fault current limiting system
  • A line-to-line multifunctional fault current limiting system
  • A line-to-line multifunctional fault current limiting system

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Embodiment Construction

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0015] figure 1 It is a schematic structural diagram of a line-to-line multifunctional fault current limiting system according to an embodiment of the present invention, as shown in figure 1 As shown, the system includes:

[0016] The first filtering module, the first dynamic voltage compensation module and the current limiting module, the curre...

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Abstract

An embodiment of the invention provides an inter-line multifunctional fault current limiting system. The system is characterized in that a first switch tube and a first supercapacitor are connected between one end and the other end of a first dynamic voltage compensation module in series; one end of the first dynamic voltage compensation module is connected to one end of a first switch; the otherend of the first switch is connected to one end of a current-limiting inductor; the other end of the current-limiting inductor is connected to the other end of the first dynamic voltage compensation module; one end of an energy-discharging resistor is connected to the other end of the first switch while the other end of the energy-discharging resistor is connected to a collector electrode of a current-limiting IGBT; and an emitter of the current-limiting IGBT is connected to the other end of the first dynamic voltage compensation module; and if a power grid to be controlled normally operates,the current-limiting IGBT is disconnected, and other devices are closed. According to the embodiment of the invention, the short-circuit current obtained when a single feeder has short circuit or thetwo feeders have short-circuit faults simultaneously can be effectively inhibited, the voltage compensation depth is increased, the current of a ground fault line is controlled to be within a certainrange, and the fault overcurrent is restrained.

Description

technical field [0001] Embodiments of the present invention relate to the field of electric power technology, and in particular to a line-to-line multifunctional fault current limiting system. Background technique [0002] With the development of the national economy, the rapid growth of the load of my country's power system has led to the continuous increase of the short-circuit power and short-circuit current of the power grid, which is very harmful to the safe and stable operation of the power system; nonlinear devices and impacts widely used in industry Loads are likely to cause grid current and voltage waveform distortion, and the sensitive load on the user side of the distribution network is gradually increasing, and people's requirements for power quality are becoming more stringent. Therefore, limiting short-circuit current, improving the safety and reliability of power system operation, and providing high-quality electric energy to loads have become one of the key ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06H02J3/12
CPCH02J3/06H02J3/12
Inventor 姜飞涂春鸣李印宜郭祺吴震宇
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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