tehonsiirron

Tehonsiirron is a term used in Finnish energy engineering to describe the controlled transfer of electrical power between subsystems within a power system, or between energy storage units and loads. The concept covers both steady‑state power transfer and transient events, with a focus on maintaining stability, reducing losses, and ensuring reliable operation of interfaces such as converters, interties, and transformers. It is often applied to AC and DC links and to grid interfaces involving renewable generation or battery storage.

Etymology and usage: The word is formed from teho (power) and siirto (transfer). Tehonsiirron is the genitive form used in compound phrases such as tehonsiirron optimointi (power transfer optimization). The term is common in Finnish technical writings and is sometimes used in English-language summaries, though it remains relatively uncommon outside Finland.

Scope and components: Tehonsiirron characterizes the set of interfaces that carry active and reactive power between nodes in a network, including power-electronic converters, tap-changing transformers, DC link controllers, and energy-storage devices. Control loops may rely on phasor measurements, frequency and voltage regulation, and tariff or grid-code requirements.

Techniques and control: Approaches include optimization of active power flow, reactive power support, and converter control strategies such as vector control, phase-shift modulation, or high-level energy management. Safe operation requires synchronization, protection coordination, and stability analysis for both steady state and during contingencies.

Applications and relevance: Tehonsiirron concepts apply to transmission-distribution interfaces, microgrids, renewable integration, and vehicle-to-grid systems, where efficient and reliable power transfer affects performance and economics.

Challenges and outlook: Ongoing research addresses dynamic stability, fast topological changes, loss minimization, and cyber-physical security, as well as international standards for measurements, interconnection, and control interoperability.