Examples of changes in Romania power systems towards the achievement of the modern objective of the UE

One of the main scopes for power systems is the ensuring adequate and secure electricity service through intelligent planning, operation and reliability. In order to benefit today from the advantages of the intelligent production of tomorrow, the connection between the real production and the processes based on digital data is necessary. The devices using power electronic technology become a vital solution in many power system applications. Nowadays technologies are generating solutions various increasingly for the energetically management.

Recent Challenges in Electrical Engineering and the Solution with IT

Electrical engineering is a broad field right from Electrical Power Generation to Distribution to end users. With deep penetration of Power Electronic Devices (PED) into electrical system, it has become complex to understand and control, but has given many advantages. Computer engineering is also an integrated branch of several fields of engineering like electrical and computers, which focuses on programming, and integration with hardware devices. Electrical engineering is always a challenging field which requires a regular up keeping with proper control and communication system. This paper aims to review the existing electrical power system, various challenges like increased demand, cyber attacks, power electronic technology trends, the opportunities emerged and the action plan to mitigate them with the use of Information Technology(IT) for a sustainable development

The OPF Formulation and Solution for Energy Router Incorporated AC&DC Network

Background: The energy router based on power electronic technology is the core equipment of energy internet. Energy router can control the voltage of the port and regulate the power injected into the network flexibly. It is of great significance to study how the capability of the energy router can be used to improve characteristics of the power system. Methods: Based on the analysis of energy router, we construct a unified AC-DC power flow model for energy router considering its different control modes. Then, we establish an optimal power flow formulation for the energy router incorporated AC-DC network and propose the multi-objective function to optimize the comprehensive performance of the network. Several cases are observed and analyzed on a modified IEEE-57 system. Results: The result verifies that the optimal power flow formulation can optimize the control values of ports of the energy router and improve the operating state of the power system. The optimal target presented in this paper can improve the characteristics of the grid better than a single optimal target. Conclusion: Energy router will play a vital role in the energy internet based on the power system. The characters of the power system can be improved and the operating costs can be reduced by utilizing the functionality of energy router in regulating power flow.

Speed Control of PMSM Drive fed with Nine Level Inverter

Power electronic technology made possible to evolve inverter fed electric drives. Permanent magnet synchronous motors (PMSM) are in much importance and are used often due to its performance characteristics. PMSM gives less noisy operation with faster and more efficient operation. PMSM needs a digital inverter for its operation. The paper analyzes nine-level inverter fed PMSM drive. Multi-carrier level-shifted technique is used to generate control pulses. Simulation work of the proposed concept is carried out and the results are presented using MATLAB/SIMULINK software.

PV with Boost Converter Integrated Three-Level Inverter Fed PMSM Drive for Agricultural Application

Apprehension of inverter fed electric motors is made possible with the trends in power electronic technology. Permanent magnet synchronous motor (PMSM) is one motor replaced conventional electric motors with attractive features like compactness, lightweight and efficiency. This paper presents a PV (Photo-voltaic) fed PMSM drive system for water pumping application. Photo-voltaic system is one among the renewable sources available free from atmosphere which can generate electricity with ease. Output of PV is fed to a boost converter to generate required level of voltage to PMSM. Boost output is fed to a driving inverter to PMSM. Closed-loop boost converter feeding PMSM drive is analyzed. PMSM drive is a closed-loop system design to run at commanded speed. PV fed PMSM drive is validated with fixed speed and variable speed conditions.