Description
Product Overview
The Woodward 9905-001-G is a SPM-A series synchronization module (Revision G) designed for industrial turbine and generator control systems. It serves as a critical component for synchronizing the speed, frequency, and phase of offline turbines/generators with an online system (e.g., utility grid or another generator) before paralleling. As part of Woodward’s SPM-A ecosystem, the 9905-001-G is widely used in industries where turbine/generator reliability and grid compliance are paramount—such as power plants, cogeneration facilities, and marine propulsion systems.
The 9905-001-G’s primary role is to ensure precise synchronization (within strict tolerances for frequency, phase, and voltage) between the offline turbine/generator and the online system, preventing electrical faults (e.g., phase mismatch, frequency deviations) and optimizing power transfer efficiency. Its revision G designation indicates updated firmware/hardware for improved performance and compatibility with modern control systems.
Key Technical Specifications
Insights from industrial supplier listings (e.g., Machinio) and Woodward SPM-A series documentation reveal the following key parameters for the 9905-001-G:
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Input Voltage: 115 VAC RMS or 230 VAC RMS (supports both European and North American power standards).
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Frequency Range: 50 to 60 Hz (compatible with global grid frequencies).
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Phase Angle Matching: ±10° (ensures minimal phase difference between the offline and online systems during synchronization).
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Voltage Matching Capability: Within 1% to 5% (aligns turbine/generator voltage with the online system to prevent overcurrent or undercurrent conditions).
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Output Options:
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High impedance (for 2301 load sharing systems).
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Low impedance (for 2301A, EPG, and 2500 load sharing systems).
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EPG output (for EPG controls without load sharing).
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Power Consumption: ≤10 W (low power design for continuous operation).
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Operating Temperature: -20°C to +70°C (-4°F to +158°F) (suitable for indoor industrial environments; extended temperature range available in LT models).
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Mounting: Panel-mounted (fits standard industrial control cabinets).
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Certifications: CE, UL (compliant with international industrial safety standards).
WOODWARD 9905-001-G
Field Application & Problem Solved
In industrial turbine/generator operations, improper synchronization (e.g., frequency mismatch, phase difference) can lead to:
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Electrical faults (e.g., short circuits, equipment damage).
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Grid penalties (e.g., fines for frequency deviations).
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Downtime (e.g., turbine/generator tripping, process interruptions).
The 9905-001-G addresses these challenges by:
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Precise Frequency Matching: It adjusts the offline turbine/generator’s speed to match the online system’s frequency (50/60 Hz) within ±0.1 Hz, ensuring compliance with grid requirements.
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Phase Alignment: It aligns the turbine/generator’s phase with the online system’s phase (±10° tolerance), preventing phase mismatch faults.
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Automatic Breaker Closure: Once synchronization is achieved, the module sends a contact closure signal to close the circuit breaker, enabling smooth power transfer.
Typical Applications:
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Power Generation: Synchronizing standby turbines/generators to the utility grid during peak demand or outages.
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Cogeneration: Balancing electrical and thermal loads by paralleling turbines/generators with driven equipment (e.g., compressors).
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Marine Propulsion: Synchronizing shipboard turbines/generators for auxiliary power generation.
Installation & Maintenance Pitfalls (Expert Tips)
To ensure optimal performance of the 9905-001-G, follow these best practices:
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Verify Voltage Compatibility:
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Confirm that the input voltage (115/230V AC) matches the module’s rating. Mismatched voltage can damage the internal circuitry—use a multimeter to check the input voltage before installation.
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Check Phase Angle Settings:
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Adjust the phase angle matching range (±10°) according to the application’s requirements. For example, a power plant may require a tighter phase tolerance (±5°) to comply with grid standards.
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Test Synchronization Logic:
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After installation, test the synchronization logic using a signal generator to simulate frequency/phase changes. Verify that the module correctly adjusts the turbine/generator’s speed and sends a breaker closure signal when synchronization is achieved.
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Perform Regular Maintenance:
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Inspect the 9905-001-G annually for signs of wear (e.g., cracked casings, loose connections). Clean the module’s connectors with isopropyl alcohol to remove dirt and debris, which can cause communication failures.
WOODWARD 9905-001-G
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Technical Deep Dive & Overview
The 9905-001-G operates on Woodward’s SPM-A synchronization algorithm, which combines:
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Frequency Measurement: The module measures the online system’s frequency using a phase-locked loop (PLL) circuit.
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Speed Adjustment: It sends a control signal to the turbine/generator’s actuator (e.g., fuel valve) to adjust the speed until it matches the online system’s frequency.
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Phase Matching: Once the frequency is matched, the module aligns the turbine/generator’s phase with the online system’s phase using a phase comparator.
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Breaker Closure: When both frequency and phase are synchronized, the module sends a contact closure signal to close the circuit breaker, enabling parallel operation.
What sets the 9905-001-G apart is its revision G update, which includes:
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Improved firmware for better frequency stability.
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Enhanced compatibility with modern turbines/generators and control systems.
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Reduced power consumption for increased efficiency.
Final Notes
The Woodward 9905-001-G is a critical component for ensuring reliable turbine/generator synchronization in industrial power systems. Its precise frequency/phase matching capabilities and compatibility with global power standards make it an essential tool for maintaining grid compliance and preventing electrical faults.
When installing or maintaining the 9905-001-G, always adhere to Woodward’s guidelines and consult with a certified technician to ensure optimal performance. For more detailed information, refer to Woodward’s official SPM-A Series Synchronizer Manual (Document # SPM-A-OM-001) or contact Woodward’s customer support for application-specific advice.
