Comparative Performance Study of Dynamic Reactive Power Compensators on Operating Characteristics of LCC Based UHVDC System Under Hierarchical Connection Mode

Rehman, Atiq Ur; Guo, Chunyi; Zhao, Chengyong; Jiang, Wen

doi:10.1007/s42835-018-00056-y

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…To enhance the consumption of large-scale new energy and the energy supply of remote load centres, an ultra-high voltage direct current (UHVDC) transmission has been rapidly developed due to its energy allocation advantage in large regions [1]. However, once serious faults or large disturbances such as DC blocking and commutation failure occur at the weak receiving end power grid, the balance of active power and reactive power is greatly impacted, resulting in insufficient dynamic reactive power compensation of the power system, further causing system voltage depression and unstable power grid operation [2,3].…”

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

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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).

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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

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“…The influence of SC on cascaded CFs of UHVDC‐HIM system is presented in [9]. The detailed comparative study regarding the performance of various RPCs on the transient behaviour of UHVDC‐HIM system is established in [10]. However, these literature works have not addressed the quantitative evaluation or analytical formulation regarding the impact of RPCs on AC system's strength of UHVDC‐HIM system with consideration of HIM.…”

Section: Introductionmentioning

confidence: 99%

Quantitative index to evaluate the impact of reactive power compensators on AC system's strength of UHVDC transmission under hierarchical infeed mode

Rehman

Guo

Zhao

2019

IET Generation, Transmission & Distribution

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AC system’s strength evaluation of UHVDC system under hierarchical connection mode

2021

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Comparative Performance Study of Dynamic Reactive Power Compensators on Operating Characteristics of LCC Based UHVDC System Under Hierarchical Connection Mode

Cited by 5 publications

References 15 publications

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

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

Quantitative index to evaluate the impact of reactive power compensators on AC system's strength of UHVDC transmission under hierarchical infeed mode

AC system’s strength evaluation of UHVDC system under hierarchical connection mode

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