Monopole grounding system and device and method for grounding protection and fault monitoring

A technology of fault monitoring and single-pole grounding, which is applied in the direction of photovoltaic system monitoring, measuring devices, measuring electricity, etc., can solve problems such as low safety, and achieve the effect of solving low safety

Active Publication Date: 2014-07-02
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0005] In view of this, the present invention provides a grounding protection and fault monitoring device, a single-pole g

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  • Monopole grounding system and device and method for grounding protection and fault monitoring
  • Monopole grounding system and device and method for grounding protection and fault monitoring
  • Monopole grounding system and device and method for grounding protection and fault monitoring

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] The invention provides a grounding protection and fault monitoring device, which is applied to a single-pole grounding system to solve the problem of low safety in the prior art.

[0043] It should be noted that, for the convenience of description, the unipolar grounding system described in the embodiments of the present application all takes the photovoltaic power generation system as an example, including a photovoltaic array that converts solar energy...

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Abstract

The invention discloses a device for grounding protection and fault monitoring. According to the device for grounding protection and fault monitoring, the voltage to ground of the positive electrode and the voltage to ground of the negative electrode of a monopole grounding system are sampled in real time through a fault monitoring device and are converted into corresponding ground impedance values, when the continuouly cumulative frequency that the ground impedance value of a certain electrode of the monopole grounding system is smaller than a preset impedance value exceeds a preset frequency, it is judged that faulty grounding points exist on the electrode, and an alarm is given. According to the device for grounding protection and fault monitoring, online detection of the two electrodes of the monopole grounding system can be conducted in real time when the system operates, detection can be conducted even when the system is not stopped, and the problem of low safety performance in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of electrical detection, in particular to a single-pole grounding system, a grounding protection and fault monitoring device and method. Background technique [0002] In order to avoid the polarization of the photovoltaic cells in the photovoltaic power generation system, thereby affecting the performance of the photovoltaic cells, the prior art forms a single-pole grounding system by grounding the negative pole (or positive pole) of the photovoltaic cell array to solve the problem of the photovoltaic cell. Polarization of the battery. [0003] In order to ensure system safety, the above-mentioned unipolar grounding system should be a unipolar single-point grounding system, so the unipolar grounding system should be equipped with grounding protection and fault monitoring devices to avoid other point grounding faults. Such as figure 1 As shown, the ground protection and fault monitoring device includes: an ...

Claims

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Application Information

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IPC IPC(8): G01R31/02H02S50/00H02S40/30
CPCY02E10/50
Inventor 张玉陶磊冯纪归汪耀华吴迎丰
Owner SUNGROW POWER SUPPLY CO LTD
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