Aerial insulation line partial discharge detection and positioning device and method
A technology for partial discharge detection and overhead insulation, applied in the direction of testing dielectric strength, etc., to achieve good flexibility, simple device structure, and easy to carry
Active Publication Date: 2015-11-04
XI AN JIAOTONG UNIV +1
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a device and method for detecting and locating partial discharge of overhead insulated wires. Deficiencies and difficulties existing in the technical aspects of the measurement system in practice
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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0048] Such as figure 1 As shown, the present invention provides a partial discharge detection and positioning device for overhead insulated wires, which mainly includes the following units:
[0049] The transmitter host 11 is used to generate the timing pulse signal of the transmitter;
[0050] The reflector host 12 is used to generate the timing pulse signal of the transmitter;
[0051] The pulse injection sensor 13 at the transmitting end and the pulse injection sensor 15 at the reflection end are used to inject high voltage pulses into the overhead insulated wire through the law of electromagnetic induction;
[0052] The pulse detection sensor 14 at the transmitting end and the pulse injection sensor 16 at the reflecting end are used to capture the pulse sig...
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The invention relates to an aerial insulation line partial discharge detection and positioning device and method. The device mainly comprises the following units: a transmitting end host used for generating transmitting end time synchronization pulses and recording all pulse waveforms in a sampling period; a reflection end host used for being triggered to generate a reflection end time synchronization pulse after receiving the pulses generated at a transmitting end and recording all pulse waveforms in the sampling period; a transmitting end pulse injection sensor and a reflection end pulse injection sensor which are used for injecting pulses to an aerial insulation line through the law of electromagnetic induction; and a transmitting end pulse detection sensor and a reflection end pulse detection sensor which are used for detecting pulse signals in the aerial insulation line. The transmitting end host comprises a high-voltage pulse generation unit, a filtering unit and a data acquisition unit. The reflection end host comprises a high-voltage pulse generation unit, a filtering unit, a data acquisition unit and a trigger delay unit. The device is small in size and light in weight, does not need to cut off a power supply line during measuring, is high in measurement accuracy, and can improve stability, reliability and safety of the aerial insulation line in a power distribution network greatly.
Description
【Technical field】 [0001] The invention relates to the field of state monitoring of power distribution lines, in particular to a device and method for detecting and locating partial discharge of overhead insulated wires. 【Background technique】 [0002] In recent years, along with the large-scale urban power grid insulation transformation, the use of overhead insulated wires in the distribution network is increasing. The use of overhead insulated wires for power distribution has higher stability, reliability and safety than traditional power distribution through overhead bare wires, and can save urban power distribution space and operation and maintenance costs. [0003] However, the insulation layer of overhead insulated wires may introduce some tiny defects, such as bubbles or impurities, due to manufacturing process problems during the manufacturing process. During the operation of the line, these bubbles or impurities will share a greater voltage and cause partial discharg...
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IPC IPC(8): G01R31/12
Inventor 李洪杰何维晟孙浩杰孙振权任正某马季岳青孙毅卫刘斌
Owner XI AN JIAOTONG UNIV