Standstill Time-Domain Response Parameter Estimation of the Large Synchronous Condenser in Arbitrary Rotor Position

Ma, Yiming; Zhou, Libing; Wang, Jin

doi:10.1109/access.2020.3022361

Cited by 15 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the discriminant condition is satisfied, the equivalent circuit parameters at time t are output, otherwise Equation (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) are returned for recalculation.…”

Section: Parameters Identification Of Timevarying Equivalent Circuitmentioning

confidence: 99%

“…Currently, the research on the parameters of large-capacity synchronous condensers mainly focuses on the optimisation of transient parameters [14][15][16][17], and there are few studies on the equivalent circuit parameters. Because the LSC is a particular synchronous machine, its equivalent circuit parameter calculation method refers to the synchronous machine.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Parameters Identification Of Timevarying Equivalent Circuitmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…The authors in Ref. [10] used the online static time domain response test method for parameter identification, but the SC is a large-capacity device, and it is difficult to test the parameters online.…”

Section: Introductionmentioning

confidence: 99%

Reactive Power Output Modeling of Synchronous Condenser in UHVDC Converter Station Based on Interlaced Superposition CNN-BiLSTM

Wang,

et al. 2023

Int J Comput Intell Syst

View full text Add to dashboard Cite

To guarantee stable power system operation, a synchronous condenser (SC) is configured in an ultra-high voltage direct current (UHVDC) converter station to provide dynamic reactive power support to the power system. The research on the reactive power output modelling of a SC in an UHVDC converter station has important theoretical significance and practical value for the reactive power control of a SC in an UHVDC converter station. Focusing on the reactive power regulation system of the SC with strong coupling, multivariable, and nonlinear features, it is difficult for the universal analytic method to build the SC reactive power output model. A novel reactive power output model of the SC in the UHVDC converter station based on interlaced superposition convolutional neural network-bidirectional long short-term memory (CNN-BiLSTM) is proposed, in which a novel interlaced superposition CNN composed of convolution units with two different structures is built to increase the depth of the network and avoid over-fitting. Particularly the branch channels of convolution units with two different structures are connected by a convolution layer and a skip connection respectively. The interlaced superposition CNN-BiLSTM model is that the combination of the interlaced superposition CNN model and BiLSTM model for improving the model accuracy and generic capability. The Bayesian optimization method is used to optimize its hyperparameters. The application of interlaced Superposition CNN-BiLSTM in SC reactive power output modelling is a new technology. The excitation voltage and excitation current of the SC are used as inputs for the training and testing sampled data, and the reactive power of the SC is used as outputs for the training and testing sampled data. Therefore, the reactive power output model of a SC in an UHVDC converter station based on interlaced superposition CNN-BiLSTM is obtained, and it attains a low root mean square error (RMSE = 0.126750) and a high determination coefficient (R2 = 0.999999).

show abstract

“…Earlier works assumed the rotor to be aligned with the d-or q-axis, or provide a procedure to align it [10], [11], [12], [13], [14], [15], [16], [17], [18], which is nearly impossible to achieve for large power units. However, recent contributions take another path to simplify the measurements, allowing for arbitrary rotor positions [19], [20], [21]. Nevertheless, they lack direct comparison against the sudden short-circuit test nor provide any complete precision sensitivity analysis in the case of a practical power application.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Precision of the DC Decay Test Method for Characterizing Wound-Field Synchronous Machines in Power Plants

Maurer,

Øyvang,

Nøland

2023

IEEE Open J. Power Energy

View full text Add to dashboard Cite

The sudden short-circuit test is the gold standard for determining the equivalent diagram of wound-field synchronous machines (WFSMs). Only a single measurement is needed while the machine is in saturated mode. However, this destructive test can significantly reduce the lifetime of the stator winding. Moreover, determining the equivalent diagram in the q-axis is more complicated and is often not performed. DC-decay tests are low-power alternatives that allow for the determination of the equivalent diagram in both axes without damaging the machinery. Until recently, they required the rotor to be aligned with the axes, which is not feasible in large power plants. A recent breakthrough eliminated the need for rotor alignment by proposing a DC-decay test that can be performed with the rotor in any position. However, numerous independent measurements are needed to obtain the equivalent diagram in both axes. This paper addresses the question of the minimum number of independent measurements needed for the DC-decay test to be practical for industrial use. Around 10 measurements are sufficient for reasonable precision, while 5 of high quality are sufficient using the symmetry of the root locus. Finally, a comparison against the short-circuit test shows that the DC-decay test is a valid alternative.INDEX TERMS DC decay methods, parameter identification, pole estimation, equivalent diagrams, synchronous machines, current measurement, transient analysis, three-phase short-circuit.

show abstract

Standstill Time-Domain Response Parameter Estimation of the Large Synchronous Condenser in Arbitrary Rotor Position

Cited by 15 publications

References 21 publications

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

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

Reactive Power Output Modeling of Synchronous Condenser in UHVDC Converter Station Based on Interlaced Superposition CNN-BiLSTM

Evaluating the Precision of the DC Decay Test Method for Characterizing Wound-Field Synchronous Machines in Power Plants

Contact Info

Product

Resources

About