Passive filtering device and method with lightning-protection isolation and fireproof early warning functions

A passive filtering and functional technology, applied in harmonic reduction devices, parts of emergency protection devices, circuit devices, etc., to eliminate interference and ensure accurate detection.

Active Publication Date: 2017-09-05
北京英瑞来科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no such method of judging the fault

Method used

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  • Passive filtering device and method with lightning-protection isolation and fireproof early warning functions
  • Passive filtering device and method with lightning-protection isolation and fireproof early warning functions
  • Passive filtering device and method with lightning-protection isolation and fireproof early warning functions

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Embodiment Construction

[0055] The specific embodiments provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0056] like figure 1 As shown in the figure, a passive filter device with lightning protection isolation and fire early warning functions is a device with ground potential counterattack isolation, fire early warning, and passive filtering functions, including voltage sensors, current sensors, sampling circuits, signal Processing circuit, main control MCU, arc fault alarm circuit, switch isolation output circuit, thyristor drive circuit, thyristor switch, capacitor, inductor and ground potential counterattack isolation module.

[0057] like figure 2 As shown in the figure, the main control MCU connects the voltage sensor and the current sensor through the signal processing circuit and the sampling circuit, and the main control MCU analyzes the same voltage and current sampling signals through arc fault analysis and harmonic current...

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Abstract

The invention provides a passive filtering device and method with lightning-protection isolation and fireproof early warning functions. The device has functions including ground potential back flashover isolation, fireproof early warning and passive filtering. Current detection of a fault arc is shared with current detection of passive filtering, the same detection signal is used, a common master control unit is used to analyze fault arcs and calculate content of harmonic waves at the same time, so that the device can sample the fault arc before characteristic current of the fault arc is detected and ensure accurate detection of the fault arc. The fault arc detection method uses a determination result of a current difference parameter as a premise, the change rate of the content of the harmonic waves is used to determine the fault arc, interference of nonlinear loads can be eliminated effectively, four determination means are used for determination, and the fault arc can be detected accurately under the condition of complex equipment.

Description

technical field [0001] The invention relates to the technical field of power quality detection and management, in particular to a passive filter device and method with lightning protection isolation and fire early warning functions. Background technique [0002] Arc is a gas discharge phenomenon, which is the instantaneous spark produced by the passage of electric current through some insulating medium. With the improvement of my country's economic level, the domestic electricity consumption has increased rapidly, and the power distribution system has become more and more complex. Due to the limited space of the distribution line, many wires in the distribution box are bundled together. When the power is overloaded, the cable insulation will be damaged, which will lead to a fault arc and cause an electrical fire. In addition, when the contact between the lines is poor or the influence of environmental factors occurs, when the electricity is turned on and off, a fault arc wi...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/00H02H9/02H02H9/00H02H1/00
CPCH02H1/0015H02H9/005H02H9/02H02J3/00H02J3/01Y02E40/40
Inventor 袁敞袁洋波李旷
Owner 北京英瑞来科技有限公司
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