A Novel Stateful PCE-Cloud Based Control Architecture of Optical Networks for Cloud Services

The next-generation optical network is a service oriented network,which could be delivered by utilizing the generalized multiprotocol label switching(GMPLS) based control plane to realize lots of intelligent features such as rapid provisioning,automated protection and restoration(P&R),efficient resource allocation,and support for different quality of service(QoS) requirements.In this paper,we propose a novel stateful PCE-cloud(SPC)based architecture of GMPLS optical networks for cloud services.The cloud computing technologies(e.g.virtualization and parallel computing) are applied to the construction of SPC for improving the reliability and maximizing resource utilization.The functions of SPC and GMPLS based control plane are expanded according to the features of cloud services for different QoS requirements.The architecture and detailed description of the components of SPC are provided.Different potential cooperation relationships between public stateful PCE cloud(PSPC) and region stateful PCE cloud(RSPC) are investigated.Moreover,we present the policy-enabled and constraint-based routing scheme base on the cooperation of PSPC and RSPC.Simulation results for verifying the performance of routing and control plane reliability are analyzed.

A Novel Optical Control Plane for Switching an Electro-Optical Hybrid Node in Translucent WDM Optical Networks

In a translucent network scenario, development of an optical control plane (OCP) that is aware of the location and number of available regenerators and all-optical wavelength converters (AOWCs) is of paramount importance. However, current generalized multiprotocol label switching (GMPLS) protocol suite does not consider the distribution of regenerator and AOWC availability information to all the network nodes. In this paper, we propose a novel optical control plane (OCP) architecture that 1) disseminates information about network components (i.e. regenerators and AOWCs) to all the network nodes, and 2) evaluates candidate routes which use fewest amounts of network components. Performance of the proposed OCP is compared with a recently proposed hybrid OCP approach in terms of blocking performance, number of deployed components and lightpath establishment setup times. The obtained simulation results show that the proposed OCP approach demonstrates low connection blocking and establishes lightpaths by 1) minimizing the overall network cost owing to the deployment of minimum total number of network components, and 2) demonstrating acceptable lightpath establishment setup times at all traffic loads. Further, the proposed OCP methodology is compatible and suitable for controlling the operations of a novel electro-optical hybrid translucent node which is a latency efficient technology capable of delivering a cost effective implementation suitable for large scale deployment.

Simulation of Optical Packet-Switched Metropolitan Area Network

This paper introduces architectures of two types optical packet switched metropolitan area networks and their media access control protocols. We have designed related network simulation systems. With these simulation systems, the characteristics and performance of the two MANs can be achieved.

Traffic Scheduling in WDM Passive Optical Network with Delay Guarantee

WDM passive optical network becomes more favorable as the required bandwidth increases, but currently few media access control algorithms adapted to WDM acc ess network. This paper presented a new scheduling algorithm for bandwidth shari ng in WDM passive optical networks, which provides per-flow delay guarantee and supports variable-length packets scheduling. Through theoretical analysis and simulation, the end-to-end delay bound and throughput fairness of the algori thm was demonstrated.

An Arrangement of Channels and Transceivers in Optical Packet Switching Networks

Based on a media access and control（MAC）protocol,an arrangement of channels and transceivers in optical packet switching dense wavelength division multiplexing（DWDM）networks is proposed in this paper.In order to reduce the cost of nodes,fixed transmitters and receivers are used instead of tunable transmitters and receivers.Two fixed transmitters and many fixed receivers are used in each node in the scheme.The average waiting delay of this scheme is analyzed through mathematics and computer simulation.The result shows that the property of the scheme is almost the same as using tunable transmitter and receiver.Furthermore,if the tuning time of tunable transmitters is taken into account,the performance of the tunable transmitter scheme is poor than this scheme at the average waiting delay and throughput of the network.

Design and Simulation of Routing-switching Protocol Based on Optical Switch Array

An optical routing-switching technology based on optical switch array is proposed.The characteristics of the blocking and nonblocking networks are analyzed and compared,odd-even sorting network is used to realize optical routing-switching,relative routing-switching protocol is designed.Simulation test under load shows that it can reduce a blocking effectively and enhance an efficiency of switching.Further,it can transfer the processing and switching within parallel computer from electric domain to optical domain. It can make parallel computer coordinating computing and processing at much more higher speed, storing and transmitting even more efficiently.

基于CNN的OCR技术在核电厂DCS系统测试中的应用和实现

核电厂分布式控制系统(DCS)的输入/输出模块在运行期间,随着电子器件性能下降以及时漂的影响,需要定期进行进度复测和校准。针对传统的DCS输入/输出通道测试覆盖率不足,测试效率低及人因问题,本文提出一种基于卷积神经网络(CNN)的光学字符识别(OCR)技术应用在DCS系统的在线测试方法。通过模拟设备和视频采集设备完成画面的自动切换,并读取画面信息,截取特定画面后对其图像预处理,再使用OCR识别模型识别画面内容,将得到的识别结果与期望值进行比较判断,从而实现自动化测试。测试结果表明,通过CNN训练后,显控设备画面字符识别率能达到100%,该方法可以突破设备厂家的专有通信协议的壁垒,可有效降低操作员的人因失误,提升测试效率和核电厂的经济性。

Enhanced solutions for resource conflict in GMPLS controlled optical network

This article discusses the issue of resource conflict in the generalized multi-protocol label switching （GMPLS） controlled optical network. Based on the analysis of the current random rebuilding mechanism and its drawbacks, this article presents two enhanced solutions for improvement, namely, the priority-based resource allocation mechanism and the network management system （NMS） based sequential resource allocation mechanism. Experimental results show that the presented mechanisms perform better than the original random rebuilding solution in terms of the connection setup/recovery time and successful rate.

基于DRSN的MG-Y激光器快速准连续波长调谐方法

针对调制光栅Y分支(Modulated Grating Y-branch,MG-Y)可调谐半导体激光器难以在调谐范围内进行快速、准确的准连续波长调谐问题,提出了一种基于深度残差收缩网络的MG-Y激光器控制参数表快速生成方法。该方法使用光电二极管采集光功率,相较光谱仪采集波长的方法,其采集速率可大幅提高;采用深度残差收缩神经网络模型对MG-Y激光器电流调谐区域进行快速分类;结合激光器的电流调谐特性,采用拉格朗日插值方法,生成高精度控制参数表,实现MG-Y激光器快速、准确的准连续波长调谐。实验结果表明,用深度残差收缩模型对电流调谐区域分类的时间小于20 s,生成的控制参数表控制激光器输出波长精度为1 pm,稳定性为0.28 pm,法布里-珀罗标准具解调波长稳定性为1.8 pm,对光纤布拉格光栅应变传感器的应变解调精度为1με,稳定性为0.6με。该方法大幅提升了生成控制参数表的速度,满足光纤传感解调应用需求。

OMRON Control Link总线和PLC在隧道群监控系统中的实现

以云南元(江)磨(黑)高速公路段隧道群监控系统的实践为例,介绍了OMRON Control Link总线和PLC在高速公路隧道群监控系统中的一种实现方案。

基于FPGA+STM32的多功能压电陶瓷控制系统

针对微位移压电陶瓷控制系统数据传输方式单一、通道少、可靠性低等缺点,设计一种FPGA+STM32的多功能压电陶瓷控制系统。该系统以光纤为主通信方案,网络+FSMC总线为备通信方案;并以Artix7系列FPGA芯片为主控芯片,负责接收4路光纤与FSMC总线传输的数据和命令,并行控制19片16通道的DAC81416数/模转换,实现304通道的模拟电压输出,而STM32负责网络与FSMC总线的数据传输控制;同时,采用桥式电路+差分放大电路+模/数转换器的电路设计与温湿度传感器相结合的方式采集环境数据,并通过RS 422接口实现25 Hz频率回传。此外,预留RS 485接口,可控制外部环境测量装置,完成更多环境数据的采集。目前,该系统已成功应用于某光学系统的压电陶瓷位移控制中。测试结果表明,整个系统工作稳定,两种通信方式均可实现高速数据传输,通过配置可实现304通道-5~5 V的模拟电压实时输出,环境数据能按照25 Hz频率实时刷新显示。

智慧供热系统低碳运行的设计与研究

先进的控制系统是保证区域供暖系统精准管控和节能运行的关键。因此针对能源管控中心和各换热站及其二次侧输配管网建立智慧供热系统,实现区域供暖系统的智慧和低碳运行。该系统首先在软件层基于人工智能技术对各换热站及其二次侧输配管网的主要调节设备进行基于负荷预测的分布式优化提前联动控制策略设计研究;然后在硬件层对现场设备的监控和分布式控制架构进行设计;最后在网络层基于无源光网络技术完成数据传输方案的设计,将软件层控制策略与硬件层监控设备进行有机结合。通过在实际工程中对该智慧供热系统的运行进行调试,能够满足运维人员对系统运行的智慧化需求和末端用户的热舒适需求,实现区域供暖系统的节能低碳运行。

PLC自控系统在北河口水厂二期工程中的应用

结合北河口水厂二期工程实例,介绍了PLC自动控制系统在自来水厂中的应用情况,对自来水厂的建设有着重要参考价值。

针对光储并网的中低压配电网分层优化控制策略

为解决大规模分布式能源并网导致配电网运行产生波动,以及传统配电网中低压层的控制策略相互独立,仅依靠配电网功率信息实现单层控制,其电压控制效果已经逐渐不能满足负荷侧需求的问题,通过分别建立配电网中压层集中式控制模型,低压层分布式控制模型,提出中压层集中式-低压层分布式的分层协调控制的方法,研究如何提升含大比例光伏及储能系统接入的配电网的稳定性,优化控制策略。结果表明:通过二阶锥优化算法与CPLEX求解器运算,得出调控指令并传递至相应节点,通过能量流、信息流、控制流的多流联合作用实现优化控制,实现减少线路损耗,提升配电网稳定性的优化目标。可见中压层集中式-低压层分布式的分层协调控制策略的有效性。

光纤组网全冗余PLC控制通信直接序列扩频编码

直接序列扩频通信需要大量线性复杂序列用作调制编码,为了达到理想编码效果,提出了光纤组网全冗余PLC控制通信直接序列扩频编码方法。采用双环网控制器,支持PLC控制机架冗余配置,根据扩频线性反馈逻辑输出值与双环网控制器之间关系,输出扩频序列。设计槽位机架冗余模式和旋转编码拨码开关,将二进制信息转化为扩频后调制符号向量所需扩频矩阵,采用香农-哈特利方法实现编码操作。由实验结果可知,该方法编码结果与理想结果一致,最高z方向振幅为0.8,可有效提高编码效率。

低压配电网中分布式光储系统的电压协调控制策略

为解决低压配电网中分布式光储系统的电压越限问题,本文开展电压协调控制策略研究。首先,建立分布式光储系统并网模型。在此基础上,提出基于光伏逆变器剩余容量的电压控制策略、储能参与调压的控制策略和光伏逆变器与储能协调的电压控制策略。最后,结合三种控制策略,对其应用效果进行分析。分析得出,新的控制策略在实际应用中具备有效性,可以解决电压越限问题,提高低压配电网运行稳定性。

适应新型电力系统的地区光传输网建设策略

新型电力系统中可再生能源的比重将越来越高,新能源和储能等站点会采用新的接线方式接入;新型电力系统中“源网荷储”互动会逐渐加深,这均对地区光传输网提出更高要求。从新能源T接接入场景、精准负荷控制系统场景入手,结合2种场景中新型信息业务特点,对现有通信传输的影响进行分析,提出地区光传输网的适应性策略。

基于交换光网络技术的电力通信传输网络控制方法

文章设计了基于交换光网络的电力通信传输网络架构,包括核心层、汇聚层以及接入层,详细阐述了各层次的功能和技术要求,重点分析了自动维护网络拓扑、智能选择动态路由、网络保护恢复机制等关键控制方法,使用链路状态协议、智能路由算法以及网络保护恢复机制,实现网络的实时监控、动态调整以及故障恢复。设计的方法提升了网络的整体性能,满足了现代电力系统对高带宽、低延迟以及高可靠性通信的需求,为电力通信传输网络的设计和优化提供了系统化的方法与实践经验,具有较高的理论价值和应用前景。

基于5G通信技术的智慧城市光纤网络控制系统设计

随着智慧城市建设的快速推进,传统光纤网络控制系统已难以满足其高要求。文章基于5G通信技术设计了智慧城市光纤网络控制系统,包括网络监控、安全防护以及智能调度3个核心模块。该系统充分利用5G通信技术的超高速率、超低时延以及大连接特性,实现了网络全生命周期的实时感知、多层次安全防护以及智能化资源调度。实验结果表明,与传统4G系统相比,本系统在异常检测、安全防御以及资源调度等方面均表现出显著优势,为智慧城市提供了高质量、高可靠的网络服务保障。

白鹤滩水电站10000 kN坝顶双向门机控制系统设计开发

针对白鹤滩水电站门机的主起升机构起重量大、门机大车行走电机数量多、电机布局与常规门机差异大等问题,开展10000 kN双向门机控制系统设计开发,研究主起升机构电机的主从控制及同步性技术、一台变频器控制多台电机的技术、各分布式站点的光纤通信技术等,解决了多电机刚性连接、柔性连接的同步和出力均衡,一台变频器控制多台电机,电机电缆以及通信控制等问题,为今后大起重量启闭机的控制设计提供发展方向和思路。