Robust residual error generator-based inverter parallel control method and system

A robust residual generation and inverter technology, applied in the AC network to reduce harmonics/ripples, harmonic reduction devices, AC network circuits, etc., can solve the problem of increasing the loss of power electronic devices and deteriorating the circulation of multiple converters problems, increasing the cost of the filter volume, etc., to achieve the effect of improving power quality, improving transient performance and immunity, and ensuring system stability

Active Publication Date: 2019-12-27
NORTH CHINA UNIVERSITY OF TECHNOLOGY +2
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Problems solved by technology

[0005] The existing improved scheme adds more parameters related to droop control, and the parameter setting is complicated when the microgrid topology changes, and the relevant parameters of the original system need to be readjusted as the topology changes to achieve the purpose of improvement and ensure system stability. not conducive to plug and play
Inverters with different capacities will affect the power distribution when they are connected in parallel due

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  • Robust residual error generator-based inverter parallel control method and system
  • Robust residual error generator-based inverter parallel control method and system
  • Robust residual error generator-based inverter parallel control method and system

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[0052] 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.

[0053] 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 robust residual error generator-based inverter parallel disturbance feedforward compensation control method and system. The method comprises the following steps that: the filtering inductance values, capacitance values and transition frequencies of inverter filters in a multi-inverter parallel topology under the condition that the reactive power of the inverter filtersis minimum are obtained; the Pl gain of a current loop and a voltage loop in a double-closed loop structure is calculated; a robust residual generator-based dynamic compensation control structure is established, and current and voltage loop dynamic compensation controller parameters are calculated; and dynamic compensation controller-based feedforward control is added, and the multi-inverter parallel topology is controlled according to the output current of each inverter. With the robust residual error generator-based inverter parallel disturbance feedforward compensation control method and system of the invention adopted, the influence of the parameter difference between the inverters on power equalization is alleviated on the premise of ensuring system stability, so that output voltage control is more stable.

Description

technical field [0001] The present disclosure relates to the field of power electronics, in particular, to a method and system for controlling inverter parallel disturbance feed-forward compensation based on a robust residual generator. Background technique [0002] With the gradual penetration of green energy brought about by the transformation of the energy structure, the distribution network, which is closely connected with the majority of users in the power system, needs to meet the large-scale access of distributed generation systems DGs and energy storage devices, and adapt to the needs of new loads such as electric vehicles. Plug and play, and meet the continuous improvement of users' requirements for power quality. Microgrid is an effective means to reduce the impact and impact of distributed power and flexible compliance on the power system. When the large power grid fails or is repaired, the microgrid can operate in off-grid mode to ensure high-quality uninterrupte...

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Application Information

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IPC IPC(8): H02J3/38H02J3/01
CPCH02J3/01H02J3/381Y02E40/40
Inventor 胡长斌石向一罗珊娜马瑞范辉周京华温春雪朴政国
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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