A model for calculating losses in transformer related to orders and harmonic amplitude under analysis of joule effect, eddy current and hysteresis
-
Gabriel Santos
,
Bruno W. França
and
Flavio G.R. Martins
Abstract
The electrical transformer is one of the most used equipment in electrical power systems. The non-linear electrical loads are increasing, mainly in the electrical distribution system, and the electrical power transformer is inserted in this scenario, supplying these loads. Consequently, the increasing non-linear loads affect the electrical transformers and their factors directly, like in the dependency between temperature and harmonic increase. Therefore, to study the influence of harmonics in the transformer’s temperature, one should understand how it will behave with these changes in the electrical power system. For this reason, in this article, numeric simulations and tests were performed to predict the transformer temperature behavior. The proposal is a numeric technique for coupling two equations, thermal and electromagnetic, of an electrical transformer, considering heat sources regarding joule, eddy current, and hysteresis effect. To evaluate the numeric simulation and understanding the electrical transformer behavior in real-life, tests with specific harmonic orders (3rd, 5th, and 7th) and their combinations and a test with less than 10% total harmonic distortion, according to IEEE 519 standard were performed. It is verified that the electrical transformer temperature rises with the increase in harmonic amplitude and its orders. Results show that the industry must be aware of the effects of the increasing non-linear loads when designing the next generation of transformers concerning their durability and lifetime.
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Research Articles
- Analysis of arc existence in electrical contact gap for 42 V automotive DC components
- Research on influence of split conductor induced voltage on TRV
- Ultra mega power plant disturbance related oscillation detection in Indian grid using PMU data
- Implementation of medium voltage remote controlled switches to improve quality performance indexes – a case study
- A simplified method for fault detection and identification of mismatch modules and strings in a grid-tied solar photovoltaic system
- A model for calculating losses in transformer related to orders and harmonic amplitude under analysis of joule effect, eddy current and hysteresis
- A new principle of UHVDC line pilot protection based on trigger angle control characteristics
- A phasor-distance based faulty phase detection and fault classification technique for parallel transmission lines
- Study on the insulation characteristics of environmentally friendly CF3I/N2/CO2 mixed gas
- Development of thermal model for estimation of core temperature of batteries
- Analysis of power quality in a grid system connected with a three phase induction motor
- Research on the influencing factors of losses in 10 kV, 1000 kW induction motor
