1 PSCAD Simulation of Grid-Tied Photovoltaic Systems and Total Harmonic Distortion Analysis (original) (raw)

PSCAD Simulation of Grid-Tied Photovoltaic Systems and Total Harmonic Distortion Analysis

Abstract--With the increasing fears of the impacts of the high penetration rates of Photovoltaic (PV) systems, a technical study about their effects on the power quality metrics of the utility grid is required. Since such study requires a complete modeling of the PV system in an electromagnetic transient software environment, PSCAD was chosen. This paper investigates a grid-tied PV system that is prepared in PSCAD.

Smart Grid, Industry Trends and Power Engineering Education

2020

Her current research interests are in the area of power electronics which includes advanced converters for power supplies, power quality issues, active power filter development, utility interface issues, power conditioning systems for fuel cells, wind and solar energy systems. She holds one US patent with industry collaboration. She is an IEEE Senior member and is actively involved in funded research projects while engaged in teaching, research and consulting in the area of power electronics, motor drives, power quality and clean power utility interface issues.

Integration of Smart Grids and PV System Total Harmonics Distortion (THD) Reduction

International Journal for Research in Applied Science and Engineering Technology -IJRASET, 2020

This paper deals with renewable energy systems in modern smart grids have growth in many countries, and with that increase the quality of power becomes a major concern for power system operators, especially at the load side. Among the most important power quality challenges, the harmonics comes on top, as they affect the voltage and current quality at the point of common coupling (PCC), and negatively affects the loads. One of the most used renewable generators is the solar photovoltaic (PV) systems, where it is connected into the low voltage distribution grid using power electronics inverters, and with the increased penetration level, massive harmonic current is injected into the network. There is a need to reduced the resulting harmonics distortion and highlight its possible constraints. The simulation is performed with increasing the connected PV modules, and the results are analyzed showing high level of THD with the increased PV penetration at the PCC considering a higher loading level of the distribution transformer.

Novel Control and Harmonics Impact of PV Solar Farms

This thesis presents a novel application of Photovoltaic (PV) solar system inverter, both during night and day, as a dynamic reactive power compensator STATCOM. This technology, termed PV-STATCOM, is designed and developed for power factor correction in the networks of two utilities: Bluewater Power, Sarnia, and London Hydro. This thesis further describes for the first time, the harmonic impact studies on a utility distribution network in presence of the largest PV solar farm in Canada. This novel utilization of a PV-STATCOM for power factor correction of induction motor loads is demonstrated with (i) electromagnetic transient simulation in PSCAD/EMTDC software, (ii) real-time simulation studies in a Real Time Digital Simulator (RTDS), and (iii) Hardware-in-the-Loop (HIL) simulation studies of the PV-STATCOM controller implemented in a Digital Signal Processor based dSPACE system. Two different inverter control methods are employed -Hysteresis control and Pulse Width Modulation (PWM) control. The effectiveness of the PV-STATCOM controller is verified with different PV power outputs and at different loading conditions of the induction motor. The PV-STATCOM is able to improve the motor power factor to unity both during night and in the day even while generating real power. The harmonic impact studies of the 20 MW large scale PV solar farm and a 10 kW PV solar system are performed with the PSCAD/EMTDC model of two distribution feeders connecting to the solar farm in Bluewater Power, Sarnia. The models are validated with load flow results obtained from the CYME load flow software and Supervisory Control and Data

Smart Power Grid Tech & Applications.pdf

The fundamental way of operating the power grid has not changed for the past century. It has remained essentially the same, although the number of consumers and their needs have grown exponentially. Utilities across the world are trying to figure out how to bring the network into the 21st century and the digital computer age. This effort will make the power grid more intelligent; the latter is broadly referred to as the smart grid (SG). However, while modern technologies have transformed much of the economy, the electric industry and in particular the distribution grid has not yet embraced or implemented these technologies. This paper reviews works related to smart grid, presents the need for smart grid technologies by identifying its benefits along with different areas of its application for the realization of reliable and efficient grid structure. Proper utilization of these technologies could bring improvement to the operation of smart grids and possibly eliminate the challenges they encounter. SG makes use of information and communication technology (ICT) to take care of the reliability impact of the smart grid resources such as renewable energy, demand response, energy storage and electric transportation [1], . The SG must be connected to a secure two-way communication network with energy management tools which is essential for the aggregation of data coming from a very large number of sensors and actuators nodes. The communication network is the key enabler needed for the achievement of SG. Communications provides advanced control and monitoring, including supporting the involvement of generation, transmission, marketing and service provision to new concerned groups .

Introduction to Electric Power Systems

Commercial use of electricity began in the late 1870s when the inventive genius of Edison (Fig. 1.1) brought forth the electric incandescent light bulb. The fi rst complete electric power system was the Pearl Street system in New York, which began operation in 1882 and was actually a DC system with a steam-driven DC generator. With the development of the transformer, polyphase systems, and AC transmission, the fi rst three-phase line in North America was put into operation in 1893. It was then found that AC transmission with the help of transformers was preferable because DC transmission was impractical due to higher power losses. With the development of electric power systems, interconnection of neighboring electric power systems leads to improved system security and economy. However, with the advent of interconnection of large-scale power systems, operation, control and planning of such systems become challenging tasks. With the development of digital computers and modern control techniques, automatic generation control (AGC) and voltage and reactive power control techniques have been introduced to operate and control modern large-scale power systems. Load fl ow solution has become the most frequently performed routine method of power network calculation, and can be used in power system planning, operational planning, operation control, and security analysis. With the advent of interconnected large-scale electric power systems, new dynamic phenomena, including transient stability, voltage stability, and low-frequency oscillations, have emerged. With the development of an electricity market, electricity companies engage in as many transactions in one hour as they once conducted in an entire day. Such increased load demand along with uncertainty of transactions will further strain electric power systems. Moreover, large amounts of decentralized renewable generation, in particular wind generation, connected with the network will result in further uncertainty of load and power fl ow distribution and impose additional strain on electric power system operation and control. It is a real challenge to ensure that the transmission system is fl exible enough to meet new and less predictable supply and demand conditions in competitive