Abstract: Dual-port grid-forming control enables simultaneous ac and dc voltage regulation for modular multilevel converters (MMCs) connecting the HVDC transmission line to the ac network. However, ...

The Richland Soil and Water Conservation District is collecting milkweed seed pods to help support the declining monarch butterfly population. Milkweed is the only plant monarch butterflies will lay ...

KOREATOWN, LOS ANGELES (KABC) -- It's apparently the latest trend in Los Angeles. Homeless encampments aren't just popping up in parks and sidewalks anymore. Now, they're taking over some private lots ...

A tropical wave is brewing in the Atlantic Ocean. A tropical wave is brewing in the Atlantic Ocean as another tropical system drifting over Florida has already drenched the state with heavy rainfall.

North Dakota is definitely not known for its trees, but history has shown that it is reminiscent of the vast grasslands. To many of us, they seem very dull and unexciting, but in the fall, the colors ...

The S&P 500 keeps getting more expensive. Some investors think there is a bubble in AI stocks. Emerging technology stocks, on the other hand, look unjustifiably expensive. Some parts of the market are ...

Researchers in the United States have created a droop control strategy for grid-forming inverters that purportedly improves power system frequency stability. By using an exponential active ...

Many of the most interesting bodies in our Solar System aren’t planets, but the moons that orbit them. They have active volcanoes, hydrocarbon oceans, geysers, and moon-wide oceans buried under icy ...

Valerie Mack stands in front of her apartment building in Minneapolis. Mack says delayed repairs and other maintenance problems in her building have prompted her to organize her neighbors to form a ...

Not including animals like the bald eagle or Eastern bluebird, the monarch butterflies have garnered much interest in people. This beautiful insect with a 3½-inch to 4-inch wingspan has seen its ...