Modular capacitor capacity expansion system

Abstract

The invention belongs to the technical field of capacitors, and particularly relates to a modular capacitor capacity expansion system. A capacitor module is used for adjusting system capacitor expansion; a test module is used for testing the capacitor damage condition in the operation process; a monitoring module is used for monitoring abnormal data information in the system; the operation monitoring module is used for monitoring system operation power in different time periods; the alarm module is used for receiving abnormal information data sent by a server; the server is used for summarizing, analyzing and processing the capacitance adjustment information sent by a capacitance module, the result of a tested capacitor damage condition sent by the test module, the abnormal data information sent by the monitoring module and the operation power information which is sent by the operation monitoring module and is used for monitoring different time periods; the capacitor state can be effectively monitored in real time, whether the capacitor is damaged or not is detected and judged in real time through mutual coordination of an automatic system, the maintenance efficiency is greatly improved, and the detection is accurate and is not influenced by the environment.

Description

technical field [0001] The invention belongs to the field of capacitors, in particular to a modular capacitor expansion system. Background technique [0002] A capacitor is two conductors close to each other with a non-conductive insulating medium in between. A capacitor stores charge when a voltage is applied between its two plates. The capacitance of a capacitor is numerically equal to the ratio of the amount of charge on a conductive plate to the voltage between the two plates. The basic unit of capacitance of a capacitor is farad (F). Capacitive elements are usually represented by the letter C in circuit diagrams. [0003] The traditional low-voltage reactive power compensation device controls multiple capacitors through a controller, and the capacitors are connected to the grid through fuses and AC contactors, thereby realizing low-voltage reactive power centralized compensation. However, due to the diversity of distribution network users and the complexity of loads...

AI Technical Summary

Problems solved by technology

However, due to the diversity of distribution network users and the complexity of loads, the requirements for power quality are getting higher and higher. This centralized reactive power compensation method also has certain drawbacks, mainly in the following aspects: 1. When the controller fails, the entire reactive power compensation system will be paralyzed, and the reliability of the system will be reduced; second, the flexibility of the reactive power compensation device is poor, and when the reactive power capacity required by the system increases, it will be troublesome to expand; Occasionally limited, it is only applicable to centralized reactive power compensation, and cannot be applied to distributed reactive power compensation occasions

[0004] In the prior art, the application of capacitor parallel expansion is very common, and there is no good system to replace manual detection for the problems generated in the process of capacitor parallel expansion, so as to realize the intelligent expansion system monitoring; the parallel capacitor in the prior art has the following defects :

[0005] 1. It is impossible to monitor the change of capacitance in real time. It will only be detected and judged after the damage of other electrical components due to the damage of the capacitor for a period of time, and it cannot be monitored in real time;

[0006] 2. The capacitor detection method cannot achieve automatic control, and manual detection and judgment are required, which consumes a lot of time, and the detection data may be inaccurate due to improper selection methods, and accurate detection and accurate judgment cannot be achieved;

[0007] 3. When the environment where the capacitor is located changes, real-time detection and alarm reminders cannot be achieved;

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