EU Heroes Workshop 20 September 2018

Overview of PV-ESTIA project

Assoc. Prof. Georgios C. Christoforidis

Technological Research Centre of Western Macedonia Electrical Power Laboratory

EU Heroes Workshop

20 September 2018

Content Structure

1. PV-ESTIA project 2. Research items

The PV-ESTIA

Project

EU Heroes Workshop

20 September 2018

Background

• Looking at the future: NZEB requirement High PV penetration, prosumers only

• More ambitious RES targets, more decreased costs, PV’s

directly competing with traditional sources, strict regulations • Reverse power flows get higher and more frequent

• Concerns: • Overvoltages, protection and coordination issues

• Looking at the future: NZEB requirement High PV penetration, prosumers only

• More ambitious RES targets, more decreased costs, PV’s

directly competing with traditional sources, strict regulations • Reverse power flows get higher and more frequent

• Concerns: • Overvoltages, protection and coordination issues • Mismatch of generation/consumption

Background

Overview of the PV-ESTIA Project

Main objective: To transform buildings into a controllable

energy sources to enhance the transition towards NZEB

concept

By enhancing the integration of

PVs

and

storage systems

in public buildings, taking also into account thermal needs

By developing innovative management schemes (IMS) of

hybrid PV+storage

systems

By validating the proposed solutions via pilot installations

By developing optimization tools to empower

stakeholders and engineers to deal with hybrid PV+storage

systems in the NZEB environment

PV-ESTIA Project Partners

• Aristotle University of Thessaloniki (GR)

• Technological Research Centre of Western Macedonia (GR) • University of Cyprus (CY)

• Electricity Authority of Cyprus (CY) • Energy Agency of Plovdiv (BG)

• SS Cyril and Methodius University in Skopje (FYROM) • Ministry of Environment and Energy/ Directorate for

1. New

joint regulations and recommendations

for

the Balkan-Med region that can be widely applied,

while taking into consideration the specific needs of

each country

2. An

innovative management scheme

for the

optimal exploitation of building’s energy resources

3. Pilot installations

 for the evaluation of the IMS and

 For the construction of a database for typical generation and consumption profiles

4. Two

optimization tools

aiming to empower

stakeholders and engineers to deal with hybrid

PV+storage systems.

Evaluation via Pilots

Evaluation via Pilots

Research items

Works related to battery storage integration in building environment

NZEB model for storage evaluation

[1]

• A techno-economic model to evaluate the economic viability of Li-ion BSSs in the NZEB context

• The proposed model simulates the combined operation of • Photovoltaics

• Solar thermal generators • Heat pump generators • Thermal storage system

• Electrical storage (Li-ion battery)

To represent typical characteristics of NZEBs.

• An optimization algorithm to calculate the optimal size of ESS in terms of NPV is proposed

Case study

• Technical data

• Household located in Volos, GR • Area: 100 m2_{, Height: 3 m}

• Internal air: T=26o_{C (cooling) & T=20}o_{C (heating)}

• Domestic Hot Water Supply=10 kg/min , T=45o_C

• PV: 40 panels x 1.5 m2

• Battery life > 20 years (8000 cycles @ 80% DoD) • Economical data

• Analysis period: 20 years • Inflation rate: 2%

• Interest rate: 5%

Simulation results

A

• Current BSS prices (600 €/kWh) • Investment on BSS NOT profitable • Sensitivity analysis for different prices • For BSS prices

< 200 €/kWh • Investment

becomes profitable

Simulation results

• For current BSS

prices investment on BSS NOT profitable • For lower BSS prices

investment becomes profitable

• Full-NeM – Excess energy is NOT compensated

EVs with PVs and Storage

2

B

The examined network constitutes a real segment of a rural residential DN placed in the Northern part of Greece

Methodology

B

• Each node is considered to host one EV with 12.5 kW nominal capacity

• All EVs are expected to initialize their charging at 20:00 • A PV unit with 7 kWp is installed at each node

• The energy surplus to be stored in ESSs is computed in order to experience 1p.u maximum voltage

Simulation results

Conclusions

• Main activities and expected outcomes of

PV-ESTIA project were presented

• Developed tools will optimize the operation of

BSS in the building environment

• Initial research works focused on economic

evaluation of PV+storage in NZEB environment,

and smart charging of EVs using storage

Thank you!

Georgios C. Christoforidis

[email protected]