© p2power solutions pvt. ltd p2 power solutions neutral compensation - hospitality

© P2Power Solutions Pvt. Ltd

P2 Power Solutions Neutral Compensation - Hospitality


An Innovative Engineering Solutions company focused on ensuring high Power Quality for it’s customers

Promoted by a group of IIT Kharagpur graduates

State of the art production facilities at Noida & Kharagpur

An ISO 9001:2008 certified company

Currently delivering products (CE certified) and services catering to the power and energy demands of the industry

Dedicated R&D activities in collaboration with IIT Kharagpur to improve and expand the current range of products and services

Company Profile


Measurement errors in metering equipments

Spurious operation of fuses, circuit-breakers and other protective devices

Voltage glitches in computers systems resulting in lost data

Electromagnetic interference with TV, radio, communication & telephone

Malfunctioning of standby generators and associated AVR control equipments

Excessive temperature rise in motors, transformers

Failure of Power Factor correction equipments

Malfunctioning of precision equipments

Low Power Quality - Symptoms


Case Study – Client Details

Client - 5 star Hotel

Sector - Hospitality

Peak Load - 950A

Neutral Current - 230A

iTHD - 14%

Triplen Harmonics - 8%

PF (uncompensated) - 0.91

Point of Correction - Utility Panel, Lighting loads


Case Study – Client Details

The client had 4 utility panels for lighting loads. The peak load in each panel ~180A Neutral current in these panels ~120A

To reduce the problem of heavy neutral currents, we recommendedthe installation of P2 Power Active filter (4 wire configuration) at eachutility panel.

The results have been summarized in the following slides.


Case Study – Client SLD

Transformer

Utility Panel #1

P2 Power Active Filter (100A, 4wire)

Utility Panel #2


Utility Panel #3


Utility Panel #4



Unit Off

Utility Panel – Lighting Loads

Unit On

Neutral Current ~

63%

100A Neutral Compensation

Unit


Line Current - Harmonics

~ 33% ~ 20% iTHD~ 33%

~ 26% Triplen~ 9.5% ~ 26% ~ 9%

~ 21%

Triplen Harmonics

add up in the Neutral

Filter : OFFFilter : ON Filter : ON


Neutral Current

neutral current~ 42A ~ 115A ~ 43A

Filter : OFFFilter : ON Filter : ON


Neutral Compensation - Filter Output

L1 ~ 25A

L2 ~ 25A

L3 ~ 27A

Ln ~ 78A

Filter : ON Filter : OFF


Active Filter – Working Principle

LOAD

4 wire – Active Filter

CT1 CT2 CT3 L1 L2 L3

Supply

L1L2L3

LN



LOAD

4 wire – Active Filter

CT1 CT2 CT3 L1 L2 L3

Supply

L1L2L3

LN

The P2 Power Active filter in 4 wire configuration senses the 3 line currents and calculates the neutral current using Kirchoff’s Current Law.

Once the required neutral current has been calculated, the digital signal processor uses advanced closed loop control logic to compensate the same. This way the heavy neutral current does not reach the main tranformer.

The 4 wire configuration can integrate harmonic compensation, stepless power factorcorrection and active load balancing along with neutral compensation.


Iacti

ve

Ireacti

ve

Iharmo

nic

IL

oa

d

Ireact

ive

Iharmo

nic

Ineutra

lIAF



Igrid IAF ILoad

AF

LoadIgrid

active

reactive +harmonic + neutral



Active Filter - Advantage

Ultra Fast Response

No Risk of Over

Compensation

No Risk of Resonance

Step-less Correction

Small Footprint

Programmable


Optimum capacity

utilization

Reduction in Peak current

demand

Reduced losses

Reduced heating

Efficient loading

Active Filter – Benefits


COMPARISON SHEET

Active Power Conditioner Hybrid PF Compensator Substitute Technology

P2 Power Active Filter P2 Power Hybrid Compensator APFC, RTPFC

PERFORMANCESpeed < 0.2 milli seconds < 0.2 milli seconds Response time in seconds

Technology Stepless current compensation Stepless current compensation Stepped kVAR compensation

Effectiveness Effective with highly fluctuating loads Effective with highly fluctuating loads Ineffective with fluctuating loads

Power Factor (PF) Correction True PF compensation Displacement PF compensation Displacement PF compensation

Leading/Lagging PF Both Leading/Lagging PF compensationBoth Leading/Lagging PF

compensationLagging PF compensation only

Load Balancing Negative sequence current injection Negative sequence current injection No load balancing

Harmonic Compensation Harmonic compensation No Harmonic Compensation No Harmonic Compensation

Neutral Correction Possible with 4 wire system Not possible Not Possible

FOOTPRINT

Size Advantages Smallest Footprint Small Largest Footprint

COSTInstallation (per Ampere) `3400~`4200 `2300~`2800 `1000~`1800

Resource Intensive Smallest space requirement Low on space requirements Increases cost of space

Capital Cost Reduced failures Reduced failures Can increase failures due to resonance

Operating Cost Low operating cost Low operating cost Recurring cost of capacitor replacement

Returns on Investment High High High with non fluctuating loads

Improved PF Improved PF Ineffective with fluctuating loads

Better voltage profile Better voltage profile Introduces voltage transients

Reduced failures Reduced failures Can increase failure due to resonanceMAINTENANCE

Maintenance requirements Modular design Modular design Easy Maintenance

Spare parts requirements Virtually maintenance free Virtually maintenance free Recurring cost of capacitors/contactors


Thanks!

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