介绍了现场总线技术的优点及其在国内外电厂的应用,并以华电莱州电厂(2×1050 MW)机组水网控制系统为例,阐述了现场总线的实际应用,探讨了应用过程中需考虑的问题. 随着现场总线技术的不断成熟,支持现场总线技术协议的产品越来越多,现场总线技术的应用也越来越广泛.与传统的DCS相比,现场总线技术具有如下特点.

According the characteristic of the Fieldbus technology, it particularly introduce the design and application of the Fieldbus in water treatment control system of Laizhou power plant.

The theory of plasma non-oil ignition technology and the differences between the control logic and the traditional oil ignition technology are introduced. The good effect and benefit after the implementation of the new technology is analyzed.

The controlled object for the thermal power is a rather complicated multivariable nonlinear control system,which is characteristic of nonlinear,delay and great inertial.A nonlinear model of the coordinated control system for 330 MW unit plant was constructed,and it was linearized under rated work conditions.The multivariable coordinated control system of increase in multi-variable decouping controller for original coordinated control system is designed to the corresponding systems,and control result contrast of field investigation shows its validity and practicability.

本文提出了一种对发电厂设备的高温参数进行测量的新方法,即现场利用热电偶+温度变送器进行测量,利用普通导线对信号进行传输;并以国电聊城超临界600MW机组为工程实例对比说明温度变送器+普通电缆与直接采用补偿导线的优缺点,得出温度变送器+普通电缆电厂应用中的必然性。

The grounding system of DCS is necessary to assure the safe and reliable operation of DCS,it is also the important means to avoid the hurt of bodies and the damage of instruments. This paper mainly describes the Grounding system design for DCS of the power plant and puts forward the matter should be paid attentions to.

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