Centralized bus-bar protection extension access capability method and device
A technology for busbar protection and expansion devices, which is applied in the direction of emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of poor overall reliability and increased equipment investment costs, achieve a wide range of applications, reduce the number of devices and communication links, Scalable Effects
Inactive Publication Date: 2015-12-02
NR ELECTRIC CO LTD +1
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the main wiring scale of the busbar exceeds the access capability of the centralized busbar protection, and the use of distributed busbar protection increases the equipment investment cost and the overall reliability is poor, and provides a flexible and reliable centralized busbar protection with extended access capability method and device
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Embodiment 1
[0028] This centralized busbar protection expansion access capability device is composed of a busbar protection host, an analog expansion device and a switch expansion device; both the busbar protection host and the analog expansion device have optical fiber communication modules; the bus protection host and the analog expansion After the optical fiber communication function module is connected, the data delivery of the busbar protection host and the data uploading of the analog expansion device are realized; both the busbar protection host and the switch expansion device realize input signal acquisition and output signal output through the CAN bus; the busbar protection host CAN bus expansion module and digital expansion device are equipped with CAN bus expansion module; the bus protection host and digital expansion device realize the CAN bus interconnection between the bus protection host and the digital expansion device through the CAN bus expansion module; the analog expansi...
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The invention discloses a centralized bus-bar protection extension access capability method, which comprises the following steps: connecting a bus-bar protection host with an analog quantity extension device, and realizing the extension of an analog quantity channel; connecting the bus-bar protection host with a switching value extension device, and realizing the extension of a switching value signal. The bus-bar protection host and the analog quantity extension device are respectively subjected to an analog quantity sampling, and highly reliable sampling synchronization independent of an external synchronous source is realized by using a synchronous sampling method independent of the external synchronous source; the analog quantity extension device sends synchronized sampling data to the bus-bar protection host, and the bus-bar protection host performs protection logic programming by using the received synchronized sampling data and self-sampling analog quantity data; input and output of the switching value signal are realized through a data bus by the bus-bar protection host and the switching value extension device respectively. The invention also discloses a centralized bus-bar protection extension access capability device. The method and the device are flexible and reliable, and the protection access capability of a centralized bus-bar is improved, meanwhile the number of devices and communication links are greatly reduced, and the overall reliability is high.
Description
technical field [0001] The invention relates to the busbar protection technology in the field of electric power system relay protection, in particular to a method and a device for expanding access capability of centralized busbar protection. Background technique [0002] Microcomputer busbar protection is the most widely used busbar protection at present. At present, there are two main types of microcomputer busbar protection, one is centralized busbar protection, and the other is distributed busbar protection. [0003] Such as figure 1 As shown, the centralized busbar protection implements all the protection functions by one device. The advantage is that the functions are highly centralized, and there is no need to pay attention to the sampling synchronization problem, and the reliability is easy to guarantee. The disadvantage is that the access capability is fixed. When the number increases, the existing centralized busbar protection is difficult to realize the disadvanta...
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IPC IPC(8): H02H7/22H02J13/00
CPCY02E60/00Y04S10/20
Inventor 吕航丁杰王风光李响鲍凯鹏龚啸李力
Owner NR ELECTRIC CO LTD
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