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The 9907-175 is a high-precision analog load sharing control module developed by Woodward for synchronized power generation and prime mover control systems. This module is widely used in parallel generator...
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The 9907-175 is a high-precision analog load sharing control module developed by Woodward for synchronized power generation and prime mover control systems. This module is widely used in parallel generator applications to ensure balanced real-power distribution across multiple generator sets operating on a shared electrical bus.
The 9907-175 interfaces directly with electronic speed governors to regulate engine speed based on load demand. By continuously monitoring generator real power output, the module adjusts prime mover speed bias signals to maintain stable load sharing. This prevents conditions such as generator motoring or overload stress on individual units.
Designed for mission-critical power infrastructure, the module supports both diesel and gas engine-driven generator systems. Its analog control architecture delivers deterministic real-time response for legacy and modern power plants where synchronization stability and frequency control are essential.
| Item | Specification |
|---|---|
| Part Number | 9907-175 |
| Control Type | Analog proportional load sharing |
| Output Signal | Voltage bias signal for governor interface |
| Power Input | 24 Vdc (isolated / non-isolated variants available) |
| Parallel Operation | Supports multiple generators on common load-sharing bus |
| Adjustment Controls | External potentiometers for Gain, Stability, Load Balance |
| Dimensions | 27.4 cm × 21.3 cm × 6.0 cm |
| Weight | 1.36 kg |
The 9907-175 is commonly used in:
Emergency standby power systems
Marine propulsion generator control
Data center backup power synchronization
Oil & gas offshore platform power systems
Islanded microgrid power networks
It is especially critical in facilities requiring stable 50/60 Hz frequency regulation under dynamic load conditions.
Can the 9907-175 be used with non-Woodward governors?
Yes. The module provides flexible voltage bias outputs compatible with most major electronic governor brands, provided input impedance and signal range requirements are matched.
How does the module handle Droop vs Isochronous load sharing?
The module is primarily designed for Isochronous load sharing using load-sharing lines to maintain constant frequency. However, it can also support Droop mode configurations for grid-connected or utility-scale power systems.
