SVG STATCOM Line

6 / 10 / 27.5 / 35 / 55 kV · to 200 Mvar tested

Cascaded medium-voltage static var generator connecting directly at distribution voltage. Response to 5 ms, 20-year design life, MTBF above 75,000 hours, with reactive, harmonic and negative sequence compensation modes. Every power unit is full-load tested before shipment.

Response time up to 5 ms
Rated voltages 6 kV, 10 kV, 27.5 kV, 35 kV and 55 kV, 1-ph or 3-ph, 50 Hz
Designed service time 20 years; MTBF > 75000 hours; MTTR < 5 minutes
Reactive power, harmonic current and negative sequence compensation, or comprehensive compensation
100% power unit full load and high temperature aging test; complete set full load test up to 200 Mvar
Air cooling or water cooling; fibre optic HV isolation

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Overview

The SVG Statcom Line is a chain structured static var generator (static synchronous compensator) that acts as a variable reactive power supply to compensate for variation of reactive power in the load. Each power unit has an identical structure and performance, which the brochure credits for the reliability, flexibility and availability of the system.

Main functions include improving power transmission stability, maintaining the receiving-end voltage level, compensating reactive power and improving power factor, harmonic compensation, reducing voltage fluctuation and flicker, and reducing 3-ph unbalance.

SVG Statcoms are applied in power transmission, electric railways, metallurgical, oil and gas, and wind power industries. Every power unit is full load tested and aged at high temperature, and complete sets are full load tested up to 200 Mvar.

Specifications

Electrical

Rated voltage: 1-ph / 3-ph, 50 Hz; 6 kV / 10 kV / 27.5 kV / 35 kV / 55 kV
Power factor: > 0.95
Harmonics: In accordance with related IEEE Standard
Power semiconductor: IGBT
Structure: Chain structured; modularised design facilitates ease of transportation and site installation
HV isolation: Fibre optic communication
Power supply for control: 380 VAC or 220 VDC

Performance

Response time: Up to 5 ms
Designed service time: 20 years
MTBF: > 75000 hours
MTTR: < 5 minutes
Compensation functions: Reactive power compensation, harmonic current compensation, negative sequence compensation and comprehensive compensation

Capacity by voltage (product selection)

6 kV, direct connection: < 7.8 Mvar (star); < 13.5 Mvar (delta); air or water cooling
10 kV, direct connection: < 13 Mvar (star); < 22.5 Mvar (delta); air or water cooling
27.5 kV, direct connection: 3.5 ~ 18 Mvar (27.5 kV single phase); < 55 Mvar (27.5 kV delta); air or water cooling
27.5 kV, step down: < 3.5 Mvar (6 kV single phase); air or water cooling
35 kV, direct connection: 7 ~ 45 Mvar (star); < 29.5 Mvar (delta); air or water cooling

Control & protection

Control mode: Instantaneous current test; PWM current tracing; DC current close loop control; voltage balancing technology on DC side
Control chip: Advanced DSP; site programmable array
Protocol: Modbus
Protections: Over-current, short-circuit, grounding, over / under-voltage, open phase, over-temperature, control power supply fault and communication fault
Display: Network current / volt, load current, compensation current, active and reactive power and PF