Satellite synchronous time apparatus for power system
A power system and satellite technology, applied in circuit devices, synchronization, clocks driven by synchronous motors, etc., can solve the problems of master station time error, system time error, development of integrated automation system of substation, etc., to expand the scope of application and coverage Wide range and reliable results
Inactive Publication Date: 2003-11-12
SOUTHEAST UNIV
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Problems solved by technology
[0005] 2. Since the time information in the system depends on the time of the master station, the time error of the master station will lead to the time error of the entire system, which is very unfavorable for improving the reliability of power system automation
[0006] 3. There are some advanced automation systems that use the GPS timing method, but due to the use of general-purpose GPS timing devices, they have not been developed for the characteristics of the substation integrated automation system, such as only providing second pulse and RS232 / RS485 communication channels, As a result, the application of new automation devices in power systems is limited, so they cannot be widely used in the system
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[0026] The hardware block diagram of the synchronous clock of GPS is as follows: figure 1 shown.
[0027] The power system satellite synchronous timing device is composed of a communication part and a control part. The communication part includes GPSOEM receiving board 1, CAN communication channel 5, and RS232 / 485 communication channel 6. The control part includes main control CPU module 2, program storage module 3, time Pulse output module 4; wherein the main control CPU module 2 is respectively connected with GPS OEM receiving board 1, program storage module 3, time pulse output module 4, CAN communication channel 5, and RS232 / 485 communication channel 6, and GPS OEM receiving board 1 The output terminal is connected to the input and output terminals of the time pulse output module 4, the output terminal of the time pulse output module 4 is connected to the pulse channel PIR, the RS232 / 485 communication channel 6 is connected to the RS485 communication channel, and the CAN c...
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The device relates to the GPS satellite synchronous clock appled in an integrated automatic control system of transformer stations in electric systems. Particular, it is the clock to distribute correct time to microprocessor type devices in electric systems. The comunication part includes the GPS OEM receiving board 1, CAN communication channel 5, RS232 / 485 communication channel 6. The control part includes the main control CPU module 2, the program storage module 3 and the time pulse output module 4. The main control CPU module 2 is connected to the said board 1, the module 3, the module 4, CAN communication channel 5 and RS232 / 485 communication channel 6 respectively. The output end of the board 1 is connected to the input end of the module 4, whose output end is connected to the pusing channel PIR. RS232 / 485 communication channel 6 is connected to the RS485 communication channel. The CAN communication channel 5 is connected to the site bus.
Description
1. Technical field [0001] The invention relates to a GPS satellite synchronous clock used in a comprehensive automation system of a substation in an electric power system, in particular to a clock which can accurately serve each microcomputer device in the system. 2. Background technology [0002] In the power automation system, the time information recording of events such as equipment actions mainly depends on the time information modules in each automation device in the system. In order to ensure the accuracy of time information, the entire system must use the same accurate time, which is There needs to be an accurate source of time information within the system. [0003] At present, the usual practice is to use the serial communication interface RS232 / RS485 to send the time information of the master station down one level, so as to achieve the purpose of time synchronization. Such disadvantages are: [0004] 1. Due to the delay of communication, the time information wi...
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IPC IPC(8): G04G7/00G04R20/04G06F1/12G06F13/38H02J13/00
Inventor 郑建勇秦申蓓宋明杜炎森刘浩
Owner SOUTHEAST UNIV