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Dynamic compensation control method and system for microgrid based on distributed residual error generator

A dynamic compensation and generator technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of bus voltage fluctuation, affecting system stability, and unable to fully realize plug and play.

Active Publication Date: 2019-11-15
NORTH CHINA UNIVERSITY OF TECHNOLOGY +2
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AI Technical Summary

Problems solved by technology

[0003] In the microgrid multi-inverter parallel system, the use of virtual impedance-based droop control can achieve power sharing and circulation suppression, but the bus voltage will fluctuate when the inverter cuts in and out, which will affect the stability of the entire system. Fully realize plug and play

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  • Dynamic compensation control method and system for microgrid based on distributed residual error generator
  • Dynamic compensation control method and system for microgrid based on distributed residual error generator
  • Dynamic compensation control method and system for microgrid based on distributed residual error generator

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Embodiment Construction

[0049] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0050] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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Abstract

The invention relates to a dynamic compensation control method and system for a microgrid based on a distributed residual error generator. The method comprises the steps of establishing a state spaceequation of the distributed residual error generator according to an obtained state space equation of the ith inverter when N inverters are connected in parallel, and obtaining a control model based on the distributed residual error generator; converting the control model based on the distributed residual error generator into a model taking disturbance di as input, calculating a dynamic compensation controller Q(s) to obtain a dynamic compensation control model based on the distributed residual error generator, and adding the dynamic compensation control model into droop control to generate acompensation control strategy so as to perform dynamic compensation control on the microgrid. The plug and play of the inverter and the load can be realized according to the invention.

Description

technical field [0001] The present disclosure relates to the technical field of power electronics, and in particular, to a microgrid dynamic compensation control method and system based on a distributed residual generator. Background technique [0002] Microgrid is a cutting-edge technology emerging on the basis of new energy distributed power generation. It supports each other with the large power grid and is an effective way to improve the energy efficiency of distributed power generation. Microgrid has two operation modes: grid-connected and off-grid (island). In the grid-connected working mode, the microgrid and the medium and low voltage distribution network are connected to the grid to support each other and realize the two-way exchange of energy. In the case of external grid failure or planned islanding, the microgrid can be converted to an off-grid operation mode to supply power to important loads inside the microgrid. Since distributed micro-sources and energy sto...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/381
Inventor 胡长斌陆珩罗珊娜周京华温春雪朴政国马瑞范辉
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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