Case study of a Multi-Infeed HVDC system

• There are serious concerns relating to a Multi- Infeed HIVDC system when feeding a weak AC network. Typical issues concerning multi-infeed configurations are: need for coordination of the recovery control, need for different DC modulation strategies to stabilize the system, possibility of voltage instability of the area receiving large amount of power from multiple HVDC links and the risk of mutual commutation failures. In contrast, if the area receiving electrical power from multiple HVDC transmission links is relatively strong due to the presence of large amount of generation units nearby there are still some questions that need to be investigated such as the issues underlining the operation of such a multi-infeed system, the proper design of the controls of the HVDC systems and the system dynamic performance under extreme contingencies. This paper investigates into an example of such a multi-infeed HVDC system. The authors have performed small signal analysis of the system to assess instability associated with the control modes. Electromechanical and voltage stability analysis were performed for harmful contingencies. Dynamic performance analysis was also carried out to analyze the interaction amongst various HVDC inverters during disturbances.

Ämnesord

NATURVETENSKAP  -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)

NATURAL SCIENCES  -- Computer and Information Sciences -- Computer Sciences (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

Control

Dynamic performance

HIVDC transmission

Multi-infeed

Simulation

Stability

Dynamic analysis

Electric power transmission networks

Power transmission

Signal analysis

System stability

Ac networks

Commutation failures

Control modes

DC modulations

Dynamic performance analysis

Electrical power

Extreme contingencies

Generation units

Hvdc links

Hvdc systems

Hvdc transmissions

Multi-infeed HVDC systems

Proper designs

Recovery controls

Small-signal analysis

System dynamic performance

Voltage instabilities

Voltage stability analysis

HVDC power transmission

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)