Multi-event sequential recording and testing system

Abstract

The invention discloses a record and test system of multiple-event sequence, which is characterized by the following: adapting on-site CAN bus to do communication connection; recording the sequence of happening time corresponding to the condition deflection when the monitored object occurs SOE case. The system contains a case of GPS, main station computer, at lest two middle controllers, at least two communication servers and at least four SOE substations, wherein the GPS provides time mark; the computer sends clock signal A to all middle controllers, which select one controller as datum clock station to send time setting signal B,C to other middle controllers and all substations; the communication server transmits clock signal A to all SOE substations to affirm and record SOE event; the millisecond clock in the SOE substation is started by signal C to generate millisecond clock signal D and integrate with A to form clock signal E of SOE substation, which judges and uploads SOE event. The invention confines the synchronous and monitoring resolution error not more than 1 millisecond.

Description

technical field [0001] The invention relates to the monitoring of a large-scale distributed control system, and more specifically relates to a multi-event sequence recording and testing system. Background technique [0002] In large and medium-sized distributed control systems, substation automation systems, and hydropower station automation systems, monitoring of a large number of equipment states is often involved. These devices may be switches, circuit breakers, reclosers, etc., and the monitoring system often monitors the opening and closing states of the contacts of these devices. In the monitoring process, not only its state needs to be monitored, but also the time when the state changes. In the same system, the state changes of some devices are related to each other, so it is necessary to detect the occurrence time of such state changes, which we use SOE event records to represent. The English full name of SOE is SEQUENCE OFEVENT, that is, the sequence of events. Th...

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Problems solved by technology

Obviously, this method is also very difficult to ensure that the relative time scale error of all SOE substations does not exceed 1ms

[0010] Third, a GPS system is installed in the system, which has the advantage of high synchronization accuracy, but the export of the system is limited. If all SOE sub-stations are directly synchronized with the GPS system, the system cost will also become very high

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