How to Measure Power Losses in the "Thyristor-Based HVDC Transmission System Average Model"?

Dear MathWorks Community,

I am conducting research on HVDC transmission systems, and I found your example "Thyristor-Based HVDC Transmission System Average Model" very useful for my studies.

🔗 Example link: https://www.mathworks.com/help/sps/ug/thyristor-based-hvdc-transmission-system-average-model.html

In my research, I aim to analyze power losses in the HVDC system. Specifically, I would like to measure:

• DC line losses (MW)
• Converter losses (MW)
• Transformer & shunt branch losses (MW)
• Generator power (MW)

I have attached an example table that illustrates the type of results I am trying to obtain.Questions:

1. What is the best way to measure power losses in this HVDC model?

• Which Simulink measurement blocks or calculations should I use?

1. If I change the HVDC line length, is it enough to update the "Line length (km)" parameter, or do I need to manually recalculate resistance, inductance, and capacitance values?

• Since the model uses Distributed Parameters Line, does Simulink automatically scale these values?

I appreciate your support and look forward to your recommendations!

Best regards,

Alexander Nikulshin

Answer 1

[Sabin]

There are blocks for power measurement. Using power measurement blocks you can compute efficiency based on input and output power. If using native Simscape blocks (not Specialized Power Systems) in Simscape Electrical, there is a variety of functions available(see https://www.mathworks.com/help/sps/simulation-and-analysis-1.html).

The Distributed Parameters Line requires resistance, inductance, and capacitance per unit length. Therefore, changing the line length will not require additional calculation for these values in the block mask.