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Virtual synchronous generator-based frequency voltage integrated robust optimization control method

A technology of virtual synchronization and control method, applied in the direction of irreversible DC power input to AC power output, electrical components, circuit devices, etc., can solve the problems of power electronic equipment damage, easy loss of stability, etc., and achieve stability and High reliability, reduce errors, and ensure stable operation

Active Publication Date: 2018-08-28
SOUTHEAST UNIV +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

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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  • Virtual synchronous generator-based frequency voltage integrated robust optimization control method
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  • Virtual synchronous generator-based frequency voltage integrated robust optimization control method

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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 virtual synchronous generator-based frequency voltage integrated robust optimization control method. On the basis of the conventional virtual synchronous generator control strategy, the overall system variable and disturbance variable are subjected to modeling by considering the actual operational state of the system, and a robust H-<transverse-8> control theory is introduced to realize frequency and voltage feedback control; a sliding mode control theory is further introduced, frequency and voltage tracking control can be realized on the basis of stable feedback control. The optimization control method fully considers active and reactive and load current changes of the system; on the basis, state space equation establishment of frequency and voltage is performed;the model takes a current voltage decoupling incomplete decoupling condition into full consideration, so that the method is applicable to a high-voltage power grid of an inductive circuit, as well asa low-voltage power distribution network of a resistance-inductance circuit; and meanwhile, the feedback is a feedback control method of a fixed structure, so that dynamic parameter adjustment is notneeded, and high operational reliability and stability is achieved.

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 Applications(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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