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Frequency adjustment method and device, equipment and storage medium

A frequency adjustment and frequency technology, applied in circuit devices, reducing/preventing power oscillation, controlling generators, etc., can solve the problems of inability to achieve effective generator protection and reduce the stability of generator systems.

Active Publication Date: 2021-08-13
广东电网有限责任公司韶关供电局
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, in the prior art, the stability of the generator system will be reduced for the self-shunt excitation system, and the effective protection of the generator cannot be realized

Method used

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  • Frequency adjustment method and device, equipment and storage medium
  • Frequency adjustment method and device, equipment and storage medium
  • Frequency adjustment method and device, equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] figure 1It is a flow chart of a frequency adjustment method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where the effective protection of generators is realized through the frequency change of small hydropower. This method can be executed by a hydropower frequency adjustment device. Specifically include the following steps:

[0056] Step 110. Acquire the average frequency of each group of hydropower frequencies within the forecast period, and sort the average frequencies in chronological order to form a frequency sequence.

[0057] Wherein, the prediction period may include at least one group of hydropower frequencies. The forecast period can be five minutes, and each minute within five minutes can be a group, that is, five groups of hydropower frequencies can be included in the five-minute forecast period.

[0058] The power frequency of the hydroelectric frequency can be 50Hz, that is, the hydroelectric frequency...

Embodiment 2

[0087] image 3 It is a flow chart of a frequency adjustment method provided by Embodiment 2 of the present invention. This embodiment is embodied on the basis of the foregoing embodiments. In this embodiment, the method may also include:

[0088] Step 310. Acquire the average frequency of each group of hydropower frequencies within the forecast period, and sort the average frequencies in chronological order to form a frequency sequence.

[0089] Wherein, the forecast period includes at least one group of hydropower frequencies.

[0090] In one embodiment, obtaining the average frequency of each group of hydropower frequencies within the forecast period may specifically include:

[0091] Determine the start frequency and the end frequency in each group of detection periods in the forecast period; calculate the average value of each described start frequency and each described end frequency, and obtain each described average frequency.

[0092] Wherein, as described in the p...

Embodiment 3

[0124] Figure 4 It is a structural diagram of a frequency adjustment device provided by Embodiment 3 of the present invention. This device can be applied to the situation where effective protection of hydropower frequency is realized through the frequency change of small hydropower, and the protection efficiency is improved. The device can be realized by software and / or hardware, and is generally integrated in computer equipment.

[0125] Such as Figure 4 As shown, the device includes:

[0126] The acquisition module 410 is used to obtain the average frequency of each group of hydropower frequencies in the forecast period, and sort each of the average frequencies in time order to form a frequency sequence, wherein the forecast period includes at least one group of hydropower frequencies;

[0127] The recombination module 420 is used to recombine each of the average frequencies to obtain a prediction sequence composed of recombination frequencies;

[0128] Determining modu...

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PUM

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Abstract

The invention discloses a frequency adjustment method and device, equipment and a storage medium. The method comprises the steps of: obtaining the average frequency of each group of hydropower frequencies in a prediction period comprising at least one group of hydropower frequencies, and sorting the average frequencies according to a time sequence to form a frequency sequence; recombining the average frequencies to obtain a prediction sequence formed by recombined frequencies; determining predicted values of the hydroelectric frequencies in the next period based on a corresponding relation between each recombined frequency in the prediction sequence and each piece of time information; and comparing the predicted values with standard predicted values, and adjusting the hydroelectric frequencies according to the relationship between the predicted values and the standard predicted values. According to the method provided by the above technical schemes, the prediction sequence is determined, the predicted values of the hydroelectric frequencies in the next period are determined according to the corresponding relation between the recombined frequencies in the prediction sequence and the time information; the predicted values are compared with the standard predicted values, so that the hydroelectric frequencies can be adjusted in advance, and effective protection of a generator is achieved.

Description

technical field [0001] Embodiments of the present invention relate to hydropower technology, and in particular to a frequency adjustment method, device, equipment and storage medium. Background technique [0002] At this stage, the stability of small hydropower station operation occupies an increasingly important position. Most generators of small hydropower stations use electromagnetic relays for protection. Generally, it consists of conventional over-current, over-voltage, over-load and other methods. Even the generators of individual small hydropower stations are not equipped with any secondary protection devices at all. Half of the step-up transformers of small hydropower stations are protected by low-voltage blocking overcurrent and overload protection, and the step-up transformers of other small hydropower stations do not have special protection devices, and only rely on the installation of drop insurance on the high-voltage side to protect the transformers and grid ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/24H02P9/00
CPCH02J3/004H02J3/241H02P9/006H02J2300/20
Inventor 欧阳本凯黄伟贾恒杰刘配配成展强
Owner 广东电网有限责任公司韶关供电局