Poor Power Quality

Harmonics Reactive power

3 phase imbalance

Low Power Factor

Low power factor, fined by government.

Reduce distribution system effective capacity, need to increase system capacity.

Increase power cost, low efficiency, increase power loss and equipment get hot.

Generate voltage drop caused by reactive current, equipment is derated.

Reactive Power Harm

Apparent Power S=141kVA

Active power P=100kW

Reactive power

Q=100kvar

1

Power Factor Cos 1=100/141=70%

Apparent Power S=105kVA

Active power P=100kW

Reactive power

Q=32kvar2

Power Factor Cos 2=100/105=95%

141-105105

= 0.35 When active power is same 100kW,Power grid needs to supply 35% morecurrent for power factor 0.7 than 0.95

Industry Power factor before compensation %

Chemical industry 65-75

Coal mine industry 65-80

Electroplating industry 65-70

Foundry industry 75-80

Forging industry 70-80

Medical industry 75-80

Machinery production 60-65

Commercial building 80-90

Oil drilling 40-60

Papermaking industry 55-65

Steelworks 65-80

Plastics industry 75-80

Textile industry 65-75

Industry Typical Power Factor

SVG Static Var Generator

PF COS=1.00

Reactive Power Compensation

Benefit after reactive power compensation

Avoid low power factor fine

Reduce power cost, increase efficiency

Reduce power consumption by reactive power

Release system capacity occupied by reactive

Breaker

Transformer

Grid

Reactive power compensationLoad bus

P Q

S

P Q Reactive power compensation: the reactive power is supplied by reactive power compensation equipment to replace supplied by power grid or transformer

S

SVG Working Principle

SVG working principle

SVG capacitive mode

PF0.99 compensation effect through SVG

Power grid

Inductive load

U

j

+ Uj

U

j

U

j

voltage

currentU

j

Power environment with inductive reactive power

SVG

compensated current

SVGSVC

More stable running

Longer lifespan

Faster response

Wider running range

More stable capacity

More smooth adjustment

Lower harmonics

More stable system voltage

More sufficient capacity

SVG advantages

Advantages of SVG

Resonance

Compensation capa.< installation capa.

Big Small

Compensation capa=installation capa.

Resonance

Traditional capacitor could not respond load change timely, over compensation or under compensation happen.

Over compensated

Under compensated

SVG fast response time

Selling Points

NO. 2 Power factor up to 1

If the compensation current direction is reversed, it is same as reactive power current.

Traditional capacitor is

step compensation,

could not realize

accurate compensation.

Normally used for

condition with stable

reactive power change,

low dynamic

adaptability.

SVG generate equal value, opposite direction compensation current with reactive power current.

SVG could monitor reactive power change of load, and generate

equal value, opposite direction compensation current, realize PF0.99

accurate compensation effect.

SVG could compensate inductive and capacitive reactive power.

SVG

SVC

Selling Points

NO. 3 Modular structure

Installation is fixed, difficult

to install or change onsite.

Difficult to expand on old

cabinet.

Module type 50kvar/100kvar, rack

or wall mounted type, easy to install.

Free parallel, easy to increase

compensation capacity.

Free parallel connection to get flexible capacity

N+1 redundancy, high reliability Module independent running, no

effect to other modules in case of problem.

Production line manufacturing ensures good quality

Inductive, capacitive reactive power compensation adjustable

Compact, light weight Easy to maintain Easy to install Easy to move

SVG

SVC

Selling Points

NO. 4 High Stability

Compensation capacity stable

SVG is active compensation facility, not be affected by system voltage fall, keep stable output capacity. Compensation capacity is installation capacity.

System voltage stable

SVG is active compensation facility, without over compensation or under compensation, ensure system voltage constant.

Compensation effect safe and stable

SVG is active compensation facility, avoid resonance from working principle, ensure safe and stable.

400V SVG 480V SVG 690V SVG

Picture

Typical type 50/100kvar 65/130/195/260kvar 90/180/270/360kvar

Rated input AC line

voltage400V 480V 690V

Input voltage range -40% ~ +20% -20% ~ +20% -30% ~ +15%

Electric network 3 ph 3 line, 3 phase 4 line 3 ph 3 line 3 ph 3 line

Module capacity 50kvar, 100kvar 65kvar 90kvar

Efficiency >97%

Parallel connection

quantityNo limit

Fast response time 15ms 20ms

Target power factor -1 to 1 adjustable

Cooling method Intelligent forced air cooling

Noise/module