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Overview
27/06/2019
What’s CERESIM?
CERESIM is the Simulation department of CERE (Certification Entity for
Renewable Energies)
CERESIM was created as a part of CERE, to be the access key on the target
countries for Renewable Energies, where modeling is required
Our offering includes electrical
studies such grid code
compliance, sizing of reactive
power compensators,
modelling development and
validation, electromagnetic
transient analysis, etc.
CERESIM profile
Although CERESIM is new
department in CERE, its personnel
have more than 10 years
experience in the field of grid
code compliance studies and
electrical assessment of
renewable power plants
In order to be updated with the state of the art of the
business, CERESIM participates actively in several
International Standardization Committees related to
electrical simulation models, apart from the
Committees where CERE has presence
Electrical Studies
CERESIM has a wide expertise in the field of grid integration studies and grid
code fulfilment according to the requirements of the most relevant TSOs world
wide in terms of renewable energies.
Some of the most important projects carried out recently are located in Spain,
Germany, Morocco, Saudi Arabia, Mexico, USA, South Africa and Jordan
The offered studies include:
✓ Power quality analysis (harmonics and flicker)
✓ Power Flow and shortcircuit analysis (Q sizing included)
✓ Electromechanical transients (FRT)
✓ Electromagnetic transient (overvoltages, insulation related)
✓ Simulation and validation of models.
✓ Compliance with different grid codes simulation requirements.
Electrical Studies
Some about power quality, harmonics specifically
CALCULATION
– Integration of model and measurements
• WTG/PV Inv – Current sources
• PoC – Voltage source
• IEC 61000-3-6 (PowerFactory)
RESULTS
– Reporting
• According to TSO / DSO
requirements
• According to Client’s
requirements
Wind and PV Converters
– Modelling
• IEC 61400-21 (Power Quality
assessment)
• PowerFactory model
POINT OF CONNECTION
– Measurements
• IEC 61000-4-30
• Specific procedure of target
country
Method: National requirements (PO9, G5/4, IEEE519, etc.) + IEC standards
Steps of the process
Electrical Studies
Picture of harmonic results in any condition of operation
– Exemplary figure:
• X axis, from 0 to 50: harmonic order
• Y axis, from 1 to 12: production of the wind power
plant
• Z axis, from 0 to 1.4: amplitude of the harmonic in %
– Dependency of the results:
• Production of the Wind Power Plant
• Operation mode of the Wind Power Plant
• Status of the reactive power compensation system
Complete set of results – Custom reports
Different conditions, different values
Some about power quality, harmonics specifically
Electrical Studies
Some about Q sizing
OPTIMIZATION
– Criteria
• to minimize the Q compensation system?
• Penalties must be considered
• Statistical information has to be
considered
RESULTS
– Reporting
• Size of Q compensation system
• Dynamic performance of FACTS
• Statistical information of points
not covered
Wind and PV Converters
– Modelling
• IEC 61400-21
• Q limits (check dependencies, e.g.
Active power, temperature, etc.)
GRID CODE REQUIREMENT
– Where to check
– Dependencies:
• Active power? Voltage?
– Dynamics?
Method: National requirements + IEC standards + Economical inputs
Steps of the process
Electrical Studies
Some about Q sizing
Example of reactive power
sizing in a renewable
power plant with energy
storage system.
Inductive limit and
capacitive hysteresis
according charge /
discharge mode
Method: NTS UE 2016 631 / P.O. 12.2
Optimization options Example
Electrical Studies
Some about Fault Ride Through capability
Fault definition
– Modelled in reference software
• Impedance adjustment without WPP
• Depth & time according to standards
Under Voltage Ride Through (e.g. UK)
– Checking requirements:
• Checking the WPP withstand
• Dynamic Grid Support
Over Voltage Ride Through (e.g. ZA)
– Checking requirements:
• Same process than UVRT.
Usually, to verify reactive
current absorption
Definition of voltage profile at POC without WPP → Reporting of WPP parameters facing the fault
Modelling UVRT OVRT
Electrical Studies
Some about EMT studies
ANALYSIS
– Through ATP, PSCAD or similar
• statistical analysis
• considering non linear effects
• according to manufacturer data
RESULTS
– Reporting
• information about overvoltages
• design checking
RENEWABLE POWER PLANT AND POWER
GRID
– Modelling
• Cables & Circuit breakers
• Transformers (hysteresis included)
WHAT TO CHECK, e.g.
– Switching over-voltages
– Transient over-voltages at a CB vs TRV
– Energizing and de-energizing capacitors
– Over-voltages after lightnings
Method: manufacturer data + EMT analysis + statistical analysis
Steps of the process
Electrical Studies
Some about modelling and validation
Measurements of:
• Faults (UVRT and/or OVRT)
• Setpoint changes
Modelling:
• PSS/E? PowerFactory?
• Generic model? User defined?
Validation method:
• FGW TR4? (IEC 61400-27-1 ed1)
• PO 9?
Measurements Simulation Validation
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Tiempo (s)
Governor
Simulación
97.5
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Method: adapting schemes from manufacturer to a particular software + measurements + validation guidelines
oNTS EU 2016/631
“Requirements for Generators”
And particular deviations for
European countries
oP.O.9 - P.O.12.2 - P.O.12.3
oCEI 0-16
oCEI 0-21
oEN 50549-1 / -2
Electrical Studies
Measurements, Simulation and Validation are needed to verify compliance and obtention of
certification according Clients request target countries and grid codes
Method: adapting schemes from manufacturer to a particular software + measurements + validation guidelines
Compliance with different grid codes simulation requirements
oFGW TR3, TR4 and TR8
oBDEW 2008 + AD 2013
oVDE AR N 4110: 2018
oVDE AR N 4120: 2018
oVDE AR N 4130: 2018
oENA-EREC G98
oENA-EREC-G99
• CERESIM is an active member of the
following international committees:
• IEC 61400-21, Measurement and
assessment of electrical
characteristics
• IEC 61400-27, Electrical
simulation models
• We coordinate the national working
group of IEC 61400-21
Standardization activities
CERE’s Renewable Power Plant Certification
➢ CERE is accredited by IAF for renewable power
plant certification according to (among others):
o FGW TR3, TR4 and TR8
o NTS EU 2016/631 “Requirements for
Generators”
o P.O.12.2 - P.O.12.3
➢ CERESIM is skilled to work with different
simulation softwares such as:
o PSS/e
o DIgSILENT PowerFactory
o PSCAD
o MATLAB SIMULINK
o …
References in
electrical studies
Panama
Grid integration studies of a wind power
plant
--------------------------------------------------
Spain, PO9
Modeling with PSS/e of two solar thermal
plants in Murcia and Andalucía
--------------------------------------------------
Spain, PO9
Modeling with PSS/e of a cogeneration
plant in Galicia
--------------------------------------------------
Spain, PO9
Modeling with PSS/e of a Coal Plant
located in Asturias
Some PSS/e references
Morocco
Grid integration studies for 7 PV power
plants
--------------------------------------------------
Australia
Grid impact evaluation of 200 MW of PV
power plant
--------------------------------------------------
Germany, FGW TG3
Simulation and validation of a PV inverter
model in PSS/E, version 34
--------------------------------------------------
Spain
Motor’s Re-acceleration studies in PSS/e
for a refinery
Some PSCAD, SIMULINK and other references
Australia
User-defined modelling of a PV inverter in PSCAD
--------------------------------------------------
Germany
Simulation and validation of a PV inverter model in PSCAD
--------------------------------------------------
Spain. EN 50530.
Type test approval and validation of a PV inverter using SIMULINK
--------------------------------------------------
Spain, PO 12.2
PQ curve and minimum size of capacitor bank for a 42.25MW PV power plant.
Panama
Harmonic assessment of a wind power plant
--------------------------------------------------
Spain, PO9
Harmonic assessment for more than 10 wind power plants in Spain
--------------------------------------------------
South Africa
Static and dynamic grid integration studies for two wind power plants
--------------------------------------------------
Mexico
Complete verification of fulfillment of the Mexican grid code
--------------------------------------------------
Dominica
Update of Electrical Network including energy storage systems (batteries)
Some PowerFactory references
Spain, PO 12.2
Analysis of the fulfilment of PO 12.2 requirements for a 27 MW PE power plant
using Power Factory DIgSilent.
--------------------------------------------------
Spain, PO 12.2
Analysis of the fulfilment of PO 12.2 requirements for a 34 MW PE power plant
using Power Factory DIgSilent.
--------------------------------------------------
Spain, PO 12.2
Analysis of the fulfilment of PO 12.2 requirements for a 22 MW PE power plant
using Power Factory DIgSilent.
--------------------------------------------------
Saudi Arabia
Stability analysis of a PV plant connected to a cement plant in an electrical
island using Power Factory DIgSilent.
Some PowerFactory references
Contact us
Headquarters (Spain)
Calle Valgrande, 18
28100 Alcobendas, Madrid (Spain)
+34 910 614 612
www.cerecertification.com
Disclaimer▪ The proposals referred to herein are tentative and are subject to verification, material updating, revision and
amendment. In particular, the information contained in this document is subject to updating, revision and
amendment. No representations or warranties, express or implied are given by the company or any person
connected with Certification Entity for Renewable Energies(hereafter CERE) Partners as to the fairness, accuracy
or completeness of the information or opinions contained in this document, any presentation made in conjunction
herewith or the accompanying materials and no liability is accepted in respect thereof to the extent permitted by
law. The information contained in this document is not to be relied upon by parties other than the intended
recipients.
▪ Neither CERE nor any other party accepts any liability whatsoever (whether in negligence or otherwise) arising
directly or indirectly, from the use of this document.
▪ This document has not been approved by any competent regulatory or supervisory authority.
▪ This document is being furnished to you solely for your information on a confidential basis and may not be
disclosed. reproduced or redistributed in whole or in part by any medium or in any form to any other person for
any purpose without CERE prior written consent. You shall treat and safeguard as strictly private and confidential
all information contained in this document and take all reasonable steps to preserve such confidentiality. You shall
not use this document or the information contained therein in any manner detrimental to CERE.
▪ This document has been prepared for information purposes only and should not be relied upon or form the basis of
any decision or action by any person.
▪ This document contains forward-looking statements that involve substantial risks and uncertainties and actual
results are development may differ materially from those expressed or implied by these statements by a variety of
actors.
▪ You should not place undue reliance on statistical data cited in this document.
▪ By accepting this document and attending the presentation you agree to be bound by the foregoing limitations.
