Constraint Zone Management
A Constraint Management Zone (CMZ) is a local geographic region of the electricity network where there’s a risk that, at certain periods, the capacity of the network will be exceeded. This could be due to local increases in peak demand from clustering of EV charge points or heat pumps, or the connection of solar and wind generation.
Network operators are faced with the prospect of upgrading network infrastructure (cables and transformers) whilst dealing with uncertainty around where upgrades are needed. To manage this risk, electricity network operators pay for flexibility services (such as demand side response) from users of the network, like you.