ImageVerifierCode 换一换
格式:PPT , 页数:39 ,大小:711KB ,
文档编号:3041868      下载积分:25 文币
快捷下载
登录下载
邮箱/手机:
温馨提示:
系统将以此处填写的邮箱或者手机号生成账号和密码,方便再次下载。 如填写123,账号和密码都是123。
支付方式: 支付宝    微信支付   
验证码:   换一换

优惠套餐
 

温馨提示:若手机下载失败,请复制以下地址【https://www.163wenku.com/d-3041868.html】到电脑浏览器->登陆(账号密码均为手机号或邮箱;不要扫码登陆)->重新下载(不再收费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  
下载须知

1: 试题类文档的标题没说有答案,则无答案;主观题也可能无答案。PPT的音视频可能无法播放。 请谨慎下单,一旦售出,概不退换。
2: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
3: 本文为用户(三亚风情)主动上传,所有收益归该用户。163文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(点击联系客服),我们立即给予删除!。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

1,本文(网络互动营销的几个关键点课件.ppt)为本站会员(三亚风情)主动上传,163文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。
2,用户下载本文档,所消耗的文币(积分)将全额增加到上传者的账号。
3, 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(发送邮件至3464097650@qq.com或直接QQ联系客服),我们立即给予删除!

网络互动营销的几个关键点课件.ppt

1、IEEE C37.234 Guide for Protective Relay Application to Power System Buses B.Kasztenny (Chairman), S.Conrad (Vice-Chairman), P.Beaumont, K.Behrendt, O.Bolado, J.Boyle, G.Brunello, J.Burger, F.Calero, S.Chano, G.Dalke, A.Darlington, H.DoCarmo, D.Fontana, Z.Gajic, J.Holbach, L.Kojovic, F.Lopez, D.Lukac

2、h, D.McGinn, J.Miller, P.Mysore, J.OBrien, B.Pickett, S.Sambasivan, G.Sessler, V.Skendzic, J.Smith, D.Tholomier, M.Thompson, J.Uchiyama, D.Ware, D.Weers, R.Whittaker, R.Young, S.ZochollPresentation to the Main Committee of PSRC, January 14, 2010, Orlando, FL迈鼎 http:/Table of Contents Definitions Bus

3、 configurations Introduction to bus protection Relay input sources Bus protection methods Application of bus protection schemes AnnexesDefinitions 23 new terms defined Bus protection and primary equipmentbreaker substitution Temporary usage of a bus tie breaker in a multiple bus configuration to sub

4、stitute for one of the network elements circuit breakers, typically for the maintenance of the latter; also known as breaker transfercheck zone Nonselective part of a multi-zone bus protection system measuring current flows around the entire station and supervising selective tripping from individual

5、 bus zones of protectionstub bus Area of a bus or line that becomes isolated from the original zone of protection or an area that loses protection due to the loss of sensing to zone protection relaysBus design considerations Continuity of service for the bus and essential network elements Equipment

6、maintainability and network switching flexibility Economical and footprint constraints Sectionalizing requirements to avoid exceeding breaker fault duties Ease of future bus expansionBus arrangements Single bus Main and transfer bus Double-bus double-breaker Double-bus single-breaker Breaker-and-a-h

7、alf Ring busMain and transfer busMain and transfer busIntroduction to bus protection Zones of protection Bus protection methods Scheme selection guidelinesZones of protectionDynamic zones of protectionDynamic zones of protectionDynamic zones of protection Zones of protectionBus protection methods Di

8、fferential Differentially-connected overcurrent Instantaneous Time-delayed Percentage-restrained differential Restrained Advanced microprocessor based High-impedance differential Resistor-stabilized overcurrent High-impedance Partial differential overcurrent Fault busBus protection methods Zone-inte

9、rlocked schemes Simple blocking Directional blocking Time-coordinated relays overlapping the bus Protection (sensors) built into the gas isolated switchgear* Not covered in the GuideScheme selection criteria Bus arrangement and flexibility Fixed vs. switchable buses Availability and characteristics

10、of CTs For reconfigurable buses, availability of auxiliary contacts of disconnect switches Performance requirements Security, Selectivity, Speed, Sensitivity Cost and complexityScheme selection Relay input sources Current transformers Types Accuracy classes Equivalent circuit & time to saturation No

11、 universal CT requirements Voltage Transformers Voltage trip supervision Directional blocking schemes Position of switches and breakersDetailed scheme review Section 7 gives in-depth review of each method following a consistent patternTheory of operationSetting considerationsCT requirementsApplicati

12、on considerationsExample High-impedance schemeVoltage setting:Above the maximum voltage for an external fault assuming that one CT saturates completely High enough so that pickup current is above the short circuit current on the secondary of any PT or station service transformer inside the bus zoneB

13、elow the accuracy class voltage rating of the lowest accuracy class CT in the differential circuit Low enough so that pickup current is below the minimum fault current for the busExample High-impedance schemeCT requirements:CTs dedicated to bus protection (cannot be shared)Equal CT ratios*The accura

14、cy class voltage rating of the CT with the lowest accuracy class above the selected voltage setting, with margin* Ratio matching covered but discouragedApplication of bus protection Partial differential Loads Capacitor banks Application with overcurrent and distance relays Combined bus and transform

15、er zone Buses with directly connected grounding transformers Application of auxiliary transformers Generally discouragedApplication of bus protection Applications with paralleled CTs Generally discouraged Guidelines includedApplication of bus protection Application of auxiliary tripping relays Locko

16、ut relays Non-lockout relays Ratings Automatic reclosing after bus faults Dynamic bus replica Check-zone Voltage trip supervisionDynamic bus replicaPosition of switches and breakers“If not opened, then closed” logicIn-service transferIn-service transferIn-service transferCheck zoneCheck zoneApplicat

17、ion of bus protection Application of CT trouble detection Detection methods Fallback strategies Reliable, selective tripping at the differential zone boundary Line-side CT Bus-side CT Bus coupler considerations The role of Breaker Failure protectionLine-side CTBus coupler considerationsBus coupler c

18、onsiderationsApplication of bus protection CT column ground fault protection In-zone grounds Surge arresters Safety grounds and circulating current while testing In-zone grounding of out-of-service elements In-service transfer of network elements and breaker substitutionBreaker substitutionApplicati

19、on of bus protection Stub bus considerations Breaker Failure considerations Backup protectionLocal backup Duplicated relays BF, batteries, wiring Reverse-looking distance relays Overcurrent relaysRemote backupAnnexes Setting example for a high-impedance scheme (Annex A) Logic example for double-bus

20、single-breaker configuration (Annex B) Bus and Breaker Failure protection Two zones, check zone and voltage supervision In-service transfers and breaker substitution Setting guidelines for differentially connected OC schemes (Annex C)C37.234 Highlights Complex bus arrangements and switching Advanced bus protection topics (reconfigurable buses, mP relays) Balanced coverage of high- and low-impedance schemes Protection scheme selection guidelines CT requirements given per scheme List of application considerations Detailed examples for most common schemes

侵权处理QQ:3464097650--上传资料QQ:3464097650

【声明】本站为“文档C2C交易模式”,即用户上传的文档直接卖给(下载)用户,本站只是网络空间服务平台,本站所有原创文档下载所得归上传人所有,如您发现上传作品侵犯了您的版权,请立刻联系我们并提供证据,我们将在3个工作日内予以改正。


163文库-Www.163Wenku.Com |网站地图|