Power distribution network layered and partitioned load shedding coordination control method based on event trigger mechanism

Abstract

The invention relates to a power distribution network layered and partitioned load shedding coordination control method based on an event trigger mechanism, which comprises the following steps of: firstly, defining an electrical distance, dividing a power distribution network into a plurality of sub-regions by combining a region division method, and establishing an active power distribution network layered and partitioned coordination control framework based on the event trigger mechanism; secondly, establishing an active power distribution network load removal optimization model which takes maximum user satisfaction and minimum whole network demand response cost as objective functions and considers constraints such as safe operation and space coupling in sub-regions; in order to accurately solve the optimization model, an improved second-order cone relaxation method is introduced to relax an original nonlinear function into a linear solvable form, and a mixed integer second-order cone programming algorithm is adopted to efficiently solve the model; according to the invention, the access voltage level of the distributed power supplies with different permeability is improved, the load shedding cost is reduced, the user satisfaction of a demand response mechanism is improved, communication resources required by hierarchical and partitioned coordination control of the power distribution network are saved, and the multi-level communication transmission pressure of the power distribution network is relieved.

Description

technical field [0001] The invention relates to the technical field of distribution network optimization and scheduling, in particular to a layered and partitioned load shedding coordination control method of distribution network based on an event-triggered mechanism. Background technique [0002] The distribution network contains a large number of users, and its operation status directly affects the user experience and power supply reliability. With the access of a large number of distributed power sources and the application of advanced communication technology, the traditional distribution network is gradually developing into an active distribution network with multi-party coordinated control, and the uncertainty of the source and load ends increases the risk of distribution network operation. In the event of line failure or power shortage in the system, part of the load needs to be removed to ensure the overall safe and reliable operation of the system. In the past two ...

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Problems solved by technology

[0003] At present, the existing partition load shedding method of distribution network, for example, when performing hierarchical partition load shedding on the distribution network after a serious fault occurs, usually adopts the "master station-substation" configuration, and the master station accepts each distribution network Substation operation information and load shedding instructions are issued; however, the information transmission and coordinated control of each distribution network sub-region after the distribution network partition is not considered. The scale of the distribution network will continue to increase in the future, and the load control process under the interconnected thinking The information transfer in will increase geometrically, and the traditional periodic trigger method is limited by the network transmission bandwidth

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