描述
一、产品概述
型号:LTC391AE01
订货号:HIEE401782R0001
类型:数字式线路保护装置(Line Terminal Protection)
应用场景:
高压/超高压输电线路(110kV及以上电压等级)。
变电站出线端保护。
新能源并网线路保护(如风电、光伏接入)。
工业用户高压进线保护。
二、核心功能
主保护功能
距离保护:精确测量故障距离,快速切除相间短路故障。
纵联差动保护:通过通信通道(如光纤)实现线路两端电流比对,高速切除区内故障。
方向保护:判断故障方向,避免误动于反向故障。
后备保护功能
过流保护:定时限或反时限过流保护,作为距离保护的后备。
零序保护:检测接地故障,适用于中性点直接接地系统。
重合闸功能:自动重合断路器,提高供电可靠性。
辅助功能
故障录波:记录故障前后电气量波形,支持事后分析。
事件记录:存储保护动作、开关变位等事件日志。
通信接口:支持IEC 61850、Modbus等协议,与SCADA系统集成。
三、技术参数
额定参数
额定电压:110kV/220kV/500kV(根据具体型号配置)。
额定电流:1A/5A(二次侧电流互感器输出)。
频率范围:50Hz/60Hz(自适应)。
性能指标
动作时间:
距离保护Ⅰ段:≤15ms(典型值)。
纵联差动保护:≤10ms(全线速动)。
精度:
测量电流/电压误差:≤±0.5%。
距离测量误差:≤±2%(典型场景)。
环境适应性
工作温度:-25°C至+55°C(工业级设计)。
防护等级:IP40(防尘,适合室内安装)。
抗干扰:符合IEC 61000-4标准,适应强电磁环境。
四、硬件设计
模块化结构
插件式设计,支持热插拔,便于维护升级。
核心模块包括:CPU板、电源板、输入输出板、通信板等。
人机界面
前置LCD显示屏,实时显示测量值、保护状态。
按键操作,支持本地参数配置与定值修改。
通信接口
以太网:双端口,支持IEC 61850-9-2(采样值)和GOOSE协议。
串口:RS-485/RS-232,用于调试或连接旧系统。
光纤接口:支持STM-1/STM-4光通信,用于纵联保护通道。

LTC391AE01 HIEE401782R0001
1.Product Overview
Model:LTC391AE01
Order No.:HIEE401782R0001
Type:Digital Line Terminal Protection
Application Scenarios:
High-voltage/ultra-high-voltage transmission lines(110kV and above voltage levels).
Substation outlet protection.
New energy grid-connected line protection(such as wind power and photovoltaic access).
Industrial user high-voltage incoming line protection.
2.Core Functions
Main protection function
Distance protection:Accurately measure the fault distance and quickly remove the phase-to-phase short-circuit fault.
Longitudinal differential protection:Realize the current comparison at both ends of the line through the communication channel(such as optical fiber)and remove the fault in the area at high speed.
Direction protection:Determine the fault direction to avoid misoperation on the reverse fault.
Backup protection function
Overcurrent protection:Time-limited or inverse-time overcurrent protection,as a backup for distance protection.
Zero-sequence protection:Detect ground faults,suitable for neutral point direct grounding systems.
Reclosing function:Automatically reclose the circuit breaker to improve power supply reliability.
Auxiliary functions
Fault recording:record the waveform of electrical quantities before and after the fault,and support post-analysis.
Event recording:store event logs such as protection action and switch position change.
Communication interface:support IEC 61850,Modbus and other protocols,and integrate with SCADA system.
III.Technical parameters
Rated parameters
Rated voltage:110kV/220kV/500kV(configured according to specific model).
Rated current:1A/5A(secondary current transformer output).
Frequency range:50Hz/60Hz(adaptive).
Performance indicators
Action time:
Distance protection stage I:≤15ms(typical value).
Longitudinal differential protection:≤10ms(fast action on the entire line).
Accuracy:
Measurement current/voltage error:≤±0.5%.
Distance measurement error:≤±2%(typical scenario).
Environmental adaptability
Working temperature:-25°C to+55°C(industrial grade design).
Protection level:IP40(dustproof,suitable for indoor installation).
Anti-interference:complies with IEC 61000-4 standard and adapts to strong electromagnetic environment.
IV.Hardware design
Modular structure
Plug-in design,supports hot plugging,and is easy to maintain and upgrade.
Core modules include:CPU board,power board,input and output board,communication board,etc.
Human-machine interface
Front LCD display screen,real-time display of measurement value and protection status.
Key operation,supports local parameter configuration and fixed value modification.
Communication interface
Ethernet:dual port,supports IEC 61850-9-2(sampling value)and GOOSE protocol.
Serial port:RS-485/RS-232,used for debugging or connecting old systems.
Fiber optic interface:supports STM-1/STM-4 optical communication,used for longitudinal protection channel.
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