Optimal design of a medium voltage high frequency transformer with a high isolation voltage 115kv michael jaritz, jurgen biela. The power transformer is one of the most important equipment in a power system. Presentation of a n algorithm to optimal design of high. Abstract pulsed power systems often use a pulse transformerto generate high voltage pulses. Optimal design of mediumfrequency transformers for solid. A survey of current research reveals the continued interest in application of advanced techniques for transformer design optimization. Apr 04, 2014 issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Analysis and design of power electronic transformer based. The resulting new power transformer with higher efficiency for bidirectional dcdc converter for electrical vehicle charging system is implemented in a practical design. Improved fast evolutionary ifep for program for optimum.
However, the ever growing and extensive range of standard format. With the fastpaced changing technologies in the power industry, new references addressing new technologies are coming to the market. Analysis of high frequency effects like skin and proximity losses in the transformer windings is presented in this paper. Optimal design of the power transformer with ansys maxwell. A power law to model insulation thickness is combined with standard analysis of proximityeffect losses to.
The effect of those design parameters on the transformers performance is supported by some papers related to. It is possible to reduce leakage because high voltage and low voltage winding can be subdivided by using sandwich coil. Power versus sample size for a given effect, effect size versus sample size for a given desired power, with many other options. Three 1phase transformer requires each bank isolated. The trend toward high power density, high operating frequency, and low profile in power converters has exposed a number of limitations in the use of conventional wirewound magnetic component structures. Index termsdecision trees, optimum design, power transformers. Design of three phase transformer shital patel, ee department design of dc machines and transformer 2160912 3. Optimal design of transformer involves determination of design parameters of a power transformer when a chosen.
In this paper, a power transformer design methodology using multiobjective evolutionary optimization is proposed. The input to the program includes detail like distance between core centre c, thickness of core t, width of window bw, height of windowhw, connection, frequency etc besides the specification values. Even a short power transformer outage may cost millions of dollars in lost revenues. It is used for core type distribution transformer and small power transformer for moderate and low voltages and shell type transformers. Optimal design for resonant power transformer chenyao liu, jhaocyuan huang, dingoa huang, nsrrc, hsinchu, taiwan abstract the energy and dc to dc conversion of the resonant transformer are required to achieve optimal design and working condition of the resonant region frequency. Optimal design of a dc reset circuit for pulse transformers. Optimal design of a high power high frequency transformer free download as pdf file. Pdf optimal design of singlephase shelltype distribution. Inclusive of highfrequency effects william gerard hurley, senior member, ieee, werner hugo wol. This study proposes a new design of power electronic distribution transformer pet by using an intelligent program to get an optimum hf operation, which leads to maximum efficiency.
The paper presents power transformer design, using genetic algorithm ga and simulated annealing sa by minimizing total active cost, keeping in view the constraints imposed by international standards and power transformer specifications. Optimal design of the power transformer with ansys maxwell for bidirectional battery charger dr. In this paper, a power transformer design methodology using. Pdf optimal design of the power transformer with ansys. In orderto improvethe utilization of the transformer core material usually a dc reset circuit is applied whichresults in asmallertransformervolume. Dixon section 1 figure 11 transformer equivalent circuit introduction experienced switchmode power supply design ers know that smps success or failure depends heavily on the proper design and implementation of the magnetic components.
Optimal design software the optimal design for multilevel and longitudinal research is a free standalone software program for performing statistical power calculations of impact evaluation studies, particularly grouprandomized trials. An optimal design methodology has been developed based on the revealed relationship. In addition, design considerations for core and wire selections, isolation requirements, and different transformer structures are investigated. Fem based preliminary design optimization in case of. Easily share your publications and get them in front of issuus. The voltage pulse results in a change of flux density jb which can be maximal 2bsat with bsatbreset for a system. Costoptimal design of a 3phase core type transformer by.
Optimal design methodology for llc resonant converter. Power transformer modelling for optimal performance. Cost optimal design of a singlephase dry power transformer raju basak 265 exposed area of the coil 0. Optimal design and tradeoff analysis of planar transformer in high power dcdc converters abstract. Optimal design of power transformer research papers. Asystemwithout dcreset circuit is limited to bsatbrem i. So, their optimal designing are of great importance. Optimal design of subtransmission transformer this paper deals with the design optimization of subtransmission power transformers as well as the distribution transformers since subtransmission is regarded as high voltage distribution in many unified systems. Optimal design of transformer involves determination of design parameters of a power transformer when a chosen objective is optimized, simultaneously satisfying a set of constraints. As a result, the proposed transformer design methodology accounts for leakage inductance requirements for optimal power. Ashot melkonyan siemens ag, munich, germany summary the leakage inductance of power transformers, windings loss estimation and design optimisation is accomplished using of ansys maxwell software. The design methodology for reaching costoptimality has been discussed in details by authors like ramamoorty. View optimal design of power transformer research papers on academia. Optimal design of the power transformer with ansys.
Optimal design of power transformer using genetic algorithm abstract. Optimization of power transformer design 195 generated by the transition mechanism. Evaluation of topologies and optimal design of a hybrid distribution transformer j. Optimal design of mhz llc converter for 48v bus converter. When circular coils are required for distribution and power transformers, the square and stepped cores are used. The reliability and efficiency of the transformer has a major impact on the total cost of transmission over a long period of time. The two windings of the transformer are called high voltage winding and low voltage winding. Optimal design of a high power high frequency transformer. Optimal design of a furnace transformer by intelligent. Optimization of power transformer design using simulated. Due to market globalization, power transformer manufacturers are facing an increasingly competitive environment that mandates the adoption of design strategies yielding better performance at lower costs. This minimization, however, has to take into consideration constraints that are imposed by international specifications and customers needs.
Abstract switching circuits, operating at high frequencies, have led to considerable reductions in the size of magnetic components and power supplies. The pet provides a fundamentally different and more complete approach in transformer design by using power. In 1959, williams, abetti, and mason restricted involving different mathematical optimization explained complete design of power transformers with a large. Abstracttransformer design is primarily determined by minimizing the overall manufacturing cost, including the cost of materials and the labor cost. Chenyao liu, jhaocyuan huang, dingoa huang, nsrrc, hsinchu, taiwan. Section 4 power transformer design power transformer design this section covers the design of power transformers used in buckderived topologies. Antoniazzi in mainssupplied electronic systems the ac input votlage must be converted ni to a dc voltage wthi the right value and degree of stabilization.
Methodology for the optimum design of power transformers. William gerard hurley, senior member, ieee, werner hugo wol. As previously stated, the design opt imization is broadly targetted. One of the design challenges of the highdensity power converter design is to have highdensity magnetic components which are usually the most bulky parts in a converter. Cost optimization by three evolutionary intelligent techniques viz. Laboratory for high power electronic systems, eth zurich, physikstrasse 3, ch8092 zurich, switzerland email. Optimal design of power transformer using genetic algorithm. Design of three phase transformer shital patel, ee department design of dc machines and transformer 2160912 6 distribution transformer is designed for less iron loss compared to power transformer i. The skeletons of the transformer are wound and connected using conductors to make three 1phase or one 3phase transformer. Inclusion of core loss selection of operating flux density to optimize total loss multiple winding design. Optimal design of mhz llc converter for 48v bus converter application yinsongcai. Figures 1 and 2 show the simplest rectifier circuits. A transformer consists of two windings coupled through a magnetic medium. Optimal design and tradeoff analysis of planar transformer.
Optimum design of cross section of transformer core power. Reference 12, presents a method to construct a high frequency planar transformer model with improved accuracy which is. Optimal design produces a graph that can show a number of comparisons. Designing optimal passive filters for transformers under. Optimal design of a medium voltage high frequency transformer. Due to large variables search space ss, most optimization methods proposed in the literature for ptod are prone to find local minimum instead of the global one. May 12, 2017 power transformer optimal design ptod is a complex multiobjective optimization problem including numerous design variables that aim to design a transformer with minimal material costs. Performance comparison of conventional, genetic algorithm. Half bridge converters are utilized in power supplies in the power range of 150 w. Pdf cost optimal design of a singlephase dry power. Evaluation of topologies and optimal design of a hybrid.
Highlights investigation of optimal design parameters of a furnace transformer for an electric arc furnace. Modernizing their power transformer fleet is a sound investment for power companies. The complexity of transformer design demands reliable and rigorous solution methods. Increasing the switching frequency to shrink the passive component size is the biggest contribution towards increasing power density.
Simulation analysis and comparison of optimal design parameters with those derived by conventional optimization technique. In these basic configurations the peak voltage across the load is equal to the peak value of the ac. Optimal analysis and design of power electronic distribution transformer article pdf available in research journal of applied sciences, engineering and technology 79. Windings are surrounded by the limbs so cooling is batter in core than winding. Magnetics design for switching power supplies lloyd h. Transformers, impedance matching and maximum power transfer. Simulation analysis and comparison of optimal design parameters with those derived by. Dec 23, 2016 optimal design of power transformer using genetic algorithm. The proposed methodology and software constitute a handy tool that is already applied successfully in a transformer manufacturing industry. The design parameters are related to the electrical parameters of the transformer by mathematical models. Power transformers built for reliability and efficiency.
A 1mhz, 1kw llc converter is designed to verify the proposed method. Optimal design of power transformer using simulated. A power transformer is a technology investment that needs to be secured for decades. The chart on the next page shows power on the yaxis and sample size on the x axis.
The skeleton of the power transformer is designed with metal which is laminated by sheets. To meet this requirement, the core loss will be checked first. Pdf optimal analysis and design of power electronic. Many transformer models has been published in the literature for preliminary design optimization of power transformers 10,16. Present paper firstly provides efficient and reliable solution for the design optimization problem with several variables and secondly, it guarantee that the obtained solution is a global optimum. In core type transformer the ratio of depth to width of core varies. Pp 159 168 optimal design of transformer a compressive, author.
Hence, this paper demonstrates a better and efficient solution for power transformer design using the said optimization techniques. Designmethodologyapproach the optimization of the transformer design problem is formulated as an nlp problem, expressing the objective and constraint functions in terms of the selected independent variables. However, bythe use ofa reset circuit additional losses are generated. Design of highdensity transformers for highfrequency high. Summary the leakage inductance of power transformers, windings loss estimation and design optimisation is accomplished using of ansys maxwell software. Pp 159 168 optimal design of transformer a compressive issuu. Optimum design of cross section of transformer core power system analysis free pdf download flux density of a core will be maintained by changing the cross sectional area of the core during its design. Introduction with the development of power conversion technology, power density becomes the major challenge for frontend acdc converters 1 2 3. A new type of transformers based on power electronics pet has been introduced, which realizes voltage transformation, galvanic isolation, and power quality improvements in a single device. In this paper simulated annealing sa is used for optimization of power transformer design.
A contemporary evaluation of switching power design methods with real world applications written by a leading author renowned in his field focuses on switching power supply design, manufacture and debugging switching power supplies have relevance for contemporary applications including mobile phone chargers, laptops and pcs based on the authors successful switching power optimized design 2nd. Optimal design to be offered based on customer input the task is to design a transformer that minimizes the total ownership cost using more materials reduces the losses and the running costs, but on the other hand can increase the manufacturing costs an optimizing software is used to find the lowest total ownership cost. Biela laboratory for high power electronic systems eth zurich, physikstrasse 3, ch8092 zurich, switzerland email. Introduction in recent years, tremendous progresses in the power semiconductor devices bring numerous capabilities to manage the energy conversion in the different parts of the power systems. Abb transformers, 2015 total cost of ownership method basics. Pdf optimal design of a 3phase core type distribution. For shell type transformer the cross section may be rectangular. The risk of failure is therefore, an inevitable cost to be considered when evaluating the total cost of ownership. Power transformer optimal design ptod using an innovative. Transformers, impedance matching and maximum power transfer introduction the transformer is a device that takes ac at one voltage and transforms it into another voltage. Power transformer optimal design ptod is a complex multiobjective optimization problem including numerous design variables that aim to design a transfor due to large variables search space ss, most optimization methods proposed in the literature for ptod are prone to find local minimum instead of the global one. A performanceoriented power transformer design methodology.
Optimal design of power transformer using simulated annealing. Optimal choice for number of strands in a litzwire. Transformer design1 chapter 15 transformer design some more advanced design issues, not considered in previous chapter. Feshki farahani1, 1department of electrical engineering, ashtian branch, islamic azad university, ashtian, iran abstract high frequency transformers are used in different applications such as switching power supply. This topology also uses two major magnetic components, a transformer and an output inductor, but in this case the transformer core is better utilized than in a forward converter.