Early warning method and system of intelligent capacitor

A capacitor and intelligent technology, applied in the field of electric power, can solve the problems of not making full use of computing power, not being able to provide decision-making basis for smart capacitor replacement, and not being able to analyze and predict the life value of smart capacitors, etc.

Active Publication Date: 2020-01-10
ZHEJIANG NANDA ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology can only display the basic data of smart capacitors, and only give an alarm for equipment failures. However, for smart capacitors whose capacitance decay exceeds the standard and has no faults, it cannot be judged whether to replace them,

Method used

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  • Early warning method and system of intelligent capacitor
  • Early warning method and system of intelligent capacitor
  • Early warning method and system of intelligent capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the existing technology, the metallized film capacitor core with non-inductive winding is used inside the low-voltage smart capacitor body. During the power-on operation process, due to the self-healing characteristics of the metallized film, the capacity of the capacitor core will continue to decay. If the capacity decays to a certain extent, it will affect the effect of reactive power compensation.

[0037] In the case of no power supply, engineers and technicians can use the capacitance measuring instrument to measure the capacitance value of the smart capacitor under test, and judge whether it meets the standard by the difference from the rated value. However, in the case of power on, the capacitance value of the smart capacitor under test can only be calculated by measuring the voltage and current between the terminals of the capacitor under test. And because it is customary to use the rated reactive capacity of the capacitor to replace the specific capacitance ...

Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that in this embodiment, the smart capacitor is a sub-compensation smart capacitor, and the smart capacitor early warning method provided in this embodiment includes the following steps:

[0057] Step S21: Obtain the operating parameters of the sub-compensation smart capacitor, including the nominal voltage of each phase capacitor in the sub-compensation smart capacitor, the current value of each phase when the sub-compensation smart capacitor is running, the phase-to-phase voltage of the power grid when the sub-compensation smart capacitor is running, The reactance rate of the reactor in the split-compensation smart reactor and the nominal capacity of the split-compensation smart capacitor.

[0058] Step S22: Calculate the life value of the supplementary intelligent capacitor according to the obtained operating parameters, and the calculation formula of the life value is:

[0059]

[0060] In this embodiment...

Embodiment 3

[0085] This embodiment provides an early warning system for smart capacitors, which is used to implement the early warning method for smart capacitors in Embodiment 1 or Embodiment 2, including:

[0086] A parameter acquisition module is used to acquire the operating parameters of the smart capacitor;

[0087] A calculation module, used to calculate the life value of the smart capacitor according to the obtained operating parameters, and calculate the power factor of the circuit after the smart capacitor is put into use;

[0088] A display module is used to display the calculation result of the calculation module;

[0089] The judging module is used to set the life threshold of the smart capacitor, compare the life threshold of the smart capacitor with the life value of the smart capacitor obtained by the calculation module, and judge whether the power factor is qualified;

[0090] The alarm module provides an early warning according to the judgment result of the judgment mod...

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Abstract

The invention discloses an early warning method and system of an intelligent capacitor, and relates to the technical field of electric power. The method comprises the following steps of obtaining theoperation parameters of the intelligent capacitor, calculating a life value of the intelligent capacitor according to the operation parameters, setting a life threshold value of the intelligent capacitor, comparing the life threshold value with the life value, and performing early warning according to a comparison result. According to the early warning method and system of the intelligent capacitor, when the intelligent capacitor has no fault, but the capacitance attenuation exceeds the standard, a prompt is timely given to a user, and a decision basis for replacing the intelligent capacitor is provided for the user.

Description

【Technical field】 [0001] The invention relates to the field of electric power technology, in particular to an early warning method and an early warning system for an intelligent capacitor. 【Background technique】 [0002] With the wide application of the Internet and the industrial Internet of Things platform, the operating status and operating parameters of the smart capacitors in the reactive power compensation device can be displayed on the platform. The networking platform can observe parameters such as whether the smart capacitor in the reactive power compensation device is put into use, the current after being put in, the effect of reactive power compensation after being put in, and equipment failures anytime and anywhere. The existing technology can only display the basic data of smart capacitors, and only alarms for equipment failures, but cannot judge whether to replace smart capacitors with excessive capacity attenuation and no faults, and cannot use existing data t...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06G06F17/18
CPCG06Q10/04G06Q10/0639G06Q50/06G06F17/18Y02E40/30
Inventor 刘维城王奔陈潇郑坚戴珏珺
Owner ZHEJIANG NANDA ELECTRICAL
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