Showing posts with label reliability. Show all posts
Showing posts with label reliability. Show all posts

Friday, November 13, 2015

Brilliant Lecture by Chief Technologist Dr. Eugene Litvinov of ISO New England

Today we had the honor and privilege of hosting Dr. Eugene Litvinov, who is the Chief Technologist at the Independent System Operator (ISO) New England. Dr. Litvinov spoke in our UMass Amherst INFORMS Speaker Series, which is organized by the UMass Amherst INFORMS Student Chapter. The student chapter, some faculty, and I had the pleasure of touring ISO NE's facilities in Holyoke, MA  last spring and Dr. Litvinov was so fascinating that we were thrilled when he accepted our invitation to speak.

He attracted an audience from the Isenberg School of Management, the College of Engineering, and even folks from Physical Plant at UMass since we operate our own microgrid as well as other guests from the community. It was great to see so many PhD students and even MBA students in attendance on a Friday afternoon.

The title of his talk was "Challenges of the New Grid."

ISO NE ensures that the lights stay on in our region, that is, this organization ensures electric power reliability. It is also involved in wholesale trading as well as planning for electric power.

We began his visit with a delicious lunch at the University Club at UMass and were joined by Professor Erin Baker and two of her doctoral students. She is the PI on an NSF IGERT on wind energy. Also joining us was one of our PhD students from the Isenberg School.

The conversation at lunch was so interesting. We discussed issues of survivability, cybersecurity and the grid, renewable energy, internships, skillsets needed in this industry, and other topics and we made it to the seminar location jut in time.

The audience was eagerly awaiting Dr. Litvinov'a presentation.

I started the introductions and then our new Student Chapter President, Zana Cranmer, completed the welcome. We also noted that the student chapter last week at our INFORMS conference in Philadelphia had received the summa cum laude award from INFORMS. We had chocolate cake (to be eaten after the talk) and our award plaque displayed.
Dr. Litvinov mentioned how the grid consists of the eastern interconnection, the western interconnetcion, and that Texas is its own country.

He noted that ISO NE manages $11 billion in energy capacity a year, which is mind-boggling. Every second the monitoring of supply and demand of electricity takes place since electric power cannot be stored.

New challenges for our region include that a big percentage of the fuel is now natural gas and we don't have sufficient pipeline capacity to transport it (our region does not produce natural gas). This winter could be interesting, to say the least.

He noted that we now need different ways of controlling the system since it is much more decentralized than it has ever been. He spoke of offering customers different levels of reliabilty, which I found quite interesting.

He also noted that the transmission architecture is a mesh and the distribution architecture of the grid is radial. He emphasized the need for greater flexibility. I very much appreciated his emphasis on the importance of definitions whether they are for flexibility, reliability, survivability,  or even resilience. He spoke about risk-based optimization, which I thought was very cool, and noted robust optimization several times in his talk. I might add that Litvinov has collaborated with Dimitri Bertsimas of MIT Bertsimas spoke in our series a few years ago, as did his wife, Georgia Perakis, who had the same advisor at Brown University as I did (Stella Dafermos).  so I guess Bertsimas is my academic brother-in-law.

Dr. Litvinov  emphasized the importance of keeping the system in balance and to manage the uncertainty. I liked him saying that one needs to determine the largest set of uncertainty that can be handled without violating constraints and said that he has a paper on this, which I definitely want to read.

Dr. Litvinov also discussed that we are moving from coordinated control of the grid to cooperative control (hopefully) along with decentralized decision-making. He had visited Paris recently and viewed how electric power is managed there.
He  presented quite a few mathematical optimization models so it was great for the students to see how important mathematical programming and optimization are in this critical infrastructure sector.

His lecture was brilliant and so impressive.

The questions that followed demonstrated the interest of those who attended. There were questions on renewable energy, what his vision for the grid would be for 2030, and even cybersecurity (a growing group at ISO NE).

Dr. Litvinov stayed to answer more questions and was very generous with his time and, given his reponsibilities, we are truly grateful for his visit and his talk.
And then it was time to indulge in a piece of delicious cake from Whole Foods. What a great Friday afternoon and what a terrific day, which started with meetings in Computer Science this morning.


Sunday, April 19, 2015

Sustaining Our Electric Power Supply Chains and ISO New England

High impact experiences are essential to a college education and, on April 10, 2015, we had the pleasure of visiting ISO - New England to learn about how this organization manages the reliability of electric power for all of New England along with the pricing of it and planning for the future.

I had been to ISO - NE several years back and had wanted to bring another group of students to this awesome facility in Holyoke, Massachusetts but the last time we had scheduled a tour, Superstorm Sandy hit, and it was very difficult to reschedule.

This time there were several faculty that joined our group, which is featured  in the photo above, and which also consisted of several students from our great UMass Amherst INFORMS Student Chapter as well as several students from my Humanitarian Logistics and Healthcare class.

I have been fascinated by electric power supply chains since one of my research "bibles" is the classical book, "Studies in the Economics of Transportation," written by Beckmann, McGuire, and Winsten and in the book it is stated in the chapter on "Unsolved Problems"  at the bottom of page 108 that: "The unsolved problems concern the application of this model (they were speaking of what we now call the elastic demand user-optimized transportation network model or the traffic network equilibrium model) to particular cases. A one-commodity network would be of special interest. In particular, the problem of generation and distribution of electric energy in a network comes to mind. The task of verifying the assumptions or modifying the model might be rewarding, but will call for considerable technical knowledge of electric engineering."

With co-authors, I wrote a series of papers on electric power supply chains, in which we also transformed the electric power supply chains into transportation network equilibrium problems on an abstract network or supernetwork, resolving this unsolved problem of over half a century.


One of our papers, which used data from ISO - NE for one of the hottest months in our region  ever - July 2006, is: An Integrated Electric Power Supply Chain and Fuel Market Network Framework: Theoretical Modeling with Empirical Analysis for New England, Zugang Liu and Anna Nagurney, Naval Research Logistics 56: (2009) pp 600-624. In this paper we utilized the transformation noted earlier in this post and had actually solved the "unsolved problem" in the paper:
Dynamic Electric Power Supply Chains and Transportation Networks: An Evolutionary Variational Inequality Formulation, Anna Nagurney, Zugang Liu, Monica-Gabriela Cojocaru, and Patrizia Daniele, Transportation Research E 43: (2007) pp 624-646.

ISO New England provided us with an outstanding set of presentations on the state-of-the-art of electric power generation and distribution with new challenges of decentralization and balancing supply and demand with renewables such as solar and wind energy.  We even got to hear how the R&D group is working on robust optimization in the context of electric power planning.

We then had the shades, which had been drawn in the conference room, pulled back and we got to see the incredible control room with a huge screen depicting the New England power grid in real time! 
The below photo of the control room is courtesy of the ISO NE website.

They also informed us of the ISO to Go! app, available for both I-phone and Android, which can be positively addicting. It provides info on wholesale prices (which can even be negative) as well as the fuel mix (wind, coal, natural gas, nuclear,  etc.). Last winter, due to a capacity crisis in terms of natural gas distribution in NE, and the frigid temperatures, the fuel mix relied heavily on fossil-based fuels for electric power generation and we know from our high fuel bills that this winter was also tough financially. The wholesale price last winter was well over $50 per Megawatt hour and now it is about $14 but the price varies and is updated several times each hour.

Thanks to ISO New England for such an outstanding educational experience for the students and faculty that you welcomed last Friday!