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Direct current power supply insulation detection device and detection method

A DC power supply and detection device technology, applied in the field of measurement and testing, can solve the problems of high cost and large error, and achieve the effects of low cost, large measurement range and high measurement accuracy

Active Publication Date: 2014-12-03
深圳市奥特迅科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a low-cost, high-precision DC power supply insulation detection device and detection method for the above-mentioned defects of high cost and large error in the prior art

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  • Direct current power supply insulation detection device and detection method
  • Direct current power supply insulation detection device and detection method

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Embodiment Construction

[0056] exist figure 2 As shown in the logic diagram of Embodiment 1 of the DC power supply insulation detection device of the present invention, the DC power supply insulation detection device can be used to detect the ground-to-ground insulation resistance of the DC bus, including the single-pole-to-ground insulation resistance value, the double-pole simultaneous ground insulation resistance value. The DC power detection device includes a pair of balance bridge resistors (not shown), a pair of detection bridge resistors (not shown), a voltage detection module 10 , a current detection module 20 and a calculation module 30 . Wherein, a pair of balance bridge resistors are respectively fixedly connected between the DC positive and negative busbars and the ground. A pair of detection bridge resistors are respectively connected between the DC positive and negative busbars and the ground through corresponding switches. The voltage detection module 10 is used to detect the voltag...

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Abstract

The invention discloses a direct current power supply insulation detection device and detection method. The detection device includes a voltage detection module, a pair of balance bridge resistors, and a pair of detection bridge resistors, and also includes a current detection module used for detecting the sum of currents of the pair of balance bridge resistors during single-pole grounding insulation resistance value detection and detecting the sum of the currents of the pair of detection bridge resistors and current of each of the pair of detection bridge resistors during dual-pole grounding insulation resistance value detection; and a calculation module used for acquiring leakage current and calculating the single-pole grounding insulation resistance value according to grounding voltages of direct-current positive and negative buses and the acquired leakage current during single-pole grounding insulation resistance value detection, and acquiring leakage current and calculating the dual-pole grounding insulation resistance value according to the grounding voltages of the direct-current positive and negative buses and the acquired leakage current during dual-pole grounding insulation resistance value detection. By implementation of the technical scheme of the direct current power supply insulation detection device, the cost is low and the precision is high.

Description

technical field [0001] The invention relates to the field of measurement and testing, in particular to a DC power supply insulation detection device and detection method. Background technique [0002] In order to ensure the safe operation of the power system, the control and protection circuits of power plants and substations are powered by DC power. DC bus insulation degradation or DC bus grounding are common faults in DC power supply systems. Generally, when the DC bus is unipolarly grounded, it will not affect the normal operation of the system, but the grounding point must be found in time to eliminate the fault. Otherwise, when the two poles are grounded, serious accidents will occur. Therefore, it is necessary to grasp the insulation performance of the DC power system bus in time. The working principle of the current DC power supply insulation detection device popular on the market is: to detect the insulation resistance value of the DC bus to the ground, and to send...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 许昭德
Owner 深圳市奥特迅科技有限公司
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