Process interlocking system and method of motors

Abstract

The invention discloses a process interlocking system of a motor. The process interlocking system comprises motor protection measurement and control devices arranged corresponding to all circuit breakers in a relay chamber, and further comprises field information acquisition control devices arranged corresponding to all the motors, wherein each motor protection measurement and control device and each field information acquisition control device realize information interaction by adopting an IEC61850 (International Electrotechnical Commission) standard GOOSE network. The invention further discloses a motor process interlocking method based on the motor process interlocking system, each motor protection measurement and control device and each field information acquisition control device realize the information interaction by adopting the IEC61850 standard GOOSE network, and thus a logic control and process interlocking function of the motors is completed. According to the system and the method, the information interaction among the plurality of motors can be realized, a method of realizing the interlocking through connection of an original DCS (Distributed Control System) or PLC (Programmable Logic Controller) with field equipment through a plurality of cables is replaced, the use cost is lowered, the field wiring is simplified, and the signal reliability is enhanced.

Description

technical field [0001] The invention relates to a GOOSE-based motor process interlocking system and method, and is especially suitable for the process interlocking and protection of motors in power plants and industrial enterprises. Background technique [0002] In power plants and industrial enterprises, electric motors are indispensable components to ensure the normal operation of the process. For important electric motors, redundant configurations (one for one backup or two for one backup) are generally adopted. [0003] 1. Interlock start of the motor [0004] If the running motor itself fails or its circuit fails, the motor relay protection device can find the fault and trip the circuit breaker of the motor to protect the equipment. After that, DCS (Distributed Control System, distributed control system) or PLC (Programmable logic controller, programmable logic controller) After receiving the trip position of the circuit breaker, it sends a closing command to the circu...

AI Technical Summary

Problems solved by technology

The motor protection measurement and control device is generally installed in the circuit breaker cabinet, and the cable distance for the device to obtain the circuit breaker position signal, current and voltage signal is generally less than 3 meters; the DCS or PLC system is far away from the relay room where the circuit breaker cabinet is placed and the on-site motor. According to different site conditions, the general distance ranges from tens of meters to hundreds of meters, such as figure 1 As shown, therefore, the DCS or PLC obtains the circuit breaker position, current, status information of the on-site motor and consumes more cables for opening and closing operations of the circuit breaker

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