Week 10

Featured

Implementation of the Onshore Converters on the simulator with DC voltage control and reactive power control (Injected / Absorbed).

Simulations and corrections with positive results. System function properly.

Share

Week 9

Featured

I this week was doing the necessary adjustments on the simulator to include the other onshore converter station and the others two lines transmission.

Was even included a different model of voltage control in order to take advantage of a power sharing between the two stations, beneficial in situations of network failures.

It were obtained the first correct results of the simulator even with a basic model of control onshore converter and without upstream network.

 

Share

Week 8

Featured

Week of adjustments and Simulink study, we proceeded to diverse corrections on simulator, achieving solution to the study of two parks, a converter station onshore and two transmission lines.

It was even built a basic model to a converter with voltage control for the converter station onshore.

 

Share

Week 7

Featured

After meeting with the supervisor, the equations of the network were approved and in  this week, the implementation of simple scheme studied in Week 5 was initiated, representing the equivalent equations of the simplified scheme in the simulation environment with the help of Matlab Simulink application.

Share

Week 6

Featured

Continuation of work developed on Week 5.

Inclusion of another Onshore converter station and two more lines, one connecting the wind farm 2 to the converter station 2 and another between the two Onshore converter stations. Therefore the next figure represents the final network.

digitalizar0001

 

Share

Week 5

Featured

Some work of literature was also developed during this week, and was even made ​​an introduction to the study of direct current transmission systems.

Schema definition of multi-terminal HVDC network through the equational representation of the lines and buses. Assuming that the lines are represented by the model in pi, as in figure 1, the following equations represent the network shown in Figure 2.

  • Voltages equations at nodes (voltage in a similar capacity at the ends of lines with the capacity of the cable in parallel with the capacity of converters);
  • Current equations of the lines;
  • Equations of the flow of currents and powers in the nodes;

Figure 1

modelo em pi

 

Highlighting that the network under test is a Bipolar Network, so this representation is only one pole, the other is connected in parallel with connection to the same ground point.

Figure 2

Rede Incompleta

 

Share

Week 3

Featured

Bibliographical study about:

  • HVDC transmission systems based in HVDC-VSC Converters;
  • Topologies of multi-terminal transmission HVDC-VSC for offshore wind farms;
  • Control and modeling;
Share

Week 1

Featured

Start of the reading literature. Articles available on the page Literature.

Keys words of the week:

Offshore Wind Energy;
HVAC Systems – High Voltage Alternating Current Transmission Systems;
HVDC Systems – High Voltage Direct Current Transmission Systems;

  • HVDC-LCC Converters;
  • HVDC-VSC Converters;

MTDC Networks – Multi-Terminal HVDC;

 

Share