TELEMECANIQUE 4HP-200控制模块培训教程

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型号：4HP-200
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TELEMECANIQUE 4HP-200控制模块培训教程

在该项目中监视器主要包含三方面：上位通讯数据交换、实现功率闭环功能、系统保护；控制器主要实现以下三个功能：转速启动、反力矩方式控制、防反转功能。
2.1 功率开环/闭环控制
开环控制：上位机给定系统发电量，监视器采用接口板所采集的变频器输入功率作为反馈信号进行闭环调节。
闭环控制：上位机给定变电所进线功率目标值，然后通过通信将变电所进线功率的实时采样值传输给监视器，监视器将其作为反馈值进行闭环PI调节。
因此开环控制与闭环控制所采用的控制模式是一样的，但是采用的输入值与反馈值存在区别。
监视器功率闭环控制框图如下所示：
功率闭环控制框图
功率闭环控制框图
图2 功率闭环控制框图
2.2系统保护功能包括：
（1）厂用电速降功率：
当变电所进线功率小于厂用电速降功率时，则系统进入斜坡停车状态，变频器减小发电功率，防止超发。
（2）厂用电速停功率
当变电所进线功率小于厂用电立停功率后，变频器立即停车，停止发电。
通常设置时，厂用电速降功率>厂用电立停功率。
（3）汽轮机低转数
当变频器所测转速小于汽轮机低转数设置值后，系统自动进入斜坡停车状态，变频器减小发电量。designed according to the requirements of the controlled object. The action of these relays is carried out according to a certain logical relationship. The output part refers to various output devices selected according to the needs of users Such as solenoid valve coil, various contactors connecting the motor, signal lamp, etc. When will

PLC

: when it is regarded as a controller composed of many "soft relays", its corresponding internal equivalent electrical circuit can be drawn. The internal equivalent circuit of PLC is connected with user input equipment and output equipment respectively. The input equipment is equivalent to the signal receiving link in the relay control circuit, such as operation button, control switch, etc; The output device is equivalent to the executive link in the relay control circuit, such as solenoid valve, contactor, etc. Equivalent relays provided for users in PLC include input relay, output relay, auxiliary relay, time relay, counting relay, etc. The input relay is connected with the input terminal of PLC to receive the signal sent by external input equipment. It cannot be