ABB COG variable speed drive system

ABB COG variable speed drive system

The variable speed drive system components are selected  and engineered to ensure optimum operation, meeting the  requirements of the application and complying with international standards for electrical equipment.  Power supply, mechanical interface, control interface,  cooling, enclosure protection class, building constraints,  cable terminations, transport lots and ambient conditions  are site dependent and are taken into consideration by  project engineering. All system components are routine tested according to  international standards. When required, acceptance tests  can be performed in ABB’s well equipped testing facilities.

Reliability and availability is a must

ABB ensures the highest reliability by implementing standards  and procedures of quality in design and production conforming  to ISO 9001. Tests are performed at various stages during  the manufacturing process in addition to the final tests before  delivery. Redundancy of wearing components (eg cooling  pumps) can be provided to increase availability while enabling  maintenance intervals to be extended.

Full drive package responsibility

A single source offering consolidated and coordinated work  from design to production, testing, delivery and commissioning  gives the following advantages to ABB’s customers: 

− Minimized risk and reduced commissioning time 

− Optimization of the complete drive system with all associated auxiliaries  

− System design supported by a professional engineering  team and sophisticated IT tools 

− Integrated manufacturing and delivery schedules of the  complete drive system 

− Verification of the functionality, as well as the load performance of the drive system 

− Fully integrated documentation

Higher efficiency and less emissions

Energy saving has never been higher on the agenda than  today. People have become increasingly aware of the correlation between wasting energy and environmental damage and  acknowledge the benefits of conserving energy by technical  means. By employing variable speed drives instead of throttling  or using by-pass vanes, the energy bill can be reduced by  as much as 60 percent. ABB electric drives reduce NOx  and CO2 emissions on site that could delay granting of a  permit and cause penalties.

The power required to run a pump or a compressor is roughly  proportional to the cube of the speed. In other words, a pump  or compressor running at half speed can consume as little  as one eighth of the energy compared to one running at full  speed. A small reduction in speed can make a big difference  in the energy consumption. As many pump and compressor  systems often run at partial load, the use of a variable speed  drive can produce huge savings.

Improved control and flexibility of processes

Outputs of oil and gas fields can vary greatly in their compounds, density, volume flow rates and pressure levels. This  imposes varying operating conditions on process equipment,  which means that compressors and pumps, which must  exhibit a high degree of flexibility, cannot always be operated  at their optimum design point. The employment of variable  speed drives offers the possibility to control the process  simply and effectively by speed control and to run equipment at its optimum operating points.

Minimized environmental impact

Variable speed control is the most eco-efficient way to optimize  process performance. Variable speed drives reduce energy  consumption and NOx  and CO2  emissions. Furthermore, ABB’s  electric drives are designed using state-of-the-art DFE (Design  for Environment) guidelines covering the complete product life  cycle. This entails a long-term commitment to waste reduction  and to reuse and recycle components.

Benefits of variable speed drives

·High performance and reliability increases plant availability  and decreases maintenance costs

·Smooth torque over the entire speed range reduces noise  and vibration levels, which minimizes mechanical stress

·Better efficiency, particularly at partial load results in lower  energy costs

·No inrush currents and voltage drops during starting

·Regeneration of rotating power and braking capability

·Improved speed control and process optimization

·Enhanced operating flexibility to suit the process needs

·Lower impact on piping/valve system results in longer equipment  life and less maintenance

·Better dynamic performance during starting and during supply  grid turbulences

·No on-site emissions