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Integration of EV Converter/Inverter stations and PV farm on Power

Quality of Grids using PSCAD

With the increasing penetration of renewable energy. Inverter-Based Resources (IBRs) are

gradually replacing synchronous generators in power grids. Present-day IBR control may

be insufficient to ensure grid stability in a future inverter dominated power grids. One of the

main causes of instability is poor power quality. In this assignment you will be investigating

the power quality of a typical IBR grid as shown in the circuit of the figure below.

The figure consists of a single phase 240 Vrms, 50 Hz source and:

• Three resistive loads. Each load has a resistance of 48 0.

Three EV charging converters/Inverters through a 24 resistor.

A solar farm that is composed of 15 PV panels. Each panel has a rating of 24 V and

current of 15 A. Panels are connected in series and parallel to provide an output

voltage and current of 240 Vrms and 45 A respectively.

240 Vrms

50 Hz

V, 1,1

Transmission Line 1

TL1 -0.05

Transmission Line 2

Mini Solar Farm

TL2 = 0.05 P

Converter

N

24

460

52

EV

Converter/Inverter

FL

480

Load/nDemonstration of the above concept will be achieved with the following steps:

I. Construct the skeleton of the given circuit in PSCAD.

Design appropriate Inverters/Converters for this circuit.

Calculate all the required values for each circuit component etc.

II.

III.

IV.

Measure voltage and current at the generator side and then investigate the quality of

measured V, I and frequency for the following scenarios:

a) The circuit operating under fully normal conditions (without the EV

charging/discharging stations and Solar farm)

b) The circuit operating in semi normal condition (some of the EV charging

stations and the solar farm are switched in)

c) The circuit operating under no normal conditions (the EV charging stations

and/or solar farm are switched in and out).

Marking Scheme

Introduction and Literature Review

10 Marks

Design of Inverters and converters

10 Marks

Creating various scenarios with the given switches in the above circuit.

10 Marks

Construction of the above circuit in PSCAD

20 Marks

Results and Analysis: Demonstration of scenarios with the constructed circuit in PSCAD

Conclusion and report presentation

10 Marks

References

Bonus for employment of PV module and EV Module

Published date: 10th October 2023

extension pscx

10 Marks

10 Marks

20 Marks

(Please note, you will need to submit your constructed PSCAD file with

()

Fig: 1

Fig: 2