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Transient active control method of 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., and can solve the problems of DC current increase, system impact, drop, etc.

Active Publication Date: 2020-10-30
HUAZHONG UNIV OF SCI & TECH +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Transient active control method of energy storage power station
  • Transient active control method of energy storage power station
  • Transient active control method of 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 more clear, 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 may 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 . ...

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Abstract

The invention discloses a transient active power control method for an energy storage power station, and belongs to the technical field of multi-infeed extra-high voltage AC / DC hybrid power grids, andthe control method comprises the steps: continuously detecting the real-time DC current of an inversion side and the AC bus voltage of the inversion side; when the real-time direct current is greaterthan a first current threshold value or the alternating current bus voltage is less than a voltage threshold value, controlling the energy storage power station to enter a transient control mode; determining an output time instruction corresponding to the energy storage active output by using the size relationship between the real-time direct current and a first current threshold value and a second current threshold value, wherein the first current threshold value is greater than the second current threshold value; determining by utilizing the size relationship between the alternating currentbus voltage and the voltage threshold value; and sending an energy storage active instruction of the target output amplitude to the energy storage power station at the target output moment accordingto the output time instruction and the output amplitude instruction. According to the control method provided by the invention, the energy storage active power output is applied to the field of commutation failure suppression, and the continuous commutation failure after the DC fault can be effectively suppressed.

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 Applications(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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