Current regulation plays an important role in modern power electronic AC conversion systems. The most direct strategy to regulate such currents is use a simple closed loop proportional-integral (PI) regulator, which has no theoretical stability limits as the proportional and integral gains are increased, since it only second order system. However, pulsewidth modulation (PWM) transport controller sampling delays limit gain values that can be achieved practical Taking these limitations into...

Despite its inherently modular hardware structure, the control system of most cascaded H-bridge converters is usually highly centralized and relies on a high-bandwidth intraconverter communication to transmit time critical signals module controllers. In contrast, this paper presents decentralized strategy for converter, where each controller determines own switching actions based local sensors, current regulator, modulator. The achieves same performance as an optimized while only requiring...

Power hardware-in-the-loop (PHIL) is an attractive, real-time system testing and validation technique. Virtual models can be replaced with physical equipment to emulate integration testing, perform model without the cost risk of a full scale power system. amplifiers are principal components that facilitate interface between virtual systems. This necessary interfacing introduces dynamics do not exist in real source stability accuracy issues affecting PHIL applications. paper presents analysis...

Environmentally friendly power sources such as photovoltaic solar cells, small scale wind turbines and fuel cells are particularly suitable for distributed generation systems, but typically produce a relatively low magnitude DC voltage output that can vary significantly operating conditions change. Hence electronic inverter is required to condition this into more conventional constant AC supply voltage. Such an should be light weight, cost, efficient, provide galvanic isolation between the...

Current regulation plays a key role in modern power electronic AC conversion systems. The most obvious strategy is to use simple closed loop PI regulator. However it well known that this approach cannot achieve zero steady state error because of the instability inevitably occurs as gains are increased reduce error. Linear analysis identifies an load controlled by regulator second order system with no theoretical stability limits increased. Hence other factors must be responsible for gain...

Despite its inherently modular hardware structure, the control system of most cascaded H-bridge converters is usually highly centralized, and relies on a high bandwidth intra-converter communication to transmit time critical signals module controllers. In contrast, this paper presents decentralized strategy for converter, where each controller determines own switching actions based local sensors, current regulator modulator. The achieves same performance as centralized system, with low...

Power Hardware-in-the-Loop (PHIL) is a real-time system testing and validation technique particularly attractive for large scale power systems. The key challenge achieving transparent interface between the simulation physical Item-under- Test (IuT), Signal exchange systems defined by algorithm (IA), amplifier required to amplify digital signals. Ideal Transformer Model (ITM) Damping Impedance (DIM) are two most commonly used IAs, switched mode converters likely candidate in high...

Current regulation is an essential element of modern power electronic AC conversion systems. However it well known that simple stationary frame PI current regulators cannot achieve zero steady state error for systems because the instability inevitably occurs as gains are increased in attempt to reduce this error. Recent work has shown single phase fact limited by second order effects sampling and transport delays, rather than any fundamental theoretical constraints. This paper extends...

Auxiliary power supplies for traction rolling stock are used to the carriage service facilities and control systems that essential keep a train operational. The design of converters such applications is quite challenging, since environment requires high performance can manage range harsh environmental electrical requirements without compromising performance, reliability robustness. This paper presents controller 20 kW auxiliary converter boosts nominal 110 V DC battery supply regulated 600...

Most UAVs (unmanned aerial vehicles) today use the GPS (Global Positioning System) for navigation. While is an accurate and usually reliable aid to navigation, it can be unavailable various reasons. The aim of this project develop alternative navigation method, which used when transmissions are not available. method suggested here called feature based It works by comparing current image taken on-board camera with previous reference images, most recent, obtained was system then compares...

Power hardware-in-the-loop (PHIL) is an attractive real-time test and validation technique for large power systems. It can be used instead of full simulation or experimental systems to reduce cost risk, improve testing flexibility. A key challenge achieving a interface with as much transparency possible via algorithms, amplifiers, measurement control strategies. Voltage source converters (VSCs) are suitable amplifier option high applications due their relative efficiency, but they restrict...

Power hardware-in-the-loop (PHIL) is an attractive real-time test and validation technique for large power systems. It can be used instead of full simulation or experimental systems to reduce cost risk, improve testing flexibility. A key challenge achieving a interface with as much transparency possible; via algorithms, amplifiers, measurement control strategies. Voltage source converters (VSCs) are suitable amplifier option high applications due their efficiency, but they restrict the...

Phase shifted DC-DC converters are a well established topology for producing an isolated DC output supply. However, the conventional with LC filter has some practical difficulties when issues such as diode reverse recovery effects, voltage ratings wide ranging input voltages, and common mode EMI caused by switched transformer considered. In many applications, these can be mitigated moving inductor to AC side before bridge rectifier. this leads alternative constraints of increased series drop...

Naval platforms are complex systems with stringent reliability and performance requirements, which often undergo extensive upgrade re-fit throughout life. Hence, a wide range of, complex, technical activities conducted platform life to maintain high level of design assurance. This paper explores the use real-time simulation as tool in support these activities. With realtime interactivity this technique can provide an analogue physical system for such as: development testing operating...