A transient active power control method for an energy storage power station

A technology of energy storage power station and control method, which is applied in the direction of circuit devices, electrical components, AC network circuits, etc., can solve problems such as drop, increase of DC current, system impact, etc., to suppress continuous commutation failure and improve transient control effect , The effect of preventing the rapid drop of DC voltage

Active Publication Date: 2022-02-15
HUAZHONG UNIV OF SCI & TECH +1
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  • Claims
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Problems solved by technology

After the commutation failure occurs, the DC voltage drops rapidly and the DC current increases sharply, causing serious impact on the system, and even causing the transmission power to be interrupted

Method used

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  • A transient active power control method for an energy storage power station
  • A transient active power control method for an energy storage power station
  • A transient active power control method for an energy storage power station

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0039] The present invention provides a transient active power control method of an energy storage power station, such as figure 1 As shown, the transient active power control method of the energy storage power station includes: step S1 to step S4.

[0040] S1: Continuously detect the real-time DC current I on the inverter side d_inv and the AC bus voltage U on the inverter side AC_RMS . Whe...

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Abstract

The invention discloses a transient active power control method of an energy storage power station, which belongs to the technical field of multi-feed UHV AC / DC hybrid power grids. The control method includes: continuously detecting the real-time DC current on the inverter side and the inverter side AC bus voltage; when the real-time DC current is greater than the first current threshold or the AC bus voltage is lower than the voltage threshold, control the energy storage power station to enter the transient control mode; use the real-time DC current and the first current threshold and the second current threshold between The size relationship determines the output time command corresponding to the active output of the energy storage. The first current threshold is greater than the second current threshold; it is determined by the size relationship between the AC bus voltage and the voltage threshold; The power station issues the energy storage active power command of the target output range. The control method provided by the present application applies the energy storage active output to the field of commutation failure suppression, and can effectively suppress continuous commutation failure after a DC fault.

Description

technical field [0001] The invention belongs to the technical field of multi-infeed UHV AC / DC hybrid power grid, and more specifically relates to a transient active power control method of an energy storage power station. Background technique [0002] With the continuous investment of high-voltage DC transmission projects, the characteristics of "strong DC and weak AC, multiple DC centralized feed-in" of my country's power grid have become increasingly prominent, and the supporting capacity of the receiving-end grid has declined, and AC system failures may induce continuous commutation failures in individual converter stations , which seriously threatens the safety of the AC-DC hybrid power grid under the new form of my country. [0003] Electrochemical energy storage not only has the technical advantages of strong environmental adaptability, short construction period and decentralized configuration, but also has the technical characteristics of fast response and two-way regu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/36
CPCH02J3/32H02J3/36H02J2203/20H02J2003/365Y02E60/60
Inventor 姚伟周泓宇李培平文劲宇高东学李程昊张景超
Owner HUAZHONG UNIV OF SCI & TECH
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