HVDC - Current Source Converter - Minimum DC Power flow

In summary, there are two main types of DC/AC converters: Current Source Converters (CSC) and Voltage Source Converters (VSC). One key difference between them is that CSCs require a minimum DC power flow of 5-10% while VSCs do not have this requirement. This is also referred to as a "deadband" and it may be related to the use of thyristors in CSCs. The article mentioned a table that compares the two technologies and states that CSCs require a minimum flow at Minimum DC Power, but it does not explain why.
  • #1
micuklein
7
0
Hello,

I was reading about the differences between Current Source Converters and Voltage source converters.
One main difference was that Current source converters need to have a minimum DC power flow of 5-10% while VSC do not have a min flow requirement. It was also called a deadband.
Why is this? Does it have to do with the thyristors? If so, how?

Thanks!

Regards,

mk.
 
Engineering news on Phys.org
  • #2
No opinions?

Thanks!
 
  • #3
We have no real idea what you're talking about.

How about pasting in the paragraph that confused you ?
 
  • #4
Hi Jim,

This is the article I was reading on the technological differences between different types of DC/AC convertors( LCC vs. VSC ).
www2.nationalgrid.com/WorkArea/DownloadAsset.aspx?id=13784
There is a table on page 3 that compares the 2 technologies side by side.
At Minimium DC Power, it is said that the LCC requires a flow of at least 5-10% of the rated power.
I am trying to understand why this is the case.
 

1. What is HVDC and how does it differ from AC?

HVDC stands for High Voltage Direct Current and is a method of transmitting electricity over long distances. Unlike AC, which switches direction periodically, HVDC uses a constant direct current flow.

2. What is a Current Source Converter (CSC)?

A Current Source Converter is a type of power electronics converter used in HVDC systems to convert AC power to DC power. It is able to control the amount of current flowing through the system, making it useful for controlling power flow.

3. What is the purpose of Minimum DC Power flow in HVDC systems?

The Minimum DC Power flow is used to maintain a stable voltage and current in the HVDC system. This ensures that the system can operate efficiently and avoids any voltage or current instabilities that could cause disruptions to the power flow.

4. How does Minimum DC Power flow affect power transmission efficiency?

The Minimum DC Power flow can affect power transmission efficiency by controlling the amount of power flowing through the system. By maintaining a minimum level of power, the system can operate more efficiently and avoid any losses that may occur at lower power levels.

5. What are the benefits of using a Current Source Converter for HVDC systems?

The use of a Current Source Converter in HVDC systems offers several benefits, including better control over power flow, improved stability, and reduced losses. It also allows for the integration of renewable energy sources into the DC grid and enables the transmission of power over longer distances.

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