IS200IGPAG2A - Gate Drive Power Supply

SPECIFICATIONS

Part Number: IS200IGPAG2A
Manufacturer: General Electric
Series: EX2100
Product type: Gate Drive Power Supply
LEDs: DS1-DS8
Fuses: FU1, FU2
Input Fuses: 6A and 7 A
Current Limit: 18 A dc
Soft Start: 200 milliseconds
Availability: in Stock
Country of Manufacture: United States (USA)

Functional Description

IS200IGPAG2A is a gate drive power supply developed by GE. It is a part of EX2100 excitation system. The output of the SCR bridge circuit is phase controlled, which results in excitation control. Digital regulators in the controller generate the SCR firing signals. In the redundant control option either M1 or M2 can be the active master control, while C monitors both to determine which should be active and which should be standby. To ensure a smooth transfer to the standby controller, dual independent firing circuits and automatic tracking are used. The Gate Driver Power Supply board provides the necessary gate driver power required by each Integrated Gate Commutated Thyristor (IGCT). The IGPA board is directly attached to the IGCT. Each IGCT has one IGPA board. IGPA boards are divided into two categories.Each Group 1 board is equipped with two power supplies. Group 2 boards have a single power supply.

Features

• The component contains two pairs of two LEDs. These are on the board's opposite sides, facing outward. Each pair contains one amber and one green LED.
• Except for these LEDs, several terminal connectors, and a single vertical 9-pin male header connector, the right side of the board is essentially empty. The remainder of the right side of the board is marked with outlines for the placement of other components, but they do not appear on the board.
• There is only one inductor coil. Several heat sink components are arranged in two lines on the board. Four electrolytic capacitors are located in two pairs on the board.
• A 9-pin vertical male header connector, several terminal connectors drilled through the surface of the board, and two LED indicators placed side by side on the board edge are among the few components found on this side. These LEDs are mirrored by two other LEDs on the opposite side of the board. Each LED pair contains one green and one amber LED.

System Control HMI

The System Control HMI (Human-Machine Interface) plays a crucial role in the overall control and monitoring of the exciter system, particularly in turbine generator sets that incorporate Mark VI turbine controls. Let's explore the attributes and functionality of the System Control HMI:

• Platform and Software: The HMI operates on a Windows NT-based platform. It utilizes CIMPLICITY operator display software, which provides a user-friendly interface for controlling and monitoring the exciter system. The software allows operators to interact with the system through graphical displays, providing intuitive access to real-time data, alarms, and control commands.
• Data Highway Communication: The HMI employs data highway communication drivers to facilitate seamless data exchange and communication between the exciter system and the HMI. This enables the HMI to receive and display real-time data from the exciter, as well as transmit control commands to the system.
• Operator Display and Control: The CIMPLICITY operator display software on the HMI offers a comprehensive range of features to operators. They can initiate various commands, such as starting or stopping the exciter system, adjusting parameters, and configuring settings. Additionally, the HMI provides graphical displays that allow operators to visualize the system's status, performance, and alarms in real-time.
• Server and Viewer Configuration: The HMI can be set up as either a server or a viewer. As a server, it acts as the central hub for collecting data from the exciter system and distributing it to multiple viewers or client devices. Viewers, on the other hand, can access the HMI's displays and data remotely, providing operators with flexible access to the system's information and controls.
• Tools and Utility Programs: The HMI may include additional tools and utility programs to enhance functionality and ease of use. These tools can assist operators in performing tasks such as system diagnostics, data analysis, configuration management, and system maintenance. They provide valuable support for operators in optimizing the performance and reliability of the exciter system.
• Unit Data Highway (UDH) Connectivity: The exciter system is connected to the HMI or HMI/Data Server via the Unit Data Highway (UDH). The UDH utilizes a 10BaseT Ethernet network, which enables high-speed and reliable communication between the exciter system and the HMI. To ensure the integrity and stability of the network, separately powered network switches are employed. In cases where longer cable runs are required, fiber-optic cables can be utilized for extended reach and improved signal integrity.

System Control Power Supplies

• The Exciter Power Distribution Module supplies power to the controls. A 125 V dc source and one or two 115 V ac sources supply this. The alternating current source is routed through an ac/dc converter.
• The 125 V dc output is diode coupled with the other dc sources to form a dc bus that powers the control modules and gate pulse amplifier boards. Fused EPDM outputs supply power to the EGPA boards, EXTB, and Exciter Power Backplane. Each output features an LED indicator as well as an on/off isolation switch. The EPDM is installed on the Exciter Power Supply rack's left side.

Product Attributes

• Input Power (to external isolation transformer): Operates with an input power of 50V AC, which is supplied through an external isolation transformer. This input voltage is crucial for the proper operation of the board and provides the necessary power to its components.
• Power Dissipation: The estimated power dissipation of the board is 10 W. This indicates the amount of power that is converted into heat during operation. It is important to consider this value to ensure proper cooling and to maintain the board's temperature within acceptable limits.
• Airflow Requirements: Requires a minimum airflow of 80 Linear Feet per Minute (LFPM) to function correctly. Adequate airflow helps dissipate heat and prevent overheating, ensuring optimal performance and longevity of the board.
• Switching Frequency: Operates at a switching frequency of 95 KHz. This frequency refers to the rate at which the board's components switch on and off. It is a crucial parameter for achieving the desired output characteristics and overall performance of the board.
• Common Mode Current: Designed to handle a common mode current of 1=c 6 KVs, where 'c' represents the capacitance of the isolation transformer. This attribute is important for maintaining proper electrical isolation and minimizing noise and interference in the system.
• Control Method: Utilizes a current mode with an outer voltage loop control method. This control scheme allows for precise regulation of current while maintaining stability and responsiveness in the voltage loop. It enables accurate control of the board's output characteristics.
• Output Voltage: Provides a regulated output voltage of 5 V DC with a tolerance of ±10.25%. This voltage is essential for powering other components or devices connected to the board. The regulated output ensures a stable and reliable power supply.
• Output Current: Deliver a steady-state output current of 15 A DC. This attribute determines the maximum continuous current that the board can provide to connected devices or systems.
• Energy Storage (Regulating): Features a minimum energy storage time of 1.0 milliseconds. This attribute represents the duration for which the board can maintain regulation and stability in response to fluctuations or disturbances in the input or load conditions. Adequate energy storage ensures consistent and reliable performance.

Exciter Software

• The exciter software, which resides in the controllers, is configured and loaded from the toolbox. On the toolbox screen, the software is represented by control blocks that are linked together to show the signal flow.
• The generator field, as well as stator currents and voltages, are measured and fed into the control system. The ac regulator is selected in normal operation.
• The PT and CT generator voltages and currents are wired to the EPCT board, which acts as a signal conditioner to isolate and scale the signals. The controller is then fed the conditioned signals.
• These signals are used by software conversion algorithms to calculate system variables for use by the regulator, limiter, and protection functions.
• The following are the results of these software calculations:
  • The magnitude of the generator voltage and frequency are derived from the PTs.
  • The magnitude of the generator current as determined by the CTs
  • Power from a generator, P
  • Reactive volt amperes (VARs) of the generator, Q
  • Rotor speed change calculated from the integral of accelerating power, which is normally fed into the optional Power System Stabilizer (PSS)
  • Generator active and reactive currents
  • Generator flux magnitude (VHz)
  • Line voltage derived from PTs
  • Line frequency derived from PTs on the line
  • Generator and line phase angle correlation derived from generator and line PTs

System Features

The EX2100 can communicate over an Ethernet local area network (LAN) to:

• The Ethernet Global Data (EGD) protocol is used by the Mark VI, Mark VI ICS, HMI, PI Historian, OSM, COI, and VersaMaxTM extended I/O modules.
• Ethernet or RS-232C Modbus RTU customer DCS
• Toolbox for the GE Control System (toolbox)
• The GE OnSite Support SM for remote monitoring and diagnostics includes a powerful diagnostic system and a control simulator to facilitate rapid installation, control constant tuning, and training.

WOC is happy to assist you with any of your automation requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.

FREQUENTLY ASKED QUESTIONS

What is IS200IGPAG2A?
It is a gate drive power supply developed by GE

What is the purpose of the heat sink components on the board?
The purpose of the heat sink components on the board is to dissipate heat generated by the circuitry on the board.

What is the purpose of the 9-pin male header connector on the board?
It is used for connecting the board to other devices or components.