Dynamic thermal analysis of a power line by simplified RC model networks: Theoretical and experimental analysis

Chatzipanagiotou, P.; Chatziathanasiou, V.

doi:10.1016/j.ijepes.2018.10.009

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…At present, the commonly used conductor for transmission lines are aluminum conductor steel-reinforced (ACSR) [30], which consist of multiple twisted steel core and aluminum layers. In Figure 1, the existing temperature calculation models of overhead transmission lines mostly consider the entire conductor as an isothermal body or only considers the radial heat transfer path of the conductor cross-section, and each radial layer is regarded as an isothermal body [23,24,26,27]. However, different zones of the conductor cross-section are differently influenced by forced convective heat and radiation heat transfer in actual operations as demonstrated in Figure 2.…”

Section: Heat Transfer Analysis Of Overhead Transmission Line Cross-smentioning

confidence: 99%

“…Step 2: Obtain the meteorological parameters around the transmission line and conductor parameters. Then, modify the ETN in real-time by Equations (22) and (23), and calculate the transient temperature rise response. Proceed to Step 3.…”

Section: Test Systemmentioning

confidence: 99%

“…So far, numerous studies have been conducted on conductor transient temperature calculation, which considers the structural characteristics of a conductor with several materials that can affect heat transfer [22][23][24][25][26][27][28]. For example, in [23][24][25], conductor temperature calculation model was established by thermal circuit model on the basis of thermal-electrical analogy theory. Full consideration of heat transfer characteristics of different materials, the model put the analysis of heat transfer process into the solution of electrical circuit to grasp the operation of overhead transmission line conveniently and rapidly.…”

Section: Introductionmentioning

confidence: 99%

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Transient Temperature Calculation and Multi-Parameter Thermal Protection of Overhead Transmission Lines Based on an Equivalent Thermal Network

Xiong

Chen

et al. 2018

Energies

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The overload degree of a transmission line is represented by currents in traditional overload protection, which cannot reflect its safety condition accurately. The sudden rise in transmission line current may lead to cascading tripping under traditional protection during power flow transfer in a power system. Therefore, timely and accurate analysis of the transient temperature rise of overhead transmission lines, revealing their overload endurance capability under the premise of ensuring safety, and coordination with power system controls can effectively eliminate overloading. This paper presents a transient temperature calculation method for overhead transmission lines based on an equivalent thermal network. This method can fully consider the temperature-dependent characteristics with material properties, convective heat resistance, and radiation heat and can accurately calculate the gradient distribution and response of the conductor cross-section temperature. The validity and accuracy of the proposed calculation method are verified by a test platform. In addition, a multi-parameter thermal protection strategy is proposed on the basis of the abovementioned calculation method. The protection can adequately explore the maximum overload capability of the line, and prevent from unnecessary tripping to avoid the expansion of accidents. Finally, the validity of the proposed protection is verified by the modified 29-bus system.

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Section: Heat Transfer Analysis Of Overhead Transmission Line Cross-smentioning

confidence: 99%

Section: Test Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transient Temperature Calculation and Multi-Parameter Thermal Protection of Overhead Transmission Lines Based on an Equivalent Thermal Network

Xiong

Chen

et al. 2018

Energies

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“…Compared with steady-state simulation, the computation burden of transient simulation increases with the number of the time point, which may reach hundreds of times of steady-state simulation. On the other hand, many efforts were made by previous researchers to simplify the thermal model of power electronics using equivalent thermal resistances and capacitances circuit [17]- [19]. Although the simplified equivalent thermal circuit is precise, a large amount of analysis and measurement are needed.…”

Section: Introductionmentioning

confidence: 99%

Electro-Thermal Modeling and Design of High-Current Pulse Power Supply for Electrically Assisted Manufacturing

Han

Wang

2019

IEEE Access

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Electrically assisted manufacturing (EAM) is a promising and rapidly developing metal processing method. The power supply is a key sub-system for EAM, which needs to be designed properly. This paper proposes the model-based design of a low-voltage high-current pulse power supply used for EAM based on converter-level electro-thermal modeling. The thermal stress of key components is obtained by converter-level finite element simulations. A simplified thermal modeling method is proposed to reduce the computation burden of the FEM simulation to obtain the dynamic thermal profile under pulse current operation. The impact of the duration of the current pulse on the maximum temperature and temperature variations of MOSFETs is investigated based on the thermal model. A case study of a 10 V/500 A pulse power supply is presented to demonstrate the theoretical analyses and verification. The outcomes contribute to the design optimization and virtual prototyping of pulse power supplies for EAM applications.INDEX TERMS Electrically assisted manufacturing, electro-thermal modeling, finite element analysis, thermal model, virtual prototyping.

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Non-steady state electro-thermally coupled weather-dependent power flow technique for a geographically-traversed overhead-line capacity improvement

Talpur

Lie

Zamora

2019

Electric Power Systems Research

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Dynamic thermal analysis of a power line by simplified RC model networks: Theoretical and experimental analysis

Cited by 6 publications

References 14 publications

Transient Temperature Calculation and Multi-Parameter Thermal Protection of Overhead Transmission Lines Based on an Equivalent Thermal Network

Transient Temperature Calculation and Multi-Parameter Thermal Protection of Overhead Transmission Lines Based on an Equivalent Thermal Network

Electro-Thermal Modeling and Design of High-Current Pulse Power Supply for Electrically Assisted Manufacturing

Non-steady state electro-thermally coupled weather-dependent power flow technique for a geographically-traversed overhead-line capacity improvement

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