In a dc transmisiona)it is necessary for the sending and receiving end...
As operating frequency, f = 0 therefore, there is no effect of XL and XC.
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In a dc transmisiona)it is necessary for the sending and receiving end...
DC Transmission: Effects and Limitations
Effects on DC Transmission Lines
- DC transmission lines do not have any effect due to inductive and capacitive reactances.
- This is because the voltage and current in a DC transmission line remain constant and do not change polarity, unlike in an AC transmission line where the voltage and current constantly change direction.
- As a result, there is no reactive power flow in a DC transmission line, which eliminates the need for reactive power compensation.
Limitations of DC Transmission Lines
- The power transfer capability of a DC transmission line is mainly limited by the stability considerations.
- The stability of a DC transmission line depends on the characteristics of the converter stations at both ends of the line.
- The maximum power transfer capability of a DC transmission line is limited by the stability margin, which is the difference between the actual operating point of the system and the point at which instability occurs.
- In order to maintain stability, the converter stations must be able to control the voltage and current on the DC transmission line.
- This requires sophisticated control systems that can respond quickly to changes in the system, such as changes in the load, fault conditions, or changes in the AC system to which the DC transmission line is connected.
Conclusion
In summary, DC transmission lines do not have any effect due to inductive and capacitive reactances. However, the power transfer capability of a DC transmission line is limited by stability considerations, which require sophisticated control systems at both ends of the line.
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