As the demand for wind energy continues to grow at exponential rate, reducing operation and maintenance (O & M) costs and improving reliability have become top priorities in wind turbine maintenance strategies. Pr...As the demand for wind energy continues to grow at exponential rate, reducing operation and maintenance (O & M) costs and improving reliability have become top priorities in wind turbine maintenance strategies. Prediction of wind turbine failures before they reach a catastrophic stage is critical to reduce the O & M cost due to unnecessary scheduled maintenance. A SCADA-data based condition monitoring system, which takes advantage of data already collected at the wind turbine controller, is a cost-effective way to monitor wind turbines for early warning of failures. This article proposes a methodology of fault prediction and automatically generating warning and alarm for wind turbine main bearings based on stored SCADA data using Artificial Neural Network (ANN). The ANN model of turbine main bearing normal behavior is established and then the deviation between estimated and actual values of the parameter is calculated. Furthermore, a method has been developed to generate early warning and alarm and avoid false warnings and alarms based on the deviation. In this way, wind farm operators are able to have enough time to plan maintenance, and thus, unanticipated downtime can be avoided and O & M costs can be reduced.展开更多
This paper presents the design of hierarchical communication network for traction power supply supervisory control and data acquisition (SCADA) system. Some key points, such as data transmission synchronization, datab...This paper presents the design of hierarchical communication network for traction power supply supervisory control and data acquisition (SCADA) system. Some key points, such as data transmission synchronization, database distribution, data transformation, and the network communication optimization at the supervisory level of the communication network are discussed. At the control level, based on the specificity of communication lines for electrified railway, a structure of two layer ring telecommunication network and the efficient bi directional polling scheme in software design are utilized. Then, an analysis for the scheme under normal and disturbance conditions is given. By means of the scheme, software switching over at a fault point of a channel is realized automatically.展开更多
为了提高抛丸设备的自动化控制与数据管理水平,本文基于数据采集与监视控制系统(Supervisory Control and Data Acquisition,SCADA)、数据库技术、网络与信息技术对抛丸设备进行智能化自动控制与数据监测。首先,合理的机械结构设计与电...为了提高抛丸设备的自动化控制与数据管理水平,本文基于数据采集与监视控制系统(Supervisory Control and Data Acquisition,SCADA)、数据库技术、网络与信息技术对抛丸设备进行智能化自动控制与数据监测。首先,合理的机械结构设计与电气控制设计是重要的前提。其次,基于SCADA对抛丸设备进行人机交互控制、实时数据监控、历史数据采集与存储、数据分析与可视化为系统主要功能。最后,系统平台可以利用服务器进行本地化部署与网络化访问。本文详细介绍了系统平台的架构、功能、实施过程与相关技术,来实现对抛丸设备的控制与管理。展开更多
介绍了天津开发区燃气管网SCADA系统的设计目标、系统设计及实现。系统采用无线通讯,实现了对分散远程站的实时测控。上位机监控系统集中管理系统数据,应用Intellution公司的i FIX软件和i Web Server软件,使系统授权用户可以通过互联网...介绍了天津开发区燃气管网SCADA系统的设计目标、系统设计及实现。系统采用无线通讯,实现了对分散远程站的实时测控。上位机监控系统集中管理系统数据,应用Intellution公司的i FIX软件和i Web Server软件,使系统授权用户可以通过互联网来管理系统,改善了系统管理体制。展开更多
为在大型网络分布式SCADA(Super Control and Data Acquisition)应用系统中解决诸如电力、通信、石油、化工、制造业等行业或领域,在过程、流程、状态方面的数据监视、数据控制、数据采集与数据管理的高效、实时问题,解决各级子系统之...为在大型网络分布式SCADA(Super Control and Data Acquisition)应用系统中解决诸如电力、通信、石油、化工、制造业等行业或领域,在过程、流程、状态方面的数据监视、数据控制、数据采集与数据管理的高效、实时问题,解决各级子系统之间人工逐级汇接的问题,提高应用系统的稳定性、可维护性,这里提出了一种层次化网络SCADA通讯模型。该模型是通过在层次化网络SCADA模型中,引入基于TCP/IP协议的客户机/服务器查询方式数据通讯技术和点对点主动数据传递技术而建立的。根据该模型所设计的产品,经过生产实践证明,应用该模型可以较方便地构造分布在不同区域计算机上的SCADA系统,进行高效的实时通信。该模型为具有多层结构的大型分布式网络化集中SCADA系统的设计、开发,探索出了一条十分有效的新路径。展开更多
文摘As the demand for wind energy continues to grow at exponential rate, reducing operation and maintenance (O & M) costs and improving reliability have become top priorities in wind turbine maintenance strategies. Prediction of wind turbine failures before they reach a catastrophic stage is critical to reduce the O & M cost due to unnecessary scheduled maintenance. A SCADA-data based condition monitoring system, which takes advantage of data already collected at the wind turbine controller, is a cost-effective way to monitor wind turbines for early warning of failures. This article proposes a methodology of fault prediction and automatically generating warning and alarm for wind turbine main bearings based on stored SCADA data using Artificial Neural Network (ANN). The ANN model of turbine main bearing normal behavior is established and then the deviation between estimated and actual values of the parameter is calculated. Furthermore, a method has been developed to generate early warning and alarm and avoid false warnings and alarms based on the deviation. In this way, wind farm operators are able to have enough time to plan maintenance, and thus, unanticipated downtime can be avoided and O & M costs can be reduced.
文摘This paper presents the design of hierarchical communication network for traction power supply supervisory control and data acquisition (SCADA) system. Some key points, such as data transmission synchronization, database distribution, data transformation, and the network communication optimization at the supervisory level of the communication network are discussed. At the control level, based on the specificity of communication lines for electrified railway, a structure of two layer ring telecommunication network and the efficient bi directional polling scheme in software design are utilized. Then, an analysis for the scheme under normal and disturbance conditions is given. By means of the scheme, software switching over at a fault point of a channel is realized automatically.
文摘为了提高抛丸设备的自动化控制与数据管理水平,本文基于数据采集与监视控制系统(Supervisory Control and Data Acquisition,SCADA)、数据库技术、网络与信息技术对抛丸设备进行智能化自动控制与数据监测。首先,合理的机械结构设计与电气控制设计是重要的前提。其次,基于SCADA对抛丸设备进行人机交互控制、实时数据监控、历史数据采集与存储、数据分析与可视化为系统主要功能。最后,系统平台可以利用服务器进行本地化部署与网络化访问。本文详细介绍了系统平台的架构、功能、实施过程与相关技术,来实现对抛丸设备的控制与管理。
文摘为在大型网络分布式SCADA(Super Control and Data Acquisition)应用系统中解决诸如电力、通信、石油、化工、制造业等行业或领域,在过程、流程、状态方面的数据监视、数据控制、数据采集与数据管理的高效、实时问题,解决各级子系统之间人工逐级汇接的问题,提高应用系统的稳定性、可维护性,这里提出了一种层次化网络SCADA通讯模型。该模型是通过在层次化网络SCADA模型中,引入基于TCP/IP协议的客户机/服务器查询方式数据通讯技术和点对点主动数据传递技术而建立的。根据该模型所设计的产品,经过生产实践证明,应用该模型可以较方便地构造分布在不同区域计算机上的SCADA系统,进行高效的实时通信。该模型为具有多层结构的大型分布式网络化集中SCADA系统的设计、开发,探索出了一条十分有效的新路径。
