Răzvan GUZUN


25-37 UN NOU CONCEPT DE SISTEM INTEGRAT AL SERVICIILOR AFERENTE S.E.N. DEDICAT ANSAMBLULUI DE CENTRALE, STAȚII CU REȚEUA DE RACORD ELECTRIC–C.S.R.E. – O PRIVIRE GLOBALIZATĂ –

A NEW GLOBAL CONCEPT FOR THE INTEGRATED
SYSTEM OF SERVICES DEDICATED TO
THE ASSEMBLY OF STATIONS, SUBSTATIONS
AND ELECTRIC POWER GRID
– CSRE, SEEN AS A WHOLE –
The proposed work has, as a primary aim, the analysis of internal
technologic consumption CPT given by the inner network of internal consumers
– so called the ancillaries – sustaining each individual component from the
general assembly of CSRE – stations, substations, and electric power grid to run
properly with their sensible direct influence over the generating and transporting
at the effective cost of electricity.
This first part of this study, quite a classical one – standing also as
basic support for our courses, gives also new insights for the students
regarding each component from the CSRE family: complex phenomena onto
the power contour for every independent component running stable for its
own, regarding the power stations, substations and the interconnecting
transporting networks – all in order that every individual component is to give
its own contribution for stable operation, focusing onto the last goal – toward
minimization this overall CPT.
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The second important objective is to show the enlisted so-called
external services performed by every basic elements from the CSRE family,
to sustain the normal-stable running in harmony for the entire global National
Power System called SEN, as a whole. The external services offered by
every component from CSRE toward the general assembly of SEN are to
define today one modern basic pack of functions, as a new global vision,
toward stability at reduced cost.
This pack of external services has a dynamic character, being one
continue expanding and sustained process of up-grading within its specific
frame and limits of dedicated applications: from each component to the
whole assembly of the National Power Grid called SEN, through this
balanced package of so-called system’s external services.
The third objective is to add some more clear understanding to the
reader’s for this genuine overall academic concept regarding the family of
pertinent services – both internal and external – which should be seen as
one reliable and basic starting point for every TSO-dispatching entity,
conducting to one improved running stability for the Electric power system,
national scale, called SEN.
This frame of discussion seen furthermore at European coverage –
called at UE scale – as ENTSO-E, the study through this original point of view
is to gain one overall extension, seen in future – as tending to planetary
scale.
Keywords: stations, substations, and electric power grid – CSRE,
national power system-SEN, European Power System-ENTSO-E, internal
system of services-SSI, dedicated for every components from SEN, external
system of services-SSE, dedicated to the SEN incorporated into ENTSO-E
Cuvinte cheie: centrale, stații și rețele electrice-CSRE, sistem
energetic național-SEN, sistem energetic European-ENTSO-E, sistemul
serviciilor interne-SSI, individual dedicat componentelor SEN, sistemul
serviciilor externe-SSE, dedicate ansamblului SEN, încorporat ENTSO-E
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19-45 EVALUAREA UNEI INVESTIŢII AVANTAJOASE: MICRO HIDRO CENTRALA MHC CIUREL– LACUL MORII

THE ASSESSMENT OF A PROFITABLE INVESTMENT:
SMALL HYDRO POWER PLANT SHPP
CIUREL– LACUL MORII
This study presents the huge advantages balanced by some
drawbacks when the selected site for a new SHPP belongs to a particular
frame, already in partial operation. The dam is finished, also the hydro power
conduit is quite done so, and the SHPP is just waiting to be installed, in spite of
the well-known consistent specific expenses for such particular investment into
one HPP of small rated power capacity. The practical exercise regarding such
particular investment clearly reveals – at a glance – its profitable character.
Keywords: dam, hydropower AHE, micro hydro central MHC, hydro
HA, TH hydraulic turbine, hydro asynchronous/synchronization
Cuvinte cheie: baraj, amenajare hidroenergetică AHE, microhidro
centrală MHC, hidroagregat HA, turbină hidraulică TH, hidrogenerator asincron/
sincron HGAs/HGS

45 EVALUAREA UNEI INVESTIŢII AVANTAJOASE


23-38 APORTUL R.A.T. DIGITAL ÎN EXTINDEREA DOMENIULUI CAPACITIV DE FUNCȚIONARE AL UNEI C.H.E.

H.P.P. EXTENDED OPERATIONAL CAPACITIVE REGIME
WITHIN THE CONTRIBUTION OF ONE DIGITAL A.V.R.
The paper presents some important aspects regarding the extended
capacitive field of operation for one Hydro Power Plant – HPP with the
contribution of a digital Automatic Voltage Regulator AVR. As we do know, the
capacitive regimes are more difficult to be operated for one remote HPP and,
from here, the AVR found to work properly could be considered to be the
proper chosen one. Among AVR chosen to control at the best such regimes,
devoted for special cases with remote HPP are preferred those of digital type.
The paper presents by comparison, two types of different AVRs at work – one of
old classic type SAREX 42 A vs. the newer digital one, of much more improved
performances, called type SRAT-N.
Cuvinte cheie: sistem de excitație SE, sistem de reglare automată a
tensiunii SRAT, hidrogenerator sincron HG, centrală hidroelectrică CHE
Keywords: system excitation SE, automatic voltage regulator AVR,
hydroelectric generator HG, hydroelectric power plant HPP

23-38 APORTUL R.A.T. DIGITAL ÎN EXTINDEREA DOMENIULUI CAPACITIV DE FUNCȚIONARE