DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

Parker, M. S.; Holliday, Derrick; Finney, S.J.

doi:10.1049/joe.2018.8149

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the process between (b) and (c), a resonance phenomenon occurred in the circuit, and energy exchange between the inductor and the capacitor occurred. This is explained in the state of Equation ( 8) by Equation (5).…”

Section: Reviewmentioning

confidence: 99%

“…In the DC system of the future, when DC systems of various levels are integrated into one system, the grid stability will be as high as the existing AC system. Accordingly, the breaking capacity of the system also increases; therefore, a circuit breaker suitable for DC characteristics must be developed [5]. Unlike AC, DC fault current does not have a cutting-off zero point; therefore, there is difficulty in breaking it at a high current level.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Modeling of the LC Divergence Oscillation Circuit of a Superconducting DC Circuit Breaker Using PSCAD/EMTDC

Park¹,

Kim²,

Jeong³

et al. 2022

Energies

View full text Add to dashboard Cite

We proposed a superconducting DC circuit breaker that can reliably cut off the fault currents in preparation for the DC system. It consists of a superconducting element and a mechanical DC circuit breaker. The mechanical DC circuit breaker is connected in parallel with a mechanical high-speed switch, an LC divergence oscillation circuit, and a surge arrester. This provides stable cutoff operation due to the fault-current-limiting operation of the superconducting element and the artificial current zero point of the mechanical DC circuit breaker. In this paper, the operating principle of the LC divergence oscillation circuit that creates an artificial current zero point was reviewed based on the theory. We used experimental data to model the time constant of the initial fault current, the arc model generated by the mechanical high-speed switch, and the experimental equipment. As a result, the LC divergence oscillation circuit was confirmed in the simulation, and simulation modeling was reviewed based on the theoretical principle of generation.

show abstract

Section: Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Modeling of the LC Divergence Oscillation Circuit of a Superconducting DC Circuit Breaker Using PSCAD/EMTDC

Park¹,

Kim²,

Jeong³

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…To minimize power interruption through prevention of total shut down of the DC grid, the uses of different types of DC circuit breakers (DCCBs) are investigated in [15][16][17] in effort to enable fast and selective fault clearance in MTDC networks. However, the high costs and large footprints of DCCBs and their associated current limiting inductors reduce the viability of offshore DC grids.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Shi

Adam

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

In recent years, several DC fault clearance schemes have emerged, in which reduced number of fast acting DC circuit breakers (DCCBs) and AC circuit breakers (ACCBs) are used to clear DC faults. In offshore DC grids, such approach entails opening of the ACCBs that connect the wind farms to the offshore HVDC stations which control offshore AC voltages and frequencies, potentially leading to uncontrolled offshore voltage and frequency. Existing studies show that the loss of offshore converter due to blocking or sudden opening of ACCBs can cause significant over-voltage and over-frequency in the offshore AC grid, which could necessitate immediate shutdown of the wind farm. An enhanced control for wind turbine converters (WTCs) of the offshore wind farm is proposed to enable retention of AC voltage and frequency control when the offshore converter is lost, in which seamless transition of the WTCs between grid following and forming modes is facilitated. The viability of the proposed control is demonstrated in wider context of partially selective DC fault protection in an illustrative meshed DC grid, which includes detailed implementations of DC fault clearance, system restart and power transfer resumption. The presented simulation results confirm the effectiveness of the proposed WTC control in preventing excessive rise of offshore AC voltage and frequency and facilitating DC fault ride-through using reduced number of DCCBs.

show abstract

Compensation of distortions in VSC-based DC–AC power systems using a modified vector control method

Fallah

Kojabadi

Pashajavid

et al. 2021

Control Engineering Practice

View full text Add to dashboard Cite

DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

Cited by 5 publications

References 15 publications

The Modeling of the LC Divergence Oscillation Circuit of a Superconducting DC Circuit Breaker Using PSCAD/EMTDC

The Modeling of the LC Divergence Oscillation Circuit of a Superconducting DC Circuit Breaker Using PSCAD/EMTDC

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Compensation of distortions in VSC-based DC–AC power systems using a modified vector control method

Contact Info

Product

Resources

About