South Korea swaps hard grid limits for curtailable access to host 100 GW-plus
Serguey Asael Shinder2 min readSouth Korea's Ministry of Climate, Energy and Environment has announced an overhaul of grid connection rules aimed at accommodating more than 100 GW of renewable capacity by 2030, pv magazine reports. The core change replaces hard connection limits with curtailable access, storage and competitive allocation of connection rights.
Restrictions on new renewable connections in Honam, the south-western region covering Gwangju and North and South Jeolla, have been lifted. Projects already waiting get priority, and new ones will apply under a revised framework from January 2027. Parts of Chungcheong will reopen, and limits on the east coast will be lifted in the first half of 2027, when the first phase of an HVDC line from the coast to Singapyeong is finished.
Under the new flexible regime, projects may connect beyond a grid section's normal hosting limit and accept curtailment when output exceeds what the network can take. The ministry says this raises the solar limit on a distribution line from 14 MW to 16 MW and at a substation from 50 MW to 60 MW, allowing 2.6 GW more solar in Honam alone without new lines. It also plans storage as an alternative to new lines, aiming to connect 3 GW of additional solar through storage on distribution networks and 1.6 GW through storage at substations by 2030.
Connection rights are being tightened as well. The ministry says it has already recovered 9 GW from reserved but unviable projects and expects to recover more than 10 GW in Honam by 2030 by pushing delayed projects' rights back to when they will actually connect. From 2031, it will allocate rights assuming a 67.2% on-time completion rate rather than assuming every project is built on schedule. Connection studies will now assume renewables are dispatched before fossil plants, which it estimates frees room for 20 GW nationwide. From January 2027, rights go to projects chosen by competitive bidding instead of first come, first served.
The ministry projects transmission-level hosting capacity rising from 119 GW to 171 GW by 2030, and distribution-level from 84 GW to 110 GW.
Why it matters
Most of the extra room comes from rules, not wires: counting curtailable access, cleaning out speculative reservations and modelling renewables in their real dispatch order. The trade-off is curtailment risk, which moves from the grid operator to the developer.