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Island microgrid control strategy based on finite time consistency theory

A limited time, control strategy technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the instability of the entire system and achieve the effect of suppressing the impact

Active Publication Date: 2019-08-30
YANSHAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the communication fails and is interrupted, it will still cause the instability of the entire system.

Method used

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  • Island microgrid control strategy based on finite time consistency theory
  • Island microgrid control strategy based on finite time consistency theory
  • Island microgrid control strategy based on finite time consistency theory

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Embodiment Construction

[0053] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0054] The embodiment of the present invention describes an island microgrid control strategy based on finite time consistency theory, which is characterized in that the steps are:

[0055] In the island microgrid based on the distributed secondary control strategy, the peer-to-peer sparse network is used to communicate with adjacent agents, and the information and local information are obtained through consensus algorithm processing; and the consistency deviation is fed back to the finite-time consensus The frequency and voltage controllers are designed with a positive strategy; then, the output of the controller is input to the droop control, and then transferred to the voltage and current control loops, and finally the frequency and voltage are stabilized and tracked to the nominal value;

[0056] Among them, when the communication is interru...

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Abstract

The invention discloses a design method of an island microgrid control strategy based on a finite time consistency theory, and belongs to the field of intelligent power grid control. In an island microgrid based on a distributed secondary control strategy, a peer-to-peer sparse network is utilized to communicate with an adjacent agent, and information and local information are obtained through processing by adopting a consistency algorithm; and the consistency deviation is fed back to a frequency and voltage controller designed by a finite time consistency strategy; the output of the controller is input to droop control and then is transferred to a voltage and current control loop so that the stable frequency and voltage are achieved and a nominal value is tracked; when the communication is interrupted, the historical data of the adjacent agents are predicted based on an improved extreme learning machine, and the prediction result is input into the frequency and voltage controller designed by the limited time consistency strategy to achieve secondary frequency and voltage regulation in case of a communication failure.

Description

technical field [0001] The invention belongs to the field of smart grid control, and in particular relates to a design method of an island micro-grid control strategy based on finite time consistency theory. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, the use of new energy including distributed power generation technology has attracted widespread attention from the society, and microgrids have also developed rapidly. [0003] The operation of an AC microgrid can be divided into two modes: grid-connected and islanded. When operating in island mode, multiple distributed power sources are used to run in parallel to improve output power quality. In island mode, hierarchical control is generally used to optimize power quality, and different hierarchical structures are used to define and implement different control objectives. Droop control is often used as the main controller to perform frequency and voltage regulation ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/382H02J3/00H02J3/381H02J3/388H02J2203/20
Inventor 窦春霞胡小龙张博张占强吴迪
Owner YANSHAN UNIV
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