GE IS200ERDDH1A Excitation Regulator Dynamic Discharge Board
Functional Characteristics:
Gate Drive Control: Manages the gate drive control mechanism for field excitation to ensure proper regulation of field current within the system.
DC Bus Voltage Control: Regulates excessively high DC bus voltage through dynamic discharge to prevent overvoltage from affecting system stability.
Feedback and Monitoring: Equipped with a bridge feedback system, it can monitor key parameters such as DC bus voltage, output shunt current, output field voltage, bridge temperature, and IGBT gate drive status, maintaining optimal performance and preventing adverse situations.
Operating Modes:
Simplex Mode: Controls the K3 charging relay, and the module is installed in the ERBP backplane in this case.
Redundant Mode: Controls the K41 de-excitation relay, requiring the use of two ERDD modules. One of them is installed in the same position as in simplex mode, and the other board is installed in the ERRB backplane.
Technical Parameters:
Operating Temperature: -30℃ to 65℃.
Dimensions: Single-slot double-height (6U) form factor.
Connectors: Integrates P1 and P2 backplane connectors, with seven connectors on the surface for connection to the interface board.
Power Supply: The non-isolated control circuit directly obtains power from the Excitation Power Supply Module (EPSM) input through P1 and P2 backplane connectors. The IGBT gate power supply also comes from the EPSM input. The dynamic discharge function is powered by the EPSM input and a dedicated redundant power supply inside the ERDD, which is directly derived from the DC bus.
Application Cases:
Application Case in Thermal Power Plants: When a certain thermal power plant was put into operation in 2010, the on-site auxiliary control adopted GE’s PLC system, which might include the IS200ERDDH1A module. The module is connected to the switch through an Ethernet module and then to the BOP system via optical fiber, realizing unattended or less-attended operation of the peripheral system, ensuring the stable operation of the generator excitation system, and providing support for the automatic control and efficient operation of the thermal power plant.
Application Case in Hydropower Plants: The IS200ERDDH1A module can be applied in the 延寿技术改造 project of 1-4# hydro-generator sets and related equipment of Minxian Liujialang Hydropower Co., Ltd. The module can monitor the excitation status of the hydropower plant generator, control the DC bus voltage through dynamic discharge, ensure the stable operation of the unit after the transformation, and improve power generation efficiency.
Application Case in Nuclear Power Plants: GE Hitachi Nuclear Energy (GEH) once produced replacement part samples for nuclear power plants. The IS200ERDDH1A module can be used in such nuclear power plant-related equipment. In Unit 2 of the Browns Ferry Nuclear Power Plant in Athens, Alabama, operated by the Tennessee Valley Authority, the module can precisely control the excitation system to ensure the safe and stable operation of the unit, providing guarantee for the reliable power supply of the nuclear power plant.
Application Case in Gas Turbine Power Plants: GE’s HA-class gas turbines have the advantages of large output, high efficiency, and cleanliness. The IS200ERDDH1A module can be equipped in HA-class gas turbine generator sets to adjust the excitation system of the gas turbine generator. The module can monitor and adjust relevant parameters in real-time according to the operating status of the gas turbine, ensuring that the gas turbine can generate electricity stably under different loads and giving full play to its peak-shaving performance advantages.
Reviews
There are no reviews yet.