The influence of photovoltaic (PV) output with stochasticity and uncertainty on the grid-connected system’s voltage stability is worth further exploration. long-term a 3-bus system large-scale PV power station considering adjustment an on-load tap changer (OLTC) was studied. In this typical system, two supercritical Hopf bifurcation (SHB) points are found using calculation. At SHB point that ap...

For several decades, the power system protection relay has experienced many important changes, from purely electromechanical type to the mixture of electronic and electromechanical type, then to fully static, and now fully numerical relays based on microprocessors. In the transformer protection area, similar changes can be seen. It is a dream for protection engineers to have a system that not o...

Nowadays, in low voltage electric distribution networks, the network operators are encountering a high number of connected small-scale distributed generation units, mainly photovoltaic prosumers. The intermittent nature prosumers, together with degree uncertainty requested and injected powers associated all end-users from can cause variations that violate allowable limits. In this context, pape...

Distribution companies are increasingly turning to active network management improve how networks perform with respect different metrics or objectives. This includes Conservation Voltage Reduction (CVR) that seeks minimize energy usage of consumers (mostly connected low voltage, LV, levels) by reducing their supply voltage. However, if medium voltage (MV) levels have be reduced achieve CVR, it ...

Changing dynamics of power systems caused by the migration from conventional to distributed energy sources increase the risk of blackouts due to voltage instability, especially in case of unforeseen network conditions (e.g., (N-k)-cases). To enable a both secure and efficient power supply, novel monitoring and emergency control systems for the identification of voltage emergency situations as w...

The main issues in this dissertation are the behaviour of current limiters protecting synchronous generators, and the interactions that occur with other components in the power system during a voltage instability. The importance of these limiters for the voltage stability is shown both in the analysis of small models and in the simulations of larger networks. Voltage stability of a power system...

Understanding the behavior of network forensic devices is important to support prosecutions of malicious conduct on computer networks as well as legal remedies for false accusations of network management negligence. Individuals who seek to establish the credibility of network forensic data must speak competently about how the data was gathered and the potential for data loss. Unfortunately, man...