Answer Happy

DESIGN PROJECT: A NEW WIND FARM You’ve just been hired as a newpower engineer with Kyle and Weber Wind (KWW), one of the country’sleading wind energy developers. KWW has identified the rollinghills to the northwest of the etropolis urban area as an ideallocation for a new 200 MW wind farm. The local utility, MetropolisLight and Power (MLP), seems amenable to this new generationdevelopment taking place within their service territory. However,they are also quite adamant that any of the costs associated withtransmission system upgrades necessary to site this new generationbe funded by KWW. Therefore, your supervisor at KWW has requestedthat you do a preliminary transmission planning assessment todetermine the least cost design. Hence, your job is to makerecommendations on the least cost design for the construction ofnew lines and transformers to ensure that the transmission systemin the MLP system is adequate for any base case or firstcontingency loading situation when the KWW wind farm is installedand operating at its maximum output of 200 MW. Since the wind farmwill be built with Type 3 DFAG wind turbines, you can model thewind farm in the power flow as a single, equivalent traditional PVbus generator with an output of 200 MW, a voltage setpoint of 1.05per unit, and with reactive power limits of ±100 Mvar. In keepingwith KWW tradition, the wind interconnection point will be at 69kV, and for reliability purposes your supervisor requests thatthere be two separate feeds into the interconnection substation.The following table shows the available right-of-way distances forthe construction of new 69 kV and/or new 138 kV lines. All existing69 kV only substations are large enough to accommodate 138 kV aswell. (1). Load DesignCase1 into PowerWorld Simulator. This casecontains the initial system power flow case, and the disconnectedKWW generator and its interconnection bus. Perform an initialpower-flow solution to determine the initial system operatingpoint. From this solution you should find that all the line flowsand bus voltage magnitudes are within their limits. Assume all lineMVA flows must be at or below 100% of their limit values, and allvoltages must be between 0.95 and 1.10 per unit. (2). Repeat theabove analysis considering the impact of any single transmissionline or transformer outage. This is known as n-1 contingencyanalysis. To simplify this analysis, PowerWorld Simulator has theability to automatically perform a contingency analysis study.Select Tools, Contingency Analysis to show the Contingency Analysisdisplay. Note that the 57 single line/transformer contingencies arealready defined. Select Start Run (toward the bottom right cornerof the display) to automatically see the impact of removing anysingle element. Without the KWW generation the system has nocontingency (n-1) violations. (3). Using the availablerights-of-ways and the transmission line parameters/costs given inthe table, iteratively determine the least expensive systemadditions so that the base case and all the contingences result inreliable operation points with the KWW generation connected with anoutput of 200 MW. The parameters of the new transmission lines(s)need to be derived using the tower configurations and conductortypes provided by the instructor. In addition, the transmissionchanges you propose will modify the total system losses, indicatedby the yellow field on the one-line. While the system losses arenot KWW’s responsibility, your supervisor has asked you to considerthe impact your design changes will have on the total system lossesassuming the system operates in the studied condition for the nextfive years. Hence, you should minimize the total construction costsminus the savings associated with any decrease in system lossesover the next five years. (4). Write a detailed report includingthe justification for your final recommendation.