低压无功补偿装置 SVC

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产品简介
Brief introduction to the products

SVC型低压 无功自动补偿装置主要用于户外电力变压器低压侧的无功功率补偿。由电容器、滤波电抗器、接触器、复合开关、熔断器、功率因数自动控制器、主开关、通风系统及柜体组成。它对提 高系统电压水平、降低线路损耗、改善系统功率因数、提高电 力变压器的利用率、增强系 统电压稳定性起着十分重要的作用。具有响应及时迅速、运行无功耗、并有效 地抑制合闸涌流,提高了 无功补偿装置的运行安全性能。本装置还具有过压、欠压、过流、短路、缺相等保护功能,并可显示三相电压、电流、有功功率、无功功率、功率因数、控制参数等。广泛适用于住宅小区、工矿、企业、医疗、科研、油煤田、石化及其它公用设施,特别是电焊机、点焊机、吊车等 大功率且启动频繁的工业设备。

The SVC Low-Voltage Reactive Power Automatic Compensation Device is mainly used for the reactive power compensation at the low-voltage side of the outdoor power transformer and is composed of condenser, filter reactor, contactor, compound switch, fuse, power factor automatic controller, main switch, ventilation system and cabinet. It plays an important part in increasing the voltage level of the system, reducing the loss of the lines, improving the power factor of the system, increasing the utilization ratio of the power transformer and strengthening the stability of the system voltage. It is characterized by its rapid and timely response, operation free from power consumption and suppressing the switch closing surging current to improve the operation safety of the reactive power compensation device. The device features also the protection function of the overvoltage, undervoltage, overcurrent, short circuit and  phase default and can display three phase voltage, current, active power, reactive power, power factor and control parameters. It is widely used in residential quarters, industrial and mining enterprises, hospitals, scientific research, coal and oil fields, petrochemical and other public facilities, especially electric welding, spot welding, cranes and other high power frequently starting industrial equipment.

产品引用标准
Standards for Product

IEC-493-1          《低压成 套开关设备和控制设备》,

GB7251             《低压成套开关设备》,

GB/T15576          《低压无 功功率静态补偿装置总技术条件》


IEC-493-1  “Low Voltage Switchgear Assembly and Control Equipment”,

GB7251  “Low Voltage Switchgear Assembly”,

GB/T15576  “General Technical Conditions of Low Voltage Reactive Power Static Compensation Device”.


结构特点及功能
Structural Characteristics and Functions

补偿精度高 

补偿后 的系统功率因数优于0.98~0.99(或设计值); 

响应速度快 

对于50Hz电网,系统响应时间不超过4 ms,完成一 次投切过程不超过20ms,投切频 率随用户用电负荷的变化而实现动态补偿(可达50次/秒)。 

投切无“污染” 

可控硅 组采用进口可控硅芯片,投切过 程采用零电位技术。电容投 切实现过零检测,零电压投、零电压切,投切过 程中无浪涌电流,无电压冲击,不产生高次谐波,工作安全可靠,使用寿命长,保证系统安全供电。 

三相不对称补偿功能 

用户用 电负荷不平衡时,根据每 相实际需要而定量投入,达到最佳补偿效果。 

滤波回路 

RC吸收回 路滤除高次谐波,实现无投切振荡,无补偿呆区。 

控制器全自动检测、运行 

控制器 具有检测自动跟踪、过电压封锁、缺相保护、欠压保 护及输出端短路等线路故障保护功能,当系统 电压过高或过低时,控制器 器自动退出运行。控制器 无故障运行时间不低于12年。 

数据通讯 

具有RS232/RS485物理通讯接口,通讯方 式可采用现场采集(点对点)或远程采(网 络)。 

温控保护 

当装置温度超过40℃时,散热装置自动启动,实行强制通风。


High Precision Compensation

The system power factor after compensation shall be better than 0.98 ~ 0.99 (or the designing value)

Rapid Response

For 50Hz power grid, the system response time is less than 4 ms.  The process of completing a switching is not more than 20 ms.  The switching frequency shall realize dynamic compensation according to the load variation of the users (up to 50 times/sec).

Switching Free from “Pollution”

The SCR group adopts imported chips. The process of switching adopts the zero potential technology. The capacitor switching realizes zero-crossing detection, zero voltage switching. During the switching, there are no surge current, no voltage shocks, no high-order harmonics. It is reliable in operation and has long service life. The safe power supply of the system can be guaranteed.

Asymmetric Three-Phase Compensation

In case of the imbalance of the electrical load, the user can input quantitatively to achieve the best compensation effect.

Filter Circuit

The RC absorption circuit filters the high-order harmonics to realize switching free from oscillation and compensation dead zones.

Controller Automatic Detection and Operation

The controller has the functions of detection, auto-tracking, overvoltage blocking, default phase protection, under voltage protection and short circuit fault protection etc. When the system voltage is too high or too low, the controller can stop operation automatically. The trouble free operation time shall be not less than 12 years.

Data Communication

It has RS232/RS485 physical communication interface. The means of communication can adopt on the spot data collection  (point to point) or the remote data collection (network).

Temperature Control Protection

When the device temperature exceeds 40 ℃, the cooling device starts automatically to realize mandatory ventilation.


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