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A Microgrid Voltage Control Method for Fuzzy Adaptive Operation of High Penetration Fans

A voltage control method and a fuzzy self-adaptive technology, which are applied in the field of microgrid voltage control in the fuzzy self-adaptive operation of high-penetration fans, can solve the problem of not considering the DC microgrid microsource output, load demand and energy storage state, and control accuracy. and lack of coordination, so as to improve the stability of voltage operation and cope with load disturbances.

Active Publication Date: 2021-07-20
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

Virtual inertia control ensures that the transient process of power shortage has enough active power to resist the voltage drop, and maintains the stable operation of the DC microgrid voltage. The problem of insufficient coordination has not considered the relationship between the micro-source output, load demand and energy storage status in the DC micro-grid

Method used

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  • A Microgrid Voltage Control Method for Fuzzy Adaptive Operation of High Penetration Fans
  • A Microgrid Voltage Control Method for Fuzzy Adaptive Operation of High Penetration Fans
  • A Microgrid Voltage Control Method for Fuzzy Adaptive Operation of High Penetration Fans

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Embodiment

[0056] The present invention proposes a microgrid voltage control method for fuzzy self-adaptive operation of a high-permeability fan based on code regulation, including the following steps:

[0057] Step 1: According to the influence of droop control, reserved load shedding power and virtual inertia control parameters on the stable operation of microgrid voltage, define the parameter inertia support benefit S to measure the inertia;

[0058] Step 2: Aiming at the complex coupling relationship between the voltage level in the microgrid and the output of each distributed power supply, comprehensively consider the fan penetration rate and energy storage SOC in the DC microgrid to determine the scheduling plan, and set the control mode of each distributed power supply in encoded form;

[0059] Step 3: On the basis of the coded and determined scheduling scheme, the input variables are bus voltage U, inertia support benefit S and load shedding level D, and the specific virtual iner...

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Abstract

The invention relates to a micro-grid voltage control method for fuzzy self-adaptive operation of a high-permeability fan, which includes the following steps: 1) For a DC micro-grid system, determine the busbar voltage control method, that is, use load shedding control to reserve a spare capacity, and perform virtual Inertia control and droop control; 2) Define the inertial support benefit used to measure the size of the inertia, and improve the inertial support benefit S through the virtual inertia control variable of the fan; 3) Carry out the double-layer micro-grid voltage control under the fuzzy operation under the code control, the upper layer adopts Power-based distributed power generation coding, the dispatching scheme is determined according to the penetration rate of the fan and the energy storage battery, the lower layer takes the inertial support benefit S, voltage U and the load shedding level of the upper dispatching plan as inputs, and the virtual inertia control is determined through adaptive fuzzy control parameters and droop control coefficients. Compared with the prior art, the invention has the advantages of effectively responding to load disturbances, improving the voltage operation stability of the microgrid, and the like.

Description

technical field [0001] The invention relates to the field of doubly-fed fan control, in particular to a microgrid voltage control method for fuzzy self-adaptive operation of a high-permeability fan based on code regulation. Background technique [0002] The distributed power generation system based on microgrid can accommodate more wind turbine capacity and improve energy utilization efficiency. Most new energy distributed power generation devices, energy storage devices and more and more loads use direct current. Therefore, if the DC micro-grid architecture is adopted, the additional DC / AC conversion link can be omitted, and the structure is simple and the efficiency is higher. However, with the development of power electronics technology, the voltage level of the DC micro-grid has become flexible and controllable. Frequency conversion loads and DC precision loads are emerging one after another, and DC power supply has been widely used in the energy industry due to its uniq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06H02J3/38H02J3/32
CPCH02J3/06H02J3/32
Inventor 边晓燕印良云张骞周歧斌赵健王小宇李东东林顺富
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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