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A mains power failure detection method, electronic device, storage medium and energy storage system

A mains power failure and detection method technology, applied in the field of energy storage systems, can solve the problems affecting detection accuracy, long detection time, poor anti-disturbance ability, etc., and achieves good anti-disturbance performance, good real-time judgment, and high accuracy. Effect

Active Publication Date: 2022-06-17
SHENZHEN HELLO TECH ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the difference is used instead of the derivative, the sampling rate is required to be high enough, and the anti-disturbance ability is poor
The literature (Zhang Qingchao, Xiao Yulong, an improved voltage sag detection method [J], Chinese Journal of Electrotechnical Society) pointed out that the improved αβ transformation detection method has detection delay, and the data does not have simultaneity, which makes the detection time of this method relatively long , the real-time performance is not good enough, and there is a short-term disturbance in the detection waveform, which affects the detection accuracy

Method used

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  • A mains power failure detection method, electronic device, storage medium and energy storage system
  • A mains power failure detection method, electronic device, storage medium and energy storage system
  • A mains power failure detection method, electronic device, storage medium and energy storage system

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Embodiment 1

[0039] like figure 1 It is a schematic flow chart of a method for detecting a mains power failure.

[0040] Exemplarily, the mains power failure detection method can be used in an energy storage system.

[0041] like figure 1 As shown, the mains power failure detection method includes the following steps:

[0042] Step S110: Acquire a first sampled value and a second sampled value of the commercial power voltage, where the second sampled value is a voltage sampled value at a moment after the first sampled value.

[0043] For example, at a certain moment, the first sampling value Vo(k) of the mains voltage is obtained, which is the mains voltage sampling value obtained at the kth sampling point; at a later moment, the mains voltage sampling at the k+1th sampling point is obtained The value is the second sample value Vo(k+1).

[0044] As a preferred embodiment, the sampling interval between the first sampling value and the second sampling value is a preset value. The time d...

Embodiment 2

[0087] like figure 2 An electronic device shown in the figure includes a memory 210, a processor 220 and a program stored in the memory 210, the program is configured to be executed by the processor 220, and the above-mentioned mains power failure detection is realized when the processor 220 executes the program. steps of the method.

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Abstract

The invention discloses a mains power failure detection method, electronic equipment, a storage medium and an energy storage system, wherein the method includes: acquiring a first sampled value and a second sampled value of the mains voltage, the second sampled value being the first The voltage sampling value at a moment after the sampling value; phase-locking calculation is performed on the difference between the second sampling value minus the first sampling value; the mains voltage amplitude is calculated according to the result of the phase-locking calculation; A utility power outage has occurred. Multiply the phase-locked signal by the difference between the two sampling values ​​before and after the mains voltage, and then calculate the mains voltage amplitude according to the result of the phase-locked calculation, and judge whether the mains voltage occurs according to the calculated mains voltage amplitude Power failure; low complexity, good real-time judgment, good anti-disturbance performance, and high accuracy.

Description

technical field [0001] The invention relates to energy storage system technology, in particular to a mains power failure detection method, electronic equipment, storage medium and energy storage system. Background technique [0002] In order to ensure a stable and high-quality power supply, energy storage systems need to be applied in many occasions, such as uninterruptible power supply UPS (Uninterruptible Power System / Uninterruptible Power Supply). Intermittent power supply UPS supplies power to maintain the normal operation or normal shutdown of the load. [0003] There are many existing methods for judging mains power failure, but none of these methods are ideal. For example, in the literature (Yang Yafei, Yan Xiangwu, Lou Yaolin, A new method for detecting voltage sag characteristics [J], Power System Automation), the single-phase voltage is set as the α-axis component, and the β-axis voltage component is fabricated, and then d-q transformation is performed , a delay ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/04
CPCG01R19/04
Inventor 陈俊丰楚婷孙中伟
Owner SHENZHEN HELLO TECH ENERGY CO LTD