Excitation control unit system 151X1207DC13SA21

151X1207DC13SA21 EX2100e excitation control regulator system is GE’s latest advanced control system for steam, gas or hydroelectric generators, suitable for new units and modified units. Control hardware and software design are closely coordinated with GE’s system and control engineering to ensure a true system solution. Integration between the excitation control system, turbine control system, static start control system, integrated control system (ICS) an

d human machine interface (HMI) is seamless. For stand-alone retrofit applications, integration with the customer’s distributed control system (DCS) is supported via serial or Modbus® Ethernet. This document is specifically for the application of the 35 A and 120 A (nominal) series EX2100e control regulator systems.

• Customer DCS via Ethernet or Modbus Ethernet Remote Terminal Unit (RTU)

• ToolboxST* application

• GE Field Support* for monitoring and diagnostics

　　Digital controllers (IGBT-based systems)

The 151X1207DC13SA21 EX2100e excitation controller provides a regulator control system in an 800 mm (32 in) enclosure with supporting hardware depending on the specific application. Other packaging options are available. The regulator system can be purchased as part of a finished cabinet or the individual components can be shipped separately for field installation to better meet the needs of retrofit applications.

The power conversion consists of the input section, DC link, and converter output section. The input section is a three-phase diode bridge with input filter. The system accepts a primary AC input range of 90 to 280 V rms nominal for 35 A systems and up to 480 V rms for 120 A systems. The AC input is 480 Hz (maximum) and can be supplied in single or three phase from a permanent magnet generator (PMG), auxiliary bus, or generator terminals.

As a backup power source, the system accepts a secondary power input (nominal 125 to 250 V DC) from a DC battery bank. The DC secondary inputs are diode isolated and combined with the three-phase diode bridge outputs. These power the DC link, which is an unregulated supply voltage that controls the output power through IGBTs. A dynamic discharge (DD) circuit limits the DC link voltage level during events such as load rejection or unit tripping.

Key Electrical Performance

Power supply voltage: 12–30VDC (standard 24VDC), filtered direct current power supply

Signal output: 4–20mA; 4mA = no flame, 20mA = full-strength flame

Response time: <25ms (0.025s), rapid flame extinction protection

Load impedance: Maximum 750Ω for 4–20mA loop

Power consumption: Normal operation <3W

Reuter-Stokes Cross Reference Matrix