IEEE Electrification Magazine - June 2017 - 22
NIIPS electricity market to competition, in both generation and electricity supply, to take effect gradually between 2016 and 2020. Responsibility for operation and
management of NIIPSs in Greece has been assigned to
the Hellenic Electricity Distribution Network Operator
(HEDNO S.A.), which acts as the island generation and
transmission system operator, market operator, and distribution network operator.
To implement market-related provisions, as well as to
effectively perform its role as the NIIPS operator, ensuring
security of supply, quality of service, generation cost minimization, and maximum RES penetration, HEDNO has
recently launched several strategic projects to modernize
its infrastructure, enhance its management capabilities,
and test new concepts and technologies. Such projects
can be grouped as follows:
xx
Deployment of automated metering infrastructure
(AMI) for both consumers and generators, including
smart meters and centralized metering data-management facilities.
xx
Establishment of energy control centers (ECCs) per
island system (local ECCs) and at the premises of
HEDNO headquarters in Athens (central ECC) to
facilitate generation management, as described
in more detail in the "Smart Island Applications" section.
xx
Development of market support information technology (IT) systems and applications.
xx
Advancement of the Smart Island Project to serve as
test beds for innovative technologies and management
solutions to achieve very high levels of RES integration.
Generation Management
Principles
Regulatory Framework
I E E E E l e c t r i f i c ati o n M agaz ine / j un e 2017
UC and Load Dispatch
The basic generation management principles set by the
NII Management Code are in principle the same for all
NIIPS, with slightly diversified (simplified and relaxed)
requirements for the smallest systems. Overall, the generation management in an NIIPS consists of optimal UC scheduling, in
real-time economic dispatch (ED) of
dispatchable units and in output limitations (curtailments) for nondispatchable RES stations with setpoint receiving capabilities (see S.A.
Papathanassiou and N.G. Boulaxis).
UC and ED seek an optimal solution
satisfying the principal objectives of
maximizing RES energy absorption
and minimizing conventional unit
variable operating cost, while observing fundamental security and other
technical operating constraints.
According to the NII Management
Code, three main processes constitute
the day-ahead and intraday generation management: rolling day-ahead
scheduling (RDAS), dispatch scheduling (DS), and real-time dispatch (RTD), whose temporal relation is depicted in Figure 8.
The first step is the execution of RDAS, which constitutes a UC optimization problem consisting of two separate processes:
HEDNO has recently
launched several
strategic projects
to modernize its
infrastructure,
enhance its
management
capabilities, and
test new concepts
and technologies.
For generation management, the NII
Management Code foresees the implementation of optimal unit comm i t ment (UC) and load dispatch
methodologies, whose main objectives
are security of operation, maximization of RES energy absorption, and
minimization of conventional unit
operating costs, as well as objectivity
and transparency in the calculation of
final customer costs. For this purpose,
the NIIPS operator is obliged to implement all necessary facilities, including
ECCs and certified metering and information systems, as well as to develop
the necessary methodological infrastructure. Optimal generation management in Greek NIIPSs remains a great
challenge, because of the diversity of their electrical characteristics, the variety of existing or forthcoming RES and
storage stations in commercial operation by third-party
22
producers, and the high levels of RES penetration (see
N. Hatziargyriou et al.).
The NII Management Code classifies generation units
in a technology-neutral manner, based on their dispatchability/controllability properties and status of market
participation, as follows:
xx
Dispatchable units with energy offers to the day-ahead
scheduling: Units in this category are considered fully
controllable, and their production can vary at any level
between their minimum and maximum technical
limits. This category mainly includes conventional
generating units and HPSs.
xx
Dispatchable units with hourly power offers to the dayahead scheduling: Units in this category are considered
partially controllable, because their production can
vary at any level between their technical minimum
and the maximum output declared at their offer for
the specific hour. This includes RES units such as
hydro, biomass/biogas, geothermal, and concentrating
solar power.
xx
Nondispatchable RES units: This category includes RES
units that do not fit in the two previous sets, mainly
already-established RES technologies, such as wind
parks and PVs, whose output can be limited by an
upper-level dispatch command (set point).
Table of Contents for the Digital Edition of IEEE Electrification Magazine - June 2017
IEEE Electrification Magazine - June 2017 - Cover1
IEEE Electrification Magazine - June 2017 - Cover2
IEEE Electrification Magazine - June 2017 - 1
IEEE Electrification Magazine - June 2017 - 2
IEEE Electrification Magazine - June 2017 - 3
IEEE Electrification Magazine - June 2017 - 4
IEEE Electrification Magazine - June 2017 - 5
IEEE Electrification Magazine - June 2017 - 6
IEEE Electrification Magazine - June 2017 - 7
IEEE Electrification Magazine - June 2017 - 8
IEEE Electrification Magazine - June 2017 - 9
IEEE Electrification Magazine - June 2017 - 10
IEEE Electrification Magazine - June 2017 - 11
IEEE Electrification Magazine - June 2017 - 12
IEEE Electrification Magazine - June 2017 - 13
IEEE Electrification Magazine - June 2017 - 14
IEEE Electrification Magazine - June 2017 - 15
IEEE Electrification Magazine - June 2017 - 16
IEEE Electrification Magazine - June 2017 - 17
IEEE Electrification Magazine - June 2017 - 18
IEEE Electrification Magazine - June 2017 - 19
IEEE Electrification Magazine - June 2017 - 20
IEEE Electrification Magazine - June 2017 - 21
IEEE Electrification Magazine - June 2017 - 22
IEEE Electrification Magazine - June 2017 - 23
IEEE Electrification Magazine - June 2017 - 24
IEEE Electrification Magazine - June 2017 - 25
IEEE Electrification Magazine - June 2017 - 26
IEEE Electrification Magazine - June 2017 - 27
IEEE Electrification Magazine - June 2017 - 28
IEEE Electrification Magazine - June 2017 - 29
IEEE Electrification Magazine - June 2017 - 30
IEEE Electrification Magazine - June 2017 - 31
IEEE Electrification Magazine - June 2017 - 32
IEEE Electrification Magazine - June 2017 - 33
IEEE Electrification Magazine - June 2017 - 34
IEEE Electrification Magazine - June 2017 - 35
IEEE Electrification Magazine - June 2017 - 36
IEEE Electrification Magazine - June 2017 - 37
IEEE Electrification Magazine - June 2017 - 38
IEEE Electrification Magazine - June 2017 - 39
IEEE Electrification Magazine - June 2017 - 40
IEEE Electrification Magazine - June 2017 - 41
IEEE Electrification Magazine - June 2017 - 42
IEEE Electrification Magazine - June 2017 - 43
IEEE Electrification Magazine - June 2017 - 44
IEEE Electrification Magazine - June 2017 - 45
IEEE Electrification Magazine - June 2017 - 46
IEEE Electrification Magazine - June 2017 - 47
IEEE Electrification Magazine - June 2017 - 48
IEEE Electrification Magazine - June 2017 - 49
IEEE Electrification Magazine - June 2017 - 50
IEEE Electrification Magazine - June 2017 - 51
IEEE Electrification Magazine - June 2017 - 52
IEEE Electrification Magazine - June 2017 - 53
IEEE Electrification Magazine - June 2017 - 54
IEEE Electrification Magazine - June 2017 - 55
IEEE Electrification Magazine - June 2017 - 56
IEEE Electrification Magazine - June 2017 - 57
IEEE Electrification Magazine - June 2017 - 58
IEEE Electrification Magazine - June 2017 - 59
IEEE Electrification Magazine - June 2017 - 60
IEEE Electrification Magazine - June 2017 - 61
IEEE Electrification Magazine - June 2017 - 62
IEEE Electrification Magazine - June 2017 - 63
IEEE Electrification Magazine - June 2017 - 64
IEEE Electrification Magazine - June 2017 - 65
IEEE Electrification Magazine - June 2017 - 66
IEEE Electrification Magazine - June 2017 - 67
IEEE Electrification Magazine - June 2017 - 68
IEEE Electrification Magazine - June 2017 - 69
IEEE Electrification Magazine - June 2017 - 70
IEEE Electrification Magazine - June 2017 - 71
IEEE Electrification Magazine - June 2017 - 72
IEEE Electrification Magazine - June 2017 - 73
IEEE Electrification Magazine - June 2017 - 74
IEEE Electrification Magazine - June 2017 - 75
IEEE Electrification Magazine - June 2017 - 76
IEEE Electrification Magazine - June 2017 - 77
IEEE Electrification Magazine - June 2017 - 78
IEEE Electrification Magazine - June 2017 - 79
IEEE Electrification Magazine - June 2017 - 80
IEEE Electrification Magazine - June 2017 - 81
IEEE Electrification Magazine - June 2017 - 82
IEEE Electrification Magazine - June 2017 - 83
IEEE Electrification Magazine - June 2017 - 84
IEEE Electrification Magazine - June 2017 - 85
IEEE Electrification Magazine - June 2017 - 86
IEEE Electrification Magazine - June 2017 - 87
IEEE Electrification Magazine - June 2017 - 88
IEEE Electrification Magazine - June 2017 - Cover3
IEEE Electrification Magazine - June 2017 - Cover4
https://www.nxtbook.com/nxtbooks/pes/electrification_december2022
https://www.nxtbook.com/nxtbooks/pes/electrification_september2022
https://www.nxtbook.com/nxtbooks/pes/electrification_june2022
https://www.nxtbook.com/nxtbooks/pes/electrification_march2022
https://www.nxtbook.com/nxtbooks/pes/electrification_december2021
https://www.nxtbook.com/nxtbooks/pes/electrification_september2021
https://www.nxtbook.com/nxtbooks/pes/electrification_june2021
https://www.nxtbook.com/nxtbooks/pes/electrification_march2021
https://www.nxtbook.com/nxtbooks/pes/electrification_december2020
https://www.nxtbook.com/nxtbooks/pes/electrification_september2020
https://www.nxtbook.com/nxtbooks/pes/electrification_june2020
https://www.nxtbook.com/nxtbooks/pes/electrification_march2020
https://www.nxtbook.com/nxtbooks/pes/electrification_december2019
https://www.nxtbook.com/nxtbooks/pes/electrification_september2019
https://www.nxtbook.com/nxtbooks/pes/electrification_june2019
https://www.nxtbook.com/nxtbooks/pes/electrification_march2019
https://www.nxtbook.com/nxtbooks/pes/electrification_december2018
https://www.nxtbook.com/nxtbooks/pes/electrification_september2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2018
https://www.nxtbook.com/nxtbooks/pes/electrification_december2017
https://www.nxtbook.com/nxtbooks/pes/electrification_september2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2017
https://www.nxtbook.com/nxtbooks/pes/electrification_june2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2016
https://www.nxtbook.com/nxtbooks/pes/electrification_september2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2016
https://www.nxtbook.com/nxtbooks/pes/electrification_march2015
https://www.nxtbook.com/nxtbooks/pes/electrification_june2015
https://www.nxtbook.com/nxtbooks/pes/electrification_september2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2014
https://www.nxtbook.com/nxtbooks/pes/electrification_june2014
https://www.nxtbook.com/nxtbooks/pes/electrification_september2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2013
https://www.nxtbook.com/nxtbooks/pes/electrification_september2013
https://www.nxtbookmedia.com