Improved Coordinated Control Strategy for Reliability Enhancement of Parallel PFCs With LCC Restriction

Chen, Minwu; Meng, Wang; Zhang, Diya; Chen, Yingtao; Lu, Wenjie

doi:10.1109/tte.2021.3131051

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…P V F is the present value function to discount the future battery replacement cost incurred in T proj year to time zero, CRF is the capital recovery function associated with the annual discount rate and project period [15]. D and X are the number of major parallel inverters and redundant modules for PFC [29].…”

Section: Vu Emission Characteristics Of Resgmentioning

confidence: 99%

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Chance-Constrained Optimization of Storage and PFC Capacity for Railway Electrical Smart Grids Considering Uncertain Traction Load

Chen

et al. 2024

IEEE Trans. Smart Grid

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To foster the utilization of regeneration braking energy and suppress voltage unbalance (VU), a railway electrical smart grid (RESG), intergraded with power flow controller (PFC) and energy storage (ES), is proposed as an important part of next-generation electrified railways. However, under the uncertain traction load, how to design the optimal size of PFC-ES is a challenge during the planning period. Hence, this paper proposes a chance-constrained two-stage programming approach. The first-stage aims to minimising the overall cost of RESG's devices. The second-stage aims to arrange the energy flow of the PFC-ES with the objective of minimising the expected operation cost under the dynamic VU restriction, and the stochastics characteristics of traction load are transformed into a chance constraint by using a scenario approach. Then, traction power predictions are combined with multivariate Gaussian Mixture Model(multi-GMM) model to generate correlated traction power flow scenarios and to assess VU probabilistic metrics distribution with different confidence levels. Finally, a novel algorithm is designed to select the confidence level and violation probability so that the capacity planning results can ensure the high-efficient and high-quality operation of the RESG. Case studies based on an actual electrified railway demonstrate that the proposed PFC-Purchased electricity price and penalty charge c dem Electricity price of peak demand power σ l Power loss of converter c bt,uc om,v , c bt,uc om,f Fixed and variable battery or UC daily O&M cost per unit of power rating c bt,uc rep Battery or UC daily replacement cost c bt,uc P Battery or UC daily capital cost per unit of power rating c PFC P PFC daily capital cost per unit of power rating C. Variables P PFC rate Rated power of PFC P bt rate , P uc rate Rated power of battery and UC E bt rate , E uc rate Rated capacity of battery and UC

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Section: Vu Emission Characteristics Of Resgmentioning

confidence: 99%

“…Based on the multi-GMM model, the confidence intervals (CIs) of train load uncertainties xθL t , xθU t can be calculated by using the joint CDF in (29). A CI (CI θ t ) of the forecasted train power with a confidence level θ can be expressed by:…”

Section: B Traction Load Uncertainty Modelingmentioning

confidence: 99%

Chance-Constrained Optimization of Storage and PFC Capacity for Railway Electrical Smart Grids Considering Uncertain Traction Load

Chen

et al. 2024

IEEE Trans. Smart Grid

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“…As more power electronics modules and ESS have been applied in traction power supply systems for improving power quality, integrating renewables, smoothing traction load, and absorbing regenerative power, their lifespans may be significantly reduced due to poor thermal management, even leading to more frequent system failure events [10], [11]. For example, as reported in [10], the lifespan of the ESS will be reduced by two months per degree rise when the temperature is higher than 40 • C. As demonstrated in [11], the failure rates of power converters are higher than those of other devices in railway power supply system, and more than 50% of the converter failures are caused by the insulated gate bipolar transistors (IGBTs) and freewheeling diodes. Thus it is vital to enhance the reliability and extend the lifespan of the ESS and power electronics modules.…”

Section: Introductionmentioning

confidence: 99%

“…By optimizing the single-phase space vector pulse width modulation (SVPWM), the average temperature and temperature fluctuation of the power electronics modules are reduced. In [11], a coordinated control strategy to alleviate thermal stress of the power electronics modules in PFC is proposed and applied in the railway co-phase system. However, the aforementioned thermal management strategies for the power electronics modules mainly focus on individual componentlevel control rather than system-level energy management.…”

Section: Introductionmentioning

confidence: 99%

Thermal Constrained Energy Optimization of Railway Cophase Systems With ESS Integration—An FRA-Pruned DQN Approach

Xing

2023

IEEE Trans. Transp. Electrific.

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Traction power systems for electrified railways: evolution, state of the art, and future trends

Hu,

Liu,

et al. 2023

Rail. Eng. Science

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Traction power systems (TPSs) play a vital role in the operation of electrified railways. The transformation of conventional railway TPSs to novel structures is not only a trend to promote the development of electrified railways toward high-efficiency and resilience but also an inevitable requirement to achieve carbon neutrality target. On the basis of sorting out the power supply structures of conventional AC and DC modes, this paper first reviews the characteristics of the existing TPSs, such as weak power supply flexibility and low-energy efficiency. Furthermore, the power supply structures of various TPSs for future electrified railways are described in detail, which satisfy longer distance, low-carbon, high-efficiency, high-reliability and high-quality power supply requirements. Meanwhile, the application prospects of different traction modes are discussed from both technical and economic aspects. Eventually, this paper introduces the research progress of mixed-system electrified railways and traction power supply technologies without catenary system, speculates on the future development trends and challenges of TPSs and predicts that TPSs will be based on the continuous power supply mode, employing power electronic equipment and intelligent information technology to construct a railway comprehensive energy system with renewable energy.

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Improved Coordinated Control Strategy for Reliability Enhancement of Parallel PFCs With LCC Restriction

Cited by 4 publications

References 39 publications

Chance-Constrained Optimization of Storage and PFC Capacity for Railway Electrical Smart Grids Considering Uncertain Traction Load

Chance-Constrained Optimization of Storage and PFC Capacity for Railway Electrical Smart Grids Considering Uncertain Traction Load

Thermal Constrained Energy Optimization of Railway Cophase Systems With ESS Integration—An FRA-Pruned DQN Approach

Traction power systems for electrified railways: evolution, state of the art, and future trends

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