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Microgrid voltage control method for fuzzy self-adaptive operation of high-permeability fan

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 insufficient control accuracy and coordination, and do not take into account the DC microgrid microsource output and load requirements. It can improve the stability of voltage operation and cope with load disturbances.

Active Publication Date: 2020-04-24
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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  • Microgrid voltage control method for fuzzy self-adaptive operation of high-permeability fan
  • Microgrid voltage control method for fuzzy self-adaptive operation of high-permeability fan
  • Microgrid voltage control method for fuzzy self-adaptive operation of high-permeability fan

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Embodiment

[0056] The present invention proposes a micro-grid voltage control method for fuzzy self-adaptive operation of high-permeability fans based on code regulation, which includes 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...

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Abstract

The invention relates to a microgrid voltage control method for fuzzy self-adaptive operation of a high-permeability fan. The method comprises the following steps: (1), determining a bus voltage control method for a DC microgrid system, i.e., employing load shedding control to reserve a standby capacity, and carrying out virtual inertia control and droop control; (2) defining an inertia support benefit for measuring inertia, and improving the inertia support benefit S through a fan virtual inertia control variable; and (3) performing double-layer microgrid voltage control of fuzzy operation under coding regulation, wherein the upper layer adopts power-based distributed power supply coding, a scheduling scheme is determined according to the permeability of a fan and an energy storage battery, and the lower layer determines a virtual inertia control parameter and a droop control coefficient through adaptive fuzzy control by taking an inertia support benefit S, a voltage U and a load shedding grade of the upper-layer scheduling scheme as input quantities. Compared with the prior art, the method has the advantages that load disturbance can be effectively dealt with, the voltage operation stability degree of the microgrid is improved and the like.

Description

technical field [0001] The invention relates to the field of doubly-fed wind turbine control, in particular to a microgrid voltage control method based on code regulation and fuzzy self-adaptive operation of high-permeability wind turbines. Background technique [0002] The microgrid-based distributed power generation system 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 emerge in endlessly, and DC power supply has been widely used in the energy industry due to its ...

Claims

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Application Information

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Patent Type & Authority Applications(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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