The benefits of using ADF Power Tuning on a ship or rig are many. From less hassle when retrofitting equipment, doubled mean time between failures, lower running cost, to reduced capital expenditures.
It’s no secret that ships operate on weak grids with large dynamic loads. Common power quality problems are reactive power, imbalances, flicker, and harmonics that can cause power failures and damage sensitive equipment.
A unique challenge for the marine industry is meeting the class requirements that define strict rules regarding harmonics. This is complicated by the increased use of variable frequency drives (VFD), which are commonly used to conserve energy, but, as a side effect, enhance harmonics. In the past, the common solution has been to compensate large loads individually through the use of AFE drives or phase-shifting transformers, but these solutions are unnecessarily heavy and complicated.
Advantages for you
Seamlessly meeting standards
It is extremely important to meet regulatory standards in the marine industry. ADF not only meets today’s standards, it goes beyond that. At the same time, it is the most compact solution on the market.
Take advantage of standard six-pulse drives
An advantage of ADF Power Tuning is that it can be applied to the main bus bar. Because of this, all loads in the systems can use standard six-pulse drives. This means that several drives can be filtered at a single point. There is no longer a need for different types of front end units, depending on the size of the drive.
Standard six-pulse drives are less expensive and easier to source and service—not to mention reliable. Combined with a flexible filtering solution, the modular structure of ADF Power Tuning also enables great redundancy. By using multiple modules and the multi-master functionality, ADF Power Tuning will automatically maintain significant compensation, even if one power module fails.
Simplify your THD mitigation by using a single module type
By applying a stack of filter modules on the main bus bar, we eliminate the need for THD (total harmonic distortion) compensation on individual drives. Additionally, the modular central filtering units keep the harmonics on the bus bar within class requirements. This saves footprint, weight and energy. And the filter modules are all uniform in size, making it easy to service and keep spares.
All of these features combine to create a system that is not only easy to maintain, but saves time, space, and hassle—all valuable elements aboard your ship.
Double the MTBF of large drive functions on your ship
By choosing the right harmonic mitigation solution you can double the “Mean Time between Failures” (MTBF) of your large drives.
Unlike AFE, ADF Power Tuning is connected in parallel (in shunt) with the drive on the bus bar, making drive function completely unaffected even in the face of a filter failure. So should ADF experience a failure, your vessel will still function smoothly, as expected. By using ADF Power Tuning, you can expect your MTBF to double.
Save fuel by choosing the right power quality solution
A typical MPSV (multi-purpose supply vessel) consumes about 4,500 – 7,000 tons of fuel per year. The efficiency of typical diesel electric propulsion indicates that about 5% in losses occur through the active front end (AFE) drives or multi-pulse drives.
If ADF Power Tuning is applied, the losses of energy (compared to AFE) are 30%-40% lower. And of course, with reduced energy demands comes decreased fuel consumption. With ADF Power Tuning, simply choosing the right solution for a class requirement is a financial success.
Minimize hassle when retrofitting drive equipment
A common problem when installing drives on an existing vessel is the increase in harmonics on the ship’s grid. This can be especially disruptive because the grid is often not sized for such changes in electrical loads. Additionally, there is often a space constraint, making it challenging to fit the drives, including the harmonic mitigation.
The common solution to this issue has been to use AFE drives or multi-pulse transformers for large loads. But there is a better solution. ADF Power Tuning has been used in multiple retrofits for ships. The advantage of this solution is that the filter is decoupled from the drives, making it possible to be placed anywhere. This greatly simplifies installation and provides flexibility in decision-making and space-utilization.
To learn more about ADF Power Tuning for your industry, contact us.