Chce-li být podnik prosperující v tržním hospodárství musí poskytovat konkurence schopné produkty a služby. V našem prípade se jedná prevážne o elektroenergii (výkonovou hladinu, certifikované služby – primární, sekundární potažmo terciální regulace). Havárie zarízení (bloku) prináší velké ekonomické ztráty podniku, jelikož smlouvy uzavírané v elektroenergetice bývají dlouhodobé a jejich nedodržení je striktne penalizováno. Z techto duvodu se do popredí provozování zarízení dostává otázka spolehlivosti, která je vždy kompromisem s ekonomickou otázkou ...
Second chapter deals the thermodynamic of
Combined Cycles.ABSTRACT
The effectiveness diagnostics electrical machines and warning diagnostics
especially has been confirmed more and more. describes fundamental principle Combined Cycles and shows ways
leading the enhancement efficiency and reliability CC.
. Thesis familiarizes with existing diagnostic systems CCPP Vresova and is
seeking for solutions when there store present diagnostic access information
processing. New detection gases that are components of
lignite gas and nature gas, means and CH4, presented upgraded diagnostic
system. Signals that
describe system are selected after initial measurements.
Combustion spare parts were found extremely good condition during combustion
inspection that was made after mentioned yearlong operation. concerns with
fractionation diagnostic systems, with diagnostic simulations and with mathematical
predication conditions diagnosed object. this context realised
measurements and corresponding system were very effective. Solution for burning fuel nozzles primary manifold found sufficient cooling
of nozzles during all operation stages.
Thesis deals the solution for two problems after initiative chapters. New signals are divided proper levels, and system shows
corresponding alarms the operator for particular levels, automatically performing
safety sequences. This part should help the persons concerned
with designing new diagnostic systems. There has not been any
accident with gear since installation this diagnostic system. First three chapters are written the nature of
theoretical introduction the questions Combined Cycle Power Plants and diagnostics. Diagnostic system for accessory gear
like part gas turbine control system introduced one unit. this context realised innovations were very effective and due
to this fact money were saved since there not necessary upgrade fuel nozzles (what
brings additional costs due exchanging combustion section), and since costs for
refurbishment combustion spare parts are lower. Diagnostic methods are widely extended for appreciation quality of
equipments. Increasing requirements service life and
reliability electrical machines can realized only with use modern diagnostic systems
and methods. Diagnostic system fragmented accordance with
introductory chapter. Periodical and continual measurements are unavoidable when equipment is
installed site (especially for large machines). The reason for is, that they enable detect
inception prospective defects systems time and due this fact they help prevent
from accidents. This part should help for
perfection operation effectiveness. New system was operating first unit for one year normal commercial
operation without significant problems, other words the system able compete. Third chapter describes diagnostic system that is
currently used CCPP Vresova. Control systems for particular equipments are summarized, well as
off-line diagnostic methods. The main concern of
this part combustion lignite gas and corresponding operation stages complete
system. Author prospectively advises to
involve prediction system into control system. Next, detection responsive burning hydrogen gas introduced gas
turbine compartment. The same holds for the fuel
nozzles primary manifold. First them is
suggestion diagnostic system for accessory gear including prediction system.
Thesis divided into several chapters.
Second particular issue undertakes CCPP from safety viewpoint.
Introductory chapter familiarizes diagnostics and diagnostic systems
