Method and system for power management in substations

摘要

Power management systems and methods are disclosed for a plant electrical network using plurality of controllers configured for power management such that a first controller from the plurality of controllers is configured to perform power management in a first local process area within the plant electrical network and can communicate with a second controller that is configured for power management in a second local process area within the plant electrical network, over a plant wide communication network. The power management function in the first local process area can be performed based on the information communicated between the first controller and the second controller and/or based on a power balance computation carried out for the plant wide electrical network or for the first local process area. The power management function can include slow load shedding.

主权项

1. A method for power management in a plant electrical network comprising one or more upstream and downstream substations, the one or more upstream and downstream substations comprising a plurality of power equipment, and wherein the power management is carried out using one or more local controllers and a central controller, the one or more local controllers and the central controller being configured for the power management in their respective local process areas within the plant electrical network, and wherein the one or more local controllers and the central controller are also configured for communication in a plant wide communication network, wherein the one or more local controllers and the central controller communicate with each other and with a plurality of intelligent electronic devices associated with respective power equipment of the plurality of power equipment, the method comprising:
receiving, at the central controller, load condition information which includes an amount of overload in at least one of the power equipment along with a direction of the overload, from at least one local controller among the one or more local controllers in the plant electrical network; performing power balance computations, by the central controller, for plant wide power management considering the received load condition information; issuing, by the central controller, a power management command along with a priority information based on the direction of the overload to the one or more local controllers in the plant wide communication network; and carrying out load shedding by the central controller or the one or more local controllers in their respective local process areas based on the power balance computations and the issued power management command.