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A reactive power sharing method for AC-DC hybrid microgrid based on finite time control

An AC-DC hybrid technology with limited time, applied in reactive power compensation, reactive power adjustment/elimination/compensation, electrical components, etc., which can solve the problems of inability to achieve reactive power equalization and accurate reactive power distribution. , to achieve the effect of fast convergence rate and improved reliability

Active Publication Date: 2022-08-02
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inverters using Q-V droop control cannot achieve precise distribution of reactive power when impedances are mismatched
Therefore, conventional droop control cannot achieve reactive power sharing

Method used

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  • A reactive power sharing method for AC-DC hybrid microgrid based on finite time control
  • A reactive power sharing method for AC-DC hybrid microgrid based on finite time control
  • A reactive power sharing method for AC-DC hybrid microgrid based on finite time control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] like figure 1 , 2 As shown in , 3 and 4, an AC-DC hybrid microgrid simulation system is established. The system contains 4 AC micro-sources, 3 DC distributed power sources, and each distributed power source in the micro-grid adopts droop control.

[0053] 1. Microgrid parameter settings

[0054] According to the simulation system of the AC-DC hybrid microgrid built in step 1, the corresponding voltage, power and other parameters are set in the droop control of each distributed power source. The relevant data are as follows:

[0055] Table 1 Parameters of distributed power sources in AC-DC hybrid microgrid

[0056]

[0057]

[0058] 2. Data collection

[0059] Based on the built simulation model, the scene of the system reactive load change is simulated, and the reactive power change of each distributed power source is collected when the reactive load changes.

[0060]When the microgrid is running stably, record the actual output reactive power of each distribu...

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Abstract

The invention discloses a reactive power sharing method based on limited-time control of an AC-DC hybrid microgrid, comprising the following steps: Step 1: Establish an AC-DC hybrid microgrid control framework considering AC-DC interactive support; Step 2: Establish The reactive power control model of the AC-DC hybrid microgrid; step 3: collecting the reactive power change, quantity of the AC-DC hybrid microgrid; step 4: based on the finite-time consistency AC-DC reactive power equalization strategy; The DC-interactive hybrid microgrid distributed control model establishes a primary control model for reactive power control, which satisfies the plug-and-play requirements of distributed power sources and improves the reliability of system control.

Description

technical field [0001] The invention relates to the field of AC / DC hybrid microgrid distributed power reactive power control, in particular to an AC / DC hybrid microgrid reactive power equalization method based on finite time consistency control. Background technique [0002] With the increasing scale of the power grid, the increasing number of DC microgrids in my country, the continuous growth of power demand, and the continuous improvement of the degree of marketization of power, in AC microgrids and AC / DC hybrid microgrids, how to meet the needs of users on the premise Therefore, making full use of the reactive power regulation means of the system to ensure the power quality and stable economic operation of the system has been a problem that electric power workers at home and abroad have been working on for many years. [0003] Voltage is an important indicator to measure power quality, and the operating voltage of the system depends on the balance of reactive power. The v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J5/00H02J3/18
CPCH02J3/18H02J5/00Y02E40/30
Inventor 柳伟游建斌
Owner NANJING UNIV OF SCI & TECH
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