中压柜式气体绝缘金属封闭开关设备的应用

C-GIS的特点、优点及用途中压柜式气体绝缘金属封闭开关设备,指用气体而不采用处于大气压下的空气作为绝缘介质的12～40.5kV金属封闭开关设备,国际上简称中压C-GIS,亦有称GIS。C-GIS的主要特点是以低压力SF6气体、N2或处理过的干燥压缩空气作为一次主回路的绝缘介质,一些高压元     

中压充气柜的发展及现状

中压箱式气体绝缘金属封闭开关设备(简称C-GIS)是将一次回路主元件装在密封的金属箱体中，内充稍高于大气压的SF6气体或其混合气体作为绝缘介质。并以电缆终端作为进出线，整个高压系统处于完全封闭的状态，不受外界环境条件影响。是整体小型化、高可靠性、免维护的气体绝缘开关设备。     

大电流中压交流气体绝缘金属封闭开关设备的散热结构设计

中压交流气体绝缘金属封闭开关设备(C-GIS)通常由于发热元器件全部密封在狭小的充气隔室空间内,热量很难有效排出。特别是对于仅充有微正压气体的大电流交流气体绝缘金属封闭开关设备,由于充气隔室内气体分子密度接近大气压条件下的分子密度,当开关柜额定电流大于等于3 150 A时,柜内发热尤其严重,严重的发热缩短了开关设备的运行寿命。文中通过对气体绝缘金属封闭开关设备发热与散热机理的分析和试验结果的对比,提出了额定电流4 000 A的气体绝缘金属封闭开关设备降低温升的一种设计方案。实验结果表明该方案可满足标准要求。     

高压开关设备市场和技术的发展方向

分析了高压开关设备国内外市场。对使用较多的高压开关设备：SF6断路器(363～550kV)、自能灭弧式SF6断路器、气体绝缘金属封闭开关设备(GIS)、柜式气体绝缘开关设备(C-GIS)、金属封闭开关设备、预装式变电站、中压开关元件等的国内外现状和发展作了介绍。     

中压充气柜的发展及现状

1引言1.1概念中压箱式气体绝缘金属封闭开关设备(简称C-GIS)是将一次回路主元件装在密封的金属箱体中,内充稍高于大气压的SF6气体或其混合气体作为绝缘介质。并以电缆终端作为进出线,整个高压系统处于完全封闭的状态,不受外界环境条件影响。是整体小型化、高可靠性、免维护的气     

35kV气体绝缘开关设备国产化的若干问题

随着社会、经济的不断发展,工程建设的复杂程度的加大,用户对开关设备小型化、免维护、智能化的要求越来越高。中压领域尤其是在35kV电压等级,常规的以空气为绝缘介质的开关柜普遍体积较大(柜宽不小于1.2m,体积一般不小于7m3),重量较重(一般不小于2t),操作困难,尤其不能满足在高海拔、潮湿、污秽等恶劣环境条件下的使用要求。在这种背景下,C-GIS越来越被广泛关注。柜式气体绝缘金属封闭开关设备(CubicleGas-InsulatedSwitchgear简称为C-GIS),是高压GIS产品在中压领域的拓展。它是采用低气压的SF6气体、N2气体或混合气体作为开关设备…     

C-GIS设备在矿井供电系统中的应用探讨

中压式气体绝缘金属封闭开关柜(C-GIS)是一种小型化、智能化的GIS设备,是将GIS的SF6绝缘技术、密封技术与空气绝缘金属封闭开关设备制造技术进行有机结合的产物,具有绝缘介质压力低、可扩展、全屏蔽电缆终端进出线、不受环境影响等特点.从大型矿井供电系统的特点出发,介绍了C-GIS装置应用于矿井供电系统的优势及存在的问题,提出了相应的解决方法,并对C-GIS在矿井供电系统的应用做出了展望.     

智能化的中压C-GIS

柜式气体绝缘金属封闭开关设备(CGIS)是正在兴起的一种中压成套电器设备,它具有体积小、可靠性高,可适应多样性及多变环境条件等优点。文章叙述了CGIS产品的智能化技术问题、保护测控技术、在运行中的状态监测和诊断技术(如SF6气体密度监测、含水量监测、断路器机械故障监测等),对使用在CGIS中的传感技术也作了介绍。     

沈阳华利电器:争做环保科技的引领者

正沈阳华利电器集团是以沈阳华利能源设备制造有限公司为核心,由沈阳华德海泰电器有限公司、沈阳华利电力安装工程有限公司等10余家公司共同组成的企业联合体。产品及服务包括高压环保C-GIS、中压干燥空气绝缘C-GIS、中低压AIS开关设备、开关设备核心元器件,兼营风电产品、绝缘制品、电力和热泵安装及施工等。ZHN3-72.5 kv环保型气体绝缘金属封闭开关设备是由沈阳华利电器自主研     

中压环保气体绝缘金属封闭开关设备研究现状

为了减少温室气体排放,不用或少用含SF_6的中压开关设备是发展方向。文章介绍了中压环保气体绝缘金属封闭开关设备的发展现状、技术特点,分析了国内现有产品的主要技术参数以及应用情况,并与空气绝缘金属封闭开关设备和含SF_6的金属封闭开关设备进行了比较,指出中压环保气体绝缘金属封闭开关设备具有绿色环保、环境适应性强、体积小、高模块化等优势。围绕绝缘优化、温升控制、密封与检漏三个方面进行了分析和展望,对中压环保气体绝缘金属封闭开关设备的研制、改进与应用提供有益的参考。     

Insulation characteristics of vacuum interrupter for a new 72/84 kVC-GIS

This paper describes insulation technology for 72/84 kV vacuum interrupter for a new cubicle-type gas insulated switchgear (CGIS). The insulation performance has been increased significantly by a multi-gap shield configuration around the ceramic surface, which resulted in a 40% volume reduction of the vacuum interrupter. The CGIS housing the vacuum interrupter also reduced by 40% in volume. In the paper, the authors describe the basic characteristics on surface insulation and the area effect on surface insulation and their application to an new 72/84 kV CGIS     

一种新的应用于高压大容量变频器的失电跨越控制策略

高压大容量变频调速系统在某些应用场合,常伴随有电源瞬间跌落或消失的工况.功率电源瞬间失电跨越,是高压大容量变频调速系统的必备功能之一.本文结合实际的高压大容量变频器的控制和保护系统设计,提出了一种新的失电跨越控制策略.文中详细分析了这种策略的原理,控制及保护逻辑,最后给出样机试验结果.     

"十一五"期间电力线载波通信的发展对策

结合“十一五”电力通信规划电力线载波技术部分的内容和当前我国电力线载波通信技术的现状,提出了“十一五”期间高、中、低压电力线载波通信技术中一些具体的技术热点对策,指出电力线载波要做好电力通信的备用通道,要积极发展特高压载波和中压载波,今后的努力方向是高速宽带载波。文中提出的观点对我国电力通信运行和电力线载波通信设备生产企业具有一定的参考价值。     

多通道雷电流在线监测系统的研发和应用

雷电流特征参数的测量对于研究雷电放电过程以及雷电防护有着十分重要的意义。介绍了一套多通道雷电流在线监测系统。使用自行研制的基于柔性罗氏线圈的雷电流传感器,通过电磁耦合把大的雷电流转化为低电压信号;采用高速数据采集处理单元对耦合出来的电压信号进行高速采集,保证信号的完整性和精确度;利用通用分组无线服务技术（GPRS）进行无线数据传输;利用专家分析查询系统对远程接收系统测得的雷电流波形信号分析处理,并对系统进行远程控制,保证系统稳定运行。系统经过在500 kV神保双回线路、500 kV太山双回线路实际运行,于2013年6月25日捕获了雷击500 kV架空输电线路实测波形,成功监测到雷电流幅值、波头时间等特征量,同时监测并记录雷电流全波波形数据,为雷电监测数据比对与仿真反演提供更全面的基础资料。     

中高压电力电缆用乙丙橡胶绝缘材料的研究

用于电厂封闭母线的电缆、盾构电缆、煤矿用电缆等中高压电力电缆的绝缘越来越多地采用乙丙橡胶。本文研究了适合于中高压电缆使用的乙丙橡胶绝缘材料,从基体材料的选择、配合剂的选择、加工工艺等方面进行了探讨,所研制的乙丙绝缘材料及其制品具有优良的机械电气性能和加工性能。     

Development of a DC −1 MV insulating transformer for neutral beam injectors

A DC −1 MV insulating transformer has been developed for the power supply of the neutral beam injector (NBI ) at ITER (International Thermonuclear Experimental Reactor) . A DC long‐pulse −1 MV insulation structure between the primary and secondary windings, considering potential variation in the insulator for DC long pulse, has been designed. Simultaneous development of a compound bushing, which consists of an AC 500 kV condenser bushing inside a cylindrical fiber‐reinforced plastic tube, has been carried out. The DC −1 MV insulation design has been verified by high‐voltage insulation tests of AC 50 Hz 1300 kV peak for 1 min, DC −1200 kV for 1 h, and a long‐duration test of DC −1060 kV for 5 h. The results showed that the insulating transformer satisfies the power supply requirements for the ITER NBI . Copyright © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Optimal integrated planning of MV-LV distribution systems using DPSO

A new technique for optimal planning of MV and LV segments of a distribution system is presented in this paper. The main goal is to find optimally distribution transformer and substation locations and ratings, as well as, the route and type of Medium Voltage (MV) and Low Voltage (LV) feeders. The proposed technique is applicable to both uniform and non-uniform load densities areas. In this method, the planning area is divided into regions with relatively uniform load density such as urban, semi-urban, sub-urban. Each of regions is divided into zones, called LV zone. Each LV zone is supplied by an MV/LV transformer. The dimensions of LV zones are found based on the average load of each region. The placement and rating of MV/LV transformers, the type and route of LV conductors in an LV zone all depend on its loads’ location and power. Regarding the placement and rating of MV/LV transformers in planning area and the space of regions, the dimensions of a zone which is supplied by a HV/MV transformer, called MV zone, is determined. Additionally, the location and rating of HV/MV transformers as well as the feeder's routes and types are calculated. Since the dimensions of an LV zone influence the associated length of MV feeder, the MV feeder cost needs to be included in the total cost associated with the LV zone. This requires the MV feeder type to be known to calculate the corresponding cost. However, the MV feeder type is determined as an output from MV zone planning. As a result, an iterative based method is proposed to consider this common element in computations to develop integrated planning of both LV and MV zones. It is observed that the iterative technique quickly converges to the same results as the exhaustive search method.Discrete particle swarm optimization (DPSO) method is employed for solving the planning problem. The results are compared with nonlinear programming, genetic algorithm and exhaustive search methods. It is observed that DPSO is as accurate as the exhaustive search method for integrated planning of MV-LV distribution systems while its computation time is significantly lower.     

VSC-Based D-STATCOM With Selective Harmonic Elimination

This paper describes the design, implementation, and performance of a medium-size distribution-type static synchronous compensator (D-STATCOM) with the simplest two-level three-leg voltage-source converter (VSC) topology. Reactive-power control is achieved by phase-shift-angle control, and VSC harmonics are eliminated by selective harmonic elimination method (SHEM). VSC has been designed at the highest low-voltage level of 1 kV and connected to a medium-voltage (MV) bus through a low-pass input filter and $Delta/{rm Y}$ -connected MV/1-kV coupling transformer. At the MV side of D-STATCOM, line-current harmonics are minimized to comply with the IEEE Std. 519-1992 for the weakest supply conditions by applying 8-angle TLN2 elimination technique. This necessitates switching the water-cooled high-voltage insulated-gate bipolar transistor (HV-IGBT) modules at 850 Hz, thus eliminating 5th, 7th, 11th, 13th, 17th, 19th, 23rd, and 25th voltage harmonics at the input of VSC. By carefully designing the laminated bus system and selecting minimum stray-inductance dc-link capacitors directly mountable on the laminated bus, stray inductance of the commutation path is brought to a nearly absolute minimum of 60 nH, thus maximizing the utilization of wire-bond single-side cooled HV IGBTs and eliminating the need for resistor-capacitor-diode (RCD) clamping snubbers. The performance of SHEM, together with the phase-shift-angle control, has been tested in the field on a 0–1780-kVAr capacitive 6.3-kV VSC-based D-STATCOM ($-750/+900 hbox{kVAr}$ VSC) prototype. Field-test results show that SHEM, together with phase-shift-angle control, leads to optimum switching frequency and device utilization for HV IGBTs and high system performance at the expense of slower response as compared to the other known control techniques.      

CLiP限流保护器在中压配电系统中的应用初探

CLiP限流保护器融合了传统限流熔断器的所有优点,是一种一次分断、快速动作的中压故障保护装置。在中压系统中CLiP对有效限制短路电流、减少电能损耗、提高供电质量等,具有良好的作用。文章扼要论述了CLiP限流保护器(简称CLiP)的工作原理和应用实例以及电抗器能耗费用的计算方法。