The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper analyzes a new architecture of the AC/DC type power supply for data centers. The source cumulates the following functions: three-phase current rectification, transformation of voltage parameters and DC voltage stabilization. The source ensures the reactive power compensation and does not distort the currents in the power three-phase network. The transfer of power from the alternating current...
The paper presented the algorithm for elaboration of the phenomenological model of the generation source, which includes both the technical and financial indices of operation, as well as the costs to the primary energy resources used in the production of energy. They were obtained relations describing the active generation power and the power consumption of the source according to the thermal power...
A centralized system for thermal energy supply in Chisinau (CSTES) comprises thermal energy sources, namely two Combined Heat and Power stations (CHP) — Source1 and Source2 and two Heating Plants (HP West and HP South). Thermal energy transport and distribution from the above mentioned sources is provided through the appropriate loops by means of thermal thoroughfare network, distribution and in-house...
The proposed and argued concept for realization includes the possibility of realizing an average of the medium voltage transformer, for example, with 10 / 0.22 kV parameters. Equipment with these parameters is known as Solid State Transformer (SST), which provides direct connection of consumers to the medium voltage power supply. The output frequency of these transformers is equal to the industrial...
Energy security is the main goal of almost all of documents in the energy sector. The monitoring 46 indicators of energy security is based on the annually replenished database to calculate indicators. Fuel consumption indicators are grouped in the separate block. Forecasting is based on values of fuels consumption for time series and used extrapolation growth factors CAGR. Pollutant emissions are...
A new architecture of a microinverter for the direct junction of photovoltaic modules to the electric network at industrial frequency has been presented in the paper. The conversion of the energy generated by the photovoltaic module into the alternating current is performed in a single stage. It has been achieved the yield of the microinverter equal to 97%, which was experimentally determined. The...
This paper presents short review of both conventional and non-conventional methods of synchronized space-vector pulsewidth modulation (PWM) for three-level and multilevel inverters and ac drives. Accent has been done on overview of specialized techniques and algorithms of space-vector modulation, allowing continuous voltage waveform symmetries of multilevel systems in the whole control range for any...
Split-phase (dual three-phase or six-phase) drive systems are an interesting alternative of existing standard solutions. This paper describes operation of four-inverter-based six-phase system with special scheme of control and modulation, providing mutual compensation of common-mode voltages of dual inverters and continuous synchronization of the phase voltages. MATLAB-based simulations illustrate...
This paper presents results of dissemination of specific schemes of synchronized pulsewidth modulation (PWM) for adjustment of four neutral-point-clamped (NPC) inverters of dual three-phase system. Specifically, this drive includes openend windings induction motor with two sets of windings spatially shifted by 30 el. degrees. Schemes and techniques of synchronized PWM allow continuous phase voltage...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.