IS200EHPAG1D - Exciter Gate Pulse Amplifier Board

SPECIFICATIONS

Part Number: IS200EHPAG1D
Manufacturer: General Electric
Series: EX2100
Function: Exciter Gate Pulse Amplifier Board
Operating temperature: -30 to 65 degrees Celsius
Power Supply Input, 125 V dc
Feedbacks to control: 3 cond sensors, 1 ALARM, 1 Temp/FAULT(VCO)
Repair: 3-5 Days
Availability: In-Stock
Manual: GEH-6721
Country of Manufacture: United States (USA)

Functional Description

IS200EHPAG1D is an exciter gate pulse amplifier board developed by GE. It is a part of EX2100 control system. It is designed to interface with the ESEL and manage the gate firing of up to six SCRs (Silicon Controlled Rectifiers) on the power bridge. The board plays a pivotal role in regulating the excitation process. One of the primary responsibilities of the board is to receive gate commands from the ESEL and translate them into precise control signals for the SCRs. By managing the timing and duration of these signals, ensures accurate and efficient excitation, contributing to the stability and performance of the overall system.

Features

• Feedback Interface: In addition to gate firing control, the board acts as an interface for current conduction feedback. This functionality allows it to monitor the flow of current through the SCRs in real-time. By providing feedback on current levels, the board enables the excitation control system to make timely adjustments to maintain optimal operating conditions.
• Environmental Monitoring: Another important aspect of the board is its ability to monitor bridge airflow and temperature. By continuously assessing these environmental factors, the board helps safeguard the integrity of the power bridge and prevents potential issues related to overheating or insufficient airflow.
• Integration with EX2100 Excitation Control System: As part of the larger EX2100 Excitation Control system, the board seamlessly integrates with other components and subsystems. Its functionality contributes to the overall reliability and performance of the control system, ensuring smooth operation and effective management of power generation processes.

Gate Command Inputs

• Communication Medium: Gate commands are transmitted from the ESEL to the board via a specialized communication medium comprising a twisted pair, multiconductor, shielded cable. This cable configuration helps mitigate interference and noise, ensuring the integrity of the transmitted signals over long distances.
• Signal Processing: Upon receiving the gate commands, the board undergoes a series of signal processing stages to prepare the signals for amplification and transmission to the respective SCR gates. Initially, the signals are optically coupled to provide isolation and protection against electrical noise and ground potential differences.
• Filtering and Coupling: Subsequently, the signals undergo filtering and AC coupling to eliminate unwanted noise and voltage offsets, ensuring that only the essential gate command information is retained. This filtering process helps maintain signal integrity and stability, crucial for accurate SCR control.
• Gate Pulse Amplification: The filtered and coupled signals are then directed to the Gate Pulse Amplifier (GPA), where they undergo amplification to achieve the necessary drive levels required for gate triggering. The board features six independent GPAs, each dedicated to amplifying the gate command signals for an individual SCR.
• Galvanic Isolation: A key feature provided by the board is galvanic isolation between individual SCR gates. This isolation ensures that each SCR operates independently of the others, preventing cross-talk and interference between gate signals. By maintaining isolation, the board enhances system reliability and stability.

The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200EHPAG1D?
It is an exciter gate pulse amplifier board developed by GE under the EX2100 series.

How does the board receive gate commands from the ESEL?
Gate commands are transmitted via a specialized communication setup comprising a twisted pair, multiconductor, shielded cable. This cable configuration ensures reliable transmission and minimizes interference.

What signal processing stages does the board undergo upon receiving gate commands?
Upon receiving gate commands, the signals are optically coupled, filtered, and AC coupled to eliminate noise and voltage offsets, ensuring signal integrity.

How does the board amplify gate command signals for the SCRs?
It features six independent Gate Pulse Amplifiers (GPAs), each dedicated to amplifying gate command signals for an individual SCR. These signals are amplified to achieve the necessary drive levels for gate triggering.

Why is galvanic isolation provided between individual SCR gates?
Galvanic isolation ensures that each SCR operates independently, preventing cross-talk and interference between gate signals. This enhances system reliability and stability.