Andrew Kasembe

Synchronous phasors monitoring system application possibilities

The paper deals with some tasks of advanced methods to achieve security and reliability of transmission power systems. There are discussed advanced principles and techniques in monitoring systems. The paper main part is devoted to possible applications of PMUs (Phasor Measurement Unit) and their integration into WAMPaC systems (Wide Area Monitoring, Protection and Control). Significant transmission system states were analyzed in several case studies. PMUs utilization for voltage monitoring is demonstrated for three cases - standard system state, high-load state and islanding. Here the attention is paid to the possibilities of power system observability improvement using measuring chain error elimination. Other possible applications in transmission systems include ampacity determination of transmission corridors, the calculation of line electrical parameters using synchrophasor measurement, state estimation issues and power system stability. The power system model was established for methods and algorithms verification purposes. The appropriate algorithms and their parameters were found using simulation outputs to create the local automatics, e.g. Automatic Power System Stabilizer (PSS).

Frequency stability of the future continental Europe power system

This paper deals with dynamic simulation focused on frequency stability of the future European power system.

The reliability of the system with wind power generation

Electricity supply is a fundamental need of a modern society. A crucial property of electricity supply - reliability, is achieved by keeping a power system in a secure state most of the time. A secure state means that the risk of a disturbance to spread further and endanger the system integrity, resulting into supply interruption, is minimal. Large wind power integration can also lead to problems on the voltage control and power quality at large. Voltage control when wind turbines are used can usually be achieved by changing the amount of reactive power compensation (by shunt capacitors installation). The lack of control on the active and reactive powers can disturb the voltage on the Point of Common Coupling (PCC).

From the past to the future of the Czech, Slovak and Central european power systems

The electrification in the Czech (CR) and Slovak Republics (SR) started in 1920 and was coordinated on the common conceptual state basics till the 1992. From the year 1993 (the splitting former Czechoslovakia to CR and SR) the evolutions of the power systems in both countries have been similar, but partly different. The cooperation power systems in Europe was based on interconnection of the power systems to bigger and huge systems, but the process was also restricted by political splitting in the Europe. The next development of power systems is significantly influenced by new environmental targets.