补偿电容器

• With the consideration of most of our transformers " taps are changed manually and some fluctuate unnecessarily , this paper presents a supervision system of oltc based on plc control technique . then we combine this system with reactive power compensate device such as shunt capacitor to design a new supervision system of substation voltage and reactive power synthetic control based on plc fieldbus
  针对国内变电站电压调整大多依靠人工调节，且有载调压变压器( oltc )分接头动作频繁的特点，本文提出了基于plc控制技术的有载调压监控系统的研制方法，并以此监控系统为基础，结合并联补偿电容器组等无功补偿设备，设计了一种基于plc现场总线的变电站电压无功监控系统。
• Appling closed loop control strategy in the power factor dynamic compensation system . then the key techniques , for example , the fashion of real time sampling idle current and the fashion of compensation capacitor connected with , the time when the compensation capacitor are thrown up , are researched
  针对本系统的应用对象，确定了本系统中所应用的无功电流实时检测理论和方式、补偿电容器接线和分组方式、补偿电容器投入时刻的选择等关键技术；并对can技术应用于功率因素动态补偿系统进行了研究。
• Two network analysis and operation algorithms for balanced radial distribution systems , called forward - backward sweeping method of power flow solution and real - time control of capacitors installed on distribution systems , are presented in this thesis . distribution networks have characteristics such as mesh network on planning and radial networks on operation . the radial topology of distribution networks has been fully exploited such that a systematic branch and node numbering scheme is utilized to achieve storage and computational economy
  本文对配电网络中电压的调整，就电容器投切控制问题进行了深入的研究，在前人研究成果的基础上，针对配电网络结构特点，提出了采用前推回推法计算配电网络潮流，对配电网络就地补偿电容器的控制采用模糊控制技术，对全局优化控制采用逐次线性规划算法。
• When carrying on the distribution network reactive power coordination optimization , the discrete values of compensation capacitor are obtained using adaptive crossover step genetic algorithm on the basis of consideration of bo th network reconfiguration based on ts algorithm and compensation capacitors continuous variable optimization , accordingly the high efficiency and global optimal solution of network coordination reactive optimization are achieved
  对配电网络无功综合优化，本文提出在同时考虑基于禁忌算法的配电网络重构和补偿电容器连续变量优化的基础上，再应用自适应交叉步长遗传算法进行离散变量求解，获得补偿电容器的离散量值。
• The necessary and the economic benefit of reactive power compensation are analyzed in the paper , based on the essential principle . some different kinds of basic methods of reactive power compensation are discussed , and the problem of the optimum size for shunt capacitor bank ( scb ) is analyzed . the abnormal performances of scb in running status are researched and resolved
  本文从无功补偿的基本原理出发，分析了无功补偿的必要性及其所能产生的经济效益；确定了无功补偿的几种基本方法，对无功补偿中所遇到的最佳补偿容量问题进行了分析和探讨，研究并解决了补偿电容器在运行中的几种异常现象。
• In order to get effective control parameter , the real time detecting method for the reactive current is specified by using the instantaneous reactive power theory of three - phase circuit . on the basis of lonworks technology , hardware and software structure of intelligent node is designed , a / d sampling and data traffic by applying network variables are researched in detail . finally , the network node is configured by employing the lon works exploiting tools , monitor - control of host computer for lonworks network and detecting method for network data are studied dependent on the lns dde server
  本文基于已建立的系统总体结构，分析了无功功率补偿的关键技术、补偿执行单元的接线方式和补偿电容器组的分组方式；依据无功功率补偿原理，构建了补偿电容器组投切控制装置的结构，并确定了补偿电容器组的投切控制方式；为了获取有效的控制参数，确定了利用三相电路瞬时无功功率理论对无功电流进行实时检测的方法；以lonworks技术为基础，设计了智能节点的软、硬件结构，特别是对a d采样以及利用网络变量进行数据通信等方面做了详细研究；最后，利用lonworks开发工具对lonworks网络节点进行了配置，并通过lnsdde服务器，研究了上位机对lonworks网络的监控以及对系统网络数据的检测方法。
• The way of taking one nth out of capacitor ' s the first harmonic capacitive reactance as its nth harmonic impedance is verified whit the data from tang7c . according to the approximately estimating method , the first harmonic impedance of 220kv system is calculated . on the basis of the models , this paper gives the harmonic equivalent circuit of substation and gives the b ( n ) function of the harmonic time n . when the capacitors has different combination , b ( n ) ' s value will also change , with the inputting local measurement data , the paper studies the series and parallel resonance at the substation , and deduces that the reason the capacitor ' s fuse of tang6c is frequently interrupted is that its capacitor current contains a large number of 5th harmonics , and that the reason the discharging pt of tang7c capacitor being exploded is also that the 7th and 9th harmonic currents are amplified
  据此，对该站进行了串联谐振分析和并联谐振分析，并结合测试数据和有关变电站的运行记录，指出了导致该站电容器汤6c频繁烧保险的主要原因是5次谐波电流含量偏高，引起汤7c放电pt爆炸也是因为7次和9次谐波电流被放大。针对这些导致汤阴变电站补偿电容器故障的原因，提出了相应的谐波治理措施，包括针对汤6c电容器5次谐波电流含量偏高的原因，提出了停运汤6c电容器或者通过把汤sc电容器的部分容量并入汤6c电容器(汤sc其余部分停运)以增加汤6c谐波承受能力的措施;针对# 2变低压侧7次和9次谐波电流被放大的现象，提出了在汤7c电容器上加装一定百分比的串联电抗器的措施。
• First the paper use the different four network operating condition as the primary given conditions and set the 330 / 220kv transformer tap changer position in the standard position , adding the paralleled capacitor bank sets one by one into the network to change the amount of the input reactive power , thus obtained four sets of the 330kv and 220kv bus voltage and the active and reactive power losses changing curves
  进而研究了在每一确定并联补偿电容器组投入量条件下，随联变调压档位变化而产生出的一组并联补偿量、母线电压与损耗的变化曲线。进而选出了陇南电网在四种选定电网运行方式下、有功损耗最小条件下的最优综合控制组合曲线。
• Then the paper uses the same typical four network operating conditions as the primary given conditions and when adding one set of the parallel capacitor bank , changing the 330 / 220kv transformer tap changer position step by step to change the transformer ration , through this study methods this paper found out all the optimized combination of the tap changer position and the amount of input reactive power , also obtained four sets of the 330kv , 220kv and hokv s / s bus voltage and the active and reactive power losses changing curves . through analyzing the optimized combination control curve and the network power flow , the paper generalizes the rules as following : the chief measure of coordinative control is inputting shunt reactor in chengxian s / s in winter time both in the planning year of 2010 & 2005 ; in summer time in planning year of 2010 the chief measure is to input proper shunt capacitor
  本研究通过分析所获得的最优综合控制组合曲线及电网潮流，总结出了如下规则：陇南电网在2005年及2010年冬大、以及2005年夏小运行方式下，综合控制应以成县变投入适量并联补偿电抗器作为主要措施；在2010年夏小运行方式下则投入适量并联补偿电容器作为主要措施，再辅助以选择合适的主变有载调压分接头来调节，达到控制网内无功潮流分布合理、各变电站母线电压在理想的范围内时电网有功损耗最小，从而也提高了电网安全运行水平及供电质量。
• In order to ensure the whole system operate economically , power department equip transformer with onload tap changer and shunt capacitors for most distribution substations , according to the operating condition , adjusting the position of transformer taps and capacitors can control the variation of voltage and reactive power exchanger of distribution substations and power system in certain extent
  为确保整个系统运行经济性，降低网损，电力部门在大多数变电站配置了有载调压变压器和并联补偿电容器组，根据运行情况适当调节变压器分接头的位置和投切并联补偿电容器组，可以降低电压变化和变电站与系统的无功交换控制在一定的范围内，确保供电质量和电网运行的经济性。