Synchroinverters are a special kind of smart inverters that mimics a synchronous generator and are able to avoid any grid frequency fluctuations and fault analysis. They respond dynamically and autonomously to changes in the grid by the means of software and providing an inertial response in an extremely short time.
These devices are still in the research but are considered a viable option and solution for integrating renewable energy.
In early December 2021, The U.S. Department of Energy (DOE) and Israel’s Ministry of Energy (MoE) have agreed to support for development of new synchroinverters.
The company claims that the devices are interoperable among themselves without compromising the expected individual performance. The grid provide grid stability service in less than 16.67 milliseconds.
Just like a generator, the inverter will react the same way to any change in the grid which will improve grid stability. The new inverter technology will rely on an agnostic algorithm developed by Synvertec that can be embedded into any three-phase inverter. The algorithm will be integrated into Rhombus Energy Solutions’ 125 kW bi-directional inverter, which the manufacturer describes as a device that can support power flow to and from the grid, allowing integration with power storage and non-grid renewable power resources. The device can be used either as a grid-tied, utility-interactive inverter or as a PV inverter.
125kW inverter is being used for the fast charging unit developed by Rhombus. In grid-tied operation, the inverter current breaker is closed and battery get to discharge mode, injecting current in grid to support critical load.
The inverter also features an integrated standalone cooling unit, DC over-current protection, DC over-voltage protection, grid failure detection and protection, AC overcurrent protection, enclosures for over-temperature warning and under-temperature handling, and a hardware thermal protection circuit. “The 125 kW platform is a mass-production unit deployed across the USA and Canada and has a proven track record,” the company stated. “At its core, the switching power stage has been in production for more than 20 years and there are hundreds of units deployed in various configurations that are still in operation.”
Reference: PV Magazine