TY - JOUR
T1 - Analysis and Control of Modular Multilevel Converter with Split Energy Storage for Railway Traction Power Conditioner
AU - Guo, Peng
AU - Xu, Qianming
AU - Yue, Yufei
AU - Ma, Fujun
AU - He, Zhixing
AU - Luo, An
AU - Guerrero, J. M.
PY - 2020/2
Y1 - 2020/2
N2 - In this paper, a railway power conditioner (RPC) based on modular multilevel converter (MMC) with split supercapacitor energy storage system (SCESS) is studied. In this case, the MMC-SCESS based RPC could not only provide normal negative sequence currents (NSC) compensation, but also could reduce the impact of power fluctuations caused by the locomotive braking or startup on the electric grid. Firstly, this paper analyzes the power flow patterns and deduces the reference circulating current under different operation modes of MMC-SCESS based RPC. Then, the control objectives of MMC-SCESS based RPC are divided into two categories including the balance control and the current tracking control. The balance control methods are developed for the submodules (SMs) capacitor voltages and the state of charge (SoC) of supercapacitor, which are associated with the operation modes. To ensure the current tracking performance, a model predictive direct current control (MPDCC) method is presented for MMC and bidirectional energy converter (BEC). Finally, the effectiveness of the proposed control methods is verified by the experimental results of a downscaled prototype.
AB - In this paper, a railway power conditioner (RPC) based on modular multilevel converter (MMC) with split supercapacitor energy storage system (SCESS) is studied. In this case, the MMC-SCESS based RPC could not only provide normal negative sequence currents (NSC) compensation, but also could reduce the impact of power fluctuations caused by the locomotive braking or startup on the electric grid. Firstly, this paper analyzes the power flow patterns and deduces the reference circulating current under different operation modes of MMC-SCESS based RPC. Then, the control objectives of MMC-SCESS based RPC are divided into two categories including the balance control and the current tracking control. The balance control methods are developed for the submodules (SMs) capacitor voltages and the state of charge (SoC) of supercapacitor, which are associated with the operation modes. To ensure the current tracking performance, a model predictive direct current control (MPDCC) method is presented for MMC and bidirectional energy converter (BEC). Finally, the effectiveness of the proposed control methods is verified by the experimental results of a downscaled prototype.
KW - Rail transportation
KW - Supercapacitors
KW - Mathematical model
KW - Modular multilevel converters
KW - Batteries
KW - Railway power conditioner (RPC)
KW - modular multilevel converter (MMC)
KW - split supercapacitor energy storage system (SCESS)
KW - power flow patterns
KW - balance control
KW - model predictive direct current control (MPDCC)
KW - Railway power conditioner (RPC)
KW - Modular multilevel converter (MMC)
KW - Split supercapacitor energy storage system (SCESS)
KW - Power flow patterns
KW - Balance control
KW - Model predictive direct current control (MPDCC)
KW - modular multilevel converter (MMC)
KW - power flow patterns
KW - railway power conditioner (RPC)
KW - split supercapacitor energy storage system (SCESS)
KW - model-predictive direct current control (MPDCC)
UR - http://www.scopus.com/inward/record.url?scp=85075612250&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2917065
DO - 10.1109/TPEL.2019.2917065
M3 - Journal article
SN - 0885-8993
VL - 35
SP - 1239
EP - 1255
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 8715393
ER -