The paper presents a comparison of the performance of voltage-switching devices and voltage-limiting devices for late seventies-vintage SPDs as marketed and installed in service panels in the USA and in Europe. Artifacts in the response of a typical oscilloscope to a nearby gap sparkover, and the effect of lead dress inside the panels and outdoor installation are described. Predictably, the per...

Overvoltage is becoming increasingly prevalent in distribution networks with high penetration of renewable distributed energy sources (DERs). Local control converter-based resources a flexible and scalable method to prevent this growing issue. Reactive power used for voltage many local schemes. However, the typical range R/X ratios lines indicates that mitigation overvoltage often requires exce...

The increasing usage of hybrid cable-overhead lines raises concerns over the protection short cable sections against lightning surges, because voltage build-up in section. To set a simulation model phenomenon is time consuming, with numerous parameters impacting overvoltage. This paper (Part I) presents formulas able to perform fast estimation maximum overvoltage at line transition point event ...

The roof arrester of electric multiple units (EMU) can efficiently limit the overvoltage, and ensure safe operation EMU electrical equipment. In process high-speed operation, traction power supply system is often affected by overvoltage. addition, explosion accidents occasionally occur. this paper, on-line voltage measurement developed. By analysing a large number waveforms, abnormal divided in...

The accurate identification of Very Fast Transient Overvoltage (VFTO) is the key overvoltage control in modern smart grids. In order to accurately identify VFTO generated by operation a disconnector Gas Insulated Substation (GIS), method based on Wavelet Transform (WT) and Singular Value Decomposition (SVD) proposed. simulation model established ATP-EMTP software first, then wavelet decompositi...

In this paper, droop control of inverters in a multi-terminal HVDC (MTDC) system is designed to achieve minimum DC system loss while preventing converter overvoltage. Circuit analysis along with optimization analysis is first conducted to seek the optimal droop control gains. Contingent operating conditions are then considered. The droop control gains will adapt to achieve minimum loss as well ...