Low-voltage microcomputer protection device
A microcomputer protection device, low-voltage technology, applied in the direction of emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of analog output signals that cannot meet the requirements of electric power automation, flexible expansion standards, low flexibility, etc., to achieve Enhanced reliability and quickness, good scalability and flexible operation
Inactive Publication Date: 2013-04-03
上海久创电气自动化设备有限公司
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Problems solved by technology
[0004] However, this technology cannot be flexible enough to flexibly expand the standard analog output signal, and cannot provide standard analog interfaces to the power system in the growing power automation process, and the meter uses a fixed dedicated meter. , if the corresponding meter function is added to the power system, the change will be relatively large
Facing the rapid development of the power system automation industry, it has been unable to meet certain power automation requirements
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[0019] The embodiments of the present invention will be described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention. Detailed implementation modes and specific operation procedures are given, but the protection scope of the present invention is not limited to the following implementations. example.
[0020] Such as figure 1 As shown, this embodiment includes: voltage transformer 1, current transformer 2, relay output circuit 3, switch input circuit 4, voltage filter processing circuit 5, current filter processing circuit 6, relay output photoelectric isolation circuit 7, switch value Input photoelectric isolation circuit 8, central processing unit 9, serial port control photoelectric isolation circuit 10, indicator photoelectric isolation circuit 11, analog photoelectric isolation 12, dual serial port control loop 13, indicator circuit 14, analog output circuit 15 (according to The site needs to be increased or decre...
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The invention discloses a low-voltage microcomputer protection device in the technical field of relay protection in a power system. The low-voltage microcomputer protection device comprises a current transformer, a voltage transformer, a relay output circuit, a switch value input circuit, a voltage filtering processing circuit, a current filtering processing circuit, a relay output photoelectric isolation circuit, a switch value input photoelectric isolation circuit, a central processor, a serial port control photoelectric isolation circuit, an indicator light photoelectric isolation circuit,a simulation output photoelectric isolation circuit, a double-serial port control loop and an analog output circuit. The invention integrates the functions of protection, measurement, power measure and 4-20mA analog output into a whole and supports a MODBUS communication protocols.
Description
Technical field [0001] The invention relates to a device in the technical field of power system relay protection, in particular to a low-voltage microcomputer protection device. Background technique [0002] In recent years, with the rapid development of the computer industry, microcomputer technology has penetrated into various research fields of power system relay protection, such as the proposal of new principles of microcomputer protection and the development of microcomputer protection devices. In response to the shortcomings and new requirements of traditional relay protection, various intelligent, mechatronics measurement and control, monitoring and other microcomputer-based relay protection devices continue to emerge at home and abroad. At present, the market is ahead of SIEMENS's 7SJ6X and ABB's RER54X series. They all integrate a variety of functions, and the protection logic and primary system diagram can be configured by the user. For example, the protection functio...
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IPC IPC(8): H02H7/22H02J13/00
CPCY04S10/20Y02E60/725Y02B90/224Y04S20/14Y02B90/20
Inventor 曹淑资李效农张炜王亦林周冠军
Owner 上海久创电气自动化设备有限公司