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# What are ac and DC load lines?

###### Wiki User

###### 2008-04-08 14:28:10

A dc load line is formed by joining the 2 points wherin the

slope is equal to the inverse of the load resistance.. whereas the

ac load lin has a different slope... and it intersects the dc load

line at the quiescent point.

## Related Questions

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### What is meant by resistive load and reactive load?

A resistive load exhibits a pure resistance all the way down to
DC. A reactive load (an inductor) presents negligible resistance at
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reactive load is frequency dependent and will need to be calculated
relative to the AC frequency of operation.

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### Does a transformer convert AC to DC?

No, a transformer does not change AC to DC. For this purpose
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###### Asked in Electrical Engineering, Electrical Wiring

### What is DC load flow?

DC load flow is a method to estimate power flows through lines
on AC power systems.
An accurate solution of the power flows on an AC system is a
non-linear problem. Consequently it requires an iterative approach
and there is no guarantee of reaching a "convergent" solution.
A "DC" load flow uses a simplified, linear form of modeling the
AC system. Consequently its solution is non-iterative, and
absolutely convergent. It becomes a routine algebra problem,
solving multiple equations with multiple variables. It is
inherently less accurate than a "full" AC load flow solution, but
it is useful where fast, dependable solutions are essential, and
the approximation is acceptable. In reality, there is nothing "DC"
about a DC load flow. It solves for phase angles (an AC, reactive
characteristic); it ignores resistance (a DC characteristic); and
it ignores voltage (because the objective is just power flow). It
probably derives its name from the similarity between this solution
method and the method used to solve a DC system, which is also
linear, non-iterative and absolutely convergent.