Hybrid Charger System for

Energy Storage

&

Return to Grid

Mr. Shlomo Ostrovski

VP Marketing & Sales

Advice Electronics

Energy storage

• Energy storage will soon become an essential element

of the smart grid

• Especially as more power generation from inherently

intermittent sources such as solar and wind come online.

• In some markets, there may also be value for companies

to buy and store power when it is least expensive, and

use the stored power during peak demand when prices

are highest (arbitrage).

• Electric energy storage systems are crucial for the

further development the sectors, including:

o Renewable energy,

o Automotive,

o Grid stabilization,

o Smart grid,

o Back-up power.

• The two main applications of energy storage

technologies are:

o Power-driven by the needs for power quality

o Bridging power-and for energy management.

• The most important drivers for developing electric energy

storage systems are grid stability and reliability

• “Electric energy storage technologies will be an

inseparable part of smart grids and distributed energy

generating systems in the future.”

• Reliable and durable electric energy storage technologies

will enhance the usage and commercial attractiveness of

energy sources, such as wind and solar power.

• Among the various electric energy storage systems,

advanced batteries are set to attract the greatest interest

in the near future.

• This is because of their flexibility in use, in grid balancing

and connecting intermittent renewable energy

generators to the main electric grid.

• Frost & Sullivan research reveals that lithium-ion

batteries will play the most important role in the future of

electric energy storage systems.

• Fuel cells, could also be used for energy storage.

• Before electric energy storage technology can be

adopted on a mass scale, certain technical problems

need to be resolved.

• For instance: o Focused on developing new chemistry that will optimize battery

durability and energy density.

o Reduce the time needed for battery recharging

• find solution is likely to encourage widespread adoption

of battery technology by the automotive and electric grid

industries.

Solar is not available when you want it, but it's

available when you need it.

• The need for energy storage will also be driven by

nature of many renewable energy sources, such as solar

power and wind.

• Solar is generating in a very high correlation when the

grid is needing power.

• Reality is when the demand is the highest.

• A typical application is load leveling, which involves

charging storage when energy cost is low and using

the stored energy as needed..

Hybrid chargers solution for storage

Energy storage

Power core

Energy source

Hybrid solution

Energy flow Control/monitor

Energy to Grid

HYBRID FUNDAMENTALS

Sunny day

Hybrid Fundamentals

Sunny day

Hybrid solution Fundamentals

During night

Hybrid solution Fundamentals

During night

Remaining Capacity

0200400600800

10001200140016001800200022002400260028003000

8/1/2009

0:00

8/2/2009

0:00

8/3/2009

0:00

8/4/2009

0:00

8/5/2009

0:00

8/6/2009

0:00

8/7/2009

0:00

8/8/2009

0:00

8/9/2009

0:00

8/10/2009

0:00

8/11/2009

0:00

8/12/2009

0:00

8/13/2009

0:00

8/14/2009

0:00

8/15/2009

0:00

8/16/2009

0:00

8/17/2009

0:00

8/18/2009

0:00

8/19/2009

0:00

8/20/2009

0:00

8/21/2009

0:00

8/22/2009

0:00

8/23/2009

0:00

8/24/2009

0:00

8/25/2009

0:00

8/26/2009

0:00

8/27/2009

0:00

8/28/2009

0:00

8/29/2009

0:00

8/30/2009

0:00

8/31/2009

0:00

9/1/2009

0:00

RemCap

Genset start

Genset stop

Hybrid solution Fundamentals

It takes >5 days before Generator starts after discharge from 90% to 50% capacity

Power Core– RECTIFIERS

• First company to introduce High Efficiency • Leading the industry with a certified efficiency of 96,4% (48V) • Complementary and fully compatible with our existing product portfolio

3000W each module

Power Core–SOLAR CHARGER

• Flatpack 2 HE Solar

• High efficient DC/DC converter, 96%

• Regulated output voltage

• Galvanic isolation

• improves immunity to lightning transients and faulty

conditions

• Maximum Power Point Tracking (MPPT)

• Modular design, flexible and upgradeable

• Maximize the output of your PV panels

• Output power: 1500 W

Power Core- WIND CONVERTER

• Flatpack 2 HE Wind – 1u solution

• Including 3phase MCB and emergency break switch

• High efficient DC/DC converter, 95%

• Regulated output voltage

• Galvanic isolation

• improves immunity to lightning transients and faulty conditions

• Maximize the output of your wind generator

Output power: 3000 W

Alternative Energy- BATTERIES

• With a cyclic operation batteries plays a new and active role in the

system.

• Larger capacity is needed to maintain security backup time as a

discharge is part of a normal operation mode.

• New battery technology is needed, technologies that allows hundreds

or even thousands of discharge cycles.

• Useful battery technologies are i.e.

– OPzV

– OPzS

– Deep cycling 2800 cycles

• Future battery technology

– Lithium

– sodium–sulfur battery

– VRB

– Flow Batteries like Fuel Cell (more than 10000 cycles)

Alternative Energy -On Grid Inverter

• Performance

• Reliability

• Easy to used

• Modula &Central inverter

• Monitoring and Communication

Alternative Energy – CONTROLLER

• SmartPack 2: Common interface for all energy sources

• Diesel generator control and monitoring

• Efficiency Algorithms

• Advanced monitoring (i.e. solar energy, fuel level)

• Advanced Battery Management

• Advanced Site Management

o Site optimization with respect to fuel usage

o The Multi Site Monitoring Tool is a software that monitors Eltek controllers within the customer network

o The controller is a major component to increase the end to end efficiency.

Hybrid Site (off Grid) Analysis

Site Name: Morobe Papua New Guinea

• 2 x 11KvA Generator

• 30% DOD

• 3000Ah Battery.

• Peak Load 1.2Kw

• 1500W Solar Panels

• Unmanned

Breakdown of Analysis

• Generator run time ~ 03Hrs

• Battery run time ~ 21Hrs

• Load 700W Average

• 1 Cycle per day

Installed Hybrid Site Analysis - Graphs

Diesel Savings: 680 liters per month = approx. $2050 per month ($3.00 per liter delivered to site)

OPEX Savings : 67%

-30

-5

20

45

70

95

120

145

170

195

220

245

ns1:Current Solar ns1:Current Battery ns1:Current Load

ns1:Current Rectifier ns1:Voltage Battery

Questions

Thanks'!