Distributed hierarchical control method for flywheel matrix system applied to wind power plant

Abstract

The invention discloses a distributed hierarchical control method for a flywheel matrix system applied to a wind power plant, and a control method for a flywheel energy storage system applied to wind power plant, and particularly relates to a cooperative control method for the hierarchical structure of a flywheel energy storage matrix system applied to wind power plant. The distributed hierarchical control method comprises the following steps of: establishing the communication topological structure of each flywheel energy storage unit at first, and then constructing a multi-agent-based distributed upper-layer power allocation algorithm, determining the own charge-discharge state and power of each flywheel by allocating the total reference power of the system in a ratio according to the exchange information of each flywheel and the neighbours thereof, and submitting the calculated results to a local controller to execute, so as to realize the purpose of the invention; therefore, the distributed hierarchical control method has real-time performance, and can reduce construction cost, improve system flexibility, reduce system computation complexity, and enhance system robustness and fault tolerance.

Description

technical field [0001] The invention relates to a control method of a flywheel energy storage system applied to a wind farm, in particular to a coordinated control method of a layered structure of a flywheel energy storage matrix system applied to a wind farm. Background technique [0002] Flywheel energy storage technology is a technology that stores electrical energy as the kinetic energy of the flywheel rotor rotation. Through the control of the system, the flywheel energy storage system can store or release energy when necessary, so as to smooth the output active power of the power generation system and compensate the power. The reactive power of the system and the role of stabilizing the bus voltage. The flywheel energy storage matrix system composed of multiple flywheel energy storage units can cooperate with renewable energy power systems such as wind power generation to smooth the active output power of the system and stabilize the output voltage of the system, there...

AI Technical Summary

Problems solved by technology

Existing technologies seldom involve the coordination control problem within the flywheel group, and the existing coordination control methods also require a central processor capable of obtaining the overall information of the system, such as figure 1 Shown is the framework of a centralized flywheel matrix energy storage system. This structure based on a central controller has many disadvantages in a system with a large number of distributed units.

First of all, in order to obtain the information of all flywheel units and issue corresponding command requirements, the central controller must establish a communication link with each flywheel unit, which greatly increases the construction cost in the early stage; secondly, the centralized control algorithm gives the central The processor imposes a huge computational burden, which increases system complexity and slows down response; finally, systems under centralized control are less robust and sensitive to error messages

Once the communication line connected to the central controller is damaged, the system can easily fail to complete the task

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