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Robust optimization control method of frequency and voltage integration based on virtual synchronous generator

A generator voltage and virtual synchronization technology, applied in the direction of irreversible DC power input to AC power output, electrical components, circuit devices, etc., can solve problems such as easy loss of stability, damage to power electronic equipment, etc., and achieve stability and high reliability, ensuring stable operation and reducing errors

Active Publication Date: 2021-05-04
SOUTHEAST UNIV +1
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Problems solved by technology

[0002] When a large number of distributed power sources are connected to the distribution network, the conventional inverter control method may cause instantaneous overload due to no support of damping and inertia characteristics, which may cause damage to power electronic equipment.
Although the virtual synchronous generator control method can provide a certain inertia and damping support for the system by adding virtual inertia and damping characteristics in the control aspect, it fails to actually consider the operating state of the operating system, and the system is prone to loss when it is affected by internal and external disturbances. stability

Method used

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  • Robust optimization control method of frequency and voltage integration based on virtual synchronous generator
  • Robust optimization control method of frequency and voltage integration based on virtual synchronous generator
  • Robust optimization control method of frequency and voltage integration based on virtual synchronous generator

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Embodiment Construction

[0030] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0031] The frequency and voltage integrated robust optimization control method based on the virtual synchronous generator provided by the present invention, combined with such figure 1 The core idea of ​​the robust feedback control principle shown is based on figure 2 , image 3 The realization of the control architecture shown is based on the traditional virtual synchronous generator control strategy, through the modeling of the overall system variables and disturbance variables, the introduction of robust H ∞ Control theory realizes optimal control of frequency and voltage. Specifically, the inventive method comprises the following steps:

[0032] (1) Frequ...

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Abstract

The invention discloses a frequency-voltage integrated robust optimization control method based on a virtual synchronous generator. On the basis of the traditional virtual synchronous generator control strategy, by considering the actual operating state of the system, the overall system variables and disturbance variables are modeled, Introduce robust H ∞ Control theory realizes feedback control of frequency and voltage, and further introduces sliding mode control theory to realize tracking control of frequency and voltage on the basis of stable feedback control. The optimal control method fully considers the active and reactive power in the system and the change of load current, and on this basis, the state space equations for frequency and voltage are established. The model fully considers the incomplete decoupling of current and voltage, so the method of the present invention is not only suitable for high-voltage power grids with inductive lines, but also for low-voltage distribution networks with resistance-inductive lines; at the same time, the feedback is a feedback control method with a fixed structure , without dynamic adjustment of parameters, high operational reliability and stability.

Description

technical field [0001] The invention belongs to the technical field of generator control, relates to inverter control and optimization technology, and more specifically relates to a frequency-voltage integrated robust optimization control method based on a virtual synchronous generator. Background technique [0002] When a large number of distributed power sources are connected to the distribution network, the conventional inverter control method may cause instantaneous overload due to no support of damping and inertia characteristics, which may cause damage to power electronic equipment. Although the virtual synchronous generator control method can provide a certain inertia and damping support for the system by adding virtual inertia and damping characteristics in the control aspect, it fails to actually consider the operating state of the operating system, and the system is prone to loss when it is affected by internal and external disturbances. stability. Contents of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02M7/48
CPCH02J3/381H02M7/48Y02A30/60
Inventor 窦晓波张从越王小红侯凯葛浦东汤晓晨伍小刚
Owner SOUTHEAST UNIV
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