Recent content on Blog Frank Boerman
After 2 cancelled days the Advanced Hybrid Coupling external parallel run finally started on business day 2026-04-17! I have been involved in the AHC project for a while now, so that was a pretty nice milestone! The next step is the actual go-live, currently foreseen for businessday the 11th of June, so not far off! 
 In this post I wanted to take a quick look at the first couple of days of…
Last year I wrote about fluctuations in the market and the effects on grid constraints. In summary due to increased exports from France to Italy North, the French TSO RTE introduced new Flowbased constraints. These then limit the French export possibilities towards the Core region. These limits follow from forecasted flows from France to Italy North, the so called Fuaf . 
 We are now a year…
I have received many requests over the years for people wanting to use my private databases. I have always wanted to open it up but, until recently, never got around to setting up proper security and organisation. Now I have and my new Amun Analytics Datalake is live in beta mode ! 
You can register and login through the new Amun Single Sign On. After this you need to contact me through email…
The flowbased capacity calculation system as a whole, and the domain specifically, can be pretty daunting to people who are just learning about it. Today I wanted to give a short introduction on some key concepts. Next to that I will present some analysis methods of the active constraints. Please note that I will assume some basic linear algebra optimization knowledge throughout this post.…
On the 25th of June, the new Core IDCC(c) capacity calculation will go live. This is the third of a total of five planned Core capacity calculations in the intraday timeframe. For each of these updates, the capacities will be recalculated with updated forecasts and will take into account the trades up until the point of (re)calculation. 
In this post, I present an overview of the intraday…
Summary 
 One of the (many) things that keeps my work interesting is that the system I work on is very dynamic. Today I want to highlight one such dynamic situation by comparing the first quarter of 2025 with the first quarter of 2024. Here we will see that the grid constraints that limit the market have shifted from one TSO to another due to changing grid situation. 
 RTE (TSO of France)…
A while ago, I wrote the first part of my “year in review” series of 2023. In this series, I take a look back at some key indicators of 2023. This series looks at indicators that I find most interesting. Those are also the ones I have the most knowledge about. 
 Today, we are going to look at the Day Ahead market results in the CORE region (AT, BE, CZ, DE_LU, FR, HR, HU, NL, RO,…
Another year is over, and I wanted to write a ‘year in review’ series about the electricy system in 2023! First up is a look at how different TSOs adjust the Flowbased Domain for grid security reasons, the Individual Validations or IVA for short. 
 But first, a quick shout out to the sponsor of my database server: Code Yellow ! Code Yellow has provided the server that supports my…
Recently, it was announced that the Nordic Flowbased go-live was delayed due to IT issues. While this is obviously a pity to hear, other positive things have been announced. 
The evaluation report from NRAs was published . It was evaluated and found sufficient by the NRAs , although with some extra remarks. 
A very interesting summary containing issues found and lessons learned, was…
Recently a well known participant in the dutch energy debate, lector Martien Visser, wrote tweets and a column setting out his view that the current day ahead market design is not a good business case for NL anymore. He is not the only one, this sentiment is widespread on social media. While I do agree that in a RES dominated system it could be possible to have a better tweaked market mechanism, I…
A full year ago the Flowbased capacity calculation methodology went live in the CORE region. To mark this milestone and celebrate the anniversary, this post will look at the process stability and price convergence of Flowbased. 
Minimizing the price spread, or in other words maximizing the price convergence, is one of the goals of a more efficient capacity calculation in the region. At the…
On the 11th of May a new kind of operational message was published on the TenneT NL feed. Normally this feed is quite boring, announcing transport restrictions or grid status for example. But on Friday it announced a special type of restriction for offshore windparks. To help large scale bird migrations the offshore windparks were restricted to very slow turning of turbines. 
The discussion…
The day ahead market has fascinated me since the very first day that I started working in the sector. Many components working together to form a safe and efficient market for electricy trading. On the 18th of April this year in some of these components rare events happened. In this post, I will offer an explaination on what happened. 
 The Day Ahead market: a description and some definitions…
The Nordic Flowbased external parallel run is still going strong and its two months since my first look so time for an update! 
 If you missed it, please see the first part for a general introduction and some data remarks. 
 Flowbased Domain Results 
 Lets start with looking at the capacity calcuation process and domain. The flowbased process output seems to be still quite stable. From…
The Flowbased capacity calculation methodology that I have written about earlier is not meant only for continental Europe. In the Nordics (NO, SE, DK and FI) the TSO’s and market parties have been working on an implementation in their region as well. In the recent months they have started to publish results from their external parallel run. This is a process in which you run the new…
This post is part of a series written to celebrate the launch of Amun Analytics . This company will serve as the business umbrella for all my data analytics projects. If you have some interesting data analysis and visualization projects in which you need some help, shoot me an email ! Now lets dive into the topic of today. 
 High Prices in the Baltics 
 On Wednesday 17th August 2022, the…
In the weekend of 23th and 24th of April 2022 the day ahead prices in the Netherlands reached record lows. On Saturday it reached €-222.36 at 12:00 and on Sunday €-117.21 at 13:00. Now there are many discussion to be had about the place of negative prices in the current market design, which I will not get into now here. However the cause is quite clear: a huge ammount of renewable energy sources.…
Intuitive and non intuitive flows 
 The recent market developments put the spot light on all kinds of interesting behaviour of the way European electricity market works. One of those is non intuitive flows. At 4th November 2020 the electricity day ahead market value broke a fundamental rule: allocation of cross border flows was no longer restricted to go from a low price zone to a high price…
When I talk to friends and family about the electricitymarket, they often do not realise the large reliance of the electricity market on gas. This inspired me to look at 2021 electricity production sources. 
The plot below shows largest electricity source per hour in the Netherlands (sources are color coded over time; days at the x-axis and hours at the y-axis). 
This plot makes evident…

 Bar chart of price convergence per day in 2021 for CWE region (click to enlarge) 
 
 

 What is price convergence? 
 The electricity market in Europe is split into so-called bidding zones. The rule is that within these zones you can trade without transport restrictions, as if the entire grid there is one big conducting plate. This also means that for the day ahead…
As those that I have spoken with personally recently are well aware by now, I am working at TenneT at the System Operation Transport division, mainly on flowbased capacity calculation and bidding zone review topics. I have chosen TenneT because I wanted to play a part in something that both fascinates my and in which I hope to make a small difference for good: the energytransition and the energy…
Graduated! 
 After long months of work, today I finished my graduation project with a 7.5! That means I am now a graduated msc Electrical Engineering. Many thanks to Kees van Berkel and Marc Geilen for their supervising work! 
 Due to the corona crisis the presentation was done fully online through microsoft teams. I have made a recording of the 30 min presentation, links to all material…
While I’m finishing the last touches on my graduation thesis (posts about that will follow soon) I wanted to take my mind off a little bit with some hobby. I have always been fascinated by presenting data in a clear and automated way and wanted to experiment a bit with that. As a subject for this I chose the big crisis of this moment: the corona virus or Covid-19. This posts serves as quick…
Introduction 
 Welcome back to a new part in my blog series about my graduation project. As mentioned in the previous parts, the Fourier Transform will be dominant in the implementation of the Coherent De-Dispersion. This part will dive into the relevant theory behind the Fourier Transform. This includes another algorithm that is need to accomplish the implementation of the Fourier Transform:…
Introduction 
 This second post of the series about my graduation project focusses on the De-Dispersion methods that are considered and their algorithms. These build on the models presented in part 1 . Equation numbers are numbered through in all parts, so references can be towards part 1. 
 Coherent versus In-Coherent De-Dispersion 
 De-dispersion is the process of reversing the…
Introduction 
 This post will be the first in a series about my graduation project. As a final deliverable I will have to write a scientific paper as well, which will be made available for download when its done. The idea behind these blog posts is that they serve as a more expanded version of this final paper for general documentation. The goal is to make it accessible for persons not…
Klimaat en de politiek 
 Global warming: het is een hot topic de laatste tijd. Het speelde een grote rol in de afgelopen Tweede Kamer verkiezingen (2017), met Jesse Klaver van Groenlinks als voornaamste aanjager. En met success, GroenLinks won flink. Mede hierdoor werd er vanaf 2018 een groot polder project gestart: het Nederlandse klimaat akkoord. 
Ook bij de afgelopen Provinciale Staten…
Django 
 For quite some time python has been one of my favourite programming language. Although its not the best choice for all use cases, the right tool for the right job after all, it has a very nice flow to it when programming. Things are easily done, the documentation quite good and there is a lot of help available through google. 
 One of the best examples for the excellent ecosphere…
Mijn opa en oma wonen vrij dichtbij mij in de buurt. Met mijn familie gaan we daar dan ook geregeld heen. Mijn oma is een intelligent mens en al mijn hele leven herinner ik me haar als iemand die nadenkt over de wereld om haar heen en daarover discusieert. Enige tijd geleden kwamen we op een zondag op een gevoelig onderwerp: de pensioenen. Deze zijn veel in het nieuws omdat deze alleen maar lijken…
Welkom op mijn persoonlijke blog! Hier deel ik een verzameling van gedachtes en wat data onderzoeken die ik uit hobby interesse uitgevoerd heb.
Hi my name is Frank and welcome to my blog! Something about me, I have a Msc in Electrical Engineering from the TU/e and live in Boxtel. I work at TenneT as a Flowbased capacity calculation expert and am mainly active in monitoring, reporting and helping design improvements of the CORE Flowbased processes. Sometimes I also do this for Day-ahead and Intraday markets. 
 As a hobby I like to run…
For questions, compliments or other forms of messages you can reach me at my personal email frank@fboerman.nl . 
 For business inquiries you can reach me at my personal business umbrella frank@amunanalytics.eu . For registration information on my business see https://amunanalytics.eu/ . 
 You can find me on linkedin here and my twitter (or X) here . I am also active on github here .