What Energy Harvesting Means to Smart Grid and M2M Sectors

New terms and jargon sometimes appear over time. “Sustainable” is one example. From a shorthand description of smart, long term practices applied to fisheries and agriculture to thoughtful consumption embedded into modern society, it has achieved jargon status.

The term, and its conceptual basis is now migrating into electronic component power technologies and designs. Self-sustainable operation means that whatever the device or function, it is self-powered, and that has extraordinary possibilities for the Smart Grid and M2M sectors. Just a few short years ago, embedded sensing and communications functions in devices created insurmountable engineering challenges in terms of how to power those devices. No matter how cleverly chip manufacturers reduce energy consumption – there’s still a requirement for some energy. That energy source was either a wired connection to the grid, or batteries. There have been advances in battery technologies at both the micro scale to utility scale, but without an ability to recharge batteries, there is a lifecycle limitation that culminates in battery or device replacement. That limitation in turn impacts the potential of innovative M2M applications in Smart Grid, Smart Infrastructure, and verticals like health.

There’s new research underway that can unlock the potentials for the Smart Grid and M2M sectors. It builds on energy harvesting research, but has the objective of completely eliminating the need for a wired power delivery or battery replacements in devices. The best phrase to describe this growing field of research is energy self-sufficiency. Energy self-sufficiency will be a term used with increasing frequency in the Smart Grid and M2M sectors.

There are a number of promising sources of energy that can be used to deliver energy self-sufficiency such as solar, piezoelectric (kinetic forms like vibration), and thermal energy. There are pros and cons to each of them, and they are already deployed in chipsets – sometimes in combination for power provisioning. But electromagnetic waves can be harvested too – a concept first proposed by Nikola Tesla and Heinrich Hertz over a century ago.

There’s no shortage of ambient wireless or radio frequency (RF) activity around those of us living in developed economies. In fact, we’re practically marinating in electromagnetic waves. Interesting energy self-sufficiency research includes both near-field and far-field applications that harvest TV, cellular, and Wi-Fi signals. Other research continues to build knowledge on optimal operation modes for power-up, sleep, and active states of energy self-sufficient devices.

These technologies may not add up to powering devices like smart phones completely without grid connection, but they may extend the time between needed connections to grids. But more importantly for the Smart Grid and M2M sectors, these technologies may power sensor platforms in a broad range of applications and increase the energy harvesting potential of solar panels that can also perform as hybrid RF harvesters. It’s an intriguing expansion of the green revolution in electronics.

For utilities, this can have significant impacts on projections for future grid-delivered power and in opportunities to apply more “standalone” sensing and control mechanisms into operations. That second impact also translates into new possibilities for Smart Infrastructure applications – particularly where water grids are concerned. Without a doubt, energy self-sufficiency in sensing and communications devices should have communications service providers and M2M application providers cheering as conventional technology constraints decrease and their market opportunities grow.


Energy Data Privacy Risks – What You Don’t Know Can Hurt You

Wednesday is Data Privacy Day in the USA, and it should receive heightened awareness after the recent Sony Pictures cyberattack. While media attention focused on cybersecurity weaknesses, privacy is the natural consequence of good cybersecurity. Security – cyber and physical – is a strategy that ensures a privacy outcome.

Unfortunately, determined cyberattackers or the deliberate or careless actions of current or former employees can defeat the best cybersecurity and physical security systems. Mandatory privacy policies and protections minimize the risks that sensitive data will be exposed – whatever that data might be. Sensitive data such as social security numbers, bank account information, and personal health records are managed to protect privacy. Utilities already manage sensitive data too, but need to prepare for significant increases in privacy risks.

Sensors are gathering more and/or new types of data. Inexpensive data transmission and storage makes it possible to handle new volumes, varieties, and velocities of data. Smart Grid technologies can deliver new granularity in time-stamped data about consumer use of electricity, gas or water. More M2M technologies can generate location-based data that accurately maps activity over the course of a day.

All these converging technologies increase data privacy risks, and make the publication of Data Privacy for the Smart Grid* very timely. It’s a key reason I helped write it. The Smart Grid delivers a myriad of benefits to utilities and consumers, but it also creates new risks and new concerns about data privacy. Energy usage data is invaluable to help intelligently manage energy and reduce utility operational costs and consumer costs. Privacy risks emerge in questions of how that energy usage data is used, shared, stored and otherwise accessed.

Utilities have prominent roles in the collection of energy usage data, but they may not be the only entities gathering, receiving, storing, or using that data. In the future it is very likely that businesses other than utilities may manage generation assets or water conservation equipment, sell electricity, or collect energy usage data directly from consumers. The variety of potential players coupled with new services and technologies can easily confuse everyone with blurry responsibilities for privacy protection and more exposure risks. Will consumers always know the “chain of data custody” for their energy usage data? The answer is no, and that has serious policy, process, and training implications for utility executives and vendors of solutions capable of gathering, transmitting, and using this data.

This is definitely a situation where what you don’t know about privacy risks can hurt you – in the forms of criminal or civil litigation and financial penalties, bad publicity, lost goodwill, and reputation damage. What steps should utilities and vendors take to protect the privacy of their customers’ energy usage data and the fallouts of failure? The answers are the focus of next week’s article.

*  Published by Taylor and Francis Group. Co authors: Christine Hertzog and Rebecca Herold. ISBN: 978-1-46-657337-6. Available for pre-sale now.