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PROFIBUS现场总线技术在宁海电厂的应用 总被引:1,自引:0,他引:1
PROFIBUS现场总线技术在工业过程控制中已有广泛应用,但在国内大型电厂工程中的应甩还处于尝试阶段.介绍PROFIBUS现场总线的技术特点和在电厂中的应用情况,根据其特点,在浙江国华宁海电厂一期工程4台国产亚临界600MW机组的设计中,对设备分布广泛的闭冷水系统,采用了基于PROFIBUS总线通信控制的AUMA智能执行机构,并以PROFIBUS总线通信实现了分散控制系统(DCS)与汽轮机数字电液控制系统(DEH)的一体化.总结采用现场总线的经验表明:在工程造价、系统安全性等方面具有积极的意义.并给全面数字化生产和维修管理奠定了基础,为后继工程建设积累了设计和工程经验。 相似文献
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蒋月红 《可编程控制器与工厂自动化(PLC FA)》2006,(12):80-83
文章通过对Profibus DP总线技术及其应用的综合论述,分析了现场总线电动执行机构的应用优势和需要注意的问题。针对基于Profibus DP总线协议的AUMA一体化电动执行机构,具体阐述了其在浙江国华宁海电站一期工程的硬件构架、上位机组态和操作的实现,从而真正体现基于现场总线技术的电动执行机构的安全性、经济性。 相似文献
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Profibus现场总线以其卓越的技术性能,在全世界范围内得到广泛的应用。在电动执行机构行业内也需要开发带有Profibus现场总线接口的产品。着重介绍了带有Profibus现场总线接口的智能型电动执行机构的开发、试验和应用,实践证明,使用效果较好,对其推广具有重要意义。 相似文献
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Hayashi Kozaburo Nakamura Takao Seki Junji 《IEEE engineering in medicine and biology magazine》1986,5(1):30-36
Fundamental and applied studies, recently and currently being done in Japan, in regard of the department of ventricular assist devices are briefly summarized from the engineering standpoint. Present status of the development of blood pumps and their materials, design of control drive systems for pneumatic drive and permanently implantable, electromechanical actuators, and fundamental studies of the effects of ventricular assist on the hemodynamics and cardiac mechanics are described. Clinical cases of the application of ventricular assist devices are also documented. 相似文献
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Maureen L. Mulvihill Ryan J. Shawgo Roger B. Bagwell Mark A. Ealey 《Journal of Electroceramics》2002,8(2):121-128
Xinetics is working with NASA to develop a cryogenic deformable mirror technology to meet the specific needs of the Next Generation Space Telescope. One of the critical technical issues is the development of a cryogenic actuator with sufficient displacement and temperature stability. This paper discusses the two year effort to achieve a cofired electroceramic multilayered cryogenic actuator. The development began by testing materials from 300 to 35 K via a cut and bond actuator technology that led to a cryogenic electroceramic material down selection. After selecting a doped SrTiO3, a cofired actuator process specific to the cryogenic ceramic was developed. The assembled cryogenic actuators achieved the 3 m displacement (stroke) between 35 and 65 K required by the deformable mirror design. The discrete cryogenic actuators were assembled into an engineering model cryogenic 349-channel deformable mirror that was delivered to NASA in October 2001. 相似文献
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This paper presents design of an self contained actuators unit in wide area damping control of power system in
stabilizing system response for both nominal system condition and during actuator faults. First it is presented that use
of multiple actuators in wide area control aid in improving damping in power system. A wide area damping controller
feeding multiple actuators to satisfy multiple objectives in wide area damping control of power system is designed.
Minimization of infinity norm of closed loop transfer function of power system with wide area controller in feedback
path & closed loop poles placement techniques are used in controller synthesis. Second a reconfigurable control on
the lines of fault hiding principle is added to the controller design to maintain system damping to pre-fault level in
case of actuator faults. A reconfiguration component(RC) is activated on occurrence of actuator fault thereby
reconfiguring system dynamics and redistributing wide area control signal among remaining active actuators. RC
together with remaining active actuators and under same wide area damping controller maintains system damping to
pre-fault level thereby preserving system dynamic response. In the reconfigurable control design presented here no
new actuators outside the unit of actuators designed for wide area damping control is required. This makes for an self
contained actuators unit in wide area damping control of power system both for nominal system condition and for
system affected by actuator faults. A two area power system model is considered here for demonstrating effectiveness
of designed robust damping controller with multiple outputs feeding multiple actuators in wide area control and
illustrating the idea of self contained actuators unit for maintaining system damping in case of actuator faults. 相似文献
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为了适应自动控制技术水平的不断发展,电动执行器在精确性、灵敏度、快速反应和稳定性等方面也有了较大提高,但是目前应用的国产电动执行器在定位器和位置发送器的灵敏度、准确性以及智能化等方面与进口电动执行器还存在差距。通过国华宁海电厂在现场总线控制系统中采用进口电动执行器的应用实例,介绍了当代先进的电动执行器的技术特点。 相似文献