描述
GE EX2100是GE公司第三代数字式励磁系统，专为大型发电机组设计，适用于汽轮发电机、燃气轮机和水轮发电机。以下是其核心功能、技术特点及应用的综合解析：
一、系统概述
技术定位
-第三代数字励磁系统，结合高可靠性、灵活性与智能化控制，支持百万级机组（如1000MW）。
-采用模块化设计，可扩展至复合源励磁系统，兼容电势源与电流源输入。
硬件架构
-四桥并联设计：适用于1000MW机组，单桥出力可达3000A，N+1冗余配置确保强励工况下的稳定性。
-控制模块：调节屏（AVR）、可控硅整流屏（SCR）、灭磁及过电压保护装置、起励装置等组成完整系统。
二、核心硬件技术
三重冗余控制器
-M1、M2为主控制器，C通道负责监控与故障切换，实现无扰动切换（Bumpless Transfer）。
-采用VME总线通信，支持高速数据交互与表决机制。
可控硅整流桥
-4英寸大功率整流管，强迫风冷设计，支持在线更换风机与故障元件。
-整流桥加装五极开关，实现交直流侧明显断开点，便于检修。
灭磁系统
-线性灭磁电阻与灭磁开关协同工作，最大开断容量100KA，适用于机端短路等极端工况。
-双霍尔效应传感器冗余保护，快速接入灭磁电阻。
三、软件与控制功能
调节器功能
-自动电压调节器（AVR）：支持PSS（电力系统稳定器）、低励限制（UEL）、过励限制（OEL）等功能。
-手动控制：提供MW/MVAR设定、励磁电流/电压显示及调节器平衡诊断。
远程与本地接口
-COI触摸屏：光纤连接AVR，支持图形化参数整定与故障报警显示。
-DCS接口：通过Modbus或以太网协议与远方控制系统通信。
动态数据分析
-内置发电机模型，支持频率响应分析（如AVR、PSS特性测试），无需额外试验设备。
GE EX2100 is GE’s third-generation digital excitation system,designed for large generator sets,suitable for steam turbine generators,gas turbines and hydro-generators.The following is a comprehensive analysis of its core functions,technical features and applications:
I.System Overview
Technical Positioning
-The third-generation digital excitation system combines high reliability,flexibility and intelligent control to support million-level units(such as 1000MW).
-It adopts a modular design and can be expanded to a composite source excitation system,compatible with potential source and current source input.
Hardware Architecture
-Four-bridge parallel design:suitable for 1000MW units,single bridge output can reach 3000A,N+1 redundant configuration ensures stability under strong excitation conditions.
-Control module:adjustment panel(AVR),thyristor rectifier panel(SCR),demagnetization and overvoltage protection device,excitation device,etc.form a complete system.
II.Core Hardware Technology
Triple Redundant Controller
-M1 and M2 are the main controllers,and the C channel is responsible for monitoring and fault switching to achieve bumpless transfer.
-Adopt VME bus communication,support high-speed data interaction and voting mechanism.
Thyristor rectifier bridge
-4-inch high-power rectifier tube,forced air cooling design,support online replacement of fans and faulty components.
-A five-pole switch is installed on the rectifier bridge to achieve obvious disconnection points on the AC and DC sides for easy maintenance.
Demagnetization system
-Linear demagnetization resistors and demagnetization switches work together,with a maximum breaking capacity of 100KA,suitable for extreme working conditions such as machine-end short circuit.
-Dual Hall effect sensor redundant protection,fast access to demagnetization resistors.
III.Software and control functions
Regulator function
-Automatic voltage regulator(AVR):supports PSS(power system stabilizer),underexcitation limit(UEL),overexcitation limit(OEL)and other functions.
-Manual control:provides MW/MVAR setting,excitation current/voltage display and regulator balance diagnosis.
Remote and local interface
-COI touch screen:optical fiber connects AVR,supports graphical parameter setting and fault alarm display.
-DCS interface:communicate with remote control systems via Modbus or Ethernet protocols.
Dynamic data analysis
-Built-in generator model,supports frequency response analysis(such as AVR,PSS characteristic test),without the need for additional test equipment.
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