随着转子的高速旋转使熔化物在离心力的作用下飞出，熔化部位开始放电产生电弧，导致转子电流剧烈变化，为了维持出口电压稳定，调节器不断调节励磁电压以保持发电机出口电压的稳定。在这个过程中，随着励磁调节器的反复强励，重复着电弧的点燃与熄灭，发电机导电螺钉开始向转子内部熔化，当强励电压不能满足电弧点燃时，发电机开始失步，汽轮机转速开始上升，终机械超速动作，关闭主气门，发电机进入逆功率状态。从发电机转子端部看到负极导电杆有过热迹象，导电杆绝缘已经严重碳化。
综上分析1号发电机在运行中滑环的导电螺钉松动，导致接触电阻增大、出现过热引起弧光放电，是造成此次事故的直接原因。
LONG蓄电池WP7-12（28W） 系列说明及简介销售
广隆LONG蓄电池公司自1990年创立以来已20年，是国内取得保税工厂及股票上市之铅酸蓄电池製造厂。近五年以来每年电池出货数达30%的複成长;创造高达40亿元的营业收入。为求分散生产风险与扩大销售市场，採取国际分工的产销政策，早在1996年即于越南国之滨沥县设厂，为早于当地建立电池生产基地之投资之外资企业。后于1999年与2000年分别完成ISO9001与ISO14001认证，2002年通过OHSAS18001认证，并于同年于台湾挂牌上市。至2007年又完成佔地达20万平方公尺之越南德和厂兴建，2008年通过TL9000通信/通讯电子业品质系统验证，并于2009年底起至2010年持续进行德和厂生产基地第二第三期的扩建工程。
于产品的製造，广隆除了对各生产环节严格的把关外，从技术体系到管理方法与业务流程都有著革命性的创新与实践。我们的产品在製造及确保产品遵循依品质管理系统下，全系列密闭式电池产品皆通过UL安规标准。另针对欧洲区安控市场的高品质需求，我们亦通过了德国VdS的认证。产品品质深受国内外之跨国企业的厚爱与认可。我们相信，客户满意度不仅只来自于产品本身，即时的服务提供与客户的友好关系建立更能提升客户满意的附加价值。广隆不仅获颁客户满意度金质奖外，产品亦荣获经济部评选为『台湾精品奖』的肯定。
我们的创新发展来自丰硕经验与能量，广隆拥有产品线广度完整及弹性製造技术的竞争优势，迄今已开发出超过400种不同用途之电池，并持续开发电动车，太阳能及风力等再生能源用电池。对于产品创新发展无穷尽的追求与态度，广隆自1993年起陆续与工研院材料所合作深度放电用密闭式电池、电动机车用电池及高功率改质电池等之开发，并多方引入新技术，更投资了许多先进的设备来彰显我们对客户与时俱进；永续发展的信念与承诺。
立足台湾，深耕越南，放眼环宇。广隆，以能为全球消费者提供更洁淨能源，并担负社会与环境的责任与维护的决心，进而带动公司持续成长与永续经营，兢兢业业努力不懈。
Guanglong long battery Co., Ltd. has been established for 20years since 1990. It is a professional lead-acid batterymanufacturer that has obtained bonded factory and stock listing inChina. In the past five years, the number of battery shipments peryear has increased by 30%, and the business income has reached 4billion yuan. In order to diversify the production risk and expandthe sales market, we adopted the production and marketing policy ofinternational division of labor. As early as 1996, we set up afactory in Binli County, Vietnam, which is a foreign-fundedenterprise with investment earlier than the local establishment ofbattery production base. After 1999 and 2000 respectively completedISO9001 and ISO14001 certification, passed OHSAS18001 certificationin 2002, and listed in Taiwan in the same year. By 2007, it hadcompleted the construction of Dehe factory in Vietnam with an areaof 200000 square meters. In 2008, it had passed the TL9000communication / communication electronic industry quality systemverification. From the end of 2009 to 2010, it continued to carryout the expansion project of the second and third phase of theproduction base of Dehe factory.
In the manufacturing of products, Guanglong has revolutionaryinnovation and practice from technical system to management methodand business process, in addition to strict control over allproduction links. Our products are precisely manufactured andguaranteed to follow the quality management system. All series ofsealed battery products have passed UL safety standard. Inaddition, we have also passed the German VDS certification for thehigh-quality demand of the security control market in Europe.Product quality is deeply loved and recognized by well-knownmultinational enterprises at home and abroad. We believe thatcustomer satisfaction not only comes from the product itself, butalso the value added of customer satisfaction can be improved byestablishing a friendly relationship with customers through instantservice provision. Therefore, Guanglong won not only the Gold Awardfor customer satisfaction, but also the "Taiwan boutique Award" bythe Ministry of economy.
Our innovation and development come from abundant experience andenergy. Guanglong has a complete product line and competitiveadvantage in flexible manufacturing technology. So far, it hasdeveloped more than 400 kinds of batteries for different purposes,and continues to develop batteries for renewable energy such aselectric vehicles, solar energy and wind power. For the endlesspursuit and attitude of product innovation and development,Guanglong has cooperated with the Institute of materials of theInstitute of engineering and research since 1993 to develop thesealed battery for deep discharge, the battery for electric motorvehicles and the battery for high power upgrading, and introducednew technologies in many ways, and invested many advanced equipmentto show our faith and commitment to keep pace with the times andsustainable development.
Based in Taiwan, deeply ploughing in Vietnam, looking around theworld. Guanglong is committed to providing cleaner energy forglobal consumers, shouldering social and environmentalresponsibilities and maintenance, so as to drive the company'ssustainable growth and sustainable operation, and make unremittingefforts.
广隆LONG蓄电池基本特性：
1.贮藏容量高。
2.充放电无酸雾。可大电流充电（0.8C-1C
3.充电接受能力强。8秒内30C放电电流，
4.可大电流放电。电流不损伤。可多次尽放电，
5.可超深度放电。电池不会损害。可在50~60℃温度下使用。
6.适温性极强。完全免维护，
7.自放电小。全充电后，常温存放一年仍可正常使用。为铅酸电池的一倍。
8.使用寿命长。报废后全部资料可再生回收，
9.绿色环保无污染。电解质无污染。能在各种恶劣的环境下安全使用。
10.抗震性能好。使用时可任意方位放置。
Basic characteristics of Guanglong long battery:
1. High storage capacity.
2. There is no acid mist during charging and discharging. Highcurrent charging (0.8C-1C
3. Strong charging acceptance ability. 30C discharge current in8 seconds,
4. High current discharge. The current is not damaged. It candischarge several times,
5. It can discharge beyond the depth. The battery will not bedamaged. It can be used at 50 ~ 60 ℃.
6. The temperature adaptability is very strong. Completelymaintenance free,
7. Small self discharge. After fully charging, it can still beused normally after being stored at normal temperature for oneyear. Double the lead-acid battery.
8. Long service life. All data can be recycled afterscrapping,
9. Green and environmental protection without pollution. Noelectrolyte pollution. It can be used safely in all kinds of badenvironment.
10. Good seismic performance. It can be placed in anydirection.
设备现场应放置操作指南，指导现场操作，各种开关、刀闸、熔断器、插接件及接线端子等部位接触良好、无电蚀与过热现象。
事故过程与检查结果：
，某电厂1号发电机在运行中滑环的导电螺钉松动，导致接触电阻增大，出现过热引起弧光放电，造成导电螺钉烧损，机组紧急手动解列。
事故前工况:有功188MW，无功76MVAr，定子电流7500A，定子电压15.84kV，转子电压290V，转子电流1578A，主励磁机定子电压253V，主励磁机定子电流1122A，机组AGC投入运行。
2009年09月30日18时18分，警铃响，1号发电机来“A套调节器强励动作”、“发电机失磁保护动作”信号、“发变组保护屏失磁保护Ⅰ（失磁减载）动作”，“转子一点接地保护告警”、“发电机逆功率告警”，有功负荷下降至零。运行人员现场检查发现1号发电机转子滑环处冒烟有火花。18时23分，手动解列发电机。
检查发电机转子励磁碳刷无过流、过热现象，刷架完好。用500V兆欧表测发电机转子绝缘电阻为0欧姆，对刷架、碳刷及各部绝缘部分进行清理，测绝缘，仍然为0欧姆。对刷架拆除，进行解体检查，发现发电机转子正、负极滑环表面光滑、无过热烧伤痕迹，负极侧滑环导电螺钉烧损，风扇环负极侧根部有过热熔化痕迹。发电机滑环罩励磁机侧密封环与转子轴有摩擦痕迹，并且密封环的密封垫过热。风扇环护板负极滑环侧有熔化的金属颗粒，分析为导电螺钉熔化后，在高速旋转时甩到护板的侧壁上。转子抽出后，检查转子外观无异常、通风孔无堵塞现象。
原因分析：
查看DCS记录，转子电压和电流在18时17分39秒之前运行正常，转子电压跟踪发电机出口电压调节转子（励磁）电流正常，定子电压稳定，励磁系统、发电机转子系统故障前一直正常运行。18时17分39秒，转子电流和转子电压开始摆动，此时定子电压基本稳定运行，造成转子电流和电压摆动的原因分析为：转子回路导电螺钉在集电环表面的压紧螺母松动，造成接触电阻增大，螺母与集电环接触部位开始发热，随着发热与氧化的加剧，终导致螺母与集电环接触部位熔化（见附图片）。
（3）各种缆线布放整齐，标识规范。
（4）输出电压必须保证蓄电池要求的浮充电压和均充电压，设备容量必须保证负载电流和0.1C10A的蓄电池充电电流的容量。
（5）定期检查并记录设备各项运行参数，及时掌握设备的运行状态和负载情况。
（6）每月完成输入、输出开关、熔断器、缆线的温度测试，认真做好记录。
新装及检修的设备在投入运行前，必须进行性能测试，主要测试设备运行的稳定性、可靠性、带负载能力、告警的及时性等，性能测试通过签字确认后方可投入运行。