Published by Wendy Wang, Jiangsu Modern Electric Technology Co., Ltd.
The first developer of smart capacitor in China; Nantong, Jiangsu, China.
Smart capacitor integrates such advanced technologies as modern measure-control, power electronics, network communication, automation control, power capacitor and others. It changes the outdated controller technology of traditional reactive power compensation device and the switching technology that the outdated mechanical contactor or mechatronics switch is used to switch the capacitor, and also changes the bulky and heavy structure mode of the traditional reactive power compensation device, so that the new generation of low-voltage reactive power compensation equipment has better compensation effect, smaller volume, lower power consumption, lower price and cost saving, featuring more flexible in use, more convenient in maintenance, longer service life and higher reliability, which meets the higher requirements of reactive power compensation.
Smart Capacitor Composition
The smart capacitor is of modular design, which consists of high-quality capacitor, reactor, smart measurement and control module, switching switch module, circuit protection module and man-machine interaction module.
The intelligent capacitor can be used by a single unit or multiple units on line. It can replace the conventional automatic reactive power compensation device composed of smart control device, fuse, composite switch or mechanical contactor, thermal relay, low-voltage power capacitor, indicator light, etc.
|/||Reactive power compensation system composed of conventional capacitors||Reactive power compensation system composed of smart capacitors|
|Reactive power compensation device||Conventional capacitor, fuse, compound switch or mechanical contactor, thermal relay, intelligent controller||Smart capacitor (used by a single unit or multiple units online)|
|Control mode||Auto or manual control||Auto or Manual, realizing zero-crossing switching (auto control without a controller)|
|Parameter measurement||Measure voltage, current, reactive power factor, power factor||Measure voltage, current, reactive power factor, power factor, three-phase current of each capacitor, internal temperature of the capacitor|
|Status monitoring||Switching status, over or under compensation status, over or under voltage status||Switching status, over or under compensation status, over or under voltage status, protection action type, self-diagnosis fault type|
|Protection type||Current swift switch-off, over-current protection, over-voltage protection, under-voltage protection||Current swift switch-off, over-current protection, over-voltage protection, under-voltage protection, over temperature protection of the capacitor, phase loss protection, three-phase imbalance protection|
|Man-machine Dialog||Nixie tube and buttons||Display screen and buttons show rich information and content|
|Installation and use||Components: various in categories and greater in quantities and complex in structure||Simple in product structure, easy to install and make wiring|
|System composition and extension||Integrated product design, one-time investment. It is difficult to adjust the compensation capacity.||The product is of modular design, it’s easy to expand the compensation capacity, and the staged investment can be realized.|
|Appearance and weight||Huge size, very heavy weight||Compact structure, light weight. It can be installed in the electrical cabinet directly.|
|Reliability analysis||There are many kinds and quantities of components. The failure of the controller will cause the failure of the whole compensation system.||Smart capacitors can automatically constitute system to work, if a single smart capacitor breaks down, it will automatically exit the system, without affecting the operation of other smart capacitors, therefore, it has high system reliability.|