Security of Supply / relation to Reliability / relation to Universal Access, Universal Basic Services (UBS)

In the discussion about long-term planning of distributino grids (ISGAN Lighthouse Propject), there is a need to clarify the relation between terms and concepts such as

1. Security of Supply (EU), e.g.ACER: https://www.acer.europa.eu/electricity/security-of-supply; EEA defines security of supply as “the availability of energy at all times in various forms, in sufficient quantities, and at reasonable and/or affordable prices.“; https://www.bmwk-energiewende.de/EWD/Redaktion/EN/Newsletter/2019/07/Meldung/direkt-account.html; https://www.bmwk.de/Redaktion/EN/Publikationen/Studien/definition-and-monitoring-of-security-of-supply-on-the-european-electricity-markets-from-2017-to-2019.html
2. Reliability / (opertional dimension)
3. “power system adequacy, a presence in the system of sufficient amounts of generation and transmission capacity” [https://en.wikipedia.org/wiki/Power_system_reliability]
4. Universal access (right to be connected)
5. Universal basic services (human right)