| Summary: | 碩士 === 國立中山大學 === 電機工程研究所 === 83 === In order to gain a good performance, decoupled load flow
method has been adopted in solving the transmission network and
other related programs. Newton Raphson and Gauss-Seidel based
algorithms are the most commonly used methods in solving the
power flow .The former one has a better convergent
characteristic, however,it needs rebuilding the new Jacobian
matrix at each iteration. The latter one has a constant
admittance matrix but it needs more iterations toconverge.
According to the Cartesian network model,this thesis will try
to integrate all the distribution equipment into the decoupled
load flow program to further enhance the art in solving
distribution load flow. The above assumptions are not valid
when the system is under a severe condition, not to mention the
application to a distribution system which has very different
characteristics. developed a new model to deal with
distribution networks which are normally radially structured
with r>x and 3-phase imbalance. Based on the new model, this
thesis first deals with the integration of various kinds of
power equipment. These equipment include 3-phase transformers,
co-generators, 3-phase capacitors, shunt capacitors, voltage
regulators and so on. Each equipment will be studied to see if
it can be incorporated in either the form of the equivalent
current-injection or the form of an entry in the Jacobian
matrix. A small system is also provided to include all kinds
of equipment to observe the behavior of convergence. The
robustness tests were also conducted by changing the feeder r/
x ratios. Other tests include feeder looping test, performance
test and maximum error analysis. In addition, this thesis also
analyzed the impact of the winding of the 3-phase transformers.
The computer memory storage of every load flow method is
discussed too.
|
|---|
