Energy storage inverter, control method and device thereof and computer readable storage medium

A technology of energy storage inverter and control method, which is applied in the direction of converting irreversible DC power input into AC power output, wind power generation, AC network load balancing, etc., and can solve problems such as the uneven switching process of on-grid and off-grid, and achieve The effect of improving capacity utilization efficiency, preventing sudden changes, and improving dynamic response capability

Pending Publication Date: 2022-05-31
SEARI ELECTRIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Embodiments of the present application provide an energy storage inverter and its control method, device, and compute

Method used

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  • Energy storage inverter, control method and device thereof and computer readable storage medium
  • Energy storage inverter, control method and device thereof and computer readable storage medium
  • Energy storage inverter, control method and device thereof and computer readable storage medium

Examples

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Example Embodiment

The required details obscure the description of this application. Therefore, the present application is not intended to be limited to the embodiments shown, but is intended to be consistent with

The required details obscure the description of this application. Therefore, the present application is not intended to be limited to the embodiments shown, but is intended to be consistent with

[0062] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0063] The use of "suitable for" or "configured to" in this application means open and inclusive language that does not preclude suitable

[0064] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." described in this application as

greater volatility. Photovoltaic power generation is the use of solar energy to generate electricity. The power generation process can only be carried out during the day and cannot be carried...

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Abstract

The embodiment of the invention provides an energy storage inverter control method. The method comprises the steps of obtaining an output current of a pre-constructed virtual synchronous generator; acquiring a synchronous angular velocity of a power grid and a voltage value of a common coupling point, wherein the common coupling point is a coupling point of the power grid and the energy storage inverter; determining whether the synchronous angular velocity of the power grid and the voltage value of the common coupling point are in an allowable range; in response to determining that the synchronization angular velocity of the power grid and/or the voltage value of the common coupling point are/is not in an allowable range, inputting a power regulation instruction to the virtual synchronous generator so as to update the output current of the virtual synchronous generator; and determining instruction current according to the output current of the virtual synchronous generator, and updating the output state of the energy storage inverter according to the instruction current.

Description

technical field [0001] The present application relates to the technical field of grid-connected inverter control, and in particular to an energy storage inverter and its control method, device, and computer-readable storage medium. Background technique [0002] As a link between distributed power sources such as photovoltaic power and wind power and the grid, the grid-connected inverter is a power electronic device with almost no moment of inertia, so it is difficult to participate in grid regulation. Drawing on the operating experience of traditional power systems, the control strategy based on Virtual Synchronous Generator (VSG) is applied to the control of grid-connected inverters. VSG can increase the inertia of grid-connected inverters, but the commonly used control methods are greatly affected by feedback errors, making it difficult to achieve smooth switching between grid-connected and off-grid inverters, which may easily cause grid system instability. Contents of t...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/28H02M7/48
CPCH02J3/38H02J3/28H02M7/48Y02E10/76
Inventor 何大清
Owner SEARI ELECTRIC TECH
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