Static Var Generator SVG10/20/30KVAR

Product Description

Static Var Generator (SVG) is a product aimed for Power Factor Correction, Voltage Regulation along with Three-phase Balancing Function. SHHKK-SVG can do bi-directional power factor correction, PF from 1.0 inductive to 1.0 capacitive. Benefiting from inverter technology, SVG compensation is stepless, which means SVG output shall match the system reactive power, no over-compensation or under compensation. For single module, SVG capacity ranges from 35kvar to 120kvar. For cabinet system, it's unlimited parallel design .
Compared with the traditional capacitor bank, SVG has the advantages of fast response and high compensation accuracy without under-compensation or over-compensation problems.

Product model and meaning

Technical parameters

Standard type	400V				400V	480V	690V
	35kyar	50kvar	75kya	100kyar	150kyar	90kyar	120kvar
System parameters
R.atedinput wire vdltage	380V(-15%~+20%)				380V(20%~+20%)	480V(-20%～+20%)	690V(-30%～+15%)
Grid frequency	50/60Hz(range:45Hz~63Hz)
Number of parallel machines	1～10sets
Overallefficiency	≥97%				≥98%
Grid structure	Three-phase three-wire/three-phase four-wire				Three-phase three-wire
Current transformer	150/5～10000/5
Circuit topology	Tri-level
Performance index
Single module compensation capac ity	35kvar	50kvar	75kvar	100kvar	150kvar	90kvar	120kyar
Response time	<15ms				<20ms
Scope of compensation	From-1 to 1.capacitive and inductive continuity is adjustable
Cooling mode	Intelligent air cooling
Noise index	<56dB				<65dB
Communication monitoring ability
Communication interface	Rs485,internet access
Communication protocol	Modbus Protocol,General Electric Protocol,TCP/IP
Fault alarm	Yes,up to 256 alarm records
Monitoring mode	Support centralized monitoring and independent monitoring
Mechanical characteristic
Fived mode	Rack type,wall-mounted type				Rack type
Incoming line mode	Rack-type back-incoming line wall-mounted up-incoming line				Back-incoming line
Appearance color	National Standard 7035-Light Grey(Customizable)
	National Standard 7035-Light Grey (Customizable)
Altitude	(1500m, used in accordance with rated capacity; 1500-5000m, used according to GB/T 3859.2 reducing rated capacity by 1% for each increase of 100m,
Operating temperature	-25～40'℃
Relative humidity	5%~95%,no condensation
Grade of protection	IP20

Working prin ciple

HKK-SVG static var generator is a bridge converter composed of fully controlled power ele ctronic devices for dynamic reactive compensation, The basic principle is that the load current is detected in rea time by the externa current transtormer 1CT). and the reactive content of load current is extracted bythe internalDSP computing. Finally, the instruction value is calculated to control the PWM signal generator to send the control signal to the internal lGBT, so that the inverter can produce the reactive compensation currentto meetthe requrement, and finally real ize the dvnamic reactive compensation

1. HKK-SVG compensates capacitive var (vector graph)

2.HKK-SVG compensation for inductive var (vector graph）

3. HKK-SVG schematic diagram

4. The compensation effect before and after the use of Hkk-SVG is shown in the picture
a. Voltage and current before the analog device is put into operation

b. Reactive current emitted by the analog device

C. The compensation effect after the analog device is put into operation

The essential improvement of the var compensation effect of HKK-SVG

Traditional compensation device	HKK-SVG static var generator
HKK-SVG is a component device and can be assembled freely,but TSC compensation device switching capacitor group is grouped switching the reactive power outputcapacity is stepped compensation capacity which can not be adjusted continuously,it is difficult to achieve balance completely with the reactive power of the system,which iseasy to cause over complement or under-compensation,the compensated power factor is generally around 0.8-0.9.	HKK-SVG adopts the design concept of component-based products,which can compensate the capacitive and inductive loads,achieving the level 0.99 compensation effect,and avoiding the situation of overcompensating and under-compensating
It takes up to 20 milliseconds for a traditional compensation device to complete the compensation	The complete response time of HKK-SVG is less than 15 milliseconds,and the dynamic response time is less than 50 microseconds,especially suitable for fast changing situations.
The traditional compensation device uses SCR-regulated reactance plus multi-group LC as the main means of var compensation,which is easy to produce resonance amplification and leads to safety accident.	HKK-SVG capacitors do not need to set up filter banks,there is no resonance amplification;and HKK-SVG is an active compensation device,is a current active device composed of a detachable device IGBT,the resonance phenomenon is avoided in mechanism and the safety is greatly improved.
The traditional compensation device uses capacitor to provide var power,which can only compensate the inductive load, and loses the compensation effect when the system is capacitive or in the state of capacitive and inductive repeated changes.	HKK-SVG can adjust var power dynamically,bidirectionally (-1～1)continuously,that is,it can output var continuously from rated inductive condition to rated capacitive condition and it,combined with fixed capacitor,can form any range of continuous compensation.
Traditional compensation devices usually require high-capacity capacitors and reactors as energy storage components,so they occupy a large area of space.	HKK-SVG does not need large capacity capacitors and reactors to do energy storage components,the area is usually only 50% of the same capacity of other types of dynamic compensation, or even smaller,while HKK-SVG uses modular design and cabinet installation,workload of engineering design and installation is small.
Traditional compensation devices rely on capacitors to provide capacitive var.Because the output reactive current is proportional to the grid voltage,if the grid voltage is low the output reactive current is also low,resulting in a decrease in the compensation capacity,it is difficult for them to provide adequate compensation	HKK-SVG adopts active compensation circuit,the compensation capacity is little affected by the system voltage and can output reactive current similar to the rated condition when the system voltage is low.
The traditional compensation device has frequent compensation switching,short service life,usually in three years or so,and needs to be maintained frequently.	HKK-SVG has minimal loss and doesn't need maintenance basically,and there is no resonance overvoltage problem the design life is more than ten years with normal use and trouble-free.
To achieve better compensation effect,the traditional compensation device usually requires the installation capacity to be greater than the compensation capacity	The compensation capacity is installation capacity,when reaching the same compensation effect,the capacity can be 20%-30%smaller than the capacity of the traditional compensation device.

keyword：

Static Var Generator /SVG

Reactive Power Compensation

Improve Power Factor

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