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Synchronous inverter control method, device and system

A technology of synchronous inverters and control devices, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of poor reliability and achieve the effect of high control reliability and guaranteed power quality

Active Publication Date: 2022-04-12
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
  • Synchronous inverter control method, device and system
  • 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 application relates to a synchronous inverter control method, device, and system, including: a power calculation module; an active frequency control module that performs proportional integral calculations based on active power and preset active parameters to obtain the virtual output voltage phase of the inverter; The reactive voltage adjustment module obtains the primary regulation voltage amplitude of the inverter according to the reactive power and the preset reactive parameters; the modulation module generates corresponding signals to the inverter according to the virtual output voltage phase and the primary regulation voltage amplitude. The power switch tube is controlled. When the above synchronous inverter control device, method and system perform active frequency control, the frequency of the inverter is controlled proportionally and integrally according to the active power and preset active parameters, so that each active power control module can independently change its own output, It realizes the error-free adjustment of the frequency, effectively guarantees the power quality during off-grid operation, and has the advantage of high control reliability compared with the traditional inverter control system.

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 Patents(China)
IPC IPC(8): H02J3/48H02J3/50
CPCH02J3/48H02J3/50
Inventor 张涛
Owner EAST GRP CO LTD
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