News & Blog

As solar energy becomes a bigger part of the generation mix, grid operators need better visibility of how much solar power the system is producing. Then they can optimally dispatch solar and other energy sources to balance the generation and demand. Improving solar forecasts will allow the electric grid to be more flexible and adapt…

Power system operators and network owners rely on power system modelling and simulation to maintain secure operation of power systems in real time. Conventional power system simulation models, typically referred to as root-mean square (RMS) models, have been used worldwide by all major network owners and system operators for predicting the response of power systems…

For many years we have been talking about the ambitious Danish goal of 50% of electricity supply from wind power by 2020 and the vison of independence from fossil fuels for the country by 2050. Today electricity generation based on renewable energy sources (RES) constitutes almost 2/3 of the demand. We are now very close…

Distribution-connected PV inverters with advanced functionality, also known as “smart inverters”, have become mainstream in recent years.  Analyses and field experience have demonstrated that smart inverters are a cost-effective alternative to achieve higher penetration of PV in distribution circuits and at the system level.  However, the full potential of smart inverters is yet to be…

As power systems around the world have integrated wind and solar power, a crucial first step is to develop or procure a short-term forecasting system to support operations. Right now, anyone with significant penetration of variable energy resources (VER) that we’re aware of has some kind of a forecasting system for these resources. There is…

One critical element of a successful transformation of the grid with a high proportion of solar and wind power generation is the maintenance of power system flexibility. A flexible power system reliably supplies all customer energy demand at different time scales, from the very short to the long term — while managing the variability and…

ISO New England (ISO-NE) has witnessed rapid adoption of behind-the-meter photovoltaics (BTM PV) in recent years, with roughly 160,000 systems totaling almost 3 gigawatts (GW) of nameplate capacity now installed across the region, and approximately 7 GW total anticipated by the end of the next decade. For a system with a 2018 summer peak load…

It’s about load. In our long-term reliability assessments, we tend to think of peak demand as a fixed quantity. We adjust it up for new loads such as EV growth, or down for demand response and DER growth, and we adjust it for weather. We consider the variability from wind, solar and hydro during that…

At night, in a large open field, one can chance upon hundreds of individual blips of light from fireflies. As time progresses, it has been observed that these blips of light start synchronizing with each other, first in small clusters, then as larger groups until all fireflies are in synchronism and order appears to emerge…

New technologies are rapidly being connected to the electricity system. The connection of these technologies (think wind, solar, storage, etc.) needs to be planned to make the whole electricity system work. The planning of electricity systems has been a relatively traditional process of studies and modeling. However, in recent years, a change has occurred, a…