Tomas Vallenvik

The person behind the perspective

I learned to ask what changed in the account before claiming what changed in the plant.

My work began with the assumption that a good analytical account should make its quantities comparable. Energy taught me that comparability cannot be created by removing the descriptions that make quantities different. A gross generation total does not become net output when its label is shortened. A share of a plant’s capacity is not the same account as the whole facility the company operates. I became interested in preserving those boundaries while still making the evidence usable for a decision.

I completed applied mathematics at the fictional Arvellaine Institute of Applied Mathematics in June 1992 and joined Solvrenik Analytics in August. I worked in a seven-person analytical group without line-management or spending authority. The early task was to understand the source definition before interpreting a result. It encouraged me to ask whether a change in a reported figure represented a change in the physical process, a different observation interval or simply a different account of the same underlying activity.

I became an engagement lead in April 1999. By 2005 I led sixteen colleagues through three direct reports with EUR 680000 annual delivery expense. Solvrenik’s EUR 24 million revenue and 125 employees described the advisory firm. I wanted to remain responsible for measurement definitions as they became part of everyday generation reporting, rather than finish at the point of analytical delivery. Joining Vardelune Power as head of generation data in July 2006 gave me that continuing obligation and exposed my own interpretations to operational challenge.

In 2008 I approved a negative consumption increment from an auxiliary register that had moved from 980 kWh to 20 kWh. I had subtracted the readings without examining the documented 1000 kWh register wrap. Mats Hellerby checked the maintenance record, which confirmed one rollover during the interval. The correct increment was 40 kWh, not minus 960. EUR 420000 supported review and correction. The change did not recover electricity or improve generation; it corrected the account I had accepted and made the register event visible beside the derived quantity. I also wanted the corrected explanation to remain challengeable: evidence of one rollover in that interval could not justify the same adjustment when another register behaved differently.

The director of energy information role began in September 2013. It widened my remit from generation data into the definitions used to describe a portfolio. A 2016 joint-venture wind asset had 240 MW nameplate capacity and ownership shares of 60%, 25% and 15%. The 144 MW ownership-weighted indicator for Vardelune answered a different question from the 240 MW gross operated figure. We retained both bases with clear labels, without presenting either as generated energy or a conclusion about accounting consolidation and dispatch rights.

I became CDO in April 2020. My current remit covers 98 data colleagues through six direct reports and EUR 15.4 million delegated 2026 expense. Vardelune’s EUR 2.6 billion 2025 revenue, 4.6 GW gross operated capacity and 2800 employees are institutional context. The data function does not operate the plants, trade their output or own every financial interpretation. Executive presentations to the board began with this appointment, but the fictional record contains no statutory-director role.

Recent work has examined how a generation quantity changes meaning as it is summarised. A quarterly account needed gross output, station service and net generation kept distinct. An interval pilot needed four missing observations to remain visible within a day otherwise covered by ninety-two measured intervals. A forecast review needed to distinguish predictions made eighteen hours before delivery from updates made thirty minutes before it. Those were separate questions, requiring specific definitions rather than a general assurance that the data had become cleaner.

I would bring that attention to a prospective first board role with preparation for responsibilities beyond my executive experience. The contribution would be to help colleagues ask which boundary or comparison supports a confident power-sector statement and where another owner must interpret the answer. Every organisation and result here is invented. The account is intended to show a leader’s progression, a correction he owned and the limits of particular decisions. Its credibility should come from a record that remains coherent under questioning, not from implying that a data executive personally delivered every megawatt, commercial return or operating improvement around him.

Portrait of Tomas Vallenvik
Tomas VallenvikChief Data Officer · Europe

In my own words

I want a power measure to say where it was observed, over which interval and on what basis it belongs in the account. Gross generation, net generation and ownership-weighted capacity can each be useful without describing the same thing. The data function earns its place by preserving those distinctions as the figures move between plant records, portfolio reporting and executive decisions.

Tomas Vallenvik

Career

Chapters of accountability

  1. 2020 — present

    Chief Data Officer

    Vardelune Power

    Keep generation boundaries, interval evidence and forecast purpose visible in executive information.

  2. 2013 — 2020

    Director of energy information

    Vardelune Power

    Maintain intelligible definitions across physical assets and portfolio accounts.

  3. 2006 — 2013

    Head of generation data

    Vardelune Power

    Own recurring measurement information and correct a register interpretation that I approved.

  4. 1999 — 2006

    Engagement Lead

    Solvrenik Analytics

    Lead applied analysis that retains the basis of the quantities being compared.

  5. 1992 — 1999

    Applied Analyst

    Solvrenik Analytics

    Trace a reported change to its source definition, observation interval and physical meaning.

Education

Formation

  • Bachelor of applied mathematicsArvellaine Institute of Applied Mathematics1992

Working languagesSwedish · English · German