Virtual synchronous generator control strategy combining with virtual inertia dynamic adjustment

A technology of generator control and virtual inertia, which is applied in the field of microgrid, can solve the problems of reducing the dynamic characteristics and steady state characteristics of microgrid, virtual inertia system oscillation, etc., and achieve the effect of improving transient stability and suppressing power oscillation

Inactive Publication Date: 2019-11-29
HUNAN UNIV +1
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Problems solved by technology

[0004] However, in traditional virtual synchronous generator control, the virtual inertia in the rotor motion equation is a constant value
When a disturbance occurs, too large or too small virtual inertia will reduce the dynamic and steady-state characteristics of the microgrid
And when multiple distributed generation units are connected in parallel, the mismatch of virtual inertia will lead to more serious system oscillation

Method used

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  • Virtual synchronous generator control strategy combining with virtual inertia dynamic adjustment
  • Virtual synchronous generator control strategy combining with virtual inertia dynamic adjustment
  • Virtual synchronous generator control strategy combining with virtual inertia dynamic adjustment

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Embodiment Construction

[0040] The following combination Figure 1-9 A virtual synchronous generator control strategy combined with dynamic adjustment of virtual inertia provided by the present invention is described in detail.

[0041] Such as figure 1 , 2 As shown, the present invention provides a virtual synchronous generator control strategy combined with dynamic adjustment of virtual inertia, including the following steps:

[0042] S1. Dynamic adjustment of virtual inertia; the dynamic adjustment step of virtual inertia adjusts and outputs a virtual inertia signal in real time according to the rate of change of power and the rate of change of angular frequency;

[0043] S2. Active droop adjustment; the active droop adjustment step simulates the static and dynamic active droop characteristics of the synchronous generator, and adjusts and outputs the angular frequency signal in real time according to the active power and in combination with the virtual inertia signal;

[0044] S3. Reactive powe...

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Abstract

The invention belongs to the field of micro-grids and the technical field of motors, and especially relates to virtual synchronous generator control strategy combining with virtual inertia dynamic adjustment. The invention provides an improved virtual synchronous generator control technology. The improved virtual synchronous generator control strategy combined with the virtual inertia dynamic adjustment method overcomes the defects of traditional virtual synchronous generator control, effectively suppresses power oscillation occurring in the transient process of the microgrid, and improves thetransient stability of distributed power generation units in the alternating current microgrid. The virtual synchronous generator control strategy can be applied to the fields of multi-power-supply parallel connection, new energy microgrid and the like; and stable parallel operation between a plurality of distributed power generation units or between the distributed power generation units and various power supplies can be satisfied.

Description

technical field [0001] The invention belongs to the field of micro-grid and motor technology, and specifically relates to a virtual synchronous generator control strategy combined with dynamic adjustment of virtual inertia, a system, computer equipment and a readable storage medium. Background technique [0002] As the penetration of renewable energy distributed generation in my country's power grid continues to grow, how to solve the problem of distributed generation access and consumption has attracted more and more attention from researchers. In order to make full use of new energy distributed power generation and reduce its impact on the large power grid, micro-grid technology is considered to be an effective way, and virtual synchronous generator technology can improve the support of distributed power to micro-grid and large power grid. [0003] The traditional virtual synchronous generator control strategy simulates the dynamic and steady-state characteristics of synch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/40H02J3/24
CPCH02J3/24H02J3/40
Inventor 王俊彭子舜毕大强温烨婷戴瑜兴彭小桂
Owner HUNAN UNIV
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