In the event a microgrid were to be de-energized due to a grid outage, or enter a “black out” state, Dynapower has developed a simple and reliable approach to black starting or “restarting” the microgid’s energy storage inverters.
Since 1963, Dynapower has been a leader in the development and production of purpose-built solutions in the power conversion industry.
Our vast array of products–which include energy storage systems, inverters, DC converters, rectifiers and custom transformers–are designed and built in our 150,000 square foot vertically integrated facility right here in South Burlington, Vermont.
The video below provides a great insight into who we are and what we’re about:
When DC voltage is applied to the input of an energy storage inverter, large inrush currents will occur as the DC bus capacitance will initially appear as a short. Without the use of a pre-charge unit, these inrush currents can damage the batteries, the capacitors and IGBTs.
At Dynapower, we refer to engineering upgrades as a term used to describe putting a non-original part in a machine as opposed to a repair—which refers to a like part for a like part exchange. An easy way to understand this is if you blow out your tire and replace it with the exact same tire it’s a repair whereas purchasing a higher end tire would be an upgrade.
In the advanced energy storage market, lithium-ion batteries remain the primary battery technology for energy storage systems. They are used in a variety of storage applications from energy storage sited at commercial and industrial facilities to residential energy storage to multi-megawatt utility-scale energy storage installations.
Despite lithium-ion batteries’ market dominance, they aren’t the only available option. Dynapower has deployed our energy storage inverters alongside other battery technologies including flywheel systems and flow batteries. Here we take a deeper dive into how these batteries work.
First, let’s run through the characteristics of these two classes of rectifiers. A silicon-controlled rectifier (SCR) is a semiconductor power supply that meters electricity by opening electrical “valves,” working together as a team, to rectify electricity. The longer the “valve” is open, the higher the voltage leaving the rectifier will be.
SCR rectifiers are variable voltage DC power supplies that are low frequency, high ripple systems. These systems are rugged and have a history of durability in the market – a number of our customers have systems running after 40 or 50 years. They regulate and react steadily, carry a lot of power in big copper windings, and are fairly easy to troubleshoot with large, easy-to-identify components.
Dynapower is proud to announce that its DPS-500 DC-to-DC converter for solar plus storage has been certified for IEC 62109 from TÜV Rheinland. It is the first DC to DC converter designed for utility-scale solar plus storage applications to receive this important safety designation.
“Dynapower designs and builds the safest, highest performing energy storage inverters and DC to DC converters available today. This is further validation of the quality and safety of our energy storage solutions,” said Tim Varhue, Energy Storage Product Manager.
Massachusetts has become the first state in the nation to incentivize behind-the-meter energy storage for commercial and industrial customers. The recent incentive–ordered by the Massachusetts Department of Public Utilities (DPU)–would allow utility companies to pay customers who agree to use their energy storage systems during peak electricity demand hours to reduce their load on the grid..
The program is being offered through an electric utilities and energy efficiency provider collaborative called Mass Save. The programs are designed for Massachusetts utilities including National Grid, Eversource, Berkshire Gas, Blackstone Gas Company and other smaller utilities in the state.
Rectifiers can last decades before needing replacement. But not all parts used to build this essential piece of equipment have the same life expectancies. Some circuit boards or semiconductors degrade as part of their natural life cycle, and will need to be replaced several times in the rectifier system’s lifetime. Leaving parts at their end of life installed in the rectifier can lead to:
Loss of efficiency
Loss of communication capabilities
Loss of operator control
Injury or even death
When any of these conditions arise, companies need to assess the source of the issue and decide the best course of action. Customers have a variety of options to maintain their equipment. Some are by choice, and others by necessity.