Transcript Diapositiva 1

Access and Connection processes for Renewable
Units:
Experiences from Red Eléctrica de España
Istambul
March 2011
RED ELÉCTRICA DE ESPAÑA
Recent modifications of regulation for Special
Regime Generation (SRG)
Recently, National regulation oriented to control of generation to be connected per year,
securing economic and technical sustainability

RD1578/2008 for Solar FV, extending RD661 objectives with quotas of 500-400 MW per
year with progressive reduction of tariffs
 emphasis on roof plants over floor plants

RDL6/2009 for the rest of SRG, establishing quotas per year for plants to be
commissioned (upto ≈ 2,5 GW Solar Thermal in 2013; upto ≈ 23 GW Wind in 2012),
demonstrating some pre-requisites:

Access and connection authorization issued by REE or distribution company

Administrative authorization for power plants > 100 kW

License for Commissioning

Deposit of a bank guarantee (for wind: 20€/kW; for Solar Thermal: 100€/kW)

Financial resources at least for 50% of the total

Purchase -or contract- at least for 50% of the equipment

Authorisation for gas access and water supply (when applicable)
RED ELÉCTRICA DE ESPAÑA
Development and Access to the Network
Capacity of the Transmission Network for Generators:
 General: No grid capacity reserve or preference derives from
temporal precedence. Possible production constraints are to be
solved by market mechanisms
 No connection limitation: Newcomers may degrade the production
possibilities of existing or previously foreseen
 Less barriers but more uncertainty  tendency to overinstallation
 Special Regime Generation
 Priority at dispatch, subject to system security
 operation risk
 Congestions motivate system development  ineffective planning
Connection limitation according to zonal studies from OS
3
RED ELÉCTRICA DE ESPAÑA
Network Access and Connection: Transmission grid
development implications from RES units

Number of Access applications very
transmission nodes evacuation capacity
over
some

Regional limits for installing new generation

Wind farms building time much shorter than needed for
network developments necessary for connection

Permissions for new generation
(via Regional
Administration) easier to get than network reinforcement
ones
RED ELÉCTRICA DE ESPAÑA
Interaction between Grid Planning and Access to the
grid applications
Grid Planning
Access to the grid
• REE carries out planning studies and proposals
Regulated continuous process
• National Goverment (with Regional Administrations):
by
approve the grid development plan
acceptability
• Every 4 years, new planning horizon (10 years)
Binding (unlike indicative planning for generation)
which
REE
transmission
assess
of
the
non-
facilities
applications
Studies for SRG
Integration
The actual development of the grid (authorization, construction and
commissioning) takes from 1 to more than 10 years

5
RED ELÉCTRICA DE ESPAÑA
SRG Integration Studies
A new perspective is introduced
From ¿What capacity of integration ?

To ¿Which conditions and requisites
Regulation
Proposals
would be needed to maximize secure integration of SRG
(RES) and achieve the foreseen objectives?
Bulk System or
Coverage Studies
(Single Bus System
Adequacy Studies)
Grid Studies
Estimation of Operation
Conditions
Zonal connection capacity in MW
6
RED ELÉCTRICA DE ESPAÑA
Capacity Studies

Assessment of generation limits to preserve adequacy and security of power
system, according to planning and operation criteria, applied to an horizon within the
current medium term grid development plan

Adequacy: Assessment of generation limits by nodes and zones, reflecting
structural grid capacity

Steady State Behaviour (load flow contingency analysis)

Short-circuit power (5% Scc, for non dispatchable fluctuant
generation)

Security: Validation of previously concluded limits by nodes and zones


Dynamic behaviour (stability after short-circuit)
Design criteria: buses with sufficient meshing, minimum magnitud for
generation, …..
7
RED ELÉCTRICA DE ESPAÑA
Development and Access to the Network for Renewable
Generators (RES): Connection Capacity
Preserving the security of supply requires to avoid persistent
constraints from RES units in order to:
Limit the operational risk associated to the solution of constraints and the
security guarantee, specially considering the dispatch priority


Enable a coherent and efficient grid development
This calls for establishing connection capacities by zone associated to
grid development plans which may avoid permanent constraints

8
RED ELÉCTRICA DE ESPAÑA
Access and Connection : Overview

Procedures for Access and connection are managed by REE, as System
Operator and and Transmission owner. Main Features:
Main Perspective
Object - Scope
Access
System Operation
System behaviour
Connection
Transmission
Engineering and Physical Feasibility
Connection Contract (CC)

REE carries out capacity studies at nodal and regional levels  Capacity of Connection

Regional Administrations identify Coordinator (C) and generators

C accomplish Access and Connection Procedures  Connection Authorisation

Connection Authorisation enables Administrative Authorisation

Administrative Authorisation enables Connection Contract with Transco

Administrative process (*) different according to Regions

Recently, new national regulation oriented to control of generation to be connected per
year, securing economic and technical sustainability (National Administration)
9
RED ELÉCTRICA DE ESPAÑA
Access and Connection : Overview

Procedures

Access Application (m = month)
 Connection to Transmission
>>>
 Connection to Distribution (> 10 MW.)
> DO> SO (REE)
SO (REE)
2m
REE issues a report evaluating access feasibility, fulfilling system security criteria

Connection Application
>>>
Trans.Co.
Agent submits engineering Project and Programme
 Trans.Co. elaborates Report of Technical Conditions for Connection
 SO (REE) supervises and issues a report
Agent
1m
1m
< TECHNICAL ACCESS CONTRACT> Transmission Company
10
RED ELÉCTRICA DE ESPAÑA
Access approach for special generation

REE carries out Regional studies assessing capacity connection for
generation (depending on energy source and technology), which are
sent and presented to Regional Adm.

Individual Applications: Access reply is informative not valid for
connection procedure

Regional Adm. Identify (*) generators according and nominates
Coordinator

Coordinator submits access application with the aggregation of
individual plants sharing connection point and facilities

REE replies according to the Regional study, accomplishing access
procedure and enabling to start and accomplish connection procedure:
Connection Authorisation

Connection Authorisation enables Administrative Authorisation

Administrative Authorisation enables Access Technical Contract with
Transco

Administrative process (*) different according to Region
11
RED ELÉCTRICA DE ESPAÑA
Regulation for connection and Administrative Authorisation for Special
Regime (renewable) units
Bank Guarantee to cover
TSO access + connection
management expenses
Application
Coordinated
Application
Electrical
Procedures
Regional
administrative
Authorization
Special Regime Register (Spanish
Industry Ministry)
An additional bank Guarantee is
required by National Administration
Access
Access
Connection
Administrative
Authorisation
Connection
Contract
Previous Inscr. In
Register
Requirements
Authorisation
PESp
Production Control
Checks
Report by SO: Acess,
connection, integrat. at Control
Center and Operating
procedures fulfillment
GUARANTEE
CANCELATION
Commissioning
Certificate
Definitive Inscription
(after 85% of objective 
final date)
Commissioning
12
RED ELÉCTRICA DE ESPAÑA
Grid development
WIND POWER: High presence in
transmission (>60%, contrary to
other systems with high penetration)
and expected to increase
NºNodesRdT
Today
220 & 400 kV
Future
49
> 100
150 MW
250 MW
150 MW
250 MW
22 MW
SOLAR POWER:
100 MW
TS.- Majoritary in transmission (≈ 80%)
4.293 MW
FV.- Minoritary in transmission(≈ 5% of
existing; few new plans)
2.960 MW
41 MW
400 MW
3.830 MW
49 MW
435 MW
1.800 MW
Grid Applications: 14.730 MW
T: 11.583 MW
D: 3.147 MW
13
RED ELÉCTRICA DE ESPAÑA
Main challenges: Grid Development
 RES generation does not avoid distribution grid but requires transmission
expansion, where the majority of Wind Power (>60%) and Solar Thermal (>80%) is
expected. RES is a relevant motivation in the current Plan:
 new lines and reinforcements for avoiding constrains operation
 facilities associated to physical connection
OH Circuit [km]
UG Cables [km]
Uprating lines [km]
SS [nº bays *]
Transformers [MVA]
Reactors [Mvar]
Capacitors [Mvar]
12.270
386
8.308
3.476
52.450
2.800
1.100
CORNIDO
VENTORRILLO
GRELA-2
SABON
SABON
LARACHA
MEIRAMA
VIMIANZO
ALUMINIO
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TABIELLA II
TABIELLA II
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PRAGNERES
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VALLEGON
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VILLAMANIN
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BELESAR
CANDO
ACERIASA
CACICEDO CICERO
ASTILLER
SOLORZANO
PENAGOS
SOLORZANO
PENAGOS
PSMIGUEL
VALLE DEL NALON
TELLEDO
CHANTADA
AMEIXEIRAS
TOMEZA
LOURIZAN
PIELAGOS
TORRVEGA
LABARCES
SNIACE
LADA
SAMA
PEREDA
VILLABLINO
SANCOMPO
PDEMOURO
TAMBRE NUEVA
CAYETANO
MDCARRIO
VILLAGARCIA
COSTA VERDE
SILVOTA
SOTORIBERA
VILLALLANA
N. DUMBRIA
TAMBRE II
MAZARICO
UNINSA
SIERO
S.CLAUDIO
GRADO
SALAS
NARCEA
PESOZ
LUGO
DUMBRIA
CARRIO
CARRIO
ABOÑO
TAMON
TAMON
P.G.RODRIGUEZ
PUERTO
MESON VENTO
New substations and bays:
Some 100 buses in 220 kV
and 50 in 400 kV
MONCOFAR
VILLARES
MORA
SAGUNTO
STAPONSA
OLMEDILL
OLMEDILLA
FALAGUEIRA
SIDMED
TSIDMED
MORVEDRE
MORVEDRE
MINGLANILLA
PUZOL
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CARRASES
ELIANA
F.MUESTRAS
CACERES
MADRIDEJOS
ARENALES
PATRAIX
PICON
SAN SERVAN
SAN SERVAN
MERIDA
MONTIJO
STA. TERESA
LAPALOMA
ALARCOS
VALDEPEÑAS
VENTAINES
MAIMONA
SALADAS
ELCHE2
GUADAME
LANCHA
AZAHARA
ROCAMORA
ANDUJAR
UBEDA
MONTEBAJO
PALMAR
PALMAR
ARENAL
ARENAL
CASILLAS
ALMODOVAR
ARNEVA
ULEA
TORREMEN
TORREMEN
MURCIA
BALSICAS
CASAQUEMADA
SALTERAS
ILIPA
SUPERNORTE
ONUBA
VNUEVREY
EMPALME
STAJUSTA
ENCE
CRUZCAMPO
SANTIPON
ESPARTINAS
ALJARAFE
RANILLAS
S.ELVIRA
PITAMO
CABRA
CARRIL
CAPARACENA
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CORBONES
DOSHMNAS
CORNISA
DRODRIGO
PALACIOS
RODANDAL
RODANDAL
ROCIO
GIBALBIN
ARCHIDONA
PADUL
ANTEQUERA
ATARFE FARGUE
GABIAS
TAJOENCANTADA
CADIZ
CARTUJA
CARTUJA
ARCOSFRT
PTOREAL
ATANASIO
JORDANA
JORDANA
GAZULES
TCASARES
MANILVA
PARRALEJO
CARTAMA
CARTAMA
MONDA
COSARIO
ORGIVA
ANTEQUERA 2
TABERNAS
TABERNAS
LITORAL
LITORAL
BENAHADUX
BERJA
L.MONTES
LOSRAMOS
CENTRO
EUROPA
TORREMOLINOS
POLIGONO
ALHAURIN
LA RIBINA
HUENEJA
MONTEALEGRE
SANLUCAR
PURMARIA
ESCOMBRERAS
BAZA
MAZUELOS
ENTRENUCLEOS
ATALAYA
TORARENILLAS
MAR MENOR
FAUSITA
PUENTE GENIL
URSO
ALCORES
SIDERAND
QUINTOS
GUADAIRA
PALOMARES
PALOS
STABARBARA
N.CENTENAR
CENTENAR
VIRGENRO
GUADAIRA
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N C.COLON
ROJALES
TORREVIEJA
SMSALINAS N.
SMSALINAS S.
CAMPOAMOR
HOYAMORENA
ASOMADA
NESCOMBRERAS
COSTALUZ
MTEBELLO
SANTAPOLA
BAJO SEGURA
S.P.PINATAR
TOTANA
OLIVARES
CARMONA
CARMONA
VERGEL
VILLAJOYOSA
CANTALAR
CABO HUERTAS
ALICANTE
S.VICENT
RABASA
PALMERAL
N.SALADAS
PETREL UNIVERSIDAD
ALTET
PEÑARRUBIA
NOVELDA
ALCOLEA
GANDIA
JIJONA
JIJONA
CASTALLA
PETREL ESTE
JANDULA
GUILLENA
P.TABERNES
GANDIA SUR
BENEJAMA
SAX
ARROYOVALLE
PUEBLA DE GUZMAN
VALLDIGNA
MONTESA
PINILLA
BIENVENIDA
BROVALES
ALQUEVA
ALCIRA
VILANOVA
MANZANARES
MANZANARES
ARGAMASILLA
LA NAVA II
LA NAVA
P.LLANO
ELCOGAS
SIBALBOA
BALBOA
TALCIRA
AYORA
ROMICA
BENICULL
ELBROSQUIL
CATADAU
CAMPANARIO
BRAZATORTAS
BRAZATORTAS
TALQUEVA
R-C.REAL
ALBAL
CORTESII
ALMADEN
ALANGE
ELGRAO
F.S.LUIS
LA TORRE
TURIS
TURIS
PTO. LAPICE
LAMUELA
CAMPOMAYOR
SAGRAJAS
SAGRAJAS
ALVARADO
PQ. CENTRAL
TORRENTE
TORRENTE
REQUENA
ELEMPERADOR
VALDECABALLEROS
COFRENTES
VAGUADAS
BENIFERRI
PQ. CABECERA
NOUMOLES
VIVEROS
ALAMEDA
QUARTPOB
ALDAYA
TRUJILLO
ALCUESCAR
ALBURQUERQUE
NERJA
VENTILLA
COSTASOL
BENAHAVIS
N.CASARES
CASARES
PINARREY
S.ROQUE
BARRIOS
MARISMAS
ACERINOX
FACINAS
PTOCRUZ
ALGECIRA
GBRALTAR
TARIFA
Particular significance: Spain-France interconnection
RED ELÉCTRICA DE ESPAÑA
Transmission grid development implications
Cost Allocation of New Facilities ¿transmission border and who pays what?
Operation and
Maintenance Cost
Investment Cost
Directly associated
Assumed by the agent
Transmission to connection
System
Facilities
Structural
Reinforcement
(Agent guarantees 20% of Cost)
Connection Facilities
System
System
Agent
New substation
New as in/out of
bay
existing line
Existing
Substation
New bay
TransGrid
Connection Facilities (no TransGrid)
RED ELÉCTRICA DE ESPAÑA
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