Mohammad Hoseyn Akbarpour

Abstract :

Development of transmission systems is a necessity in power network. One of the requirements of this development is making new trans miss lines, but building of new lines is expensive and time consuming.

Because of capability of phase shifting transformers in voltage phase angle change, there upon their capability for controlling active power flow, one of the applications of P.S.T, this idea purposed that instead of building of new transmission lines, to be installed in network a P.S.T. There for two discrete sample network 14 bus IEEE standard, and 230 KV & 400 KV Azarbaijan regional electric company planned network for the year 1393, are selected to accomplish selective idea on them, and to check if they are practical.

Each candidate line eliminate in these networks and step by step a P.S.T is installed after simulation network in Digsilent. In this network every line is omitted one by one and one P.S.T is installed over each line that can be connected to bus's in each two sides, sequence and multiple load flow study runs equal numbers of steps that active power loading on P.S.T for a allowable range and in two sides, power entrance, exiting, so that it can use quantities of busbar voltage and power flow across lines. assessment two index "Voltage Profile" and "Line Loading" calculation with along network power loss index (as an other index) after normalization and admixture in one final index that is named: "composition assessment index" its accrete possibility technical witting for P.S.T's suitable location instead of introduction of a new line. Afterwards for suitable cases, P.S.T's rated power arrow with contingency study and range of voltage phase variation arrows by an number of tap chenger's step.

Finally out put analysis shows that after installing a P.S.T in nerwork and Preventing some new lines results in affecting on P.S.T's ability for permanent improvement lines loading and probable improvement voltage profile and probable reduction for network's loss.

Defense Date: Monday 5 July 2010 Tim: 9-11

Location :Electrical Engineering Department