Modelling and Operation of A Renewable Power Plant

· Coursework report should not be longer (excluding contents, tables, figures, and references) · Ensure the title of coursework, date, your name and matriculation number are included on the front cover.· Coursework weight is 50% of total module mark. Coursework marks will be distributed over questions as indicated. · In lab sessions, more than one method to export Simulink scope plots, curves, and data to your report will be indicated. You must use one of the indicated methods. Snapshots of waveforms are not acceptable.

An example method is given by the end of CW1 brief. · It is important you aid any explanations/comments you provide in this course work with appropriate academic references, whenever possible.

Please note the following School statement on Plagiarism: “The deliberate and substantial unacknowledged incorporation in your submission of material derived from work (published or unpublished) of another is prohibited. In such cases the work submitted is classified as illegal and will result in further action being taken by the University which may include recording a failure.

In this exercise, you will learn about the components and operation of a renewable power plant (RPP) using Matlab coding and Simulink models. The RPP consists of a 200 kW solar farm and a 10MW wind farm built of five 2MW permanent magnet synchronous generator wind turbines (PMSG-WTs). The specific purposes are: · To understand the relation between voltage and current of a photovoltaic solar panel under various operating conditions. · To understand the operation of a PV array under various operating conditions by means of Simulink modelling.

· Develop theoretical background PMSG-WT operation using simulation runs at various steady state operating points and parameter values.

· Investigation of PMSG-WT operation under AC systems faults.

· Develop understanding of PMSG-WT fault ride through methods by means of modelling and simulation.

· Operation under ac system faults.

a) Developing solar panel I-V and P-V curves at different temperature and irradiance conditions. The PV cell is a P-N junction similar to a diode. The diode V-I equation gives an expression for the current through a diode as a function of voltage. This equation for an ideal diode. 

b) The IV curve of a solar cell under light is the superposition of the IV curve of the solar cell diode in the dark and the light-generated current (IL). The light has the effect of shifting the IV curve upward where power can be extracted from the solar cell. So, illuminating a cell adds to the normal "dark" currents in the diode so that the solar cell I-V equation. 

c) Complete and run the solar farm Simulink model:Open the file named “200kW_solar_farm.slx” in Matlab. Familiarize yourself with the model and included descriptions. You will notice the solar array blocks clearly marked.

i) Open the “block parameters” of the solar array block and adjust the array structure such that eventually the power plant is composed of two arrays in parallel each array is sized for 100kW, 400A, and 270V. Note that you may need to use more than one PV array block to reflect the solar farm structure. The solar panels used are of the model Sunpower SPR-315E-WHT-D whose detailed datasheet can be found here.

ii) Run the model at the modelled levels of irradiance and temperature. Export output power profiles of each solar farm section. Export a plot of the corresponding I-V and P-V curves of (at least) one farm section and locate the operating points on these curves.

iii) Change the temperature and irradiance profiles inside the “irradiance” and “temperature” blocks, respectively, to the “random” selection. Run the model and export the output power profiles of each solar farm section. Comment on the difference with the case in part ii).

d) PMSG-WT performance under grid faults (fault-ride through capability) [45 marks] Open the file named “PMSG_WF.slx” in Matlab. Familiarize yourself with the model and included descriptions. The modelled wind farm is based on the PMSG-WT configuration shown in Fig.1. For an easier understanding of the effects of a short circuit fault on the operation of PMSG-WT, this exercise will be performed at constant wind speed.