无功补偿技术综述

分析了无功补偿的必要性 ,介绍了不同时期的无功补偿技术 ,以及应用于无功补偿的不同信号检测技术的各自优缺点。同时介绍了无功补偿装置自身谐波消除技术。最后分析了无功补偿技术的发展方向     

含有动态无功补偿器的供电系统自动电压控制设计

在介绍自动电压控制(AVC)系统设计背景的基础上,叙述了AVC系统的结构与配置、算法与流程、关键技术与应用优势,凸显了数据采集与监控、实时控制与快速补偿、人机联系与优化调节、历史数据管理等多项新技术的整合应用。试运行表明,供电系统AVC采用一级加二级控制方式运行,保证了AVC系统的先进性和补偿功能的稳定可靠;在地区调度和终端,通过数据采集与监控装置对地调进行全面的无功电压快速调节;利用动态无功补偿器的基于直流侧电容电压控制和系统无功电流反馈控制,可以可靠、灵活地提高无功电压的控制能力。     

基于滤波提升的SVG电力无功补偿研究

针对地铁电力系统稳定性要求高的需求,提出一种基于改进SVG的无功补偿装置,其主要由信号处理模块、处理采集单元、变流器以及三相电压输出端组成。在补偿过程中,由电网采集得到的电压信号从信号处理模块通过,信号处理模块中对应设置了自适应形态学滤波器对电流、电压信号进行滤波调理,去除冲击干扰,并获取SVG相位补偿的控制触发信号,进而实现对于变流器的电压补偿和无功功率调节。实验测试了5种不同类型的待无功补偿电能畸变信号,其结果表明,对于不同程度的电能畸变信号,所述装置能够进行有效的无功补偿,使得电压信号的整体畸变程度被控制在0.5%以下,从而使负载性能得到保障。     

低压动态无功补偿装置可控硅触发电路的改进

本文对低压动态无功补偿装置的可控硅触发电路进行了改进，以集成芯片取代了由分立元件组成的同步、功放及脉冲变压器等环节，使触发电路的结构大为简化，提高了装置的可靠性，降低了成本，为新一代低压置的推广应用奠定了基础。     

浅谈无功补偿技术

本文通过对无功的产生,无功对设备的危害,无功补偿量的计算分析,进行合理经济的配置补偿设备,并阐述了不同的补偿方案,投资分析。     

无功补偿装置的现状和发展趋势

从无功补偿的必要性出发,介绍了国内外无功补偿装置的使用,研究现状和发展趋势。     

Saft lithium-ion energy and power storage technology

Since they were first introduced in the early 1990s, lithium-ion batteries have enjoyed unprecedented growth and success in the consumer marketplace. Combining excellent performance with affordability, they have become the product of choice for portable computers and cellular phones. Building on the same energy and life cycle attributes which marked their consumer market success, but adding new high power storage capability, lithium-ion technology is now poised to play a similar role in the transportation sector. With major programmes in both high capacity and high power lithium-ion technology, Saft has developed a family of products which can address the power and energy storage needs for vehicles, utilities, aviation, satellites, and other applications where light weight, long life, and excellent energy or power storage capabilities are needed. Although further development and refinements are underway, Saft has made a major commitment to bring this technology to the market with the establishment of a major pilot and research facility in Bordeaux France. This paper discusses the performance of this family of products and their potential applications.     

储能技术在风力发电中应用研究的发展

介绍了各种储能方式在风电系统中应用的原理、优缺点和发展前景,提出了发展趋势,并指出了最有前景的储能方式.     

规模化电池储能系统的无功功率控制策略研究

无功功率补偿是电池储能系统并网运行时的重要应用。电池储能系统主要包括电池组、变流器以及设备监控系统等。电池储能用变流器可向电网提供无功功率。文章提出了规模化电池储能电站中各储能机组间的无功功率分配方法。采用仿真软件对电池储能系统的无功功率分配策略进行仿真分析,并基于张北储能试验基地的电池储能机组实例验证了控制策略的有效性。     

楼宇配电系统分相无功补偿与谐波抑制技术研究

通过对智能建筑电力、电子负荷的研究与分析,指出其负荷的主要特征及常见问题的解决办法。采用传统的单相采样、三相共补的无功集中补偿方式,因三相负荷的不平衡,易导致无功欠补偿或过补偿。为了避免这个问题,文中给出了无源滤波器与有源电力滤波器相结合的分相无功补偿方式,并通过计算机仿真结果验证其可行性。     

调峰电站及其蓄能技术

介绍了调峰电站在电力供应、电网调峰方面的作用和意义 ,概述了调峰电站的主要类型以及国内外的应用现状 ,指出寻找新的蓄能方法的重要性 ,并列举了目前几种主要的蓄能方法     

基于LabVIEW的线路无功补偿与节能

本文介绍了基于虚拟仪器LabVIEW的无功补偿方法.使用虚拟仪器开发软件,利用LabVIEW进行可视化编程,通过对无功补偿器进行开发,实现智能化的电力无功补偿系统,可以有效的减少电网中的有功功率的损耗,节能效果明显.     

基于建筑能源系统的混合储能技术研究现状

由于用户负荷需求的多元化和不确定性,单一类型的储能技术已不能满足高品质的建筑供能需要.通过耦合不同类型储能设备,实现多能源协调互补的混合储能技术应运而生.本文在建筑能源应用背景下,首先介绍了混合储能技术的原理,从建筑用能需求角度梳理了混合储能技术的研究进程,指出了现阶段混合储能的主要研究方向.其次基于混合储能的几种常见匹配方式,综述了热能、燃气化学能和电能等多类型能源混合存储技术的应用现状,并根据典型案例介绍了相应混合储能的系统组成、运行策略和系统特点,说明建筑用户的多能用能需求如何得到满足.最后对混合储能系统性能和经济性情况进行分析,提出了评估混合储能系统性能的重要指标和影响其经济性的主要因素.     

基于SVG的风电场无功补偿经济运行方法研究

针对双馈风机风电场无功功率平衡和电压稳定问题,由风电场母线电压控制点的电压偏差推算出风电场的无功功率需求,基于风机自身、输电线路、箱变等在内的风电场有功损耗最小的风电机组无功分配策略。根据风机和SVG无功补偿装置的无功补偿能力,考虑风机无功出力不足时,建立了基于风机与SVG协调无功控制方案。通过仿真和试验结果验证了该方案的可行性,与传统等无功容量比例分配相比,该方案能减小风电场网损、提高发电量,实现风电场的经济运行。     

Overview of current and future energy storage technologies for electric power applications

In today's world, there is a continuous global need for more energy which, at the same time, has to be cleaner than the energy produced from the traditional generation technologies. This need has facilitated the increasing penetration of distributed generation (DG) technologies and primarily of renewable energy sources (RES). The extensive use of such energy sources in today's electricity networks can indisputably minimize the threat of global warming and climate change. However, the power output of these energy sources is not as reliable and as easy to adjust to changing demand cycles as the output from the traditional power sources. This disadvantage can only be effectively overcome by the storing of the excess power produced by DG-RES. Therefore, in order for these new sources to become completely reliable as primary sources of energy, energy storage is a crucial factor. In this work, an overview of the current and future energy storage technologies used for electric power applications is carried out. Most of the technologies are in use today while others are still under intensive research and development. A comparison between the various technologies is presented in terms of the most important technological characteristics of each technology. The comparison shows that each storage technology is different in terms of its ideal network application environment and energy storage scale. This means that in order to achieve optimum results, the unique network environment and the specifications of the storage device have to be studied thoroughly, before a decision for the ideal storage technology to be selected is taken.