{
  "url": "https://openlegislation.uk/eu-regulation-2016-1447/annex-II/division-B",
  "json_url": "https://openlegislation.uk/eu-regulation-2016-1447/annex-II/division-B.json",
  "legislation": "eur/2016/1447",
  "legislation_title": "Commission Regulation (EU) 2016/1447 of 26 August 2016 establishing a network code on requirements for grid connection of high voltage direct current systems and direct current-connected power park modules (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2016-1447",
  "path": "annex/II/division/B",
  "kind": "division",
  "number": "B",
  "heading": "Limited frequency sensitive mode overfrequency",
  "text": "1..In addition to the requirements of Article 11 the following shall apply with regard to limited frequency sensitive mode — overfrequency (LFSM-O):\n(a)the HVDC system shall be capable of adjusting active power frequency response to the AC network or networks, during both import and export, according to Figure 3 at a frequency threshold f1 between and including 50.2 Hz and 50.5 Hz with a droop S3 adjustable from 0.1 % upwards;\n(b)the HVDC system shall be capable of adjusting active power down to its minimum HVDC active power transmission capacity;\n(c)the HVDC system shall be capable of adjusting active power frequency response as fast as inherently technically feasible, with an initial delay and time for full activation determined by the relevant TSO and notified to the regulatory authority in accordance with the applicable ... regulatory framework;\n(d)the HVDC system shall be capable of stable operation during LFSM-O operation. When LFSM-O is active, hierarchy of control functions shall be organised in accordance with Article 35.\n2..The frequency threshold and droop settings referred to in point (a) of paragraph 1 shall be determined by the relevant TSO and be notified to the regulatory authority in accordance with the applicable ... regulatory framework.\nFigure 3: Active power frequency response capability of HVDC systems in LFSM-O. ΔΡ is the change in active power output from the HVDC system and, depending on the operational conditions, either a decrease of import power or an increase of export power. fn is the nominal frequency of the AC network or networks the HVDC system is connected to and Δf is the frequency change in the AC network or networks the HVDC is connected to. At overfrequencies where f is above f1 the HVDC system shall reduce active power according to the droop setting.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Word in Annex 2 s. B para. 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 3 para. 36(3)(a)(i)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Word in Annex 2 s. B para. 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 3 para. 36(3)(a)(ii)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Word in Annex 2 s. B para. 1 substituted (31.12.2020) by The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 3 para. 36(3)(a)(iii)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Word in Annex 2 s. B para. 1 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 3 para. 36(3)(b)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Word in Annex 2 s. B para. 2 omitted (31.12.2020) by virtue of The Electricity and Gas (Internal Markets and Network Codes) (Amendment etc.) (EU Exit) Regulations 2020 (S.I. 2020/1006), reg. 1(2), Sch. 3 para. 36(3)(c)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2016/1447/annex/II/division/B",
    "retrieved_at": "2026-11-01T14:45:35.996013+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}