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

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...

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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

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