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　　151X1235DB15SA01 Other names:

　　Editable controller 151X1235DB15SA01

　　151X1235DB15SA01 Input and output unit

　　Excitation control unit system 151X1235DB15SA01

　　Dual Control (Power Bridge Warm Backup)

　　The EX2100e regulator system offers a warm backup (WBU) configuration that includes dual exciter control I/O and protection. The control consists of M1 (Master One) and M2 (Master Two) with two IGBT bridges that can accept separate or shared AC input power. The control configuration can also share a common DC output circuit to the exciter field through a transfer module. M1 and M2 are independent controllers, each with automatic and manual regulator functions. Either M1 or M2 can control bridge firing, as determined by the operator. In the WBU configuration, M1 controls bridge #1 and M2 controls bridge #2.

　　To handle the application software, two independent Universal Controller Standalone Board Version B (UCSB) controllers with separate PCMs and output selector modules (SCM or TCM) provide DC output current for the exciter field (or SCT control winding).

　　The active power bridge receives gating commands from the active control (M1 or M2) and supports the full field voltage and current requirements of the exciter field when the gating circuit of the standby power bridge is inhibited. The operator has full control over selecting which of the dual power bridges is active or inactive. Bidirectional bumpless transfer between the active and inactive bridges is standard. The active master can also self-diagnose faults or missed operations and activate the standby control and power bridges without operator intervention.

　　Control Cabinet

　　The EX2100e regulator system is enclosed in a NEMA® 1/IP20 or IP21 freestanding indoor metal cabinet for floor mounting. An IP54 cabinet option is also available. The standard color of the cabinet exterior is ANSI-70 (light gray) (other colors available). The interior is galvanized steel. The equipment is designed to operate in an ambient temperature range of 0 to 40°C (32 to 104 °F). Depending on the specific application, current derating factors may apply at 50°C (122 °F).

　　Power Conversion Module

　　The Power Conversion Module (PCM) consists of an integrated IGBT inverter module that contains six IGBTs connected in a three-phase inverter configuration. Two of the six IGBTs are used to create a PWM DC output for excitation. The third IGBT is used to discharge the DC link capacitor into an external DD resistor to prevent overvoltage.

　　The input power can be rectified AC, DC from the station battery, or both. In dual redundant applications, there is a primary control and PCM (M1) and a backup control and PCM (M2) that are identical. The transfer module evaluates the health of the primary and backup controls and selects which control is active to provide maximum reliability and availability.

　　Control Software

　　The 151X1235DB15SA01 EX2100e control software supports high performance and helps customers and field engineers understand, install, commission, adjust and maintain the excitation control system. The exciter software is configured and loaded from the ToolboxST application and resides in the controller. The software is represented on the ToolboxST component editor screen by control blocks, which are interconnected to show the signal flow.

　　The generator voltage and current from the PTs and CTs are the source of the control signals required for the automatic (generator terminal voltage) regulator, most limiters and protection functions. They are connected to the ESYS, which acts as a signal conditioner to isolate and scale the signal. The conditioned signal is fed to the controller. The system simultaneously samples the AC waveform at high speed and uses advanced mathematical algorithms to digitally generate the required variables.

　　The output of the software sensor system includes the following:

　　Generator voltage

　　Generator active current (phase average in watts)

　　Generator reactive current (phase average in reactive power, VARs)

　　Generator frequency (current)

　　Slip (signal indicating rotor speed change)

　　The sensor system uses the output to calculate the following:

　　• Generator power and VARs

　　• Generator flux (V/Hz)

　　• Phase angle and power factor

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