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Second Generation Active Network Management on Orkney

Second Generation Active Network Management on Orkney. Bob Currie Smarter Grid Solutions. Orkney Smart Grid. Challenge Cost-effective alternative to grid upgrades to provide connections for new renewable generators Approach

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Second Generation Active Network Management on Orkney

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  1. Second Generation Active Network Management on Orkney Bob Currie Smarter Grid Solutions

  2. Orkney Smart Grid Challenge Cost-effective alternative to grid upgrades to provide connections for new renewable generators Approach • Active Network Management: managing generators against power flow constraints • Multiple generators behind multiple constraint locations Benefits • 12 Generators and 6 constraint locations deployed to date • Connected almost 20 MW new renewable generation capacity to 33 kV grid previously considered to be full • Estimated savings of £30 million

  3. Further Development • Communications • Real Time Ratings • Voltage Management • Energy Storage • ANM Platform • Demand Side Management • Small Scale Generators • Distribution State Estimation

  4. Operational System

  5. Communications Failure Causes Curtailment Comms Lost Comms Restored

  6. Real Time Thermal Ratings • Exploit variations in meteorological conditions • ANM provides the means to act on real-time ratings • Allows networks to be utilised more fully, reducing constraints under trial on Orkney

  7. Voltage Management • Relieving power flow constraints with RTR means voltage can become the binding constraint • Dynamic voltage limits • Line drop compensation • Control of P and Qbeing explored

  8. Energy Storage • SSEPD has created the Orkney Storage Park • Dedicated to energy storage devices • Third-party organisations are invited to install their own devices and test a variety of potential uses • Provides a further tool to allow the ANM scheme to reduce curtailment of the Orkney generators

  9. Platform Upgrade • Server-based application container to host deterministic applications: predictable control of field devices in response to real-world events • Deployed centrally or distributed to make best use of existing investments, available data and communications • Supports substation and industry communications protocols (IEC61850, DNP 3.0, Modbus) • Integrates easily to existing infrastructure (e.g. FEP, RTU, IEDs, SCADA and data historians) • Shares in-memory real-time database with sgs core • Issue set points and schedules to controlled devices • Operates in synchronisation with applications hosted on sgs core • Provide autonomous fail-safe functions • Can be implemented on dedicated hardware or as an application

  10. Demand Side Management • Several of the generator connections made possible by the ANM scheme are community-owned and supported by Community Energy Scotland (CES) • Supports and promotes all forms of sustainable energy in communities across Scotland. • CES now exploring demand side management • New electrical demand that can be controlled exploit more fully the available energy

  11. Small Scale Generators • Previously, generators smaller than 50 kW were allowed to connect without being subject to ANM control • However, several MW of new capacity has connected • Each has a small impact but, in combination, these generators are ‘eating’ into the constrained capacity • Resulting in the larger, ANM-controlled generators suffering additional curtailment

  12. Distribution State Estimation • DNOs need greater visibility of networks • Makes possible new forms of ANM • Has to be balanced against the cost of additional measurement and telemetry • Distribution state estimation (DSE) offers extended visibility • Reduced set of actual measurements • Augmented with pseudo-measurements • Enhance operation of the ANM scheme • More robust to loss of measurements • Facilitate third generation developments

  13. Conclusions • Orkney ANM the first of its kind • Second generation technologies and initiatives • Demonstrates how an established project can provide the foundation for further work • Important to note the collaborative nature of the project • SSEPD has been supported by the local government, communities and generation developers • New developments seek to enhance the existing scheme and exploit more fully the available capacity on the network • Testing a range of techniques with much broader applicability

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