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PPT | 云南电网公司配网故障录波及行波技术应用探讨

  • 2026-05-12 10:42:32
PPT | 云南电网公司配网故障录波及行波技术应用探讨
         
核心速览
本文探讨了云南电网公司配网故障录波及行波技术的应用情况,包括云南配网现状、故障录波应用及行波技术探索。
01
云南配网现状
云南电网供电面积
:云南国土面积39.41万平方公里,人口4693万人,每平方公里119.08人。
云南电网配电线路情况
:供电半径大、线路长,分支多且多为大分支,通道复杂(跨越林区、山区、峡谷),网架薄弱(单辐射供电多、档距大),架空裸导线多,接地故障频发。
云南气候情况
:春季局部大风、夏秋雷电频繁、冬季局部覆冰严重,导致中压故障较多、低压故障频发,故障停电影响客户平均停电时间60%以上。
云南配网故障查找情况
:主要依靠配电自动化开关和故障录波数据分析,关键环节为缩小停电范围、故障查找时间及降低故障次数;配电自动化开关已实现缩小故障停电范围,故障录波数据分析用于辨识故障设备类型,行波定位装置等处于探索应用阶段。
02
云南配网故障录波应用情况
间歇性隐蔽故障定位
:通过分析录波数据零序电流和零序电压相位关系,锁定瞬时故障区段。
故障设备类型辨识
:自2019年收集整理不同设备故障录波数据,结合设备结构特性和故障录波数据特征建立典型录波数据库,可辨识以下类型:
  • 避雷器故障:零序电流幅值1A及以上,如5.048A、6.278A,故障相电流波形与零序电流一致
  • 绝缘子故障:零序电流幅值1A以下,如0.446A、0.442A,故障相电流突变量小
  • 电流航插插错:有零序电流、无零序电压,三相电流一相无值
  • 安全距离不足(树障):多发展为相间或三相短路
  • 三相五柱式互感器问题:有零序电压、无零序电流,零序电压三次谐波含量大
  • 导线放电:零序电流幅值1A以下,如0.203A,波形呈针尖形
03
云南配网行波技术应用探索情况
云南配网行波定位技术路线
:包括独立式行波定位装置、FTU+外挂式行波定位装置、FTU+行波定位一体式装置3种技术路线,涉及网级生产运行支持系统、配电自动化主站2套系统和3种前端采集装置。
外挂式行波定位装置改造情况
:通过串接到FTU二次采样交流回路中,与配电自动化开关共用一次电流/电压互感器,实现高频采样和录波。
应用情况
:现场安装独立式行波定位装置70套,在线率95%,故障次数31次,定位31次,300米内准确率80.06%、600米内96.67%、1000米内100%,异常原因为绝缘子弱击穿时定位范围较大;安装FTU+外挂式行波定位装置6套,在线率94%,因2025年8月安装后线路未发生故障,故故障次数和定位次数均为0。
04
下一步思考
将故障设备辨识功能与行波定位功能深度集成至配电自动化开关(FTU/DTU),构建配网故障感知与处置的一体化能力。
集成后的配电自动化开关将具备四大核心能力:
  1. 故障隔离:快速切断故障区段,避免故障范围扩大。
  2. 行波定位:利用行波技术精准测算故障位置,缩小查找范围。
  3. 故障设备类型辨识:自动识别故障发生的设备类型,辅助故障研判。
  4. 行波高频信号采集分析:捕捉并分析行波高频信号,挖掘设备潜在隐患。
05
应用价值
故障处置效率提升
:通过多能力协同,实现故障更精准定位,大幅缩短故障查找与处置时间。
主动运维能力强化
:基于高频信号分析快速定位设备隐患,指导现场人员提前消缺,从源头降低故障发生次数,提升配网运行可靠性。
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  1. CONNECT:[ UseTime:0.001205s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001419s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000587s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000818s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001326s ]
  6. SELECT * FROM `set` [ RunTime:0.000539s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001450s ]
  8. SELECT * FROM `article` WHERE `id` = 512808 LIMIT 1 [ RunTime:0.002348s ]
  9. UPDATE `article` SET `lasttime` = 1778720117 WHERE `id` = 512808 [ RunTime:0.009306s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000790s ]
  11. SELECT * FROM `article` WHERE `id` < 512808 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001260s ]
  12. SELECT * FROM `article` WHERE `id` > 512808 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001389s ]
  13. SELECT * FROM `article` WHERE `id` < 512808 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002734s ]
  14. SELECT * FROM `article` WHERE `id` < 512808 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006848s ]
  15. SELECT * FROM `article` WHERE `id` < 512808 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008984s ]
0.233186s