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Parallel intelligent control method for microgrid data driving inverter

A data-driven, intelligent control technology, applied to electrical components, AC power input conversion to DC power output, output power conversion devices, etc., can solve problems such as parameter drift

Active Publication Date: 2017-07-25
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this invention is to overcome the problems of unmodeled dynamics in the traditional inverter parallel control method, that is, parameter drift will occur when there is external interference, and propose a microgrid data-driven inverter parallel control method to Balance load power distribution among individual inverters

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  • Parallel intelligent control method for microgrid data driving inverter
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  • Parallel intelligent control method for microgrid data driving inverter

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Embodiment Construction

[0085] The distributed data-driven microgrid inverter parallel intelligent control method proposed by the present invention is applied to the parallel system of three 30kW inverters, such as figure 1 with 2 As shown, the AC bus voltage of the microgrid is 380V, and each inverter controller adopts the proposed data-driven intelligent control method. The control block diagram is shown in image 3 As shown, and all inverters share data through the communication bus. according to Figure 4 with Figure 5 The specific control implementation steps are as follows:

[0086] Step 1. According to the droop control method, the initial value of the control parameters of each inverter is obtained, that is, the modulation wave U in the form of line voltage for generating PWM control pulses ab , U bc , U ca and the output three-phase line voltage E ab ,E bc ,E ca , converted into a digital signal by the A / D sampling module of the DSP chip TMS320F28377D, the sampling frequency is 10k...

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Abstract

The invention belongs to the technical field of microgrid control, and discloses a parallel intelligent control method of a microgrid data driving inverter. By the method, the problems of unmodeled dynamics and the like existing in a traditional parallel converter control method are solved, namely, data drift will be occurred in the presence of external interference to balance load power allocation among inverters. Meanwhile, with regard to the defect of an existing modulation technology, the problems that the load is unbalanced and an intermediate point of a DC-side voltage cannot be found are prevented by employing a pulse width modulation (PWM) inverter control method for solving a discrete reserve line voltage, so that the balance state can be reached according to the required line voltage even on the condition that the load is unbalanced.

Description

technical field [0001] The invention belongs to the technical field of micro-grid control, and in particular relates to a data-driven parallel intelligent control method for inverters in a micro-grid. Background technique [0002] With the development of micro-grid technology, on the one hand, the increase in load requires micro-sources to provide greater output power; on the other hand, due to the relatively scattered distribution of renewable energy, small scale, and discontinuous production, traditional centralized power supply methods These requirements cannot be well met, and the parallel connection of each inverter system can realize power distribution, and has good redundancy and reliability. The problem caused by the parallel connection of inverters is that there will be circulating currents between the inverters, which will reduce the output power quality of the inverters and shorten the life of power electronic devices. [0003] The existing inverter parallel cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
CPCH02M7/5387
Inventor 闫士杰周建勋高文忠李叶青
Owner NORTHEASTERN UNIV