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Method and device for power factor assessment

A power factor and electric power technology, applied in the field of electric power, can solve problems such as unbalanced power consumption of reactive loads, reduction of power supply capacity of power transformation and transmission facilities, system voltage fluctuations, etc., to stabilize the system voltage level and reduce line reactive power Flow, the effect of improving the power factor

Inactive Publication Date: 2018-11-23
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, it has been found that with this assessment method, there will often be unbalanced power consumption of reactive loads in the second half or the first half of the month, resulting in system voltage fluctuations and reducing the power supply capacity of power transformation and transmission facilities.

Method used

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  • Method and device for power factor assessment
  • Method and device for power factor assessment
  • Method and device for power factor assessment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see figure 2 , figure 2 It is a schematic flowchart of the power factor assessment method provided by Embodiment 1 of the present invention. Such as figure 2 As shown, the power factor assessment method includes the following steps:

[0052] S101. Obtain a detection result of the power consumption of the assessment object by the detection device within a preset time period; wherein, the detection result includes a power factor.

[0053] In the embodiment of the present invention, the power factor (Power Factor) is the ratio of the effective power divided by the total power consumption, and is used to measure the degree of effective utilization of electric power. The larger the power factor value, the better the power utilization efficiency.

[0054] In the embodiment of the present invention, the preset time period can be 10 minutes, 20 minutes, 30 minutes, etc. less than 1 day, and can be manually set by the assessor, or can be set automatically, and is not limi...

Embodiment 2

[0069] see image 3 , image 3 It is a schematic flowchart of the power factor assessment method provided by Embodiment 2 of the present invention. in, image 3 The power factor test method shown is given by figure 2 The power factor assessment method shown is optimized. Such as image 3 As shown, the power factor assessment method includes the following steps:

[0070] S201. Obtain a detection result of the power consumption of the assessment object by the detection device within a preset time period; wherein, the detection result includes a power factor.

[0071] In the embodiment of the present invention, the violation data includes one or more of the power factor, the current number of violations, the location of the assessment object, the time of detecting the power factor, and the identification of the device for detecting the power factor, which is not limited in the embodiment of the present invention.

[0072] S202. Determine whether the power factor is lower t...

Embodiment 3

[0096] see Figure 4 , Figure 4 It is a schematic structural diagram of the power factor assessment device 60 provided by Embodiment 3 of the present invention. Such as Figure 4 As shown, the power factor checking device 60 includes:

[0097] The obtaining module 301 is configured to obtain the detection result of the electric power consumption of the assessment object by the detection device 50 within a preset time period; wherein, the detection result includes a power factor.

[0098] The first judging module 302 is configured to judge whether the power factor is lower than a preset power factor threshold.

[0099] Statistical storage module 303, for when the first judging module 302 judges that the power factor is lower than the preset power factor threshold, increase the number of violations of the assessment object once to obtain the current number of violations, and store the violation data of the assessment object, the violation The data includes the current numbe...

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Abstract

The invention discloses a method and device for power factor assessment. The method for power factor assessment comprises the steps: obtaining a test result of test equipment for an electric power ofan assessment object by a preset time period, wherein the test result comprises the power factor; judging whether the power factor is lower than a preset power factor threshold or not; if the power factor is lower than the preset power factor threshold, increasing the number of times of violations of the assessment object once, and obtaining the current number of times of violations, and storing the violation data of the assessment object, wherein, the violation data comprise the current number of times of violations; judging whether the current number of times of violations is greater than the preset number of times of thresholds; and if the current number of times of violations is greater than the preset number of times of thresholds, sending the violation number of times to a communication device corresponding to the assessment object. The voltage level of the system can be stabilized, thereby the power supply capability of the power transformation and power transmission equipment is improved, according to the method for power factor assessment provided by the present invention.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a power factor assessment method and device. Background technique [0002] With the continuous development of industry, the reactive power consumption of industrial equipment (such as motors, transformers, frequency conversion equipment, etc.) adopted by many large-scale enterprises is very large. has an important influence. In order to improve the power factor of electric energy used by electricity users, reduce the flow of reactive power on the line, and stabilize the system voltage level, the power company assesses the power factor of large-scale electricity-consuming enterprises to improve the power factor of electric energy used by large-scale electricity-consuming enterprises. The existing assessment method is: to assess the power factor of large-scale power-consuming enterprises on a monthly basis. However, in practice, it has been found that with this assessment method, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 彭杰
Owner GUANGDONG POWER GRID CO LTD
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