Variable-Frequency Control System for Offshore Work Vessels
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Product Introduction:
The variable-frequency control system for offshore operation vessels is a highly complex, highly integrated, intelligent electro-hydraulic system. Its key features can be summarized as follows: leveraging a diesel–electric common power grid as the platform, employing networked integrated control as the nervous system, and relying on high-reliability redundant design for assurance; utilizing vector control and advanced algorithms to achieve precise torque, speed, and position control; and ultimately meeting the stringent demands for operational efficiency, safety, and energy conservation and environmental protection under a wide range of harsh operating conditions.
Model: RE-PSV-CS/RE-AHTS-CS
Electrical Specifications:
Input voltage: AC 380 V to 690 V, 3-phase, +6% to -10%, 50 to 60 Hz, ±5%
Compatible motor power: 100–4,000 kW
Output voltage: 0~AC 380V–690V, 3P
Output frequency: 0–300 Hz
Control Method: Vector Control (SVC)
Working Conditions and Protection:
Ambient temperature: 0~45°C
Relative humidity: ≤90%
Pitch and Roll: 15° of transverse inclination, 22.5° of transverse roll, 5° of longitudinal inclination, and 7.5° of longitudinal roll.
Protection rating: Cabin IP44, Control station IP23
Certification and Standards:
Design and manufacturing standards: Comply with the IEC 60092 series of standards.
Class Society Certification: The product design complies with the standards of leading class societies, including CCS, ABS, DNV, LR, BV, RINA, NK, and KR. Product certificates from the relevant class societies can be applied for based on customer requirements.
Product Features:
1. Diesel-electric propulsion and the public power grid:
2. Extremely high reliability and redundant design:
3. Robust Networking and Integrated Control:
4. Precise control performance and advanced algorithms:
5. Outstanding energy management and feedback capabilities:
6. Adaptation to Harsh Marine Environments:
Application scope: platform supply vessels, multi-purpose workboats, floating cranes, dredgers, pipe-laying vessels, semi-submersible vessels, and more.
Case Study: Wenzhou Haobo Harbor Construction Engineering Co., Ltd. – 4,000 DWT Full-Revolution Crane Winch Variable-Frequency Control System
Main parameters: Input voltage: AC 690 V, 3P, 60 Hz
Main hook winch motors: 400 kW, 8 units
Auxiliary hook winch motors: 400 kW, 4 units
Boom hoist motors: 400 kW, 4 units
Rotary motors: 160 kW, 8 units
Tool winch motors: 110 kW, 2 units
Rigging winch motors: 110 kW, 2 units
Ambient temperature: -15~45℃
Relative humidity: ≤90%
Pitch and Roll: 15° of transverse inclination, 22.5° of transverse roll, 5° of longitudinal inclination, and 7.5° of longitudinal roll.
Protection rating: IP44
Classification Society: CCS
The crane vessel’s hoisting winch, luffing winch, and slewing mechanism all employ variable-frequency control. Leveraging robust networked and integrated control, precise control performance, and advanced algorithms, the entire lifting system boasts exceptionally high reliability and a redundant design.
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