Coordinated control system and method for DG (Differential Gain) of multi-time scale active power distribution network

Abstract

The invention discloses a coordinated control system for a DG (Differential Gain) of a multi-time scale active power distribution network. A local optimized target in each control subarea and an optimal capacity of each distributed generating unit under the condition of a long time scale are solved according to an optimal target function of an active power distribution network. On the basis of optimal running, according to the control subarea autonomy, the optimal target function is controlled to realize the real-time coordinated control on each DG in the area. The coordinated control system realizes the coordination for the global optimization and local autonomy of a distributed energy resource accessed to the active power distribution network, so that the network is under a more optimized running state and the utilization for the distributed energy resource is increased. Meanwhile, the influence of different time scales is considered, the economical efficiency of the system running is enhanced, the running robustness is optimized, and the popularization and application of the distributed energy resource are more benefited.

Description

technical field [0001] The invention relates to the coordinated control of distributed power generation in an active distribution network in the field of intelligent distribution networks. The invention proposes a multi-time scale DG coordinated control system and method applied to an active distribution network. Background technique [0002] With its flexible, compatible and optimized characteristics, the active distribution network is an effective solution for the future intelligent distribution network to realize the active management of a large number of connected distributed generation units (DG, Distributed Generation). However, the demand for DG to participate in the dispatching operation of the distribution network and the intermittency and uncertainty of renewable energy generation have brought great challenges to the DG coordinated control of the active distribution network. [0003] At present, the control technology of DG connected to the power grid mainly focuse...

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Problems solved by technology

However, micro-grid control also has certain limitations. Firstly, it is manifested in its overall single controllability. The entire micro-grid control area must be in a relatively centralized range. Secondly, micro-grid control places more emphasis on the autonomy within the control area and does not optimize with the power grid. coordination

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