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Reactive equal partitioning method of alternating current/direct current mixed micro power grid 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., can solve problems such as inability to achieve precise distribution of reactive power and inability to achieve equal sharing of reactive power , to achieve fast convergence rate, optimal control, and improved reliability

Active Publication Date: 2018-12-07
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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  • Reactive equal partitioning method of alternating current/direct current mixed micro power grid based on finite time control
  • Reactive equal partitioning method of alternating current/direct current mixed micro power grid based on finite time control
  • Reactive equal partitioning method of alternating current/direct current mixed micro power grid based on finite time control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0053] 1. Microgrid parameter setting

[0054] According to the simulation system of the AC-DC hybrid microgrid built in step 1, set the corresponding parameters such as voltage and power in the droop control of each distributed power supply. 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 system reactive load change is simulated, and the reactive power variation of each distributed power supply is collected when the reactive load changes.

[0060]When the microgrid is in stable operation, record the reactive power actually output by each dis...

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Abstract

The invention discloses a reactive equal partitioning method of alternating current / direct current mixed micro power grid based on finite time control. The method comprises following steps of step 1:establishing an alternating current / direct current mixed power grid control framework considering alternating-direct current mutual support; step 2: establishing a reactive control model of the alternating current / direct current mixed micro power grid; step 3: acquiring reactive power change quantity of the alternating current / direct current mixed micro power grid; and step 4: based on finite timeconsistency, providing an alternating current / direct current reactive equally partitioning strategy. According to the invention, by constructing the mixed power grid distributed control model considering the alternating current / direct current interaction, a one-time control model of reactive control is established, requirements of the plug and play of a distributed power supply are met and reliability of system control is improved.

Description

technical field [0001] The invention relates to the field of reactive power control of a distributed power supply of an AC-DC hybrid micro-grid, in particular to a reactive power equalization method for an AC-DC hybrid micro-grid based on finite time consistency control. Background technique [0002] With the increasing scale of the power grid, the number of DC micro-grid networks in my country is increasing, the demand for power is growing, and the degree of power marketization is continuously improving. In the AC micro-grid and AC-DC hybrid micro-grid, how to meet the needs of users? In this situation, making full use of the reactive power adjustment 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 devoted themselves to studying for many years. [0003] Voltage is an important index to measure power quality, and the operating voltage of the system depends on the...

Claims

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Application Information

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Patent Type & Authority Applications(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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