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继电保护定值整定计算实战培训.ppt

  • 2026-04-29 07:38:03
继电保护定值整定计算实战培训.ppt
我们的进步需要您的关注
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1、收资工作应关注的问题

一次主设备(发电机、变压器等)资料

发电机参数(Xd、Xdˊ、Xd〞、空载额定励磁电压、与保护配合特性);

变压器参数(是否有特殊结构、过激磁能力);

一次主接线图(不同接线方式保护配置、出口等方式不尽相同、厂用分级、CT的安装位置、)

CT和PT参数(实际变比、多变比、实际位置、有无专用PT)

二次设备相关资料

保护配置图(配置是否合理、是否双重化、是否存在死区、出口方式)

保护厂家技术说明书(保护原理、保护逻辑、保护控制字的含义、定值单格式,有无特殊要求)

二次接线图(模拟量的取法、有无联跳、其他装置或回路中的定值)

2、短路计算应关注的问题

短路计算的目的

a、验证一次设备参数是否合理(每年要根据最新系统阻抗核对断路器遮断容量、流过断路器的电流);

b、保护灵敏度校验的需要。

3、整定计算应关注的问题

整定计算书的内容

系统参数表(发电机、变压器、CT/PT等设备参数和系统参数);

短路电流计算(阻抗图、化简过程、完整的计算过程、短路电流表);

定值计算(整定原则、计算公式含系数取值说明、必要的灵敏度校验、动作时间、出口控制字或出口方式)

几个概念

a、保护定值一般不是一个点,是一个范围,只要在合理范围内都是正确的;

b、原则:强化主保护(灵敏、可靠)、简化后备保护(特别是远后备保护)----防误动措施;

c、保护配合(针对整定原则有冲突、保护范围有重叠、动作顺序有要求);

d、定值的合理性(结合保护配置、保护对象的重要性,后面举例);

e、灵敏度校验(结合一次接线图和保护配置图考虑必要的校验过程)。

每天保证更新30+优质资源,为您提供2026电力领域的电力电气、继电保护及二次回路、电气试验、光储充微电网、风力发电、输配电工程、源网荷储、新型电力系统、虚拟电厂、现货与绿电交易、施工方案等

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  139. /yingpanguazai/ssd/ssd1/www/h.sjds.net/runtime/temp/ad153693ed39fba6d1bda2fe72512cde.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/h.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000546s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000914s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000336s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000292s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000618s ]
  6. SELECT * FROM `set` [ RunTime:0.000239s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000700s ]
  8. SELECT * FROM `article` WHERE `id` = 501144 LIMIT 1 [ RunTime:0.000484s ]
  9. UPDATE `article` SET `lasttime` = 1777604582 WHERE `id` = 501144 [ RunTime:0.007828s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.001299s ]
  11. SELECT * FROM `article` WHERE `id` < 501144 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001957s ]
  12. SELECT * FROM `article` WHERE `id` > 501144 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000395s ]
  13. SELECT * FROM `article` WHERE `id` < 501144 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005923s ]
  14. SELECT * FROM `article` WHERE `id` < 501144 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000926s ]
  15. SELECT * FROM `article` WHERE `id` < 501144 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008449s ]
0.097171s