Power back up 1-14052012

UPS SOLUTION FOR HIGHEST
POWER PROTECTION
AVAILABILITY

28/02/2006 Newave SA, Switzerland – info@newave.ch - www.newaveups.com ML3-49 1

PART ONE


DISTRIBUTED PARALLEL ARCHITECTURE
DPA

“Mission critical applications”
require
high power availability

Critical Application

(n+1)- DPA . . .No Single Point of Failure. . .Highest Availability
28/02/2006 Newave SA – info@newave.ch - www.newaveups.com ML3-49 3

DPA

Why do we parallel UPS’s ?
 For Superior Reliability (Redundancy)
The answer to superior reliability requirements for business-
critical applications is true redundancy, where all parallel
modules equally share the load.
If one module fails the remaining modules will continue to
provide power protection.

 For Power Upgrade (Scalability)
To meet the power requirement demands of growing data-
centers and telecom
systems it is possible to easily reconfigure an existing
UPS-power system by simply adding one or more modules.

(n+1)- DPA . . . No Single Point of Failure . . . Highest Availabity

DPA

Evolution of Parallel Architecture

• Fictitious Parallel Architecture

- Hot-Stand-by (Cascade) Configuration
• Standard Parallel Architecture

- Parallel UPS
• Newave‘s Leading Concept

- Decentralized Parallel Architecture (DPA)


DPA

Fictitious Availability
Hot-Stand-by Configuration Cascade system
• Each UPS can support total load
• No-load condition for No 2
Mains Mains • Compromise solution - no parallel load
By-pass Line sharing
• The overload capability is limited by the
capacity of one single system = 150%
typical
• The system must execute 2 by-pass
operations under overload conditions in
series !
By-pass Line (1) Load

DPA

Standard Parallel Architecture

50% load
• Load sharing with two units
• Each UPS can support total
100% load
load (if redundant)
• Full overload capability of

50% load
2 units = 300% typical


DPA

Two different parallel topologies

+
=
Centralized Bypass Decentralized Bypass

OR


DPA

Parallel - UPS with Centralized Bypass

• Limited extension at high cost

• Low Reliability

• Extendible only with power interruption

• Unit splitting with high costs
Single point of failure
• Additional cabling and cabinet


DPA

Parallel - UPS with Decentralized Bypass

• High reliability

• Easy to extend (scalable)

• Low cost for power extensions

• Easy downgrading from parallel to

single version is possible


DPA

Parallel UPS + decentralized By-Pass offers:

• Redundant by-pass

• Scalability

• No single point of failure

What about control electronics?


DPA

Parallel-UPS with Centralized Logic: “Master-Slave”

• One defined UPS is leader

• Logic failure = System failure

• One critical UPS Element is not redundant



DPA

Parallel-UPS with Centralized Logic: “Common Box”

• Only One Element can decide for all units

• Logic failure = System failure
C.B
• One critical UPS Element is not redundant



DPA

Parallel systems offer increased reliability
They still have single failure points

It’s the intermediate step to reach
redundancy
NOT EVERY PARALLEL UPS IS A REDUNDANT SYSTEM!


DPA

“Redundant Parallel Systems”

“Redundancy” means:
The existence in the system of more than one possibility to
fulfil the demanded function - or - the system can afford at
least one single failure of any type

Redundancy degree is “n+x”:
n = number of units / elements to fulfil the demanded function
x = number of units / elements which can fail without influence
n+1 = one unit / element can fail and the demanded function is
maintained


DPA

Example:
if the demanded function is fly, redundancy means:

• 3 engines can fails and the demended function is mantained
REDUNDANCY N+3
• If one wing fails the demanded function is not maintained
NO REDUNDANCY



DPA

Redundancy in UPS means

Demanded function is supply the load

50% load

100 kVA
• Redundancy N+1

Critical load = 100kVA

50% load
100 kVA


REDUNDANCY IN UPS MEANS

Fault tolerance:
A fault-tolerant or failure-tolerant system is a system which
continues its operation even if one or more parts of the system fail

Error masking:
Capabilty to mask failures in order to avoid any influence on the
demanded function

Error detection:
A sensor / supervisory-element to detect single failures

Error isolation:
Capability to isolate faulty parts without disturbing the demanded
function


Fault Analysis - part identification:
Capability to analyse a failure and identify the faulty part

Error removal:
Replacement of faulty parts without disturbing the demanded
function

Return to normal mode:
Normal operation will be restored without interrupting the
demanded function



•Fault tolerance
•Error masking
•Error detection
•Error isolation

•Fault analysis
•Error removal
•Return to normal mode

All these operations must be carried out without
putting any strains on the load:

!! WITHOUT INTERRUPTION !!

NEWAVE’S LEADING CONCEPT

Mains UPS 1
1. Decentralized Parallel Static

Architecture (DPA) Bypass

2. Independent: Control

Logic Regulation
Logic
- Power Circuits (inverter,
rectifier, static bypass) Recifier Inverter

- Control Logic
Critical
- Regulation Logic load
UPS 2
3. No single point of failure Static
Bypass

4. Any UPS can be the logic
Control
leader (MultiMaster system) Logic Regulation
Logic
5. No limitation in number of
Parallel units Recifier Inverter

6. Perfect Load Sharing
Parallel Logic Bus Parallel Regulation Bus

DPA

Sequential softstart after utility recovery or gen-set start:
• no over-rating of gen-set
• no disturbance of other connected loads
• no cables overheating

Connection to Wavemon Management Software allows:
• single unit access
• single module access ( rectifier, inverter, battery)
• remote monitoring and operation


SECOND PART


Power back up 1-14052012

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