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Converter Fed Microgrids : Challenges & Solutions

Converter Fed Microgrids : Challenges & Solutions. Microgrids: Power Network with Loads and DGs that operate as a Single Controllable System. Presenter: Charles Sao, PhD Candidate, ECE Dept., U. of Toronto Contact Info: cksao@ieee.org Supervisor: Prof. Peter Lehn. Grid Connected Mode.

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Converter Fed Microgrids : Challenges & Solutions

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  1. Converter Fed Microgrids: Challenges & Solutions Microgrids: Power Network with Loads and DGs that operate as a Single Controllable System. Presenter: Charles Sao, PhD Candidate, ECE Dept., U. of Toronto Contact Info: cksao@ieee.org Supervisor: Prof. Peter Lehn Grid Connected Mode • Current Mode Control: Dynamic Current Control • Synchronized to PCC Voltage: Fast P and Q Control • Grid Provides PCC Voltage and Frequency Control

  2. Microgrids: Challenges Intentional Islanding Mode • Identical Topology and Control as Grid Connected Mode • Lose Control of PCC Voltage and Frequency • PQ Supply does NOT equal Demand Operate Like Conventional Gen? • Voltage Source with Regulated Voltage & Frequency • Frequency & Voltage Droop to Share Real & Reactive Power • No Dynamic Control of Current– Risk Burn-out (or) • Conventional P & Q Control - Slow

  3. Solution & Results • Identical Topology as Grid Connected Mode • Regulates PCC Voltage and Frequency • Fast Control of Current and Power to meet Demand

  4. Load Sharing of 2 Converters

  5. Grid Connection Transient

  6. Islanding Transient

  7. Summary Project Summary: • Identical Controls in Island & Grid Connected Modes • Regulate V & Freq., Manage P and Q • Dynamic Current Control to Protect Converters Other Research Projects: • Autonomous Load Sharing of Voltage Source Converters • Computing Lightning Exposure of Wind Turbines (with Dale Dolan) • Benchmark System for Time Domain Simulation of D-STATCOMs Selected Industrial Projects (at BC Hydro): • Stability study of the North Coast 500 kV Line • Effect of non-linear loads on reactive power metering • CEA Power Quality Survey Coordination in BC

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