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Virtual synchronous inverter control method and storage medium capable of suppressing active power oscillation

A virtual synchronization and control method technology, applied in the direction of reducing/preventing power oscillation, AC network circuit, single network parallel feeding arrangement, etc., can solve problems such as system instability, achieve low hardware requirements, improve stability, and improve accuracy equally divided effect

Active Publication Date: 2021-08-24
HUNAN UNIV
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Problems solved by technology

[0009] The present invention provides a virtual synchronous inverter control method and storage medium capable of suppressing active power oscillation, which can solve the technical problem of making the system unstable in the prior art

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  • Virtual synchronous inverter control method and storage medium capable of suppressing active power oscillation
  • Virtual synchronous inverter control method and storage medium capable of suppressing active power oscillation
  • Virtual synchronous inverter control method and storage medium capable of suppressing active power oscillation

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Embodiment Construction

[0042] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0043] The virtual synchronous control strategy is a new grid-connected control strategy based on the second-order model of the hidden-pole synchronous generator. Compared with the traditional inverter, the virtual synchronous inverter simulates the rotor equation of the synchronous motor, and combines the energy storage function of the DC b...

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Abstract

The invention provides a virtual synchronous inverter control method and a storage medium capable of suppressing active power oscillation, which can solve the technical problem of making the system unstable in the prior art. Including: adding a virtual damping control algorithm to the active power control loop, extracting low-frequency oscillation components, adjusting the electromagnetic torque of the active power control loop, and weakening the active oscillation of the virtual synchronous inverter; adding a virtual damping control algorithm to the reactive power control loop The impedance control algorithm adjusts the output voltage modulation signal of the reactive power control loop, reduces the coupling of active power and reactive power, and realizes the condition of equal sharing of instantaneous power increments, thereby suppressing the excitation of active oscillation; the present invention can suppress oscillation excitation and enhance The two aspects of virtual synchronous inverter's own damping solve the problem of virtual synchronous inverter active power oscillation when the load fluctuates, and ensure that the performance of accurate equalization of active power and reactive power is improved while suppressing oscillation, ensuring the PCC point The voltage is stable.

Description

technical field [0001] The present invention relates to the technical field of inverter control, in particular to a virtual synchronous inverter control method and a storage medium capable of suppressing active oscillation. Background technique [0002] The virtual synchronous inverter used to simulate a conventional synchronous machine is a grid-friendly inverter. The virtual synchronous inverter has inertia characteristics, which makes it have great advantages in suppressing the high frequency fluctuation of the system frequency and maintaining the stability of the system frequency. The introduction of inertia is the fundamental reason for the virtual synchronous inverter to achieve fast response of output power and suppression of high frequency jitter. However, it is the introduction of inertia that also makes the virtual synchronous inverter have the characteristics of less damping similar to the synchronous generator system, making it prone to active power oscillation....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/50H02J3/24
CPCH02J3/24H02J3/48H02J3/50H02J2203/20
Inventor 帅智康沈霞黄文何梨梨李艺丰吴宇翔
Owner HUNAN UNIV
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