MADEIRA RIVER HVDC PROJECT CHALLENGES, EXPERIENCES … · 2020-06-24 · conversatorio : sistemas...

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Junio 24Sistemas HVDC

SESIÓN 4 : Lecciones aprendidas de experiencias reales en Sistemas HVDC

Un evento:

MADEIRA RIVER HVDC PROJECT CHALLENGES, EXPERIENCES AND LESSONS LEARNED

DIOGO TOTTI CUSTÓDIOInterligação Elétrica do Madeira S.A.

CONVERSATORIO : Sistemas HVDC

MADEIRA RIVER HVDC PROJECT

CHALLENGES, EXPERIENCES AND LESSONS LEARNED

PRESENTATION JULY 24TH, 2020

OVERHEAD LINE – BIPOLE 1

± 600kV DC – Coletora Porto Velho-Araraquara 2

Lot D – Auction ANEEL-007/2008

CONVERTERS STATIONS – BIPOLE 2

500 kV CA / ±600 kV DC – 3,150 MW

Lot F – Auction ANEEL-007/2008


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- Presentation of the project;

- Main characteristics of Bipole 2converter stations;- Converter transformers- Valves- AC filters- DC filters- Controls

- Main characteristics of OHL;


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- Physical characteristics of theMadeira River;

- Challenges, experiences and lessonslearned;

- Negative Aspects;

- Positive Aspects.


The Madeira River Complex is a mega-project in Brazil's western Amazon.

Two huge hydroelectric dams – Santo Antônio (3,150 MW) and Jirau (3,750 MW) Cost: US$ 15 billion

The Rio Madeira HVDC System is a HVDC Transmission System in Brazil, built to export power from the new hydro power plants on the Madeira River in the Amazon Basin to the major load centres of

southeastern.

The system consists of two converter stations at Porto Velho - RO and Araraquara - SP, interconnected by two bipolar ±600 kV DC overhead lines with a capacity of 3,150 megawatts each and 2,385 km.

Cost: US$ 1.8 billion

A 800 MW back-to-back station in Porto Velho is also part of the system. Hence the total export capacity of the Porto Velho station is 7,100 MW: 6,300 MW from the two bipoles and 800 MW from the two back-to-

back converters.


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82 Municipalities5 States



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JTE/PLENAL V T

UHE Jirau

BIPOLO 2

BIPOLO 1

ELETRONORTE

UHE Santo Antônio

ELETRONORTE

STATE GRID

IE MADEIRA

Norte Brasil / Evoltz

IE MADEIRA

ELETRONORTE

Araraquara 2Coletora Porto Velho

C2

C1

C3

C2

Margem Esquerda

Margem Esquerda

Margem Direita

Margem Direita

Leito do Rio

C4

C3

C1

Termonorte

CERON

ELETROACRE

SE Araraquara

FURNAS

SE Araraquara

CTEEP

C1

C2

C3

C4

Complexo do Madeira


MAIN SUPPLIERS - BIPOLE 2

• Systems Studies, Projects and Supply of HVDC

Equipment and Systems and Commissioning.

• Design and Supply Materials, Construction Civil Works,

Electromechanical Assembly.

• Global Chain of Suppliers:

Brazil, England, France, China, Germany, Sweden, Italy and Austria


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• AREVA/ALSTOM/GE contract responsibility – The HVDC and AC Filters detailed designs:

HVDC & AC System Studies

HVDC Electromechanical Projects

HVDC & AC Electrical Projects

Assembly Supervision

Commissioning

Start-up - Commercial Operation

• ISOLUX-CORSAN contract responsibility– Bipole 2 detailed designs facilities and civil works:

AC Electromechanical Projects and Auxiliary Services;Design and construction of Earth Electrodes and OHL to Electrodes

HVDC & AC Civil Works, Yards and Buildings

HVDC & AC Electromechanical Assembly Yards, Auxiliary Services & Telecommunications


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• 1) Technology Consulting CESI - Italy:

Validation of HVDC studies presented by GE-UK

Inspections during manufacture – converters transformers and other HVDC equipment

Validation of Type and Routine Tests - converters transformers and HVDC equipment

Validation of Commissioning and Supervision of Commercial Operation

• 2) INOVA & AJA Engenharia:

Validation of project documents

• 3) Teams of employees from FURNAS / CTEEP / CHESF:

Validation of project documents and HVDC studies presented by GE-UK


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OWNER ENGINEERING


Special Purpose Company (SPE):

- CTEEP - Companhia de Transmissão de Energia Elétrica Paulista (51,0%)

- Eletrobrás - FURNAS Centrais Elétricas (24,5%)

- CHESF - Companhia Hidroelétrica do São Francisco (24,5%)

Implementation of Transmission Facilities:

- Lot D / Lot F – Auction ANEEL nº007/2008 – 15/Dec/2008

Construction, Operation and Maintenance – 30 years:

- Transmission Line nº01 ±600kV DC Coletora Porto Velho–Araraquara-2 -2,385 km

- Rectifier Station Coletora Porto Velho nº02, 500k VCA/±600 kVDC – 3,150 MW

- Inverter Station Araraquara-2 nº02, ±600kV DC/500kV CA – 2,950 MW


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POLES POWER CAPABILITY



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Rectifier Basic Control:

- DC current control by firing angle regulation

- Tap-changer control to maintain 10°< α < 16.5°(limited steady state range)


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Inverter Basic Control:

- Vdci control in cascade with gamma control(gamma order = 18.5º)

- Tap-changer control to keep 592.5 kV < Vdcr< 607.5 kV (limited steady state range)


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Pole Power Control:

- Vord is reduced in order to reduce valve winding voltages in overload conditions (rating criteria)


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Power Frequency Control (PFC):


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LOT D OVERHEAD LINE CONNECTED ON BIPOLE 1


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MAIN CHARACTERISTICS - OHL CONNECTED ON BIPOLE 1

Nominal Voltage: ±600 kV DC

Capability 2.0 pu power

Lenght aprox.: 2,385 km – by 5 States e 82 Municipalities

Cable Aluminium Conductor CA-2,282.8 kcmil, 91 wires, 44,253mm diameter (4 conductors/pole)

Spacer-dampers : 600 mm – 4 condutors

Glass Insulators: 300 e 210 kN

Guard Cable 3/8” EAR, 9,144mm diameter

OPGW Cable 36 fibers, 13,4mm diameter

Telecom Repeaters Stations: 7 spaced 300 km


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MAIN CHARACTERISTICS - OHL CONNECTED ON BIPOLE 1

METALLICS STRUCTURES: Brametal & SAE Towers

- Quantity: ~5,000 towers ( 4,000 Guyed-towers & 1,000 Self-supportedtowers).

- About 60,000 ton.

ALUMINUM CABLES: Prysmian, Phelps-Dodge, Alubar, Nexans-Ficap

- About 20,000 km

DC INSULATORS: Electrovidro-Seves

- About 400,000 un.

HARDWARE FOR CHAIN INSULATORS: SAE Towers

SPACER-DAMPER: Salvi

OPGW CABLE : Prismian/Telcon e Procable

TELECOMMUNICATIONS: (in specification)


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MADEIRA RIVER

- Approximately 3,250 km long;

- Biggest tributary of the Amazon;

- Average 31,200 mᶟ/s;

Minimum 2,346 mᶟ/s

Maximum 52,804 mᶟ/s

- Main maintenance activities

from August to October


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MADEIRA RIVER AVERAGE FROM 2016 UNTIL 2019


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CHALLENGES EXPERIENCES

DC OHL along rain forests, swamps and savannas

Compliance with strict environmental legislation requirements

Great number of processes involving land negotiations

Environmental and social mitigation programs, including indigenous areas

Logistic of factory acceptance and delivery of equipment and materials supplied from all over the world (trueglobalized project)

Project management involving different generation and transmission agents


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OHL in operation since August/2013 and converter stations since May/2014

Technical integration involving AC and DC Systems with different agents and manufacturers

BP1 and BP2 belonging to different agents and manufacturers

Respect of intellectual properties of each manufacturer

Integration of the BP1 and BP2 through Mater Control under scope of BP1

Philosophies and strategies involving different manufacturers and the ONS (National System Operator)


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Impact of the grid operation on the commissioning

Converter transformer energization at rectifier end (low damping system)

Joint commercial operation involving Bipoles of different agents and manufacturers

Parallel Operation of Poles involving several different modes

Innovative control (“current balance”) strategy adopted by ABB for parallel operation


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LESSONS LEARNED

Manufacturer expertise;

Interlocutor between different transmission agents;

- decision make

- Master Control overview

- experience in HVDC systems

- neutral viewpoint (impartiality)

State of the art to rebuild the new electrode (several groups involved);- geophysical research for the electrode site selection based on shallow (Wenner) and deep (Magnetotelluric) surveys

RTDS is the main tool for validation tests before commissioning;

Avoid OHL C1 and C2 connected on Bipole 1 (P1 and P2) (option would be the same bidding);


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NEGATIVE ASPECTS

Lack of data, unclear definition of responsibilities and ambiguous requirements of ANEEL Auction;

Absence of specific requirements for joint operation;

Difficulty in exchanging models and important information between the manufacturers due to confidentiality;

The factors above caused many times long-running discussions, re-design during the project and sometimes contractual conflicts.


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POSITIVE ASPECTS

Despite the huge challenges faced and overcome, our facilities have excellent index of availability.


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AVAILABILITY 2018 2019 2020

POLE 3 99,67% 93,60% 100,00%

POLE 4 99,72% 98,94% 99,98%

OHL C1 100,00% 100,00% 100,00%

OHL C2 100,00% 100,00% 100,00%

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Gracias

MADEIRA RIVER HVDC PROJECT CHALLENGES, EXPERIENCES … · 2020-06-24 · conversatorio : sistemas...

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