Modeling and HIL Simulation of Modular Multilevel Converters

The proposed internships will be aimed at developing advanced computer (software) and hardware platforms for simulation of modern power-electronic converter systems used in emerging electric power transmission systems. In particular, modular multi-level converter (MMC) simulations will be targeted. These converters are considered the primary candidates for dc systems used to integrate renewable energy sources into the existing grid. These two internships will develop functional models that can be readily used for the analysis and design of systems involving modular multi-level converters.

PMU Based Load Modelling and Validation Methodology

Load Modeling accurately has been a fundamental and critical subject for many years in power industry. Recently with the deployment of Phasor Measurement Units (PMU), real time data to
analyze the loads has become feasible. Previously, load modeling has been focused on using some models based on pre-assumed certain form of the models, as a consequence the
prediction error would be considerable. We propose to use techniques that do not need such assumptions, therefore it should promote the prediction accuracy of the analysis.

Spectroscopic optical coherence tomography for ageing assessmentof high voltage transformer insulation

We will develop an algorithm that uses subsurface images obtained by spectroscopic optical coherence omography (OCT), to estimate the remaining lifetime of high voltage transformer insulation paper. To allow uture almost instantaneous in-field estimation during transformer maintenance outages, this algorithm when sed with, e.g., a fiber-based spectroscopic OCT, should produce results in less than 5 seconds. Using existing ptical hardware, we will build a benchtop spectroscopic OCT setup to image both synthetically and in-field ged transformer insulation paper samples.

Probabilistic Evaluation of Transient Stability of Power Systems Containing Renewable Energy Sources

By incorporation of distributed power generation to passive distribution networks, these networks will change to active networks and the studies related to active networks should be considered for them. Disconnection of these networks from the upstream power system may let them operate in islanded mode (a micro-grid). One of the studies that should be considered is the transient stability. Due to the random parameters of micro-grids and active distribution networks, the most realistic method for transient stability analysis is the stochastic one.

Comparative study of approximate and rigorous approaches to lightning discharge through power system towers

The project performs comparative study of simplified and rigorous approaches to analysis of lightning strike discharge through complex 3D structures of the power line towers and their grounding systems. Simplified models of the commercial tools such as PSCAD and TFlash will be compared to the new rigorous electromagnetic model (EM) based on full-wave algorithms analysis.

Development of High-Performance Microwave Radio Network Systems with Broadband and Polarization Diversity Antennas to be Integrated with High-Speed Optical Fiber Networks

Objectives: Manitoba Hydro Telecom (MHT) has proposed the development of a state-of-the-art optical communication network using Reconfigurable Optical Add Drop Multiplexers (ROADM) employing Wave Division Multiplexing (WDM). MHT will use ROADMs compliant with currently established industry standards such as ITU G.709 and G.8032. ROADMs with WDM methods with 50 GHz channel spacing enable up to 88 wavelengths to be carried on a single optical fiber.

Dynamic Modeling with Empirical Data for Hydropower Decision Support

Long-term decision making strategic investment planning under the condition of great uncertainty is of great importance to power utilities such as Manitoba Hydro. A review of standard and existing planning methodologies will be the basis for identifying and testing new formal methods to support the definition of robust investment programme planning. This project will address the long-term decision making problem typically facing power utilities like Manitoba Hydro; using dynamic modeling, model filtering techniques, and practical data fusion.

Model Development for Manitoba Hydro Regulating Reserve Management

The main objective of this research is to calculate Control performance standards in an interconnected power system without running the time domain simulation. Using a faster approach which requires probability distribution of load change. PSCAD and PSSE simulation tools will be used to carry out the research. System identification technique will be used to estimate necessary transfer function models. These transfer function models will be used to generate data for the calculation purpose.

HVDC “Superline” for improved angular stabilityof AC-DC system

High Voltage DC Transmission (HVDC) is used for bulk power transfer over long distances. Manitoba Hydro system involves collection of AC power in the north where it is converted to DC and then transferred to southern Manitoba (approx 900km) where it is converted back to AC to feed consumers. Recently the problems of inter area oscillations have been reported in the system. Manitoba Hydro uses feedback signals such as frequency from the converter stations as control input to modulate power through HVDC links to damp these oscillations.

A novel passive wireless sensor for the measurement of AC/DC electric field in the vicinity of high voltage apparatus

The existing technologies used for monitoring the voltage and the electric field in the vicinity of the high voltage devices are bulky and expensive. On the other hand, maintenance of the monitoring devices requires specific safety precautions. In this research project, a small and inexpensive electric field sensor is proposed. They are passive and require no source of power. This eliminates the need of changing the batteries and direct contact to the high voltage apparatus. The interrogation system will be wireless that makes the distant measurement possible.