RCS及LFP系列主变保护调试指导书(2)

目 录

目 录..........................................................................................................................................2

第一章 主变保护知识简介......................................................................................................8 1 变压器保护的外界影响和解决方法..................................................................................8

1.1 变压器变比的影响：...................................................................................................8

1.2 CT变比的影响：...........................................................................................................8

1.3 变压器接线组别的影响：.........................................................................................8

1.4 变压器保护中保护应符合的要求：.........................................................................8

1.5 根据以上介绍差动的接线、补偿和计算的处理如下：.........................................9

（1）CT接线要求：（以Y/Y/△－11为例）..................................................................9

（2）差动保护计算要实现的校正方式：.....................................................................9

（3）接线系数：.............................................................................................................9

（4）归算标么值方法：.................................................................................................9

（5）针对自耦变压器的保护：.....................................................................................9

（6）采取措施解决励磁涌流对差动保护动作的影响:.............................................10

（7）采取措施解决有载调压对差动保护的影响:.....................................................10

（8）采取措施解决区外短路对差动保护的影响:.....................................................10

第二章 现场调试操作指南....................................................................................................10 1 试验仪器简介....................................................................................................................10 2 调试前准备工作................................................................................................................12

2.1 试验仪器.....................................................................................................................12

2.2 试验注意事项.............................................................................................................12

2.3 保护装置的准备.........................................................................................................12 3 现场调试............................................................................................................................12

3.1 装置型号、外观、参数等检查（略）；...................................................................12

3.2 装置程序检查、更换和定值的输入：.....................................................................12

● 注意事项：...................................................................................................................13

3.3 输入压板等开关量检查：.........................................................................................13 4 交流回路检查(以下举例以5A为例)...............................................................................14

4.1 零漂检查：.................................................................................................................14

4.2 精度检查：.................................................................................................................15

(1)各侧电流电压幅值、相位检查：...........................................................................15

(2)相位检查：...............................................................................................................18

●注意事项：.................................................................................................................20 5 开出接点检查....................................................................................................................21

● 注意事项：...................................................................................................................21

5.1报警、信号接点检查..................................................................................................21

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