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Synchronous inverter control method, device and system

A technology of synchronous inverter and control device, applied in the direction of parallel feeding arrangement of a single network, can solve problems such as poor reliability, achieve the effect of high control reliability and ensure power quality

Active Publication Date: 2019-01-11
EAST GRP CO LTD
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Problems solved by technology

[0004] Based on this, it is necessary to provide a synchronous inverter control method, device and system for the problem of poor control reliability of the traditional virtual synchronous generator control system

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  • Synchronous inverter control method, device and system

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Embodiment Construction

[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0029] see figure 1 , a synchronous inverter control device, including a power calculation module 100 , an active frequency control module 200 , a reactive voltage regulation module 300 and a modulation module 400 . The power calculation module 100 is used to obtain the output voltage and output current of the inverter, and calculate the active power and reactive power of the inverter according to the output voltage and output current.

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Abstract

The invention relates to a synchronous inverter control method, device and system. The device includes a power calculation module. The active frequency control module performs proportional integrationoperation according to the active power and the preset active power parameters to obtain the virtual output voltage phase of the inverter. According to the reactive power and the preset reactive power parameters, the reactive power and voltage regulation module obtains the amplitude of the primary regulation voltage of the inverter. The modulation module generates the corresponding signal to control the inverter power switch transistor according to the virtual output voltage phase and the primary regulating voltage amplitude. A synchronous invert control device A method and system for activefrequency control, according to the active power and preset active power parameters, the frequency of the inverter is controlled by PI, so that each active power control module can change its own output independently and realize the frequency regulation without difference, which effectively ensures the power quality in off-grid operation. Compared with the traditional inverter control system, theinverter has the advantages of high control reliability.

Description

technical field [0001] The present application relates to the technical field of micro-grid control, in particular to a synchronous inverter control method, device and system. Background technique [0002] With the development of renewable energy, microgrid systems are widely used to solve the problem of distributed power grid connection. The traditional power system is dominated by synchronous generators, which provide inertia and damping for the power system to ensure the stable operation of the power system. At the same time, under the action of the excitation, governor and other control links, the frequency and voltage can be adjusted more conveniently. Inspired by the traditional power system operation, a virtual synchronous generator (Virtual Synchronous Generator, VSG) control strategy is proposed and applied to the microgrid system. [0003] The virtual synchronous generator refers to a control strategy that simulates the external characteristics of the synchronous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/50
CPCH02J3/48H02J3/50
Inventor 张涛
Owner EAST GRP CO LTD
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