A power grid management system for managing a power grid, the power grid comprising a plurality of grid devices, the power grid management system comprising: a first grid device positioned in a first section of the power grid, the first grid device comprising: a first sensor configured to sense a first electrical parameter in the first section of the power grid; a first processor configured to analyse the first electrical parameter in the first section of the power grid in order to determine an event based on the first electrical parameter, and a second grid device associated with a substation positioned in a second section of the power grid, the second grid device comprising: a second sensor configured to sense a second electrical parameter in the second section of the power grid; and a second processor configured to: receive the event determined by the first grid device; analyze the event determined by the first grid device and the second electrical parameter in the second section of the power grid; modify operation of at least a section of the power grid comprising the second section based on the event and the analysis by the second processor; and transmit, to a central power grid authority that manages the power grid, information indicative of the operational modification of the at least a section of the power grid. a first grid device positioned in a first section of the power grid, the first grid device comprising: a first sensor configured to sense a first electrical parameter in the first section of the power grid; a first processor configured to analyse the first electrical parameter in the first section of the power grid in order to determine an event based on the first electrical parameter, and a first sensor configured to sense a first electrical parameter in the first section of the power grid; a first processor configured to analyse the first electrical parameter in the first section of the power grid in order to determine an event based on the first electrical parameter, and a second grid device associated with a substation positioned in a second section of the power grid, the second grid device comprising: a second sensor configured to sense a second electrical parameter in the second section of the power grid; and a second processor configured to: receive the event determined by the first grid device; analyze the event determined by the first grid device and the second electrical parameter in the second section of the power grid; modify operation of at least a section of the power grid comprising the second section based on the event and the analysis by the second processor; and transmit, to a central power grid authority that manages the power grid, information indicative of the operational modification of the at least a section of the power grid. a second sensor configured to sense a second electrical parameter in the second section of the power grid; and a second processor configured to: receive the event determined by the first grid device; analyze the event determined by the first grid device and the second electrical parameter in the second section of the power grid; modify operation of at least a section of the power grid comprising the second section based on the event and the analysis by the second processor; and transmit, to a central power grid authority that manages the power grid, information indicative of the operational modification of the at least a section of the power grid. receive the event determined by the first grid device; analyze the event determined by the first grid device and the second electrical parameter in the second section of the power grid; modify operation of at least a section of the power grid comprising the second section based on the event and the analysis by the second processor; and transmit, to a central power grid authority that manages the power grid, information indicative of the operational modification of the at least a section of the power grid. <EOS>