Connected Energy

Abstract

The traditional power grid is built robust with high security margins and long time constants. The electric power system is a capital heavy industry with large investments and long payback times. The whole business structure is built around slow progress in legislation, permitting, hired workforce, technology and investments.

The traditional usage of electricity that the grid is built for is now getting challenged. The usage of electricity is no longer the highest during a cold winter night and can now, because of extended use of electricity, be higher during a warm summer day. The extended usage, when people for example charge their electric cars, creates a challenge that the electric grid is not built to handle and makes the traditional way insufficient. There is also an increased usage of photovoltaic panels that affects the power grid when the consumer produce more electricity than needed in their households. That means that not only does the expanded use of electricity during the warm summer days challenge the traditional grid but also the need for electrical energy to go the other way. The rapid growth of technology in the electric sector makes it essential for the transformers to be able to handle new loads. The new needs that have arisen mean that the transformers are facing unknown local conditions. Is the secondary transformer placed in full sunshine or not; what is the unbalance and harmonics in this grid location; what are the proper losses of the 30 year old transformer?

Click here to see a PDF presentation of the project.

Goals

The Connected Energy project aims at establishing a cost-effective mobile-based pilot architecture for measurement in the approximately 140 000 secondary substations around Sweden. The project has deployed 10 pilots in the Stockholm area and have been collected data from these pilots for 3 months. This collection has provided an estimate of the amount of data and exhibited different strategies to ensure operation over longer periods. Using the pilot's costs, the project has been able to provide an initial understanding of the different business models around the monitoring of the power grid.

Results

The monitoring of a civilisation critical system poses specific demands on the system, especially when the infrastructure is spread across the country. The project has shown that safety during installation, but also security of the data collection and communication are critical to the fulfillment of these requirements. Disconnection between the operating and monitoring systems and techniques for ensuring data integrity are also particularly important. To keep maintenance and installation costs down, batteries with years of operating life and integrated sensors are preferable.

Participants

ABB worked with developing and integrating sensor technology with mobile network access modem suitable for the intended application.

EON acted user and visualized results in supervision central as well as participate in system integration work.

Ericsson proposed and reviewed system solutions, mobile access solutions, data analysis and anomaly detection. Ericsson also analysed the application requirements for system and communication solution.

RISE SICS acted project manager and scrum master by Emmanuel Frécon. RISE SICS lead the integration work and made necessary system development to be deployed in RISE SICS ICE. Dissemination and exploitation was also managed by RISE SICS.

Vattenfall acted user and visualized results in the supervision central as well as participated in system integration work.