High Voltage Dynamic ReactivePower CompensationDevice (SVG)

High Voltage Dynamic ReactivePower CompensationDevice (SVG)

Overview

The high-voltage dynamic reactive power compensation device (SVG) is a reactive power compensation system based on IGBTechnology. It can quickly and continuously provide capacitive or inductive reactive power, achieving appropriate votage and reactivepower control, ensuring the stable, efficient,and high-quality operation of the power system. In the distribution network, the high-volt-age dynamic reactive power compensation device (SVG) can significanty improve the power quality of the line and enhance the stabili-tyof power transmission. The compensation system increases reactive power, improves power factor,suppresses three-phase imbal-ance, mitigates voltage flicker and voltage fuctuations, maintains the voltage atthe receiving end, and strengthens the voltage stabilityof the system.

Featured

Modular Circuit StructureThe core of the SVG is a chain inverter based on IGBT devices. Each phase of the chaininverter consists of multiple power modules connected in series, with the powermodules adopting an N+1 or N+2 redundancy operation structure. The modulecontrol uses large-scale FPGA chips, and the intelligent design simplifies the circuit,improves interference resistance, and enhances reliability. The device usesself-excitation startup technology, ensuring low inrush current when the device is putinto operation.
The control system is highly integrated and reliable.The control mode can be set on-site: system compensation or load compensation,and the harmonic count for load compensation. A fast instantaneous reactiveuea conitel strarey adoted nabi ceninueus stale erantie urin tenr shotcrianty improves reliablity.
The local monitoring function is accomplished by both DSP and PLC,with a touch-screen Chinese display interface This is more reliable than the hardware of an embedded industrial control computerinterface and is more suitable for the electromagnetic environmentin industrial sites. The display panel shows functions such as DC voltage of the power module,fauly/bypass status of the power module,butput current, load current,fault display, and fault recall. It can also display the output current waveform Communication Interface: Ethernet, RS485, and CAN communication interfaces are used Through networking devices, the system’s operational data,status values, and alarm information are sentto the back-end server tor real-time monitoring of the field. This helps confirm the satety and operational status, improving the system’s reliability and maintainability.
Multiple functional parameter settings are available, making it easy to configure operational parameters for different load types on-site All parameter items are displayed in Chinese.
The control power supply can be configured with multiple modules in parallel and equipped wth DC UPS backup. When the AC control power supply fails, the control power is provided by the DC UPS backup, ensuring that the device operation is unaffected.
The power modules and the main control system use fiber-optic connections, providing high communication speed and strong anti-interference ability, ensuring good safety.