Low-loss solution for Estonian communication power systems

Minimizing technical losses in Estonia's power systems can be achieved through high-voltage infrastructure, synchronized condensers, smart grid technologies, and optimized operational practices.

High-Voltage Transmission and Efficient Infrastructure

Estonia's transmission network includes 330 kV underground AC cables and high-capacity transformers, such as the 126-ton transformer at the Kiisa battery park, which are critical for managing large power flows with minimal losses . Using high-voltage lines reduces resistive losses over long distances, as power losses are inversely proportional to the square of the voltage. Additionally, modern underground and undersea cables connecting islands and cross-border interconnections (e.g., Estlink 1 and 2 to Finland) improve energy transfer efficiency and reduce line losses .

Synchronized Condensers (SynCons) for Grid Stability

To maintain frequency and voltage stability, Estonia has deployed synchronized condensers, which provide rotational inertia to the grid and help stabilize voltage fluctuations caused by intermittent renewable sources . By stabilizing the grid, SynCons reduce the need for reactive power compensation and prevent energy dissipation that would otherwise occur during voltage instability.

Smart Grid and Operational Optimization

Reducing technical losses also involves smart grid technologies and optimized operational practices. This includes real-time monitoring of line loading, voltage levels, and transformer performance, allowing operators to minimize resistive and dielectric losses . Advanced control systems can dynamically reroute power flows, balance loads, and integrate distributed energy resources efficiently, further lowering losses.

Renewable Integration and Energy Storage

The integration of battery storage systems, like the Kiisa facility, allows for peak shaving and load balancing, which reduces losses associated with overloading lines and transformers . Properly coordinated inverter-based systems can store excess renewable energy and release it when needed, minimizing curtailment and transmission losses.

Material and Component Improvements

Using low-resistance conductors, high-efficiency transformers, and advanced insulation materials can significantly reduce technical losses in both transmission and distribution networks . Regular maintenance and upgrading aging infrastructure also contribute to lower energy dissipation.

Strategic Planning and Cross-Border Interconnections

Estonia's participation in the Baltic Energy Market Interconnection Plan (BEMIP) and integration with the European grid allows for optimized cross-border power flows, reducing congestion and associated losses . Coordinated planning ensures that electricity is transmitted along the most efficient paths, leveraging regional resources while minimizing dissipation.

Summary

A low-loss solution for Estonian communication power systems combines high-voltage infrastructure, synchronized condensers, smart grid technologies, energy storage, and material improvements. These measures collectively reduce resistive, reactive, and dielectric losses, enhance grid stability, and support the integration of renewable energy, aligning with Estonia's goals for a sustainable and efficient power system .