Point to point message synchrony-based sampling and controlling method
A technology of message synchronization and control method, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problems of small amount of information, loss, increase system cost, etc. The effect of maintenance optimization
Inactive Publication Date: 2013-10-23
NARI TECH CO LTD
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[0003] At the current stage, most of the distributed sampling control systems designed by various equipment manufacturers use independent external synchronization control signals to realize the synchronization function, and then realize the synchronization of sampling and control functions (such as PPS synchronization, CNVT / INT signal synchronization), The control system realized in this way is very susceptible to the influence of external electromagnetic field interference, and it is easy to cause the synchronous signal to lose pulses or signals for a short time, so that the reliability of the system cannot be guaranteed; in addition, because only the drive control of the external synchronous signal In this way, the amount of information carried by the signal link is less, which is more and more unfavorable for the signal interaction between the distributed units. If it is necessary to increase the communication between the units, a dedicated communication channel needs to be added, which increases the system cost, In the implementation of the project, communication wiring is also added, which is not conducive to the improvement of the integration of the entire system
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[0033] The present invention will be further described below in conjunction with the accompanying drawings.
[0034] The main controller sends the synchronous message (synchronous sampling frame or synchronous control frame) to each distributed sub-unit according to the set time through the FPGA chip, and each distributed sub-unit uses the FPGA to check the arrival time of the received synchronous message along the Lock and analyze the synchronization message information, and trigger the synchronization signal according to the message delay and synchronization delay. For example, the distributed acquisition unit samples the frame according to the synchronization signal and sends it to the main controller. The main controller analyzes the sampled message and hands it over to the The main calculation processor calculates, and after the completion, the result is sent to each control sub-unit through the FPGA at the set time. The control sub-unit triggers the synchronization signal...
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The invention discloses a point to point message synchrony-based sampling and controlling method. The FPGA (Field Programmable Gate Array) technology is used for realizing functions of punctual sending, receiving locking, delay calculation and timing triggering of synchronous messages, information of a distributed main control unit and subunits is interacted periodically by using point to point message transmission, each subunit uses FPGA to analyze synchronous pulse signal triggering sampling and controlling logic, and thus a point to point method lower message level synchrony-based sampling and controlling function is realized between the main control unit and the subunits in a distributed sampling control system. According to the method, the implementation of the distributed system or equipment can be simplified, the reliability is enhanced, the system construction cost can be lowered, and the system maintainability can be optimized.
Description
technical field [0001] The invention relates to typical applications of distributed sampling and control-based equipment or systems related to electric power and industrial control, in particular to a sampling and control method based on point-to-point message synchronization, which belongs to the technical field of power electronics. Background technique [0002] In the application process of power system control protection and power electronic equipment, due to the different geographical locations where the relevant equipment is installed or the limited resource capacity of a single device design, it is impossible to realize all sampling and control functions in a single device. It is necessary to design equipment or systems based on distributed sampling and control systems to realize all overall functions, such as common wind power conversion control systems, distributed power fault recorder equipment, distributed electronic transformer collectors, etc. application. Thes...
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IPC IPC(8): H04L29/08
CPCH04L12/403H04J3/0658H04L12/4015
Inventor 郑玉平周华良杨志宏石磊王小红胡钰林姜雷谢黎赵马泉
Owner NARI TECH CO LTD