Wind turbine generator microgrid operation virtual inertial control system based on virtual synchronous generator technique and wind turbine generator microgrid operation virtual inertial control method based on virtual synchronous generator technique

A technology of generator control and virtual inertia, applied in wind power generation, single grid parallel feed arrangement, electrical components, etc., can solve threats to microgrid systems, synchronous generators and grid stability, and AC side frequency regulation without contribution , AC side frequency drop and other issues, to achieve the effect of enhancing self-regulation ability, simple and reliable control structure, and expanding contribution

Active Publication Date: 2017-12-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the AC load changes suddenly, the sudden change in power caused by the sudden load change is all borne by the synchronous generator and the grid, causing the AC side frequency to drop, threatening the stability of the microgrid system, the synchronous generator and the grid
However, the output power of the fan unit is constant and will not respond to sudden load changes, making almost no contribution to the frequency regulation of the AC side.

Method used

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  • Wind turbine generator microgrid operation virtual inertial control system based on virtual synchronous generator technique and wind turbine generator microgrid operation virtual inertial control method based on virtual synchronous generator technique
  • Wind turbine generator microgrid operation virtual inertial control system based on virtual synchronous generator technique and wind turbine generator microgrid operation virtual inertial control method based on virtual synchronous generator technique
  • Wind turbine generator microgrid operation virtual inertial control system based on virtual synchronous generator technique and wind turbine generator microgrid operation virtual inertial control method based on virtual synchronous generator technique

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Embodiment 1

[0032] Embodiment 1. A virtual inertial control system for wind turbine microgrid operation based on virtual synchronous generator technology. Combine below Figure 1 to Figure 5 The system provided in this embodiment will be described in detail.

[0033] see Figure 1 to Figure 5 , a virtual inertial control system for wind turbine microgrid operation based on virtual synchronous generator technology, characterized in that the system includes a wind turbine, a wind turbine, a machine-side inverter, an energy storage device, a DC / DC converter, and a DC bus , grid-side inverter, transformer, AC load and its sensor, filter capacitor, maximum wind energy tracking module, wind turbine control module, autonomous control module, power given module, wind turbine virtual inertia control module, virtual synchronous generator control module .

[0034] The wind turbine is electrically connected to the wind turbine, the machine-side inverter, the filter capacitor, and the DC bus in seq...

Embodiment 2

[0036] Embodiment 2. A virtual inertial control method for wind turbine microgrid operation based on virtual synchronous generator technology. Combine below Figure 1 to Figure 5 The method provided in this embodiment will be described in detail.

[0037] see Figure 1 to Figure 5 , a virtual inertia control method for wind turbine microgrid operation based on virtual synchronous generator technology, the method specifically includes:

[0038]S1. Start the wind turbine, the wind turbine, the wind turbine control module and the machine-side inverter, complete the voltage building process of the wind turbine and stabilize the DC bus voltage;

[0039] Specifically, the mathematical model of the wind turbine is as follows

[0040]

[0041] Among them, T m is the torque of the wind turbine, ρ is the air density, A is the swept area of ​​the wind rotor, V wind is the wind speed, C p (λ, β) is the wind energy utilization coefficient, λ is the tip speed ratio, β is the blade ...

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Abstract

The invention discloses a wind turbine generator microgrid operation virtual inertial control system based on a virtual synchronous generator technique and a wind turbine generator microgrid operation virtual inertial control method based on virtual synchronous generator technique. A conventional achievement of a virtual synchronous generator technique is adopted, virtual inertia of a fan set, virtual inertia of an energy storage device and VSG (Voltage Sag Generator) inertia response are mutually matched by adding a sag characteristic and designing an energy storage device self-control algorithm and a power setting module, and the problems that a virtual inertia algorithm is coupled with a maximum wind energy tracking algorithm and is hard to compatible with an energy storage algorithm are effectively solved. By adopting the system, various sudden air speed and load variations can be effectively solved, the frequency discontinuity amplitude of an alternative-current side is limited, the self-adjusting capability of a micro network system is improved, and the contribution of an air wind electric field to source network load system stability and frequency adjustment is improved. In addition, measures of speed increase or decrease are not needed in advance, no pitch angle control is needed, and the utilization rate of an energy storage device and the utilization rate of wind energy are effectively increased.

Description

technical field [0001] The invention relates to a virtual inertia control method for a distributed microgrid system, in particular to a virtual inertial control method and system for wind turbine microgrid operation based on virtual synchronous generator technology, and belongs to the technical field of distributed power generation microgrids. Background technique [0002] With the rapid development of distributed power supply and micro-grid technology, new energy power generation technology not only needs to face the technical problems of energy and power generation itself, but also needs to comprehensively consider the overall structure of the source-grid-load system and its response and performance in all aspects. In recent years, the development and utilization rate of renewable energy has continued to rise, the intermittence, volatility, and particularity of energy, and the diversity and dynamics of user loads, as well as the extensive access of new loads such as electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/38H02J3/28
CPCH02J3/386H02J3/28H02J3/48Y02E10/76Y02E70/30
Inventor 施凯叶海涵徐培凤孙宇新刘奕辰
Owner JIANGSU UNIV
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