Calculation of magnetic field and eddy current loss in end clamping ring of 300MVA synchronous condenser based on a novel semi‐analytical method

Zhu, Erhang; Liang, Yanping; Han, Xiaotao; Bian, Xu; Wang, Dongmei

doi:10.1049/elp2.12269

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…In [16], [17], a coupling model of the SC and the infinite system was established to calculate the loss distribution in the rotor core and slot wedge of the SC during three types of short-circuit faults in the transmission system. Moreover, an analytical method for calculating eddy current losses in the clamping ring was proposed in [18], which also calculated the end magnetic field and losses in the clamping ring under rated operating conditions. Despite these numerous calculations for losses in the end region of the SC, none of them considered the eddy current losses in the stator structures during the UHVDC system faults.…”

Section: Introductionmentioning

confidence: 99%

Research on Transient Electromagnetic Field and Eddy Current Losses Reduction in End of Large-Capacity Synchronous Condenser During UHVDC System Faults

Zhu,

Liang,

2024

IEEE Access

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During the fault process of the ultra-high voltage direct current (UHVDC) system, the winding of the large-capacity synchronous condenser (SC) generates strong impulse current, leading to excessive eddy current losses and easily causing local overheating in the end structure. In this paper, the machine-network coupling transient model of the SC is established, and the transient characteristics of stator current and excitation current of the SC are revealed when three-phase short-circuit fault occurs at the sending end of the UHVDC system. Then, the 3-D nonlinear transient electromagnetic field calculation model of 300MVr SC is established, and the end magnetic field and the eddy current losses in the end structure at different times are analyzed. According to the distribution law of electromagnetic field, a new end topology structure which can effectively reduce the eddy current losses in the clamping ring and clamping finger is proposed. The end magnetic field and eddy losses in the traditional model (TM) and the improved model (IM) are compared, and the superiority of the improved model is verified.INDEX TERMS Synchronous condenser, electromagnetic field, eddy current losses, short-circuit fault, topology structure.

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Section: Introductionmentioning

confidence: 99%

Research on Transient Electromagnetic Field and Eddy Current Losses Reduction in End of Large-Capacity Synchronous Condenser During UHVDC System Faults

Zhu,

Liang,

2024

IEEE Access

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“…In order to maintain the voltage stability of the UHVDC transmission system, the converter station needs to match the dynamic reactive power compensation device with a large capacity and strong reactive power support capability [2]. The large-capacity synchronous condenser (LSC) can respond quickly when the system is disturbed and suppress the voltage fluctuations of the system [3,4]. It is an essential dynamic reactive power compensation device widely installed in converter stations of UHVDC transmission systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

A method for calculating the time‐varying equivalent circuit parameters of large‐capacity synchronous condenser considering field mutual leakage reactance

Han,

Liang,

Bian

et al. 2024

IET Electric Power Appl

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Accurate calculation of equivalent circuit parameters is a prerequisite for accurately calculating the large‐capacity synchronous condenser parameter model. Due to its special transient operating conditions, the high transient magnetic saturation effect during operation causes the non‐linearity and time‐varying of the equivalent circuit parameters. The field mutual leakage reactance is the critical factor affecting the field current, and the time‐varying of the equivalent circuit parameters is closely related to the field current. However, the existing equivalent circuit parameter calculation methods considering field leakage reactance cannot achieve time‐varying parameters. A calculation method of time‐varying equivalent circuit parameters based on a back propagation neural network algorithm is proposed, which solves the calculation problem of time‐varying equivalent circuit parameters considering field mutual leakage reactance. Then, a 300MVar condenser is taken as the research object, and the proposed method is used to simulate the different operating conditions of the condenser and verified by the finite element method and experiment. The results show that the method improves the calculation accuracy of the equivalent circuit parameter model, reduces the calculation time, and applies to different operating conditions.

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Calculation of magnetic field and eddy current loss in end clamping ring of 300MVA synchronous condenser based on a novel semi‐analytical method

Cited by 2 publications

References 24 publications

Research on Transient Electromagnetic Field and Eddy Current Losses Reduction in End of Large-Capacity Synchronous Condenser During UHVDC System Faults

Research on Transient Electromagnetic Field and Eddy Current Losses Reduction in End of Large-Capacity Synchronous Condenser During UHVDC System Faults

A method for calculating the time‐varying equivalent circuit parameters of large‐capacity synchronous condenser considering field mutual leakage reactance

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