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Advanced Sensors for the Smartgrid

Advanced Sensors for the Smartgrid. How to deal with existing switchgear in Secondary Substations Authors: Aitor Arzuaga Jose Antonio Moreno Covadonga Coca . The Diversity of the Distribution Grid. The Grid has evolved over time, patchwork. Decades-old equipment.

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Advanced Sensors for the Smartgrid

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  1. Advanced Sensors for the Smartgrid How to deal with existing switchgear in Secondary Substations Authors: Aitor Arzuaga Jose Antonio Moreno Covadonga Coca

  2. The Diversity of the Distribution Grid • The Grid has evolved over time, patchwork. • Decades-old equipment. • Limited investment in distribution grids. • Different types of switchgear: Masonry Air Insulated Gas (SF6) Insulated Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  3. Voltage Sensors • Monitor voltage (magnitude / phase): • Transformer-based. • Dividers (capacitive, resistive). • Limitations: • Dimensions (existing space). • Installation. • Accuracy. • Parasitics. Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  4. Current Sensors • Monitor current in MV conductors. • Rogowski coils. • Fe Current transformers. • Fiber optics. • Limitations: • External conductor shielding. • Tradeoff installation simplicity vs accuracy. • Safety (open circuit). Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  5. PLC Coupling Devices • Couple PLC communications signal into MV lines. • Inductive couplers. • Capacitive couplers. • Limitations: • Frequency / bandwidth. • Impedance. • Security. • Installation complexity. Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  6. The road to Integration • Integration is the path to follow in existing MV distribution grids: • Lack of space in switchgear. • Installation time / cost. • Security (devices tapped into MV). • Enabler of Smartgrid in existing grid. • Types: • Voltage + current. • Voltage + PLC coupler. • Voltage + current + PLC coupler. Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  7. Conclusions • Different solutions exist with different levels of precision, cost and installation complexity. • The diversity of the MV grid requires a range of sensor solutions to cope with its diversity. • Sensors can be integrated to fit space limited applications, technically complex. • Precision requirements for analog measuments have to be carefully analyzed, tradeoffs made. Aitor Arzuaga – Spain – Session 1 Network Components – Paper 1091

  8. Thankyou!a.arzuaga@ziv.es

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