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Commercial power outage detection method, electronic equipment, 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 of long detection time, affecting detection accuracy, poor anti-disturbance ability, etc., and achieves good real-time judgment, good anti-disturbance performance, and high accuracy. Effect

Active Publication Date: 2019-01-08
SHENZHEN HELLO TECH ENERGY CO LTD
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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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  • Commercial power outage detection method, electronic equipment, storage medium and energy storage system
  • Commercial power outage detection method, electronic equipment, storage medium and energy storage system
  • Commercial power outage detection method, electronic equipment, storage medium and energy storage system

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Effect test

Embodiment 1

[0039] Such as figure 1 It is a schematic flowchart of a detection method for mains power failure.

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

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

[0042] Step S110, acquiring a first sampled value and a second sampled value of the mains 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 sampling value of the mains voltage obtained at the k sampling point; at a later time, the sampling value of the mains voltage at the k+1 sampling point is obtained The value is the second sampled value Vo(k+1).

[0044] As a preferred implementation manner, the sampling interval between the first sampling value and the second sampling value is a prese...

Embodiment 2

[0087] Such as figure 2 An electronic device shown 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. When the processor 220 executes the program, the above-mentioned commercial power failure detection is realized. method steps.

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Abstract

The invention discloses a commercial power outage detection method, electronic equipment, a storage medium and an energy storage system, wherein the method comprises the following steps of acquiring afirst sampling value and a second sampling value of a commercial power voltage, wherein the second sampling value is a voltage sampling value at the next moment after the first sampling value; carrying out phase locking calculation on a difference value obtained by subtracting the first sampling value from the second sampling value; calculating a commercial power voltage amplitude value accordingto the result of the phase locking calculation; and judging whether commercial power outage occurs or not according to the commercial power voltage amplitude value. The difference value of the two sampling values before and after the commercial power voltage is multiplied with the phase locking signal, and a commercial power voltage amplitude value is calculated according to the result of phase locking calculation; next, whether commercial power outage occurs or not is judged according to the calculated commercial power voltage amplitude value; and therefore, the complexity is relatively low,the judgment real-time performance is high, the anti-disturbance performance is relatively high, and the accuracy is high.

Description

technical field [0001] The invention relates to energy storage system technology, in particular to a detection method for mains power failure, electronic equipment, a storage medium and an energy storage system. Background technique [0002] In order to ensure a stable and high-quality power supply, many occasions require the application of energy storage systems, such as UPS (Uninterruptible Power System / Uninterruptible Power Supply), etc., when the normal power supply, such as mains power failure, can be switched to uninterruptible UPS supplies power intermittently to maintain the normal operation of the load or shut it down normally. [0003] There are many existing methods for judging mains power failure, but these methods are not very ideal. For example, in the literature (Yang Yafei, Yan Xiangwu, Lou Yaolin, a new detection method of voltage sag characteristic quantity [J], power system automation), the single-phase voltage is set as the α-axis component, and the β-ax...

Claims

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Application Information

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