Finding
Shore power is the growth market for frequency converters: ships mostly run 60 Hz, most of the world's ports sit on 50 Hz grids, and Europe now requires shore power at major ports
The EU's Alternative Fuels Infrastructure Regulation requires shore power for large container and passenger ships at core TEN-T ports by 2030, and most of those berths need a 50-to-60 Hz static converter rated in megawatts. ABB, Siemens, Schneider and Cavotec lead in Europe; Chinese ports have installed shore power at scale under national mandates.
Static converters - a rectifier, DC link and inverter at the new frequency - have replaced most motor-generator sets. Rotary sets survive where galvanic separation, inertia or legacy compatibility matter. Japan's grid is split at the Fuji River: 50 Hz in the east, 60 Hz in the west. Converter stations at Shin-Shinano, Sakuma, Higashi-Shimizu and Hida-Shinano link the two at about 2.1 GW, with expansion to 3 GW under way; the 2011 Tohoku shortage showed how thin that link was.
Germany, Austria, Switzerland, Sweden and Norway run rail on 16.7 Hz, fed by dedicated generators and by large static converters from Siemens and ABB; Amtrak's Northeast Corridor south of New York still uses 25 Hz. Airports supply parked aircraft with 400 Hz ground power (ITW GSE, JBT AeroTech, Guinault, TLD) so jets do not burn fuel in their auxiliary power units. Labs use programmable AC sources from Chroma, Keysight, AMETEK and China's ITECH to test products against any grid.
Types
Frequency converter types
| Type | Approach | Strength | Best fit |
|---|---|---|---|
| Static solid-state | Rectifier, DC link, inverter at the target frequency | Efficient, compact, controllable | Industrial, export equipment, test, shore and ground power |
| Motor-generator set | Motor at one frequency drives a generator at another | Galvanic separation, inertia, rugged | Legacy plants, some rail and naval supply |
| Shore power converter | MW-class static converter with isolation transformer (IEC/IEEE 80005-1) | Lets ships switch off auxiliary engines at berth | Container, cruise and ro-ro terminals |
| Aircraft ground power unit | 400 Hz, 115/200 V output from the local grid | Cuts APU fuel burn and noise at the gate | Airports, hangars, military bases |
| Rail traction converter | Grid 50 Hz to 16.7 Hz or 25 Hz single-phase | Feeds legacy low-frequency rail networks | DB Energie, OBB, SBB, Amtrak |
| Programmable AC source | Arbitrary voltage, frequency and waveform | Simulates any grid for testing | R&D, certification, product validation |
Uses
Where frequency conversion is needed
| Domain | Why conversion is needed | Suppliers |
|---|---|---|
| Ports and shore power | 60 Hz ships at 50 Hz ports; emissions rules at berth | ABB, Siemens, Schneider, Cavotec, NARI (China) |
| Airports | Aircraft systems run 400 Hz | ITW GSE, JBT AeroTech, Guinault, TLD |
| Railways | 16.7 Hz and 25 Hz traction networks | Siemens, ABB |
| Grid interties | Linking 50 Hz and 60 Hz grids (Japan) | Hitachi Energy, Toshiba, Mitsubishi Electric |
| Export machinery | Machines built for one grid deployed on another | ABB, Danfoss, Yaskawa, Inovance |
| Test labs | Products validated against foreign grids | Chroma, Keysight, AMETEK, ITECH |
Sources
Sources and scope
- Scope
- Frequency Converters
- Sources
- EU AFIR (Regulation 2023/1804); IEC/IEEE 80005-1; Japanese utility and OCCTO disclosures; supplier disclosures
- Updated
- October 2026