基于DSP的电能质量监测系统的设计

针对传统的单片机无法满足电能质量实时监测与分析的要求,介绍了一种基于DSP技术的电能质量监测系统设计,给出了前置滤波电路、A/D与 DSP的最小系统、同步锁相等电路图及系统的软件流程.调试结果表明,该系统具有较好的准确性和实用性,能适应目前电能质量监测市场发展的需求.     

基于DSP28335的电能质量监测系统设计

利用DSP控制器运算能力强、精度高、硬件资源丰富等特点,设计了以TMS320F28335为核心的双DSP结构电能质量监测系统,并给出了采样电路、CAN通信等电路图及系统软件流程,介绍了上位机软件设计方案和电能质量分析方法。试验结果表明,采用双DSP结构系统及C语言和汇编语言混合编程的方法,提高了监测系统的实时性和可靠性。     

电能质量在线监测平台的设计与开发

近年来,电能质量已逐渐成为一个引人关注的问题,所以对电能质量进行全面、实时地监测具有重要的意义.文章对电能质量在线监测系统的设计和开发做了详细的介绍.为了屏蔽数据源的异构性,采用了国际通用的PQDIF作为数据存储和传输的格式,设计了按月分区、缓冲入库等数据库优化策略,从而很好地实现了海量数据的接入和处理,还利用Ext、...     

嵌入式电力能耗检测系统的开发与调试

为解决建筑电力能耗的监测问题本文介绍了一种基于ARM9的电力能耗检测设备的分析与设计,该设备可检测多项电能指标,能够对电能消耗情况进行实时检测,实现了电能能耗数据的实时采集、实时传输;同时具有功耗小、成本低、实用性强、实时性高等特点。文章对该系统的基本结构、硬件设计、软件设计及系统调试的过程进行了介绍。     

电能质量的改善及监测

介绍了电能质量的有关标准、国内外对电能质量的研究状况、改善电能质量的有关措施，及所设计的基于DSP的电能质量监测仪。     

基于全球导航卫星系统的堤防变形监测系统及应用

为实时监控堤防变形,实现数据采集、数据传输、数据处理、分析预警和综合管理等功能,介绍了全球导航卫星系统(GNSS)定位原理及系统构成,以广东省郁南大堤堤防工程为例,设计了GNSS变形监测系统,并分析探讨了各功能的实现方式。     

适用于风电场的电能质量监测系统

本文介绍了一款适用于风电场的电能质量监测系统。文章对系统功能和电能质量监测算法进行了详细的说明,并结合实际应用,得出该电能质量监测系统的实用性,为后续研究风电场的电能质量问题提供数据依据。     

电能质量监测装置自动化检测平台的设计与实现

针对目前电能质量监测装置的检测多为电网工作人员手工操作、检测效率低等问题,设计与实现了可同时兼容模拟式电能质量监测装置与数字式电能质量监测装置的自动化检测平台,并能自动生成检测报告。同时,在平台中嵌套常用电能质量波形库参数,便于用户实时勾选检测项。该检测平台已在山西、蒙东等地电力科学研究院中正常运行使用,提高了电能质量监测装置的检测效率和检测准确度,验证了自动化检测平台的可靠性和实用性。     

从智能电表获取电能质量数据的分析与应用

在智能电网中,电能质量监测管理系统是一个完善的、可扩充的、标准的信息平台。如果仅靠专用的电能质量采集设备获取日常数据,而忽视非电能质量设备中的电能质量数据共享,就会成为电能质量监测网的"信息孤岛"。介绍了一种从智能电表系统获取电能质量数据的系统构建方案,用以准确、连续地监测电网的电能质量。电能质量监测管理系统投运后,通过获取多方面的电能质量数据,不断地进行充实和完善,提高了数据资源的利用率,较好地解决了基础信息更新、扩展、数据转换和安全等问题。     

基于IEC61850/61970标准的现代电能质量监测系统构架设计

为适应电能质量监测系统网络化、信息化、标准化和智能化的发展趋势,针对电能质量监测终端数据格式、通信方式不统一和系统运行效率低下等问题,在分析电能质量监测系统现状和主要组网方式的基础上,提出采用混合式三层结构进行组网,系统设计采用C/S+B/S结构体系,监测平台基于数据库实现模块化设计,基于IEC61850标准实现监测设备的建模和开发,采用符合IEC61970标准的组件技术实现子系统的集成。实际省级电能质量监测系统运行结果表明,该系统可满足实际电能质量监测需要,符合实际监测网建设规律,能有效保证监测系统的兼容性、开放性和可扩展性要求。     

A power quality monitoring system: a case study in DSP-basedsolutions for electric power industry

The purpose of this study is to develop and implement a power quality monitoring system that will enable power quality engineers to conduct diagnostic testing in the field. The study is limited to the implementation of hardware and software required to process the analog signals received. A real-time monitoring system that can be used to perform automated power quality testing is described. The system is centered on a digital signal processor (DSP) interfaced to a personal computer (PC). The test signal is input to the system through the A/D board. The signal is analyzed in real-time in the DSP, and the results are transferred to the PC through the communication interface. The PC presents the results and interacts with the user. This system can be used to perform onsite power quality studies     

ZigBee和GPRS技术在光伏电站监测系统中的应用研究

通过对ZigBee和GPRS技术的特点和优势的分析,提出了一种光伏电站无线监测应用方案。详细设计了该系统的网络体系结构、光伏电站监测系统中的数据采集、传输过程及因特网服务建设,实现了监控中心通过无线网络远程对光伏电站设备数据的实时采集和运行状态监控,用户可以使用PC或智能终端,通过以太网掌握光伏电站发电情况和发电设备运行情况,达到物联网的效果。     

A methodology for detection and classification of power quality disturbances using a real‐time operating system in the context of home energy management systems

Demand‐side management comprises a portfolio of actions on the consumers' side to ensure reliable power indices from the electrical system. The home energy management system (HEMS) is used to manage the consumption and production of energy in smart homes. However, the technology of HEMS architecture can be used for the detection and classification of power quality disturbances. This paper presents low‐voltage metering hardware that uses an ARM Cortex M4 and real‐time operating system to detect and classify power quality disturbances. In the context of HEMS, the proposed metering infrastructure can be used as a smart meter, which provides the service of power quality monitoring. For this type of application, there is a need to ensure that the development of this device has an acceptable cost, which is one of the reasons for the choice of an ARM microprocessor. However, managing a wide range of operations (data acquisition, data preprocessing, disturbance detection and classification, energy consumption, and data exchange) is a complex task and, consequently, requires the optimization of the embedded software. To overcome this difficulty, the use of a real‐time operating system provided by Texas Instruments (called TI‐RTOS) is proposed with the objective of managing operations at the hardware level. Thus, a methodology with low computational cost has been defined and embedded. The proposed approach uses a preprocessing stage to extract some features that are used as inputs to detect and classify disturbances. In this way, it was possible to evaluate and demonstrate the performance of the embedded algorithm when applied to synthetic and real power quality signals. Consequently, it is noted that the results are significant in the analysis of power quality in a smart grid scenario, as the smart meter offers low cost and high accuracy in both detecting (an accuracy rate above 90%) and classifying (an average accuracy rate above 94%) disturbances.     

PMU-WAMS research and application in Brazil

Wide area measurement system (WAMS), which is based on synchronization data from phasor measurement units (PMU) and EMS SCADA, is implemented to establish a system model that can handle certain functions such as realtime power system monitoring, oscillation mode analysis, accident analysis and decision-making assistance for emergency control. The Brazilian Interconnected Power System (BIPS) is a large system covering an extensive geographical region, which faces certain risks and challenges. It has several main transmission corridors associated with large power plants and interconnection between the northern and southeastern regions. Mismatch between the energy base and load pool also exists in Brazil as energy resources are not well-distributed; therefore, the use of large-capacity, long-distance transmission technique to transmit remote power is unescapable. On the other hand, there are many types of voltage levels and multiple entangled electromagnetic loops owing to historical reasons. Then, for insufficient power reservation and defective grid body in load pools, once the external power is cut, it’s easy to raise a blackout. The infrastructure is old and the power system operates close to the upper limit. All these represent risks and challenges to BIPS. Through WAMS technology research method in this project, the electrical power system function of monitoring, analysis, and control improved from the static state to the dynamic state. WAMS enhances data integration and real-time analysis capabilities, and can provide dispatchers with high quality real-time dynamic information and decision-making support information, enhance monitoring of auxiliary services in the electricity market, enable operators to improve the accuracy of power network analysis, thereby increasing power grid monitoring and operation, and improve the transmission capacity and reliability of the power grid operation [1].     

野外水利视频监控与分析系统设计

针对目前野外条件下水利监控的实际情况,提出了一种在野外工作环境下的水利视频监控系统,其前端设备采用太阳能供电,采集的图像视频通过3G通信方式传输至监控中心,监控中心获得前端图像视频信息后存储、转发、回放并分析处理图像视频信息,获得相关水文水资源与水利工程运行实时数据。实际运行结果表明,该系统能较好地解决当前水利行业野外条件下前端监控设备无供电和数据传输问题,且通过智能分析处理获得了水文水资源、水利工程运行状态等关键信息,为防汛抗旱、水资源管理等水利业务管理与科学决策提供了技术支撑。     

基于无线传感网络的电网谐波监测系统设计

针对目前电网谐波监测存在的缺陷,提出了以无线传感网络技术为基础的电网谐波在线监测新方法。系统采用高性能DSP芯片TMS320F2812实现信号的采集与处理,利用ARM芯片S3C2440完成数据管理、人机交互和系统控制,由无线传感网络ZigBee芯片CC2530实现DSP与ARM间的无线数据传输。系统的无线通信方式、高速数据处理及实时控制功能．使其具有很好的实用和推广价值。     

Electricity tariff design for transition economies: Application to the Libyan power system

This paper presents a general electricity tariff design methodology, especially applicable for transition economies. These countries are trying to modernize their power systems from a centralized environment (with normally, a public vertically integrated electric company) to a liberalized framework (unbundling electricity companies and, eventually, starting a privatization process). Two issues arise as crucial to achieving a successful transition: i) ensuring cost recovery for all future unbundled activities (generation, transmission, distribution and retailing), and ii) sending the right price signals to electricity customers, avoiding cross-subsidies between customer categories. The design of electricity tariffs plays a pivotal role in achieving both objectives. This paper proposes a new tariff design methodology that, complying with these two aforementioned criteria, requires a low amount of information regarding system data and customer load profiles. This is important since, typically, volume and quality of data are poor in those countries. The presented methodology is applied to computing tariffs for the Libyan power system in 2006, using real data.     

安徽电网实时动态监测系统平台及功能设计与应用

电网实时动态监测系统对电力系统安全稳定运行及监测起着重要作用。介绍了安徽电网实时动态监测系统主站的配置和平台方案,论述了以PI数据库＋Oracle数据库为电网实时动态监测系统主站平台,以PI数据库存储电网动态数据、Oracle数据库存储电网模型和结构的优越性,分析了电网扰动与电网正常运行操作表现出的不同物理特性,找出了合理的判据,实现了电网扰动情况下的实时正确报警：阐述了状态估计和低频振荡实现的方法;系统投运以来。运行高效可靠,表明了设计的合理性和有效性。