overcoming the challenges derived from the transition of...

Overcoming the challenges

derived from the transition of traditional

Power Plants to Energy Storage

Barbara Rossi - Business Development

Antonio Zingales – SalesManager

Introduction to SAET

Energy Storage as a new technology for grid needs:

SAET experiences in power & energy projects for

distribution & transmission grid

Future overview & conclusions

From traditional generators to renewables: SAET & the

evolution of Italian electric system

OVERVIEW

Lessons learnt: role & challenges of a system integrator

in Energy storage projects


SAET SpA, founded in 1956, is an engineering company

working as EPC in Energy projects

SAET spa

Via A. Moravia, 8

35030 Selvazzano D.

PADOVA ITALY

Located in Padova, North East Italian region

50 employees (over 20 engineers)

Turnover of 20-30M€


With technical expertise in:

Electrical Systems

( HV substations, MV-LV

switchboards, Protection &

control systems, Electric Scada)

Handling & Dosing Systems

( Bulk Material Handling, Belt

feeders, Belt scales, Dosing of raw

materials)

Automation

(PLC /DCS control systems with

SCADA supervision)

SAET acts as EPC

in different fields

Design &

Engineering

Service

Supply &

Commissioning

POWER PROCESS

TRANSMISSION

DISTRIBUTION

PRODUCTION

Italian electrical system before years 2000 was clearly divided into three

different subsystems Production, Transmission, Distribution

Distribution lines with primary and secondary

substations 145-20-0.4 kV

Transmission with lines and substations 420-245-170-145

kV (+ 72kV)

Several concentrated power plants (mainly Thermo and

Hydro) connected to 420 kV and 145 kV

with POWER FLOW IN ONE DIRECTION

2000 2010 < 2000

Evolution of Italian electric system


2000 2010 < 2000

Saet provided Protection & Control for generators bays …

Protection and control system for 800 MW power plant in Simeri Crichi (CZ)

3 HV GIS generator bays

1 GIS Line bay

3 Generator Bays

MV protection (105)

LV protection (95)

+ HMI system, with SGE redundancy and Protection

+ double ring Lan with distributed switches


… & started to play as turn key supplier for grid substations integrating

power, protection & control

400 kV Substation annexed to a 470 MW combined cycle in S. Severo (FG)

400kV Substation

Single AIS Bay

20kV-480MVA Generator syncronous

complete with

Protection and Supervision

System SCADA

2000 2010 < 2000

2007 2008 2009 2010 2011 2012

87 432 1142

2800

12500

16350

MW

2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

664 780 874 1131 1639

1908

2714

3538

4898

5850 6600

8208

MW

Wind 8,2 GW-13,2 TWh/y


2000 2010 < 2000

After year 2000 Wind and PV generation capacity connected to the grid

had a great increase

Solar 16,6 GW-18,8 TWh/y

From traditional generators to renewables:

2000 2010 < 2000

Starting to deeply modify grid assets

Before RES

With RES

Per visitare SAET

Turn key supply of

4,8MW rooftop PV

plant in Giammoro,

Pace del Mela (ME)

Producer SS & TERNA

SSE for 48MW PV plant

in Canaro (RO)

Primary cabin, deliver

and producer SS for wind

farm in San Gregorio

Magno (SA)


2000 2010 < 2000

Renewables lead SAET to play a major role as EPC


2000 2010 < 2000

The growth of random and non-predicatble RES production brought to:

Frequency

Loads Production

• Unbalance issues in grid management

• Increase of power flow on critical

sections of transmission grid

• Regulation issues

◦higher frequency variation due to lower

system inertia

◦reduction of regulating capacity

• Issues in reactive power regulation

Requiring new solutions to manage the grid

Smart grid: new concept of the grid with structures and procedures to:

Energy storage to:

Optimize RES production

Support grid balance

Decrease congestions (possibility to

defer production and consumptions)

Guarantee continuous and high quality

energy supply

2000 2010 < 2000

increase grid safety and reliability;

improve RES management and load control;

increase energy efficiency



SAET mission: turn grid and electrical systems skills into

competitive solutions for the next challenges of energy market

SAET works

here

(HW & grid

communication)

as SYSTEM

INTEGRATOR

POI project promotes the improvement of distribution grid in Southern Italy regions

with high RES penetration providing the possibility to test Energy Storage Systems in

primary substations to:

SAET experiences in Energy storage

1) ENEL POI project: ESS in MV substation of distribution grid

reduce the variability of power flow due

to wind gusts or the passage of clouds

make the exchange of energy profiles

between HV/MV substations and

National grid more predictable

SAET role


BMS

P, Q, … setpoint

Storage feedback

SAET

SAET

BATTERY

Start, stop &

feedback

P, Q, …

setpoint

EESS

feedback

SUPERVISION

&

CONTROL

SYSTEM

GRID

PCS

transformer +

switchgears &

controls

Nr 3 40 ft containers

batteries +

PCS

Commissioning

March 2014

Turn key supply 2MW/1MWh for Campi Salentina (LE) primary cabin


Battery technology: lithium ion (NCA)

Nr cycles: 2000

Round trip efficiency: 85%

Installation area: 220 m2

Project schedule: Q4 2012-Q1 2014

Campi Salentina ESS functions:

Main target: RES integration with predictable profile

Time shift + peak shaving

Power balancing (mitigation of RES random production)

Power quality (compensation of voltage gap and unbalance,

harmonic compensation)

Frequency and voltage regulation

Power factor correction

Black start


Nr inverter:

8 …

BMS BMS BMS BMS BMS BMS BMS BMS

Nr battery strings

4

For each inverter:

20 kV

400 V

250 kVA 700 V

39,5

kWh

250 kVA

39,5

kWh … … 39,5

kWh

39,5

kWh … …


ESS details

19 module

14 cells (7S2P)

string (ESSU) 29 modules

4 ESSU

cell

Energy Storage System Unit characteristics

BoL Energy 39.5 kWh

Nominal voltage 730 V

Max Discharge power, continuous @ 100% SOC, 25°C 142 kW

Max discharge current 180 A

Weight 750 kg


ESS details


Supervision & control system

PC SCADA (+ HMI) for data

storage & management of «slow»

events and alarms

PLC for ESS control monitoring

system status and managing

commands and control logics

Modbus TCP protocol for

diagnostics and data storage

CAN OPEN protocol for fast

feedback (from BMS & PCS) &

command set

IEC 61850 for ENEL remote control

plant solutions

components and

technical solutions

SW and control

competences

SAET experience from Campi Salentina ESS


NEW


Per visitare SAET

Fonte: ES

POI

Development plan

Energy

Defense plan

Power

UB reduction

1°

2°

3°

Offgrid & microgrid

projects

Generation Transmission Distribution User

HV GRID

HV/MV

AUXILIARIES

LV dedicated

power supply

Diesel

generator

Energy

Intensive

Power

Intensive

2) Power & Energy projects for transmission grid


Casuzze ?

Applications: electrical system safety on Italian major islands

Reserve and frequecy/power regulation (support to low system

inertia coming from traditional generators)

Voltage regulation

Power quality

Integration with TSO grid management systems

Defense plan 2012 – 40MW SdA Power Intensive

Technical details:

Storage technology: lithium ion and NaNiCl2

Low energy/power ratio (<5)

Fast response time

1° PHASE: Storage Lab – 16MW

7 ESS:

5 lithium

2 sodium

Codrongianos

1MW/1MWh lithium

turn key supply

1 MW/2MWh sodium

plant integration

SAET


battery

container

MV + PCS +

scada container

Details: turn key supply Storage technology: LiFePO4

Nr cycles: 4000

Round trip efficiency: ~ 85%

Delivery date: Summer 2014

15kV

800V

Nr 2

40 ft containers

BATTERY STRING DETAILS

Nominal Voltage(V) 793

Voltage range (V) 694-892

Nominal capacity (kWh) 147

Max discharge current (A) 200


Battery technology: lithium ion (LiFePO4)

Nr cycles: 4000

Round trip efficiency: 85%



Turn key supply 1MW/1MWh lithium for Codrongianos (SS) substation

Nr inverter:

1

Nr battery

strings

8

cell

module 4 cells (4S)

string 62 modules


Turn key supply 1MW/1MWh lithium for Codrongianos (SS) substation

PC SCADA (+ HMI) for data

storage & management of

«slow» events and alarms

PLC for ESS control

monitoring system status and

managing commands and

control logics

Modbus TCP protocol for

diagnostics and data storage

CAN OPEN protocol for fast

feedback (from BMS & PCS)

& command set

IEC 61850 for TERNA

remote control


Battery technology: NaNiCl2

Nr cycles: 4500

Round trip efficiency: ~75-80 %



Plant integration for 1MW/2MWh sodium for Codrongianos (SS) substation

27

battery

container

MV

container

Control

system

PCS

container

Complex plant layout

Specific container solutions

Auxiliaries feeding

!

Applications: reduction of congestions on HV grid portions with high wind penetration

Energy storage capabilities for enough hours to avoid 150kV lines congestion

Support to primary regulation

Increase of tertiary reserve

Voltage regulation

Technical details:

Storage technology: NaS

(provided by TERNA)

High energy/power ratio (>7)

Fonte: TERNA

TERNA Development plan 2011 – 35MW SdA Energy Intensive

3 projects:

Nr 2 12 MW/ 90

MWh installations

Nr 1 10.8 MW/ 81

MWh installation

10.8 MW / 81 MWh

turn key plant in

SCAMPITELLA (AV)


SANC frame contract - first phase

29

• assembly of 9 NAS battery container

• n. 9 PCS container

• MV containers

• MV/LV transformers

• LV container

• diesel supply

• containerized station control system

• MV connection between SANC and

national grid connection point

• batteries-PCS control system

• auxiliaries and cables up to MV level

• civil works

Turn key supply 10.8MW/81MWh NAS plant in Scampitella (AV)

Total timing: 240 days

Area: 8200 m2

HV GRID

HV/MV

LV dedicated

power supply

Diesel

AUXILIARIES



SAET Energy storage projects: technology overview

DISTRIBUTION TRANSMISSION

2MW/1MWh 1MW/1MWh 1MW/2MWh 10,8MW/81MWh

Lithium (NCA) Lithium (LiFePO4) NaNiCl2 NaS

2000 cycles 4000 cycles 4000 cycles 4500 cycles

ή = 95% (Battery) ή = 95% (Battery) ή = 85% (Battery) ή = 75% (Battery)

Energy/Power: 0,5-2 Energy/Power: 0,5-2 Energy/Power: 2-5 Energy/Power: 6-8

450 kg

20 kWh

25 kg

2,5 kWh 3000 kg

225 kWh

18,5 kg

1,5 kWh

12x2,4x2,8 m 9x4x4 m

3MWh 9MWh

12x2,4x2,8 m

1MWh

Role & challenges of a ES system integrator

What’s the role of a system integrator?

It’s not simply

building a

box… Or laying wires…

It’s tailoring the right system

for each application

and make it properly work…

A system integrator…

Has a full overview of applications and technologies …

Time shift

Back up

Arbitrage

Regulation & Load

following

Power quality

Frequency control

Spinning reserve

Peak shaving

Lead acid Lithium

NaNiCl2 NAS

> 1000 cycles

ή < 75%

Energy/Power = 10

4000 cycles

ή = 85%

Energy/Power = 4

4500 cycles

ή = 75%

Energy/Power = 6-8

> 4000 cycles

ή = 95%

Energy/Power = 1

?


Is able to propose the best

plant architectures…

Single line

diagram for

power

applications

Single line

diagram for

power /energy

applications

Single line

diagram for big

energy

applications


can manage components and technical solutions…


Plays a key role for

control and

supervision strategy…

REMOTE CONTROL

CENTRAL

PLC

Field data GRID


Microgrid (on grid & offgrid) : distribution grid with loads, generation and storage

connected to the upper distibution grid on a single node or isolated

36

SAET & the future in Energy storage

Electrical system

knowledge

EPC for RES

System integrator for

Energy Storage

Turn key Energy storage projects for distribution, transmission & generation

Microgrid projects

Energy

efficiency

RES increasing penetration lead to strong issues in the management of the

Italian electric grid requiring new solutions and technologies and energy storage

is one of them

Italian DSO & TSO on going projects are providing the possibility to test the

capabilities of different storage solutions & technologies

System integrators like SAET can play a key role in the development of energy

storage system turning consolidated electrical system skills into new

competences and supporting both partners (battery & PCS producers) &

customers in tailoring the best solution for each application

37

Conclusions

38

Thank you for the attention

overcoming the challenges derived from the transition of...

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