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Hybrid Control of DG to Mitigate Voltage Variation

Hybrid Control of DG to Mitigate Voltage Variation. Aristides Kiprakis Dr Robin Wallace University of Edinburgh, UK. Automatic Voltage / Power Factor Control (AVPFC). Active exchange between constant voltage and constant Power Factor (PF) modes Operates in a defined voltage / PF envelope

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Hybrid Control of DG to Mitigate Voltage Variation

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  1. Hybrid Control of DG to Mitigate Voltage Variation Aristides Kiprakis Dr Robin Wallace University of Edinburgh, UK

  2. Automatic Voltage / Power Factor Control (AVPFC) • Active exchange between constant voltage and constant Power Factor (PF) modes • Operates in a defined voltage / PF envelope • Increases exported energy • min disconnection period from over-voltage • Can provide voltage support • Low cost implementation

  3. Research Updates - I • Combined AVPFC & Voltage Regulator (VR) • major increase in allowable generator capacity • VR under MVAr flow control mode rather than Line Voltage Rise Compensation mode • Developed controller operating at continuous PF that increases exported energy • Fuzzy controller observes the terminal voltage and adjusts the PF set-point accordingly

  4. Research Updates - II • DG capacity was further increased by applying similar fuzzy controller to governor • Can also be combined with a Voltage Regulator to increase DG capacity even more

  5. Technology Availability • Developed several potential solutions • Proof of Concept models being built to prove feasibility • However… • generator manufacturers must implement them • plant developers must use them and, ultimately, • DNOs need to allow their use in the network

  6. CIRED 2003 • This work is part of a larger ongoing programme at the University of Edinburgh • Papers presented at CIRED • 4.44 - Intelligent generator control • 4.62 - Domestic CHP • 4.63 - Optimal accommodation of DG

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