Thermal performance analysis and optimization design of dry type air core reactor with the double rain cover

Yuan, Fan; Yang, Shouwei; Qin, Shihong; Lv, Kai; Tang, Bo; Han, Shanshan

doi:10.2298/tsci201014067y

Cited by 8 publications

(5 citation statements)

References 18 publications

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“…The electromagnetic losses of coils in the dry-type air-core reactor are the heat sources of the temperature field analysis. These losses consist of resistance losses (P R ) and eddy current losses (P E ) [11]. The formula for calculating resistance losses [21] in the reactor is shown in Equation (1).…”

Section: Basic Theorymentioning

confidence: 99%

“…With regards to the FEM, there are two ways of predicting temperature fields based on dry-type air-core reactors. One method involves calculating heat convection using a convection coefficient [9,10], but the calculation accuracy depends on the convection heat transfer coefficient, which limits its actual application [11]. Another approach entails constructing a fluid-thermal coupled FEM model to compute the temperature distributions within the air-core reactor without requiring a convection coefficient.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve the thermal efficiency and realize the safe operation of the reactor, different methods are proposed to optimize the structure parameters of it. An optimization method based on the orthogonal experiment design and the FEM is proposed in [11] in order to reduce the temperature rise in a dry-type air-core reactor with the rain cover, in which a fluid-thermal coupled model is established according to the design parameters of the reactor so that the specific temperature distribution can be attained. A thermal load optimization technique based on the heat dissipation characteristics of the encapsulations of the air-core reactor is introduced in [18] to enhance metal conductor utilization, whereby a fluid-thermal coupled FEM model is built to obtain detailed temperature field distribution results.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal Simulation and Analysis of Dry-Type Air-Core Reactors Based on Multi-Physics Coupling

Wu,

Chang,

Zhang

et al. 2023

Energies

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A reactor is an important piece of equipment used for reactive power compensation in power system and has a significant impact on the safe operation of power system. Thermal behavior is one of the main causes of reactor failures. For an accurate analysis of the thermal behavior of reactors, electromagnetic–thermal–fluid multi-physics coupling modeling is chosen. However, there is a huge difference in size between the overall structure of the reactor and its insulating material, which makes it difficult to perform mesh generation, resulting in dense mesh and significantly increased solution degrees of freedom, thus making the solution of the reactor’s multi-physics field model very time-consuming. To address this, this paper proposes a simplified processing method to accelerate the solution calculation of the reactor’s multi-physics model. This method calculates the equivalent turns of each encapsulate with parallel coils in the reactor, simplifying the encapsulate into a single-layer coil, thereby greatly reducing the division and solution degrees of freedom of the multi-physics model, and thus accelerating the simulation calculation. Taking a BKDCKL-20000/35 dry-type air-core shunt reactor as an example, the outer diameter of the coil is nearly 12,000 times bigger than the coil insulation, which is a huge size difference. Both refined models and simplified models are established. Compared to the simulation results of the detailed model, the simplified model demonstrates good accuracy; the maximum relative error of temperature is just 2.19%. Meanwhile, the computational time of the simplified model is reduced by 35.7%, which shows promising effectiveness and significant potential for applying the optimization design and operation prediction of dry-type air-core shunt reactors for enhanced thermal performance.

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Section: Basic Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Simulation and Analysis of Dry-Type Air-Core Reactors Based on Multi-Physics Coupling

Wu,

Chang,

Zhang

et al. 2023

Energies

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“…In order to accurately calculate the temperature rise of transformer, it is necessary to accurately calculate the loss of transformer. The loss of transformer mainly includes core loss and winding loss [20].…”

Section: Calculation Of Loss and Heat Sourcementioning

confidence: 99%

Heat dissipation performance analysis and structural parameter optimization of oil-immersed transformer based on flow-thermal coupling finite element method

et al. 2022

Self Cite

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In this paper, a coupled flow-thermal field simulation model is established based on the parameters of the transformer. Then the distribution of the flow and thermal fields are obtained. The results show that oil backflow occurs to varying degrees at the top and bottom of the transformer. In addition, with the formation of backflow, the hot spot temperature of the transformer increases. Through the combination of orthogonal experiments and finite element method, the geometric structure of winding oil passage is selected as the optimization variable. The law between the winding structure and the maximum temperature is acquired by means of range and variance analysis, and the optimal parameters are obtained. The hot spot temperature is reduced by 34.27 K compared to the pre-optimization period, which is a guideline for the design of transformers.

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“…In Ref. [9], the influence of rain cover on the temperature rise of the reactor is considered, the temperature rise distribution of the reactor is achieved. On this basis, in Refs.…”

Section: Introductionmentioning

confidence: 99%

Structure Parameters Optimization of the Rain Cover and Ventilation Duct of Dry Air Core Reactor under the Forced Air Cooling Condition

Liu

Yuan

Zhou

et al. 2022

IEEJ Transactions Elec Engng

Self Cite

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In this paper, the three-dimensional fluid field-temperature field coupled model of air core reactor is established, the detailed temperature field distributions of reactor can be obtained, and the reason about the temperature rise of reactor is significant increased when adding the rain cover is given by analyzing the flow velocity of fluid in the air ducts. Considering the natural air cooling no longer meets the temperature rise requirement of the reactor, the forced air cooling is performed by installing ventilation duct and fan at the bottom of the reactor, combined with the finite element method and central composite experimental design method (CCD), the influence of structure parameters of rain cover and ventilation duct on the temperature rise of reactor are analyzed, meanwhile, the response surface model is established, which reflects the relationship between the temperature of reactor and the structure parameter of rain cover and ventilation duct, and the optimal design parameters can be obtained based on the quantum genetic algorithm, the maximum temperature of the reactor is only 59.3 • C, the difference between the prediction of response surface and simulation result is only 0.1 • C, and the correctness of the optimization method is validated, which provides an important guiding significance for the safe and stable operation of reactor in the system.

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Thermal performance analysis and optimization design of dry type air core reactor with the double rain cover

Cited by 8 publications

References 18 publications

Thermal Simulation and Analysis of Dry-Type Air-Core Reactors Based on Multi-Physics Coupling

Thermal Simulation and Analysis of Dry-Type Air-Core Reactors Based on Multi-Physics Coupling

Heat dissipation performance analysis and structural parameter optimization of oil-immersed transformer based on flow-thermal coupling finite element method

Structure Parameters Optimization of the Rain Cover and Ventilation Duct of Dry Air Core Reactor under the Forced Air Cooling Condition

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