The document discusses transient stability in power systems. It defines transient stability as synchronous generators and motors remaining in synchronism with one another during disturbances measured in milliseconds. Factors that can cause instability are discussed, such as faults, loss of excitation, or sudden load changes. Effects of instability include power swings, protective device misoperation, equipment damage, and blackouts. Solutions to stability problems presented are improving system design, selecting equipment to increase stability, and using power system stabilizers and protection schemes.
�The sample calculations shown here illustrate steps involved in calculating the relay settings for generator protection.
�Other methodologies and techniques may be applied to calculate relay settings based on specific applications.
Excitation System & capability curve of synchronous generatorMANOJ KUMAR MAHARANA
Excitation systems perform control and protective functions essential to the satisfactory performance of the power system.
The amount of continuous reactive power a generator can supply is restricted by various limits. In the over-excitation region limits are imposed by rotor heating or amount of field current and second is the stator current. In the under excitation region the limits are imposed by load angle. So in steady state the generator should always operate within this region and the loci of the various limiters are called the capability curve of the generator.
�The sample calculations shown here illustrate steps involved in calculating the relay settings for generator protection.
�Other methodologies and techniques may be applied to calculate relay settings based on specific applications.
Excitation System & capability curve of synchronous generatorMANOJ KUMAR MAHARANA
Excitation systems perform control and protective functions essential to the satisfactory performance of the power system.
The amount of continuous reactive power a generator can supply is restricted by various limits. In the over-excitation region limits are imposed by rotor heating or amount of field current and second is the stator current. In the under excitation region the limits are imposed by load angle. So in steady state the generator should always operate within this region and the loci of the various limiters are called the capability curve of the generator.
Advantages of Soft Start Motor ControlDesign World
Soft starters for AC motors offer many benefits, with the most significant being a reduction of mechanical stresses on the motor and shaft as well as other components in a system, thereby extending equipment life. They also contribute to smarter use of power and less inrush current, which can minimize penalties from utility companies. An industry expert from Eaton explains these and other benefits of soft starters as well as some of the advantages of soft starters over traditional motor starters.
Viewers will also learn about:
• How to monitor and protect your equipment and reduce overall system costs
• How to select soft starters for unique applications
• Reducing or eliminating water hammer effect and check valve slamming
• Considerations for heavy-duty applications
Further, specific attention will be given how to select soft start controllers for unique application requirements.
Developments In Precision Positioning Stages with High Speed RangeDesign World
High-precision linear stages used for applications such as surface measurement in life sciences, semiconductor manufacturing and other industries often require two distinctly different modes of motion. A rapid mode usually is needed to change locations quickly in the workspace, which might then be followed by very slow motion for finer focusing and resolution.
The traditional option for achieving dual-speed motion has been to stack one stage atop another. But a promising new development controls dual-speed motion with a single-stage configuration.
Watch this webinar to learn:
–About both types of linear positioning system configurations
–How to determine the extent to which they satisfy design requirements for velocity, range of motion and compactness
Active Balancer Presentation for ID fan.pdfssuser325d67
The presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator interface), Workstations, Control station (controller), Communication protocols / Buses (server & interface), Chassis / Cabinet and Software for configuration as applicableThe presentation should cover automation technology, architecture with detail regarding Hardware Consoles (Operator inte
How to Start your Large Motors- typical Solutions or new motor design?Delcho Penkov
In the context of low oil prices and an increasing demand for cost reduction of the electrical installations, optimizing the starting solution of high power electrical motors could be highly contributive. Direct on-line start is the most common solution today, being also the simplest and most cost-effective but it may generate voltage dip during start and stresses mechanically the machine and load. Progressive starting solutions, as auto-transformer, soft-starter or variable speed drive, solve the electrical and mechanical constraints in variable levels, related to their complexity. Today, in addition to the progressive starting solutions, motor manufacturers propose to design the motors as to reduce their inrush current, in some cases down to 300% of the rated current.
In this tutorial different solutions for large motor starting will be explored and compared, with respect to their application field, flexibility of adaptation, complexity during installation and set-up, overall performances and technical and economical aspects. Some guidelines for selection will be also discussed. In the scope of analyses are traditional methods, such as direct on-line, auto-transformer, soft-starter and variable speed drive and also recent solutions as motors designed with reduced inrush current.
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One of the top cities of India, Hyderabad is the capital of Telangana and home to some of the biggest companies. But the other aspect of the city is a huge chunk of population that is even deprived of the food and shelter. There are many people in Hyderabad that are not having access to
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Ang Chong Yi Navigating Singaporean Flavors: A Journey from Cultural Heritage...Ang Chong Yi
In the heart of Singapore, where tradition meets modernity, He embarks on a culinary adventure that transcends borders. His mission? Ang Chong Yi Exploring the Cultural Heritage and Identity in Singaporean Cuisine. To explore the rich tapestry of flavours that define Singaporean cuisine while embracing innovative plant-based approaches. Join us as we follow his footsteps through bustling markets, hidden hawker stalls, and vibrant street corners.
