IMPLEMENTING HVDC WITH EXISTING INTEGRATED AC SYSTEMS CIGRE 2012 UNITING THE NATIONS ELECTRIC POWER GRID 20 th CENTURY ELECTRIC Utility Controlled 21 st CENTURY ELECTRIC Customer Desires amp Configurations ID: 724863
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Slide1
THE TRES AMIGAS SUPERSTATION
IMPLEMENTING HVDC WITH EXISTING INTEGRATED AC SYSTEMSCIGRE 2012
UNITING THE NATION’S ELECTRIC POWER GRIDSlide2
20
th
CENTURY ELECTRIC
Utility ControlledSlide3
21
st
CENTURY ELECTRIC
Customer Desires & ConfigurationsSlide4
THREE MAJOR TECHNICAL CONSIDERATIONS IN HVDC IMPLEMENTATION:
HVDC IMPLEMENTATION WITH AC SYSTEMS
INFUSION OF POWER ELECTRONICS
THE DISPATCH OF POWERSlide5
IMPLEMENTING HVDC CONNECTIONS
Long Distance TransmissionLine lossesSystem Voltage Stability/LevelsReactive Power Loading
Steady state Transient Stability Subsynchronous OscillationsLatency issues (
ie Spinning Reserves)Inductive and Capacitive limitation factors
Interconnections
Uncontrolled Load flow problems and bottlenecks
Congestion Issues
Inter Area loop flow
Cascading Blackouts
Oscillation Stability
Frequency control
Voltage Stability
Physical interactions between power systems
Interconnected
AC
Systems require a huge investment in study & analysisSlide6
Implementing HVDC connections
The only way to interconnect large AC power grids with different phases is via HVDC (High Voltage Direct Current) facilitiesAC/DC/AC Stations
Hybrid Transmission systems (AC/DC…DC/AC)Multipoint nodes
Long distance DC Transmission linesHVDC has the ability to control the direction and magnitude of the power flow at each node of a multipoint configuration thereby facilitating the precise needs of the interconnection points without adverse impacts to the interconnecting grid
HVDC has the flexibility not only to adapt to grids with different AC system real time characteristics but to also facilitate optional ancillary services to each interconnection node
–
The Evolution to Fast Acting HVDCSlide7
Implementing HVDC connections
China: Current HVDC National Grid Plan Slide8
Implementing HVDC connections
Europe: Extended Grid Plan
From Iceland (Northwest) to Israel (Southeast)= 3,200 miConcept of grid is 25,000 miles of line
Solar Power
Wind Power
Geothermal
Hydro
Biomass
The new high-voltage network would range from the Sahara to the polar cap. The concept calls for main lines that are 40,000 kilometers long. And parts of it already exist.
Connections already in place
or planned
Vision of ABB
and DLRSlide9
REQUIRED:
DEVELOP A MULTINODE HVDC OVERLAY SCHEME
DEVELOP THE EMS/INTERFACES TO ENABLE AC EMS TO RELIABLY OPERATE HVDC OVERLAY CONNECTIONS
DEVELOP THE SECTIONALIZING EQUIPMENT TI ENABLE FAULT RECOVERY AND SAFE REAL TIME OPERATIONS
IMPLEMENTING HVDC CONNECTIONSSlide10
“Presently, only 30% of all power generated uses power electronics somewhere between the point of generation and end use. BY 2030, 80%of all electric power will flow through power electronics .”
Power electronics moves beyond devices that simply provide increased awareness, such as Phasor
measurement systems. These devices will respond to, interface with and control real time power flows.
From USDOE Office of Electric Delivery and Energy Reliability
INFUSION OF POWER ELECTRONICSSlide11
Benefits of Power electronics
Increased power system reliability and securityIncreased efficiency and loading of existing transmission and distribution infrastructureHuge gains in real time power flow controlImproved voltage and frequency regulation
Improved power system transient and dynamic stabilityMore flexibility in siting transmission and generation facilities
The distinction between consumer devices and utility devices will largely be eliminated electricallyINFUSION OF POWER ELECTRONICSSlide12
21st century smart grid technologies compared with those in use today.
Source: IBM Institute for Business Value
INFUSION OF POWER ELECTRONICSSlide13
The Grid is RELIABLE as long as:
GENERATION = LOAD
It is a single machine that operates at the speed of light
Information is the key to successfully integrate HVDC (
multinode
fast acting) and secure the advantages of the
availbility
of the rapid advances in Power Electronics
THE DISPATCH OF POWERSlide14
DISPATCH EQUATION
Dispatch Equation
Generation + Imports (or- Exports)=LoadGenerators (known)Ties (Import/Export) (known)
Load is increasingly being measured in real-timeTransmission with real time measuredNew Solution every 5 minutes (SCED)
Generation and Load share equally in the
benefits of reliable electric operations
The Dispatch of the Power - The “CASH” RegisterSlide15
Tres
Amigas
- Scope of the BusinessSource:
The National Institute of Standards and Technology (NIST) Smart Grid Conceptual Model
1
2
1
2
Transmission
:
The fundamental offering of
Tres Amigas is transmission service using systems of advanced HVDC,
multinode
design and Power Electronics.
Operations
:
Tres
Amigas
Operations will
serve as the
hub for both the transmission operator and market/exchange services. These functions will utilize Power Electronics and advanced technologies to provide for firming, storage, multiphase use generation and storage.
Clean:
Tres
Amigas
will be a totally green site using very little natural resources empowering
opertions
to enable the clean dispatch of
esources
.
The Tres
Amigas Transmission Superstation can be mapped against the NIST Smart Grid Conceptual Model to illustrate the scope of the Tres Amigas business.Slide16
The
Tres Amigas
SuperStationSlide17
The Electric industry is rapidly evolving to a more customer driven and controlled configuration.
HVDC is worldwide the solution to “improve” the historically developed and mostly dependable integrated AC systems.Implementing HVDC successfully:Multinode
solutionsIntegration with AC control systems
Equipment to operate safely in real timeThe advent of sophisticated power electronics is the means to not only provide the real time situational awareness to improve the reliable operations of the existing integrated AC systems, but will leap the industry to the future with devices that will respond to, interface with and control power flows.
Both load and Generation should benefit equally in the system dispatch.
SUMMARYSlide18
Tres Amigas SuperStation….
Uniting the Electric Grid