Protection measurement and control device and protection measurement and control method for power distribution network automation switch
A distribution network automation, protection, measurement and control technology, applied in the field of distribution network, can solve problems such as the inability to intuitively determine the specific location of the feeder fault point, the failure to remove the feeder fault point, and the rapid repair of unfavorable distribution network faults.
Pending Publication Date: 2019-06-28
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
However, in practical applications, the automatic switch itself will have failures such as switch refusal and communication failure, resulting in failure to remove or isolate the fault point of the feeder, making it impossible for operation and maintenance personnel to intuitively determine the specific location of the fault point of the feeder, resulting in complicated testing and maintenance work, and it is not conducive to the rapid repair of distribution network faults
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[0043] The core of the present invention is to provide a protection measurement and control device and a protection measurement and control method for distribution network automation switches, which are used to make it more convenient for operation and maintenance personnel to determine the specific location of the feeder fault point, and reduce the working pressure of operation and maintenance personnel. Speed up the repair of distribution network failures.
[0044]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. ...
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The invention discloses a protection measurement and control device and a protection measurement and control method for an automatic switch of a power distribution network. The device comprises a circuit parameter acquisition circuit, a switching value input circuit, a communication interface, a control loop, a relay output circuit, a signal acquisition circuit connected with the circuit parameteracquisition circuit, a device power supply, and a controller respectively in circuit connection with each part. The system further comprises a summing circuit and a first display device connected with the summing circuit. The first end of the summing circuit is connected with a first relay which is connected with a protection current acquisition module in the circuit parameter acquisition circuitand is used for acquiring quick-break current. The second end of the summing circuit is connected with a second relay which is connected with the protection current acquisition module and is used foracquiring over-current current. The first display device is used for summing the quick-break current and the over-current current to obtain a current sum value. The current sum value is displayed through the first display device, so that the on-site operation and maintenance personnel can determine the specific position of a feeder line fault point.
Description
technical field [0001] The invention relates to the technical field of distribution networks, in particular to a protection measurement and control device and a protection measurement and control method for distribution network automatic switches. Background technique [0002] With the continuous development of distribution network automation technology and the improvement of users' requirements for power supply reliability, the construction and operation of distribution network automation is particularly important, laying the foundation for fault isolation and rapid restoration of power supply in non-faulty areas. [0003] Among them, feeder automation is an important part of distribution network automation. To realize feeder automation, a reasonable distribution network structure is required, and the conditions for ring network power supply are required; the operating mechanism of each ring network switch, load switch, and switch in the street distribution station must hav...
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IPC IPC(8): H02H7/26H02J13/00H02B15/00G01R31/08
CPCY04S10/20Y04S40/126Y02E60/00
Inventor 林裕新罗滨蔡建逸蔡安铭郭清林陈宏海钟悦林达瀚黄炫许鸿斌朱俊樾张颖陈楠牛旭昊马思欣林宗裕林圣铤黄希颖杨旭涛
Owner GUANGDONG POWER GRID CO LTD