Microgrid distributed finite time control method based on communication lag

A finite time, control method technology, applied in microgrid voltage and frequency control, microgrid distributed finite time control field considering communication delay, can solve the problem of not considering the influence of communication lag, not considering the design of secondary controllers, etc. problem, achieve the effect of satisfying plug-and-play and solving the lag problem

Inactive Publication Date: 2016-08-24
CHONGQING UNIV
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Problems solved by technology

These literatures did not consider the influence of communication lag and information transmission lag in the secondary control, let alone the design of the finite-time secondary controller under the time lag

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  • Microgrid distributed finite time control method based on communication lag
  • Microgrid distributed finite time control method based on communication lag
  • Microgrid distributed finite time control method based on communication lag

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0032] Through consulting the data, it is found that in most technical literatures, the secondary control strategy of the microgrid generally ignores the influence of communication delay, and the proposed secondary controller can only guarantee the control in infinite time in theory. Converges to a stable value and cannot achieve finite-time convergence under time delays.

[0033] Although with the advancement of communication technology, a small communication delay is acceptable in some cases. For some occasions with relatively high requirements, when the communication link is complex, the influence of communication time lag cannot be ignored. Therefore, the design of...

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Abstract

The invention discloses a microgrid distributed finite time control method based on a communication lag. The microgrid distributed finite time control method comprises the following steps of acquiring an output current voltage of an inverter end and an input current voltage of a load end by a voltage/current acquisition module, and outputting the output current voltage and the input current voltage to a primary controller of the voltage/current acquisition module, a secondary controller of the voltage/current acquisition module and a secondary controller of a neighboring power generation unit; processing the voltage current information of the secondary controllers and the voltage current information of a neighboring node by the secondary controller, and generating voltage and frequency reference information of the primary controller; generating a sinusoidal pulse width modulation (SPWM) wave by the primary controller through power calculation, droop control and voltage current control according to the reference information given by the secondary controllers, and controlling the output voltage of an inverter. In actual secondary control of a microgrid, the communication lag will necessarily exist, and by the method, the lag problem can be effectively solved.

Description

technical field [0001] The invention relates to the field of micro-grid secondary control, which is applied to distributed power generation, smart grid, and micro-grid voltage and frequency control based on droop characteristics; in particular, it relates to a distributed finite-time control method of micro-grid considering communication time lag. Background technique [0002] With the rapid development of modern industry, people's demand for energy is also increasing. Traditional energy is non-renewable and will cause many environmental problems, such as smog, greenhouse effect, etc., prompting people to find new energy to replace some Consumption of traditional energy. [0003] Typical new energy sources include solar energy, wind energy, etc., but these energy sources are limited by natural conditions, and it is difficult to obtain efficient and stable energy sources. Usually, these new energy sources are combined in a certain way to form a distributed power generation ne...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02M7/5395
CPCY02P80/14H02J3/46H02M7/5395
Inventor 陈刚郭志军
Owner CHONGQING UNIV
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