9907-029 | Woodward | SPM-A Synchronizer

Configured for precision generator paralleling, the Woodward 9907-029 (SPM-A Synchronizer Module) provides direct electrical execution of frequency, phase angle, and voltage matching within turbine and engine control systems.

Hardware Specifications

Actuator Loop Feedback Response and Load Management

The 9907-029 synchronizer governs parallel power generation by providing dynamic bias signals to speed controllers. The module manages actuator loop feedback response through field-adjustable dynamic settings, which must be tuned relative to the inertia of the prime mover; small engines typically require high-response settings, while large-scale gas or steam turbines necessitate damped, slower dynamic parameters. The unit incorporates precise voltage matching capabilities capable of 1% accuracy and maintains a phase angle lock within +/- 10 degrees. The dual-impedance output architecture ensures compatibility with diverse load-sharing interfaces, including high-impedance 2301 and low-impedance 2301A/EPG/2500 control platforms.

Frequently Asked Questions

Q: How should the dynamic settings be adjusted for a large-scale steam turbine application?

A: For large-scale turbomachinery, dynamic response settings must be configured to a slower rate to prevent control loop instability and potential over-correction during synchronization.

Q: Is the 9907-029 compatible with both 115 VAC and 230 VAC bus sensing inputs?

A: Yes. The module is engineered for universal input voltage operation within the 115 to 230 VAC range (with a +/- 10% tolerance), making it suitable for standard utility grid or isolated bus sensing.

Field Installation Guidelines

• Mounting: Install the module in a vibration-shielded control cabinet environment. Ensure all terminal connections are secured to prevent signal drift in the speed bias circuits.
• Wiring: Utilize shielded twisted-pair wiring for all speed bias output signals. Terminate shields at the control system ground to avoid ground loop currents that could affect phase-matching accuracy.
• Interface Selection: Select the appropriate output impedance (high or low) based on the specific load-sharing controller (e.g., 2301 vs. 2301A/EPG) to ensure signal impedance matching.
• Calibration: Perform a bus frequency and phase-matching verification using a reference synchronoscope before initial unit paralleling to ensure the 1% voltage matching capability is calibrated correctly for the application.