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。     

基于PIC18F87J60的微网电能质量监测网络系统设计与实现

随着对微网研究的深入及其应用范围的扩大,微网中的电能质量问题越来越成为人们关注的焦点,而对电能质量各项指标进行监测则是改善电能质量的基础和前提.提出一种基于PIC18F87J60单片机的微网电能质量监测网络系统,分析了该系统的功能和优点,并具体阐述了利用该系统构成电能质量监测网络的硬、软件的组成及实现方法.     

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。     

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。     

国网上海电科院发明国内首个移动电能质量监测平台

正国网上海电科院发明的"基于信息物理系统的移动电能质量监测平台"创新性地以信息物理系统为基础,通过建设电能质量检测设备与后台主站的无线数据通道,兼顾部署灵活性、环境适应性、传输实时性的特点,解决了电能质量监测检测工作中的数据采集与后续分析处理的实时性问题。电能质量监测是电力行业确保供电质量、服务民生需求的重要测试工作。此前,在对缺乏有线通信环境的变配电站     

基于DSP与GPRS的电能质量监测系统

获取广泛的电能质量实时监测数据具有重要的意义,但高成本和数据传输的不便限制了电能质量实时监测的范围。为此提出以GPRS作为数据传输通道组成电能质量监测系统,并使用单片DSP作为核心开发出低成本的电能质量实时监测终端,详细介绍了如何充分利用DSP的片内外围设备以简化系统硬件设计,同时介绍了软件的设计和在算法上进行的优化。     

一种基于SOA架构的电能质量监测系统解决方案

研究一种基于面向服务架构(Service-Oriented Archi-tecture,SOA)的电能质量监测系统解决方案。该方案采用JMS(Java Message Service)技术,以服务提供方式将各模块解耦,既可无缝集成电力系统的调度自动化系统、生产管理等系统,也可集成已部署与将部署的电能质量监测系统。将各系统无缝集成后,综合各系统的功能和数据,还可完成电能质量分析与评估的高级应用。该方案的现场应用效果表明,基于SOA的电能质量监测系统不仅可以完成单个变电站的电能质量高级分析,还能扩展到片区、供电局甚至省(网)级的高级分析应用。     

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.     

基于录波数据的广域电能质量评估系统的设计

  [目的]  为填补在特高压电网和新能源并网技术高速发展背景下,对信息化和智能化的更高要求中,传统电能质量在线监测系统凸显出的部署成本高、维护工作量大、覆盖程度低和功能单一等短板。  [方法]  提出了基于故障录波数据挖掘进行电能质量特征参数辨识、提取和计算的方法,设计了利用现有录波器和调度数据网开展非侵入式的广域电网电能质量监测、评估和决策支持的系统架构。  [结果]  试点应用结果表明:系统监测的电能质量指标全面,采集精度优于标准要求,事件识别、诊断准确率高,在厂站覆盖率、监测点容量、文件上送、预警、发布等方面有明显优势。  [结论]  系统设计具备可行性,能以较小投入实现对现有电能质量在线监测系统在广域电网的延伸和补充。     

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、...     

提高虹桥商务区电能质量的方案及措施

随着新型电力电子设备的大量应用,电网中非线性负荷客户的比例不断提高,由此而产生的电能质量问题也越来越突出,并对电网的安全稳定运行产生了新的威胁。而采用电能质量监测管理系统,通过监测、分析、评估,已经成为新形势下保证电网健康、稳定运行的一项重要措施。介绍了虹桥商务区用电客户需要提供优质电能的特殊性及重要性,在监测和综合分析的基础上,对谐波、电压暂降等电能质量问题,提出了治理方案及相应措施,尤其是对区域客户实施电力定制方案后,可以提高供电可靠性和用电质量。     

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     

大型抽水蓄能电站施工期空气环境监测系统设计与应用

针对施工期抽水蓄能电站恶劣的空气环境,提出了一套适用于复杂情况下的空气环境监测系统,首先根据国家相关标准确立了系统采样对象类型和设备要求,其次根据无线通讯原理实现多种传感器的数据远程无线传输与处理,最后基于监测点的可靠性原则进行安装,提出可行的布置方案;通过与监测数据对比,推导得到监测数据与距离的关系,可用于推算靠近爆破点的有毒有害气体浓度。设计并建立了由物理层、中间层、应用层三部分组成的抽水蓄能电站有毒有害气体监测系统。在安徽省某在建抽水蓄能电站的实际应用表明,该系统满足抽水蓄能电站施工现场空气质量监测要求,能够有效提高施工作业安全管理水平。研究成果可为施工现场空气环境治理提供参考,降低作业人员安全风险。     

Research on a power quality monitoring technique for individual wind turbines

The extensive deployment of megawatt-scale wind turbines is bringing more challenges to the safety and stability of electric grid than ever before. This is not only because of the unstable wind over time but the increased risk of power quality pollution by defective wind turbines particularly when the turbines today are still experiencing various reliability issues. To prevent the power quality pollution by defective turbines, a new power quality monitoring technique dedicated for individual wind turbines is developed in this paper, so that the quality of the power generated by an individual turbine can be monitored by the wind turbine condition monitoring system. Through simulated and physical experiments on a specially designed test rig, some encouraging results have been achieved. It has been shown that the proposed technique is not only valid for monitoring the power quality of an individual wind turbine, but helpful in detecting the mechanical and electrical faults occurring in the wind turbines.     

Performance monitoring results of the first grid-connected BIPV system in Colombia

This paper summarizes the operational performance results of the first grid-connected building integrated photovoltaic (BIPV) system installed in Colombia (in Bogotá, at 4°35′ latitude and 2.580 m altitude) after two years of monitoring. The performance monitoring was carried out with a sophisticated monitoring system, designed and implemented by us using the virtual instrumentation concept. The following parameters were measured: DC and AC power, inverter and system conversion efficiency, energy generated by the PV array, AC energy produced by the BIPV system, parameters to analyze power quality (%THD, harmonic components, frequency, voltage, flickers, power factor, active power, apparent power and reactive power), solar radiation in the inclination plane of the panels and environment temperature.The data obtained allowed to evaluate the general performance and the quality of the electric power generated by the photovoltaic plant. The results indicated that the power generated by the grid-connected BIPV plant fulfills the specifications demanded for such systems by National and International standards.     

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。     

Frequency control in micro-grid power system combined with electrolyzer system and fuzzy PI controller

The widespread use of various kinds of distributed power sources would impact the quality of the power supply within a micro-grid power system, causing many control problems. This paper focuses on the stability of micro-grid operation and discusses the control techniques of combining a micro-turbine with the fuel cell and electrolyzer hybrid system to expand the micro-grid system's ability to solve power quality issues resulting from frequency fluctuations. The paper examines the feasibility of fuel cell and electrolyzer hybrid system control, especially dynamic control of an electrolyzer system, to secure a real power balance and enhance the operational capability of load frequency control. The proposed control and monitoring system can be considered to be a means of power quality control, both to improve the frequency fluctuations caused by random power fluctuations on the generation and load sides and to relax tie-line power flow fluctuations caused by frequency fluctuations in the interconnected micro-grid power system.     

Performance and economic evaluation of the first grid-connected installation in Colombia,over 4 years of continuous operation

In January 2004, the Photovoltaic System Laboratory of the Universidad Nacional de Colombia installed the first grid-connected system in the country. A sophisticated monitoring system was implemented for measuring and analysing the performance and power quality of the building-integrated photovoltaic (BIPV) system. The meteorological and solar radiation data at the site of installation were also analysed for correlation with system performance. On the basis of 4-year monitoring results, the performance of the BIPV system was analysed from a component perspective (photovoltaic array and power conditioning unit) and global perspective (system efficiency, electrical energy, power quality, etc.). Energy analysis and economic evaluation revealed that, to get a trade-off between energy and economic viability, the BIPV system installations must be heavily subsidized.