当前位置:首页>教案>教案29:一文搞懂什么是“四遥”?(附电能质量的四遥)

教案29:一文搞懂什么是“四遥”?(附电能质量的四遥)

  • 2026-04-24 06:52:29
教案29:一文搞懂什么是“四遥”?(附电能质量的四遥)
  上周三下午,调度台接到系统提示:城西110kV变电站某出线电流持续偏高。值班同事调出实时曲线——负荷已逼近420A(额定400A),同时查看该间隔断路器位置信号为“合闸”,保护装置无动作告警。经研判为负荷过载,立即通过系统向现场终端下发遥控分闸指令,确认返校无误后执行;随后遥调邻近线路无功补偿装置,10分钟内将区域电压稳定在合格范围。整个过程未派出现场人员,记录完整留痕。这,就是“四遥”在真实工作中的样子。没有戏剧化桥段,只有数据、判断与规程。

一.何为“四遥”?

“四遥”指通过通信通道,实现对远方厂站的四类核心功能:

  • 遥测(YC):采集模拟量(电压、电流、功率、温度等)
  • 遥信(YX):监视开关量状态(断路器分合、保护动作、告警信号等)
  • 遥控(YK):执行离散控制命令(分/合闸等)
  • 遥调(YT):调节连续参数(发电机出力、变压器档位、无功设定值等)

二.详细介绍

遥测:数据要“真”,更要“稳”

实现路径互感器/传感器 → 变送器(4~20mA) → RTU模数转换 → 按规约(如IEC 104)上传

关键细节

  • 精度等级需匹配场景(关口点用0.2S级,监测点可用0.5级)
  • 温漂、电磁干扰是常见误差源。某站曾因屏蔽线破损,导致雨天电流数据跳变±15A
  • 工程中常做“遥测系数校核”:现场加标准源,比对主站显示值

实用提示遥测死区设置需合理(如电流变化<1%不上传),避免通道拥塞


遥信:状态判断容不得“眨眼”

采集逻辑无源接点 → 光耦隔离 → CPU判别 → 软件防抖(通常设20~50ms)

血泪教训去年某站遥信频繁变位,排查发现是断路器辅助触点氧化导致接触不良。紧固端子+调整防抖时间至30ms后稳定。

切记遥信“抖动”≠设备故障,先查接线与参数,再下结论

行业实践重要信号(如保护跳闸)常采用双位置遥信(合位+分位接点),提升判别可靠性


遥控:安全是唯一底线

强制流程选择 → 返校 → 执行(缺一不可)

  • “返校”环节:终端收到命令后回传确认帧,主站比对无误方可执行
  • 操作前必须确认“远方/就地”把手置于“远方”位(现场易疏忽点!)

规程红线

  • 遥控操作需双人监护、电子操作票留痕
  • 操作日志保存≥180天(《安规》明确要求)

真实案例某次遥控失败,日志显示“返校超时”。现场检查发现通信模块光纤接口积灰,清洁后恢复——小问题可能卡住关键操作


遥调:精细活,讲究“度”

典型应用

  • 调整SVG无功输出(如从+3Mvar设为+6Mvar)
  • 远方调节主变有载调压档位

技术要点

  • 下发设定值 → 终端转换为模拟量输出(如4~20mA) → 驱动执行机构
  • 需闭环验证:下发后比对遥测反馈值,防止超调或失效

区别遥控遥控是“开/关”动作,遥调是“调至某值”的连续过程,对精度与反馈要求更高


三.协同实战:一次负荷过载处置复盘

时间:2025年7月18日 14:25现象:110kV城西站10kVⅡ段母线#7出线电流达418A(该出线额定400A),持续15分钟处置流程

  • 遥测
    调取该段母线及各出线实时电流曲线,确认非瞬时波动
  • 遥信
    核查所有出线开关位置、保护装置无告警,排除故障跳闸可能
  • 遥控
    经调度令,远程分闸负荷较重的#7出线(用户侧已沟通)
  • 遥调
    同步将站内SVG无功输出由+4Mvar调整至+7Mvar,将母线电压稳定在合格范围结果:10分钟内母线总电流回落至360A,电压稳定在10.3~10.6kV区间。全程操作记录完整,无现场人员介入。

四.一线经验:这些坑,我们踩过

  • 遥信误报
    优先查端子紧固、防抖参数,再查设备本体
  • 遥控拒动
    三查——查“远方/就地”位置、查通信状态、查终端出口压板
  • 数据跳变
    关注屏蔽接地、电源干扰,雨季前重点巡检二次回路
  • 新趋势
    5G电力切片已在部分配网试点,遥控时延压至30ms内,为自愈系统提供可能,但网络安全防护同步升级

五.附电能质量遥测遥控遥调

测点描述
测点类型
测点单位
A相电压
YC
V
B相电压
YC
V
C相电压
YC
V
A相电流
YC
A
B相电流
YC
A
C相电流
YC
A
AB线电压
YC
V
BC线电压
YC
V
CA线电压
YC
V
有功功率
YC
kW
A相有功功率
YC
kW
B相有功功率
YC
kW
C相有功功率
YC
kW
无功功率
YC
kVar
A相无功功率
YC
kVar
B相无功功率
YC
kVar
C相无功功率
YC
kVar
视在功率
YC
kVa
A相视在功率
YC
kVa
C相视在功率
YC
kVa
电网频率(Hz)
YC
Hz
电压零序不平衡度
YC
电压负序不平衡度
YC
计算电流零序不平衡度
YC
电流负序不平衡度
YC
UA电压偏差
YC
UB电压偏差
YC
UC电压偏差
YC
频率偏差
YC
A相基波功率因数
YC
B相基波功率因数
YC
C相基波功率因数
YC
合相基波功率因数
YC
测量零序电流
YC
B相全波视在功率
YC
A相基波电流
YC
B相基波电流
YC
C相基波电流
YC
A相基波相电压
YC
B相基波相电压
YC
C相基波相电压
YC
UAB线电压偏差
YC
UBC线电压偏差
YC
UCA线电压偏差
YC
A相基波有功功率
YC
B相基波有功功率
YC
C相基波有功功率
YC
总基波有功功率
YC
A相基波无功功率
YC
B相基波无功功率
YC
C相基波无功功率
YC
总基波无功功率
YC
A相基波视在功率
YC
B相基波视在功率
YC
C相基波视在功率
YC
总基波视在功率RMS
YC
A相电压总畸变率
YC
B相电压总畸变率
YC
C相电压总畸变率
YC
A相电流总畸变率
YC
B相电流总畸变率
YC
C相电流总畸变率
YC
A相电流奇次总畸变率
YC
B相电流奇次总畸变率
YC
C相电流奇次总畸变率
YC
A相电流偶次总畸变率
YC
B相电流偶次总畸变率
YC
C相电流偶次总畸变率
YC
线电压基波有效值
YC
线电压基波有效值
YC
线电压基波有效值
YC
分合闸
YK
复归
YK
断路器位置
YX
远方本地
YX
备用
YX
外部联跳
YX
电压负序不平衡告警
YX
电压零序不平衡告警
YX
电流负序不平衡告警
YX
电流零序不平衡告警
YX
UA谐波告警
YX
UB谐波告警
YX
UC谐波告警
YX
IA谐波告警
YX
IB谐波告警
YX
IC谐波告警
YX
UA间谐波告警
YX
UB间谐波告警
YX
UC间谐波告警
YX
IA间谐波告警
YX
IB间谐波告警
YX
IC间谐波告警
YX
UA电压上偏差告警
YX
UB电压上偏差告警
YX
UC电压上偏差告警
YX
UA电压下偏差告警
YX
UB电压下偏差告警
YX
UC电压下偏差告警
YX
通信状态
YX

作者:一线电力自动化工程师,参与过省地县三级调度系统建设与运维。说明:文中案例均经脱敏处理,技术依据参考DL/T 5002、IEC 60870-5-101/104等标准。:本文仅作技术交流。

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  1. CONNECT:[ UseTime:0.000374s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000639s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000313s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000310s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000629s ]
  6. SELECT * FROM `set` [ RunTime:0.007907s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000843s ]
  8. SELECT * FROM `article` WHERE `id` = 481160 LIMIT 1 [ RunTime:0.000515s ]
  9. UPDATE `article` SET `lasttime` = 1777378420 WHERE `id` = 481160 [ RunTime:0.003798s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000715s ]
  11. SELECT * FROM `article` WHERE `id` < 481160 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000577s ]
  12. SELECT * FROM `article` WHERE `id` > 481160 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007852s ]
  13. SELECT * FROM `article` WHERE `id` < 481160 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.026514s ]
  14. SELECT * FROM `article` WHERE `id` < 481160 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003458s ]
  15. SELECT * FROM `article` WHERE `id` < 481160 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000876s ]
0.129690s