Multiterminal HVDC Transmission Systems Incorporating Diode Rectifier Stations

2015 IEEE International Conference on Industrial Technology (ICIT)

Peña

2015

This paper presents a distributed control technique for voltage, frequency and active/reactive power control of the Point of Common Connection (PCC), AC grid, of a wind farm. Each wind turbine uses a Permanent Magnet Synchronous Generator (PMSG) with a full back-to-back VSI topology connected between the machine terminals and the PCC. A Diode-Thyristor converter topology forming a HVDC link is used for connecting the wind farm to the electricity network. The control strategy allows maximum power transfer from the wind turbines to the AC-grid, with good dynamic performance during steady state and transient operation of the AC-grid. Droop control strategies are used to regulate the voltage and frequency in the AC-grid respectively. The proposed control technique has been shown to be robust under load changes in islanded operation, capacitor bank switching, tracking of power reference and wind turbine reactive power distribution. The control technique has been validated with PSIM simulations of the system.

Section: Introductionmentioning

confidence: 99%

Distributed control strategy for a wind generation systems based on PMSG with uncontrolled rectifier HVDC connection

Andrade

2015 IEEE International Conference on Industrial Technology (ICIT)

Peña

2015

“…The use of an uncontrolled rectifier for the HVdc link presents several advantages over standard thyristor-based HVdc links, namely, lower conduction losses, lower installation costs, and higher reliability, as gate drivers are no longer needed for the rectifier converter. Moreover, if the generators are directly connected to the diode rectifiers, the use of a rectifier transformer might be avoided [2].…”

Section: Introductionmentioning

confidence: 99%

Diode-Based HVdc Link for the Connection of Large Offshore Wind Farms

IEEE Trans. Energy Convers.

Añó-Villalba

Rodríguez-D’Derlée

et al. 2011

122

This paper includes a technical feasibility study on the use of diode-based HVdc links for the connection of large offshore wind farms based on synchronous generators. A technique for the voltage and frequency control of the offshore ac grid is presented. The proposed control technique allows the operation of the rectifier end of the HVdc link in current or voltage control mode. Fault response to onshore voltage sags of up to 80% has been shown to be comparable to that of thyristor-based rectifiers. Moreover, the complete system shows an adequate fault-ride-through operation to solid short circuits at onshore inverter terminals. PSCAD R simulations are used to prove the technical feasibility of the proposed control techniques both in steady state and during transients.

“…T HE use of single generators connected to diode based HVDC rectifiers presents important advantages over traditional thyristor-based HVDC rectifier, including smaller conduction losses, smaller installation cost and higher reliability [1], [2], [3]. Moreover, the use of the rectifier transformer is no longer needed when the generators are directly connected to the diode rectifiers [2].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the use of the rectifier transformer is no longer needed when the generators are directly connected to the diode rectifiers [2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distributed voltage and frequency control of off-shore wind farms connected with a diode based HVDC link

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

Añó-Villalba

Rodriguez-DaDerlee

et al. 2010

This paper introduces a new technique for the distributed voltage and frequency control of the local ac-grid in off-shore wind farms based on synchronous generators. The proposed control technique allows the connection of the off-shore wind farm using a diode based HVDC rectifier. The system comprising the wind farm and the diode HVDC rectifier can be operated in current or voltage control mode. Fault response to on-shore voltage sags of up to 80% has been shown to be comparable to that of thyristor rectifiers. PSCAD simulations are used to prove the technical feasibility of the proposed control techniques both in steady state and during transients.