Technical Parameters of Intelligent Capacitor

Intelligent capacitors are integrated with intelligent control modules, fast switching and capacitor protection, and are designed with a compact structure, which can be flexibly configured to meet the user's demand for reactive power compensation. Comparison of the reactive power compensation system composed of intelligent capacitors and the reactive power compensation system composed of conventional capacitor products is shown in Table 1 below. Conventional capacitors constitute reactive power compensation system Intelligent capacitors constitute reactive power compensation system Reactive power compensation device Conventional capacitors, fuses, composite switches or mechanical contactors, thermal relays, intelligent controllers Intelligent capacitors (one independent use or multiple on-line use) Control mode Automatic control Automatic control or manual control Automatic control or manual control to realize over-zero switching (automatic control without the need to configure the controller) Parameter measurement Measurement Measurement of voltage, current, reactive power, power factor Measurement of voltage, current, reactive power, power factor, the three-phase current of each capacitor, capacitor body temperature Condition monitoring Capacitor switching state, over-underfill status, under-under-voltage status Capacitor switching state, under-underfill status, under-under-voltage status, type of protection action, self-diagnosis, and the status of protection action, and the type of protection action. Status, protection action type, self-diagnosis fault type Protection type Current cut, over-current protection, over-voltage protection, under-voltage protection Current cut, over-current protection, over-voltage protection, under-voltage protection, over-temperature protection of capacitors, phase break protection, three-phase imbalance protection Human-machine dialog Digital tube and keypad Display interface and keypad, rich in information content Installation and use Components are many in total type and number, and the structure is complex. Simple and convenient installation and wiring System Composition and Expansion Integral product design, one-time investment. It is difficult to adjust the compensation capacity after the product is molded. Modularized design of the product, easy to expand the compensation capacity, and can realize phased investment. Shape and weight Huge size and very heavy weight Compact structure and light weight.

Can be installed directly in the distribution cabinet. Reliability analysis The total number of components is large and numerous. Controller failure will lead to the failure of the whole compensation system. Smart capacitors automatically constitute the system work, single smart capacitor failure will automatically exit the system, does not affect the other smart capacitors work. High system reliability. Intelligent reactive power compensation intelligent capacitor is the intelligent reactive power compensation equipment for 0.4kV low voltage distribution network to reduce line loss, improve power factor, improve power quality and energy saving. The reactive power compensation program designed based on intelligent reactive power compensation controller can refer to the following principles. Nonlinear load ratio Reactive power compensation design scheme Three-phase balanced static load Three-phase unbalanced static load Three-phase balanced frequently changing load Three-phase unbalanced frequently changing load Nonlinear equipment in the load ≤ 15% of the transformer capacity (mainly linear loads) Three-phase ****complementation, composite switching over-zero switching, split-phase compensation or hybrid compensation,

Composite switching over-zero switching; Three-phase ****complementation. Thyristor switch dynamic switching Split-phase compensation or hybrid compensation,

The Thyristor switch dynamic switching; 15%<The ratio of non-linear equipment in the load ≤ 50% of the transformer capacity (the presence of a certain amount of harmonics) Three-phase ****supplementation

Compound switch over-zero casting

Capacitor circuit in series with 6% or 12%; filtering reactance Split-phase compensation or hybrid compensation

Capacitor circuit with 6% or 12% non-tuned filter reactance in series Three-phase*** compensation

Silicon controlled switching dynamic switching

Capacitor circuit with 6% or 12% non-tuned filter reactance in series Split-phase compensation or mixed compensation

Silicon controlled switching dynamic switching

Capacitor circuit with 6% or 12% non-tuned filter reactance in series 12% non-tuned filter reactance in series in the capacitor circuit Harmonics management target Destroy the parallel resonance of capacitor and system, partially absorb the 3rd, 5th, 7th and above harmonics in the system Destroy the parallel resonance of capacitor and system, partially absorb the 3rd, 5th, 7th and above harmonics in the system Destroy the parallel resonance of capacitor and system, partially absorb the 3rd, 5th, 7th and above harmonics in the system Destroy the parallel resonance of capacitor and system, partially absorb the 3rd, 5th, 7th and above harmonics in the system Destroy the parallel resonance of capacitor and system, partially absorb the 3rd, 5th, 7th and above harmonics in the system 3, 5, 7 and above harmonics in the system Ratio of non-linear equipment in the load >50% transformer capacity (presence of a large number of harmonics) Three-phase **** compensation

Compound switching with over-zero casting

Tuned filtering circuits made up of capacitors or reactors Split-phase or hybrid compensation

Compound switching with over-zero casting

Tuned tuned filtering circuits made up of capacitors or reactors Filter circuit Three-phase*** compensation

Silicon controlled switch dynamic switching

Tuned filter circuit by capacitor or reactance Split-phase compensation or hybrid compensation

Silicon controlled switch dynamic switching

Tuned filter circuit by capacitor or reactance