Comparative study of two potential recuperating converters in DC railway electrification system for harmonic mitigation

Choi, Zhen Hang; Toh, Chuen Ling; Hilmi, M. H. Z.

doi:10.11591/ijpeds.v10.i3.pp1157-1166

Cited by 3 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In urban and suburban areas that typically adopt direct current (DC) third rail systems [1]- [3], the rolling stocks are powered by a 33 kV medium-voltage (MV) distribution network through rectifiers [4]- [6]. The abundant usage of rectifiers in the third rail systems can cause severe harmonic distortion [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of harmonic distortions in third rail electrical systems

Hoo

Chua²,

Lim³

et al. 2023

IJPEDS

View full text Add to dashboard Cite

The extensive use of power electronic converters in the third rail system increases the harmonic distortions on the rail electrical feeding systems. Electrical machines and transformers could be overheated causing premature failures of the devices. It is therefore important to address the harmonic distortions on the electrical networks during real-time operation, which includes the degraded operation, not just the normal operation. In this paper, the harmonic distortions of a third rail system are investigated using electrical transient and analysis program (ETAP) simulation software. Four operating scenarios, namely the normal operation and three degraded operations, are considered in the studies. The degraded operations occur when one of the bulk supply transformers or 33 kV feeders is out of service. The findings of the studies showed that the 11th and 13th order harmonics are the dominant harmonic orders due to the use of 12-pulse rectifiers on the third rail system. Single-tuned harmonic filters are designed and placed in the 33 kV feeders to mitigate the individual voltage harmonic distortion (IHDv) and the total voltage harmonic distortion (THDv) so that it is within the statutory of IEEE 519:2014.

show abstract

Section: Introductionmentioning

confidence: 99%

Mitigation of harmonic distortions in third rail electrical systems

Hoo

Chua²,

Lim³

et al. 2023

IJPEDS

View full text Add to dashboard Cite

show abstract

“…However, as the traction rectifier is uncontrolled, power resistors must be activated to comsume braking energies harvested by a stopping train Figure 1(a). Literatures [5], [6], had proposed to introduce a DC power recuperating system to transmit the braking energy back to the utility grid. Some simulation studies have concluded that about 10% to 40% of energy saving could be achieved with a recuperating system [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Modelling and design of grid voltage oriented vector control scheme for DC railway recuperating system

Ling Toh,

Wei Tan

2023

IJEECS

View full text Add to dashboard Cite

The braking energy harvested by a railway vehicle can be restored to the utility grid with a power recuperating system. A grid connected voltage source inverter (VSI) is commonly used as a grid-feeding converter in the recuperating system. This paper proposes to integrate grid voltage oriented vector control (GVOVC) and third harmonic voltage injection pulse width modulation (THVI-PWM) technique for the VSI to ensure grid voltage and frequency synchronization. A simulation study is carried out to evaluate the feasibility of the proposed control and modulation schemes using MATLAB/Simulink. The results show that the proposed controller may reach steady-state operating mode within 7 ms by producing good quality AC voltages and currents waveforms. With the independent control of voltage quantities in dq reference frame, the regulation of active and reactive power could be realized.

show abstract