讲解 MSc Renewable Energy Systems Integration (RESI) - 2024 Assignment-2调试R语言程序

MSc Renewable Energy Systems Integration (RESI) - 2024

Assignment-2

Instructions

Marks: 25% of total mark of the module.

Due date and time: on Friday 15th  March 2024 at 2 pm

Each student is required to submit an individual and formal report. The problem has no unique approach/ solution and therefore the methods/ solutions are expected to be varying from one student to another.

Students may make best possible assumptions if any extra information  is required, however, they should be justified in a  Micro Grid and distributed generation integration context, giving relevant justifications and appropriate references.

Submission will be via Canvas, please familiarise yourself with Canvas before submissions are due. Files are to be smaller than 20MB to be able to submit to the Canvas.

1000 word-limit report must not be more than  10 pages, excluding the cover page and Appendices. Minimum font size of the body of the report should be  11. Font size of the captions of figures and tables must be 10. The file type of the report must be PDF. Please use IEEE referencing style. Your assignment submission report must follow the task numbering format of this assignment and marks will be given only if the report is prepared following the task numbers given in the assignment. Software based calculations can only be used to verify the accuracy of hand calculations. Body of the report should be presented with sample calculations and any repetitive calculations can be placed in Appendices.

Late submissions will be penalised by deducting 5% marks per day late. Assignments will not be accepted more than 20 days late after the submission deadline.

Assignment details

The assignment is about integration of wind farms in Micro Grids to a utility power grid.

Figure 1 show a schematic diagram of three wind farms (Wind Farm 1, Wind Farm 2, and Wind Farm 3) in three Micro Grids that are planned to integrate with a utility power grid via three power transformers  (T1 , T2 , and T3). Wind farm 1and 3 are constrained to install maximum of ten and five fixed-speed wind-turbine induction generators respectively. Wind Farm 2 has no restriction on installing a number of fixed-speed wind-turbine generators however; the generated power should be within the  safe  and  secure operating  limits  of relevant network assets.  All wind turbine generators are operated at 50 Hz and at 690 V. Each wind turbine generator at Wind Farm 1, 2, and 3 are rated at 650 kVA, 800 kVA, and 750 kVA respectively.

Table 1 gives the parameters of wind turbine generators referred to the stator in Ω /phase in all three Micro grids corresponding to the wind farm site.

Table 1

Table 2 gives the slip of induction generators in all three Micro grids corresponding to the wind farm site.

Table 2

The leakage reactance values of transformer T1 , T2 , and T3 are given as 0.062 pu, 0.085 pu, 0.55 pu respectively. The utility power grid requires 18 MW with an allowed maximum variance of +5% of power-imports at full-load operation at Bus 1 with the participation of all three wind farms.

Table 3 gives the per-phase feeder technical data which can be used to determine the sizes of feeders that are appropriate for the Micro Grid project. Wind farm feeders are to be designed to carry at least 150% of excess loading from the full load operating condition of each generating site at any-time in the operating horizon of the Micro Grid project. It is also given that each wind turbine generator de-rates at 1.2% per year from their installed capacities after ten years of operation.

Table 3

Considering that you are the design engineer in this Micro Grid project, proposing an effective duration to operate the project, and applying a convergence error tolerance of 10-5  in your iterative calculations:

Part (1) (i) Calculate number of wind turbine generators proposed to install at each wind farm site (Wind Farm 1, Wind Farm 2, and Wind Farm 3).

(ii) Calculate power generated and consumed by wind turbine generators at each wind farm site at full load and no load operation.

(iii) Calculate and list the appropriate feeder sizes to suit the system conditions given in the Micro Grid project.

(iv) Calculate voltage at each Bus at full load and no load operating conditions.

(v) Determine the installation locations (buses) of capacitor banks and calculate the required capacitance values at respective locations to reduce the no load current of all induction generators to zero.

(vi) Calculate the voltage at Buses with the calculated capacitor bank in (v)

(vii) Calculate the full load active and reactive power losses of all branches in the system with capacitor banks calculated in (v) and without. [60 Marks]

Part (2) Calculate Life Cycle Cost (LCC) of the Micro Grid project (system connecting up to the utility grid) and justify the technical and economic feasibility of the design given in Figure 1. [20 Marks]

Part (3) Present a formal report covering Part (1) to (2) sections, presenting the engineering judgements you made, a discussion, conclusion, and references (marks are given to five key references). The arguments, discussions, and conclusions must be made by referring to the given case of the assignment. No marks will be given if students just reproduce conclusions, discussions, or justifications that are commonly available in published literature. [20 Marks]

Students are allowed make reasonable and realistic assumptions; however, they should be technically feasible and economically justified. Students may use online (or published) technical data apart from the data given in the assignment; however, the sources of information should be given as references. The marker will only mark what is in the body of the report and not the contents in the appendices. Long tables of data such as Excel tables should be placed in appendices. Sample calculations must be provided in the body of the report in all repetitive calculations.

Figure 1: Three wind farms in three Micro Grids connecting a utility power grid. l = length of the feeder.