共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
新型电能质量监测评估系统设计及应用 总被引:2,自引:0,他引:2
在电力市场环境下,电能质量在线监测系统是现代电力系统在电能质量监测上的必要选择,文中采用基于网络地理信息系统(GIS)的电能质量监测系统能够实时监测电网输电线路上的电能质量状况,使电网管理人员能够及时、全面了解电能质量的状况.系统采用模块化设计,具有很强的扩展性和兼容性;地理信息模块利用MapXtreme控件开发,具有丰富的地图信息.此系统较之传统的电能质量监测系统具有很大的进步,增强了电能质量管理的伸缩性和互操作性. 相似文献
4.
5.
新型电能质量监测系统 总被引:1,自引:0,他引:1
电能质量在线监测系统是现代电力系统在电能质量监测上的必然需要,通过实时的,无缝的对电网信号进行监测,在时间维度上对电网的电能质量全面了解.从动态电能质量监测系统的发展和软硬件的具体实现上阐述了动态电能质量监测的需求和基本的实现方法. 相似文献
6.
7.
8.
9.
10.
针对电能质量监测系统的远程主动和协调控制问题,构建出硬件基于ARM+DSP双系统和软件基于多Agent技术的开放、主动的电能质量监测系统。这种模型符合现阶段电网分布式结构特点和电力市场的发展趋势,满足目前电网电能质量监测系统的需求。该系统应用于湖北电网和浙江电网中,检测暂态电能质量指标和稳态电能质量指标,实现对电网实时监测的功能。应用结果准确反映出电网电能质量的状况,通过本系统可以有针对性地改善电网电能质量并且提高经济效益。 相似文献
11.
12.
Il-Yop Chung Dong-Jun Won Joong-Moon Kim Seon-Ju Ahn Seung-Il Moon 《Electric Power Systems Research》2007
This paper presents a network-based power quality (PQ) diagnosis system. In accordance with the IT development, PQ monitoring networks are prevalent in many existing systems because such networks can provide system-wide insights to users. The developed PQ management system of this paper also consists of network-based devices such as PQ monitoring systems (PQMS), the PQ Server, and the PQ diagnosis system (PQDS). PQMSs measure power quality data at various points in the power systems and send them to the PQ Server through the Ethernet. The PQDS diagnoses the PQ data stored in the PQ Server in order to provide various diagnosis functions to the users. However, in many existing PQ monitoring networks, it is still difficult to pin-point the event location and to find appropriate solutions. The developed PQDS focuses on identifying power quality events, especially on finding the fault location and the type of faults as well as various statistical and stochastic analyses. Therefore, it can help users cope well with power quality problems with the right measure in the right place. The PQ diagnosis system also provides event trend diagnosis, stochastic diagnosis, and PQ indexing functions for user convenience. 相似文献
13.
电能质量监测评估系统的研究 总被引:6,自引:2,他引:6
为了准确、快速监测、分析和改善电力系统电能质量,基于虚拟仪器技术和面向对象编程方法开发了一套电能质量监测评估系统。该系统由数据监测子系统、通信子系统、数据评估子系统组成,采用快速傅立叶变换(FFT)提取电压、电流波形中的基波和各次谐波分量的幅值和相位信息,进而得到频率、基波有效值、谐波、三相不平衡、电压波动与闪变5项电能质量指标以及有功功率、无功功率、功率因数等参数。采用虚拟仪器技术来实现数据采集、数据上传、数据分析等功能,极大的降低了成本。现场应用的结果表明,系统具有实时性强、运行稳定等优点。 相似文献
14.
直接影响用户的电能质量问题主要出现在配电系统和低压侧,而目前的电能质量监测系统主要是基于中、高压系统侧来考虑的或者是简单的手持式监测仪,均不能满足普通用户的监测要求。本文分析了与普通用户密切相关的电能质量指标,指出从墙上电源插座采集电压信号,就可以完全掌握普通用户的电能质量状况,在此基础上提出了基于普通用户侧的电能质量监测仪的思路,探讨了相关的网络结构和关键技术方法。 相似文献
15.
基于低压用户侧的电能质量监测研究 总被引:4,自引:0,他引:4
现代社会的快速发展,使越来越多的低压用户开始关注电能质量问题.而到目前为止,实际应用中的电能质量监测主要是基于系统侧来考虑的,监测节点主要选在变电站以及关键用户接入点处.本文分析了与低压用户密切相关的各项电能质量指标,指出从墙上电源插座采集电压信号,对低压用户而言,就可以完全掌握其电能质量状况,在此基础上提出了基于低压用户侧的电能质量监测的思路,探讨了相关的网络结构和关键技术方法. 相似文献
16.
A distributed optical-fiber acoustic sensor is an acoustic sensor that uses the optical fiber itself as a photosensitive medium, and is based on Rayleigh backscattering in an optical fiber. The sensor is widely used in the safety monitoring of oil and gas pipelines, the classification of weak acoustic signals, defense, seismic prospecting, and other fields. In the field of seismic prospecting, distributed optical-fiber acoustic sensing (DAS) will gradually replace the use of the traditional geophone. The present paper mainly expounds the recent application of DAS, and summarizes recent research achievements of DAS in resource exploration, intrusion monitoring, pattern recognition, and other fields and various DAS system structures. It is found that the high-sensitivity and long-distance sensing capabilities of DAS play a role in the extensive monitoring applications of DAS in engineering. The future application and development of DAS technology are examined, with the hope of promoting the wider application of the DAS technology, which benefits engineering and society. 相似文献
17.
计及分布式电源的电能质量监测点优化配置 总被引:1,自引:0,他引:1
为实现智能配电网对电能质量(PQ)进行全面监测和扰动事件智能诊断,并考虑系统成本优化和分布式电源影响,分析了现有监测点配置方法存在的三个缺陷,提出需要同时考虑节点电压凹陷域和电流信息全网可观测的优化思路。改进了二进制粒子群优化算法(BPSO)的模型和步骤,并构建评价函数,提出一种基于改进粒子群优化的电能质量监测点配置的算法。通过改进的BPSO迭代,智能地布置监测点,实现了系统性能和经济成本的最优化。最后,在四种不同结构的配电网络中进行仿真应用。结果表明,该算法能有效地实现PQ监测点优化配置,以较低的成本实现了配电网的全面监测并满足扰动事件智能诊断和精确定位的需求,且算法具有较好的收敛性和适用性。 相似文献
18.
Hong-Tzer Yang Chiung-Chou Liao 《Power Delivery, IEEE Transactions on》2001,16(3):353-360
By means of the wavelet transform (WT), a power quality (PQ) monitoring system could easily and correctly detect and localize the disturbances in the power systems. However, the signal under investigation is often corrupted by noises, especially the ones with overlapping high-frequency spectrum of the transient signals. The performance of the WT in detecting the disturbance would be greatly degraded, due to the difficulty of distinguishing the noises and the disturbances. To enhance the capability of the WT-based PQ monitoring system, this paper proposes a de-noising approach to detection of transient disturbances in a noisy environment. In the proposed de-noising approach, a threshold of eliminating the influences of noises is determined adaptively according to the background noises. The abilities of the WT in detecting and localizing the disturbances can hence be restored. To test the effectiveness of the developed de-noising scheme, employed were diverse data obtained from the EMTP/ATP programs for the main transient disturbances in the power systems as well as from actual field tests. Using the approach proposed in this paper, remarkable efficiency of monitoring the PQ problems and high tolerance to the noises are approved 相似文献
19.
分布式电能质量监测系统硬件平台的设计 总被引:9,自引:0,他引:9
现代社会的快速发展对电能质量,特别是暂态电能质量的要求越来越高,原有的测量技术、装置已不能满足要求,必须发展新的监测技术.本文根据电能质量监测新技术的各项指标和要求,提出了分布式电能质量监测系统的思路,探讨了相关的硬件监测平台的特点和设计方法,并结合具体装置详细分析了DSP技术、GPS同步技术、TCP/IP通讯协议等关键技术在分布式电能质量监测系统中的应用. 相似文献