3．保护工作原理 ................................................................................................................10
3.1 装置起动元件............................................................................................................10 3.2 稳态比率差动保护 ....................................................................................................11 3.3 励磁涌流判别原理 ....................................................................................................12 3.4 TA 饱和的识别方法 .................................................................................................13 3.5 差动速断保护............................................................................................................14 3.6 差回路的异常情况判别.............................................................................................14 3.7 过激磁的判别............................................................................................................14 3.8 稳态比率差动的动作逻辑 .........................................................................................15 3.9 工频变化量比率差动.................................................................................................15 3.10 零序比率差动保护 ..................................................................................................17 3.11 过流保护..................................................................................................................18 3.12 零序方向过流保护 ..................................................................................................18 3.13 过激磁保护 .............................................................................................................19 3.14 阻抗保护.................................................................................................................20 3.16 TA、TV 异常判别原理 ..........................................................................................24 3.17 其它异常判别..........................................................................................................24
5.定值内容及整定说明........................................................................................................32
5.1 装置参数定值单 .................................................................32 5.2 RCS-978C 定值单 ..................................................................................................33
ZL_YJBH1108.0708
RCS-978 系 列 变压器成套保护装置
技术和使用说明书
(华东地区 500KV 版)
南瑞继保电气有限公司版权所有 2007.07（978XX 3.XX 版）
本说明书和产品今后可能会有小的改动，请注意核对实际产品与说明书的版本是 否相符。本说明书只适用于 RCS-978 保护装置的新机箱新面板结构。
附录 A 差动保护整定计算..................................................................................................40
1. 比率差动.....................................................................................................................40 2. 零序比率差动..............................................................................................................43
附录 B 后备保护整定计算..................................................................................................45
1. 复合电压闭锁方向过流...............................................................................................45 2. 零序过流.....................................................................................................................46 3. 变压器不接地运行时的后备保护 ................................................................................47 4. 自耦变压器的中接点零序电流保护.............................................................................48 5．阻抗保护....................................................................................................................48
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目录
1．概述.................................................................................................................................1
2. 装置的技术参数 ...............................................................................................................7
2.1 机械及环境参数..........................................................................................................7 2.2 额定电气参数..............................................................................................................7 2.3 主要技术指标..............................................................................................................7
1.1 应用范围.....................................................................................................................1 1.2 性能特征.....................................................................................................................1 1.3 新功能和新特点..........................................................................................................2 1.4 保护配置.....................................................................................................................4