LX660-8077-T281/L8R003 GE Digital excitation controller

GE LX660-8077-T281/L8R003 Overview

The GE LX660-8077-T281/L8R003 is an advanced digital Excitation Controller belonging to GE's excitation system product line, typically used for synchronous generators (e.g., in power plants).

Product Detailed Description

• Function:

• Controls the excitation current of synchronous generators to regulate their terminal voltage.

• Maintains stable voltage in response to system load changes and disturbances.

• Provides reactive power control and power factor regulation.

• Integrates protection functions to prevent faults in the excitation system and generator.

• Supports various communication interfaces for easy integration with plant control systems.

• Typically includes functions such as Automatic Voltage Regulator (AVR), Power System Stabilizer (PSS), and Excitation Limiters.

• Features:

• Microprocessor-based digital control technology for high accuracy and reliability.

• Advanced control algorithms providing excellent dynamic performance.

• User-friendly operator interface and configuration tools.

• Modular design for easy maintenance and expansion.

• Powerful fault recording and diagnostic capabilities.

Product Parameters

Due to the specific model number, detailed parameters may require consulting the official GE product manual. Here are some common parameters for typical digital excitation controllers:

• Input Voltage:

• Signals from generator terminal voltage and current transformers.

• Command signals from the plant control system.

• Output Voltage:

• DC voltage supplied to the generator field winding (specific range depends on the excitation system type).

• Output Current:

• DC current supplied to the generator field winding (specific range depends on the excitation system type and generator capacity).

• Control Accuracy:

• Typically features very high voltage regulation accuracy (e.g., +/- 0.5% of rated voltage or better).

• Response Time:

• Fast response to system disturbances.

• Communication Interfaces:

• Industrial communication protocols such as Modbus, Ethernet, Profibus, etc.

• Power Supply:

• Typically requires an external DC power supply.

• Ambient Temperature:

• Operating temperature range typically from -20 °C to +70 °C (depending on the model).

• Protection Functions:

• Overexcitation Limiter (OEL), Underexcitation Limiter (UEL), overcurrent protection, overvoltage protection, etc.

Product Advantages

• Precise Voltage Control:

• Advanced digital control and algorithms ensure accurate and stable generator terminal voltage.

• Improved System Stability:

• Integrated Power System Stabilizer (PSS) helps to damp power system oscillations and improve overall stability.

• Optimized Performance:

• Ability to regulate reactive power and power factor according to system requirements, optimizing power plant operating efficiency.

• Enhanced Reliability:

• Robust hardware design and comprehensive protection functions ensure reliable operation of the excitation system.

• Easy Integration and Maintenance:

• Standard communication interfaces and user-friendly tools simplify system integration and maintenance tasks.

• Advanced Diagnostic Capabilities:

• Detailed fault recording and diagnostic functions help in quickly identifying and resolving issues.

Precautions

• Correct Installation:

• Must be installed by qualified electrical engineers according to GE's installation manual.

• Parameter Tuning:

• Accurate parameter tuning based on the specific generator and power system characteristics is required to ensure optimal performance and stability.

• Regular Maintenance:

• Regular inspection and maintenance, including cleaning, checking connections, and functional testing, should be performed according to GE's recommendations.

• Safe Operation:

• Always adhere to relevant electrical safety regulations when operating and maintaining the excitation system.

• Grounding:

• Ensure reliable grounding of the excitation controller and related equipment.

Product Applications

• Thermal Power Plants:

• Controlling the excitation systems of steam turbine generators of various capacities.

• Hydropower Plants:

• Controlling the excitation systems of hydro turbine generators.

• Gas Turbine Power Plants:

• Controlling the excitation systems of gas turbine generators.

• Industrial and Marine Applications:

• Used in industrial and marine power systems requiring synchronous generators.

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