Distributed economic dispatch prediction control method for direct-current microgrid cluster

Abstract

The invention discloses a distributed economic dispatch prediction control method for a direct-current microgrid cluster in the technical field of power systems. The method comprises the following steps: introducing an economic dispatch problem; modeling the direct-current microgrid cluster and a control circuit; and building a predictive function controller. When the method is mainly used for supplying multiple loads to a microgrid, power distribution needs to be optimized between the microgrid and a power generation unit to reduce the global power generation cost to the maximum extent, the method is composed of a local controller and a global third-stage controller, and under the control structure, the global third-stage controller carries out compensation through a prediction function controller based on a distributed dynamic consistency algorithm to generate the global optimal increment cost so as to achieve economic operation of the whole cluster; meanwhile, the method is different from the economic dispatching problem under the action of a traditional PI controller, the dynamic performance of the system is mainly improved by changing the bus voltage within a certain range, and the contradiction problem of algorithm optimization and large calculated amount is solved.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a distributed economic scheduling predictive control method for DC micro-grid clusters. Background technique [0002] In recent years, the DC microgrid has become an inevitable part of the modern distribution network. It can integrate various distributed power sources (such as photovoltaics, wind turbines, and batteries, etc.), improve the utilization rate of renewable energy, and reduce the power generated when it is connected to the grid. adverse effects. my country's research on DC microgrids is getting deeper and deeper. Hefei University of Technology and Zhejiang Electric Power Company have established DC microgrid laboratories and demonstration projects to provide technical support for DC microgrid projects. [0003] In order to maximize the utilization rate of renewable energy, accurately schedule the transmission power between grids, and enhance the overal...

AI Technical Summary

Problems solved by technology

However, the economic dispatch strategy uses a linear PI controller to compensate the incremental cost deviation, and the control effect is not good. The tracking speed of the bus voltage is slow, which seriously affects the power distribution between the DC microgrids, and has a great impact on the reliability and stability of the power supply of the system. unfavorable

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