Evaluating business models for microgrids: Interactions of technology and policy

Policy makers are increasingly focused on strategies to decentralize the electricity grid. We analyze the business model for one mode of decentralization-microgrids-and quantify the economics for self-supply of electricity and thermal energy and explicitly resolve technological as well as policy variables. We offer a tool, based on the Distributed … [Read more...]

Solar Plus Storage

There is a lot of talk about solar plus storage. Yet, it's important to know that by adding energy storage with a DC-to-DC converter you can maximize production & profits of installed North America PV base. Traditional storage plus solar (PV) applications have involved the coupling of independent storage and PV inverters at an AC bus, or … [Read more...]

Solar Plus Energy Storage

Solar is good, yet solar plus energy storage is great. However it is important to understand the options for adding energy storage if you want to maximize energy production and revenues from utility scale PV arrays. North America currently has over 20 GW of installed utility-scale PV generation with 2016 seeing the largest amount of PV installed … [Read more...]

Microgrid Energy Storage Beyond Four Hours

This paper aims to capture and foster current thinking on new and emerging use cases for microgrid energy storage, and in particular the growing need to combine energy and power applications into a single flexible and valuable long-duration storage asset. This market evolution is significant because it increasingly requires storage asset … [Read more...]

Lessons Learned Implementing an IEC 61850-based Microgrid Power- Management System

A North American oil refinery recently improved on-site power system reliability by installing a new utility ring-bus substation, a new utility interconnect substation, four new medium voltage distribution switchgear lineups, and separating two on-site 14.9 MVA cogeneration units onto dedicated buses in our management system . The refinery also … [Read more...]

Test & Implementation Framework for IEC 61850-based Microgrid Power Management Systems

Test the Solution  - We carefully planned the FAT to verify secure microgrid power management system operation in normal operation for the design contingencies and under the variety of failure and equipment-outage scenarios identified earlier. Each individual device was power cycled under normal, non-fault conditions. Communication channels were … [Read more...]

Protection, Control, Automation, and Integration for Off-Grid Solar-Powered Microgrids in Mexico

In 2012, Comisión Federal de Electricidad (CFE), the national Mexican electric utility, provided electric service to 98.11 percent of the country.  However, rural communities in Mexico (mainly isolated indigenous communities) still lack electric service. Conventional electrification is neither practical nor affordable for these communities that are … [Read more...]

Implementing a Microgrid Using Standard Utility Control Equipment

Recent weather events have proven that a single storm can cause billions of dollars of damage to the electrical power grid as well as significant power outage-related costs. As a result, utilities across the United States are working to make their microgrid services more resilient. This alone is a challenge, but some utilities also face state-level … [Read more...]

Solar Powered Microgrids on Small Islands

solar powered microgrids

Today, the majority of Small Island Developing States (SIDS) rely on imported diesel fuel to generate electricity on the islands.1 This reliance on diesel exposes SIDS to multiple challenges. First, the fuel must typically be transported great distances at great expense and the resulting electricity tariffs can be staggeringly high. In 2010, for … [Read more...]

NRG: Renewable Energy

NRG Renewable Energy

Attention and promise is one thing – true growth and value is another. Today, renewable energy has clearly landed on the second half of this equation. Once the domain of well-meaning early adopters, renewable approaches now involve a broader array of practices, products and technologies put in place by an ever-expanding roster of ROI-driven … [Read more...]