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Static Var Generator (SVG)SVG Wallmount & SVG Cabinet Mount
www.ges-group.com
Power Quality
INT
RO
DU
CT
ION
Introduction to Power Factor
Power factor is a measure of how effectively your electrical equipment converts electrical current into useful output power, such as heat, light or mechanical motion.
Active Power (P): Is the power used by a device to produce useful work. It is expressed in Watt (W) or KiloWatt (kW).
Reactive Power (Q): Is the power that does not produce work but is needed in an alternating-current transmission system to support the transfer of active power over the network by temporarily storing energy in inductive and capacitive elements. It is expressed in Var or Kilovar (kVAr).
Apparent Power (S): Is the power resulting by the vector sum of both the active and reactive power. It is expressed in Volt Amperes (VA) or KiloVolt Amperes (kVA).
Displacement Power Factor (cos φ): Is the cosine of angle between active and apparent power. When the DPF reaches unity, it means that all the fundamental current that flows through the electrical equipment produces work. This factor does not consider harmonic currents.
S (kVA)=√P(kW)2+Q(kVAr)2
02 G.E.S GROUP - STATIC VAR GENERATOR (SVG)
COS φ =P(kW)
Q(kVAr) S (kVA)
P(kW)
Q(k
VA
r)Benefits of addressing low Power Factor
Enables your business to lower its ongoing kVA demand charges and/or reactive charges, saving your business money.
Increased capacity available to serve actual working power requirements
Higher and better quality voltage regulation
Lower transmission and distribution losses in your electrical system
Reduces the threat of operational downtime caused by the overloading of your electrical assets.
Low power factor can lead to lower than ‘normal’ voltages within a site and consequently present unreliable equipment performance.
Many electricity network companies charge commercial and industrial customers when power factor falls below 0.95
Low power factor can lead to stressing of the internal electricity infrastructure. This may cause unnecessary overheating and equipment degeneration.
Ignoring power factor issues can increase costs for new installations, because of the need to oversize cables, switchboards and other electrical equipment.
Implications of low Power Factor
INT
RO
DU
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ION
A Revolutionary New Power Factor Control System
G.E.S GROUP - STATIC VAR GENERATOR (SVG) 03
Static Var Generator (SVG)Automatic power factor correction equipment is broadly applied in industry to ensure the electrical network is utilised to its best capacity. The usual form of such power factor correction is an automatic controller that monitors one incoming phase to a plant and switches banks of capacitors to try and maintain a target power factor.
The problems with capacitor based automatic power factor correction are vast and varied. It is slow to react to load changes so the system is constantly in a state of over compensation or under compensation. In today’s harmonic rich environments the capacitors suffer (even with harmonic blocking chokes), system resonance is a risk and the life expectancy of the system is
reduced. Contactors regularly fail and overloaded capacitors leak and present a real fire risk.
Sinexcel’s SVG is an entirely new approach to power factor correction. The SVG utilises a high speed three level inverter that reacts to changes in reactive power, injecting corrective reactive power into the system. Full correction is made in ¾ of a cycle. This rapid response provides stable accurate real-time power factor correction without the draw backs of traditional capacitor based systems. SVG can continuously adjust reactive power dynamically and bi-directionally (-1 to +1). There is little chance of system resonance and even under low voltage conditions SVG will provide full reactive power compensation.
Traditional two-level inverter circuit Innovative three -level inverter circuit
SVG Operating PrincipalSinexcel SVG checks the load current through the external CT, and performs computing through the external DSP to analyse the reactive content of the load current.
After that, it controls the PWM signal generator based on the settings to send control signals to the internal IGBT. In this way, it generates reactive compensation current to implement dynamic reactive power compensation.
Cos > 0.99
PR
OS
& C
ON
S
The Pros and Cons
New SVG
04 G.E.S GROUP - STATIC VAR GENERATOR (SVG)
Capacitor based systems are based on“staging in” and “staging out” banks offixed capacitance. This means the amount of correction is available only in multiples of the fixed banks resulting in over and under compensation.
The SVG uses inverter technology to inject an infinitely variable amount of corrective reactive power. This ensures the power factor is always at setpoint with no over or under correction.
The complete response time of the SVG is less than 15mS and the dynamic response time is less than 50uS. This makes the SVG perfect for sites with rapidly changing power factor.
The SVG uses inverter technology so resonance is eliminated.
The SVG can correct both an inductive (lagging) or capacitive (leading) load.
The inverter technology used in the SVG is very compact and typically requires less mounting area than a conventional system.
The SVG performance is virtually unaffected by low grid voltage levels.
The SVG has low losses and needs little maintenance. The service life is expected to be greater than 10 years.
Capacitor based systems are slow to respond. The power factor controllermust be tuned to stop cycling of the“staging in” and “staging out” process.The delay is further increased by the time taken for the bank contactor to pull in.
Capacitor based systems can encounterresonance.
Conventional systems can only correct an inductive (lagging) load.
Conventional systems are manufacturedby collectively installing blocking chokes,capacitors, and switching contactorsinto an enclosure. This takes up a largeamount of switchroom real estate.
The performance of power factorcorrection capacitors is greatly impactedby the grid voltage level. Low voltage onthe grid results in poorer compensationperformance from the capacitors.
Capacitor based systems require frequent switching of the stages to achieve correction for changing power factor thus resulting in a shortened service life, in some cases as low as 3 years.
ConventionalCapacitor System V
PR
OS
& C
ON
S
SVG Performance
G.E.S GROUP - STATIC VAR GENERATOR (SVG) 05
Quick Response
The system reactive power compensation can be completed immediately, right at the startup of the Sinexcel SVG.
Real-Time Tracking
Sinexcel SVG can make dynamic and real-time compensation based on the changes of system reactive current.
Ideal Compensation
Sinexcel SVG releases compensation current that has the same capacity - but an opposite phase, as system reactive current.
Reverse Overlapping
After the compensation current is reversed in its direction, the system reactive current overlaps with the reactive current released
by Sinexcel SVG.
FE
AT
UR
ES
SVG Features
Structural Dimensions
06 G.E.S GROUP - STATIC VAR GENERATOR (SVG)
Compact Modular Design for Ultimate Flexibility
Combinations for any Industrial Condition
MODELDIMENSIONS
(W X H X D) (MM)WEIGHT
(KG)
sinexcel 030/050
SVG 44L/RL
500*192*590 35
sinexcel 100 SVG
44L/RL
500*270*550 48
MODELDIMENSIONS
(W X H X D) (MM)WEIGHT
(KG)
sinexcel 050 SVG
44L/HL
500*585*197.1 35
Outstanding Reactive Power Compensation
Stable and Quick Reactive Power Compensation
3 level topology
Stepless Reactive power compensation: COSφ>0.99
Three-phase unbalance compensation
Capacitive and inductive compensation: -1 to + 1
Mix and match modules for optimum sizing
Each module has all functions and can operate independently
Wallmount and rackmount options
Customizable cabinet designs
Standardized design for high quality and reliability
Easy to commission, use, transport, and maintain
SVG for reactive power compensation
ASVG for reactive power compensation and limited harmonic compensation
SVG+AHF reactive power compensation and harmonic compensation
Real-time compensation, with the overall response time less than 15 ms. Dynamic reaction time is less than 50µs.
Free of over-compensation, under-compensation, and harmonic resonance. The compensation capacity is equal to the installed capacity and is not affected by voltage drop.
Long Service LifeThe designed service life is 100,000 hours, without any maintenance.
SP
EC
IFIC
AT
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S
Technical Specifications
G.E.S GROUP - STATIC VAR GENERATOR (SVG) 07
ITEM400V
Sinexcel SVG 030 Sinexcel SVG 050 Sinexcel SVG 100
System Parameters
Rated input line voltage 400V
Input phase voltage range -40%~+20%
Power grid frequency 50Hz/60Hz (range: 45Hz ~ 63Hz)
Parallel operation Unlimited
Overall efficiency >97%
Power grid structure 3P3L/3P4L
CT 150/5 ~ 10,000/5
Power grid structure 3P3L/3P4L
Performance Indicators
Single-module compensation capacity 30/50kvar 100kvar
Response time <15ms
Target power factor Adjustable from -1 to +1
Cooling mode Smart air cooling: 220L/secSmart air cooling:
405L/sec
Noise level per module <65dB
Communications and Monitoring Capabilities
Communications ports RS485, CAN, and network port
Communications protocols Modbus and PMBus
Alarm Available
Monitoring Monitoring module, and optional centralized monitoring modules
Mechanical Properties
Mounting type Rack-mounted, wall-mounted, and cabinet Cabinet
Cable entry modeRear entry for rack-mounted type; top entry for wall-mounted type; top or bottom
entry for cabinet
Dimensions (W x D x H) (mm3)500*590*192 (Rack-mounted)
500*585*197.1 (wall-mounted type)510×270×500 (cabinet)
Module net weight 35kg 48kg
ColorTrue color of plate coated with aluminum-zinc alloy,
and black for wall-mounted type (customizable)
Environment Requirement
Altitude1500 m. Between 1500 m to 4000 m, according to GB/T3859.2,
the power decreases by 1% for every additional 100 m.
Operating temperature -10 ~ 40 ºC
Relative humidity 5% ~ 95%, non-condensing
Protection class IP20 (other IP classes are customizable.)
GES Group is the UK representative and distributor for the innovative Active Harmonic
Filters and Static VAR Generators from the international market leader, Sinexcel.
Sinexcel are one of the world’s largest suppliers of Active Harmonic Filters and Static
VAR Generators, and lead the field in performance and design.
With a R&D Centre of more than 100 people, and a 14,500m2 manufacturing centre,
Sinexcel is a high-tech enterprise, specialising in intelligent power quality and control
technologies, and concentrating on delivery of high quality products. With a focus on
excellent customer support and service, Sinexcel is a great fit with GES Group.
Head OfficeGrants Electrical Services
Pennybridge Industrial EstateBallymenaBT42 3HB
Tel: 02825 656406Email: [email protected]
GES AutomationTrade Counter
Pennybridge Industrial EstateBallymenaBT42 3HB
Tel: 02825 656406E: [email protected]
Grants Electrical Services, Mallusk Hyde Park Industrial Estate
McKinney RoadMallusk
BT36 4PXTel: 02890 835567
GES Automation, MalluskTrade Counter and Electric Panel Building
Hyde Park Industrial EstateMcKinney Road
MalluskBT36 4PX
Tel: 02890 835567E: [email protected]
www.ges-group.com