Generic Model Data Embedded Generation Module Assignment 2 Lecturer K. Sunderland (Issued 07 April 2020) Assignment Weighting 60% You have been brought in as a consultant to advise a Distribution...

This is powerwolrd simulation assignment and a full report is required from the analysis carried out


Generic Model Data Embedded Generation Module Assignment 2 Lecturer K. Sunderland (Issued 07 April 2020) Assignment Weighting 60% You have been brought in as a consultant to advise a Distribution System Operator (DSO) as to the impacts of adding embedded generation to an existing rural distribution network. The network is shown in Figure 1 and the associated generic model data is given in Table 2. Following consultations with the DSO it is clear the DSO is concerned with the impact increasing levels of embedded generation will have upon following: • Circuit and equipment loading • Distribution system losses • Voltage and voltage control requirements • Short circuit levels It is agreed a study will be conducted to compare the performance of the system with embedded generation connected against a base case with no embedded generation connected. Separate exemplar simulations are to be carried out for the following ratings of embedded generation 1 MW, 2.5 MW and 5 MW operating at unity power factor and 0.95 power factors lagging. The DSO has requested the scenarios listed in Table 1 below be investigated. Table 1 Scenario Generator Rating Gen Connected at 1 5 MW @unity and 0.95 p.f. lag Bus B 2 5 MW @unity and 0.95 p.f. lag Bus E 3 2.5 MW @unity and 0.95 p.f. lag Bus C 4 2.5 MW @unity and 0.95 p.f. lag Bus E 5 1.0 MW @unity and 0.95 p.f. lag Bus C 6 1.0 MW @unity and 0.95 p.f. lag Bus E Table 2: Generic Model Data Component Description 38 kV/10.5 k/V Transformer 5.0 MVA, 38 kV/10.5 kV nominal ratio Z = (0.012 + j0.18) p.u. on own rating Automatic Tap Changer maintains the output voltage at 1.025 pu 38 kV Busbar Fault Level at Bus A 850 MVA Voltage level at Bus A Maintained at 1.0 pu 38 kV Feeder Overhead line with Z = (0.054 + j0.4) Ω/km Rating 5.0 MVA 10 kV Feeder Overhead line with Z = (0.2 + j0.08) Ω/km Rating 2.5 MVA 10 kV Spur Overhead line with Z = (0.32 + j0.087) Ω/km Rating 0.5 MVA Max Busbar Loads As specified on the diagram Min Busbar Loads One eight of specified max loads Generators For fault analysis assume each generator has a transient reactance of 2% based on its own rating. CB short circuit interrupting capacity Ratings at 10 kV buses 16 kA CB short circuit interrupting capacity Ratings at 38 kV buses 16 kA 0.95 p.f. lagging Figure 1 Please note this is an individual assignment and all work submitted must be your own work. You are required to submit: (a) A full report on the study, which should be in a professional format suitable for presentation to the DSO. The body of the report should not exceed more than 3500 words and should address the key issues the DSO has requested to be addressed. Appendices may be used if necessary. Please include any calculation conducted to determine model data for your Powerworld/ETAP model in an appendix. This report must be submitted through Brightspace. The report must contain the following information, (i) Summary tables outlining the implications/ramifications arising from the different max/min load scenarios as outlined in Figure 1 and Table 1 Results should refer to voltage profile, short circuit magnitudes for the range of network buses, line losses (W, VAr). (ii) Detailed analyses of the summary results acquired. These analyses should include technical discussion concerning the implications for the network in respect to power factor variation, power quality, protection implications and implications for network switchgear. Using the data acquired from the results. In the absence of network-specific information, you are required to research the effects referring to case studies where relevant. The analyses should also include reference to Transformer voltage regulation as required to maintain the system within voltage tolerances (b) The Powerworld/ETAP model used to conduct the study must also be submitted through Brightspace.