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Wind turbine system (WTS) now a day has turned out to be exceptionally useful technique to minimize the centralization of electrical power particularly in provincial territories and rural areas. In any grid connected WTS there are alternatives for receiving reactive power from main grid but if it is islanded or made off grid in that case we need to look for different choices for voltage profile improvement...
In a VSC-HVDC link, a DC fault can lead to destructive overvoltage or overcurrent in DC lines, thus DC protection system plays an essential role for isolating the fault section of the network. This paper presents a combined protection scheme of multi-terminal VSC-HVDC links under DC faults. This scheme uses DC breakers and inductors to limit overcurrent in DC links under DC faults. Simulation results...
In the Guangzhou Pumped Storage Power Station A (GPSPSA), a single-phase disconnection fault of a generator circuit breaker (GCB) caused the preemptive action of a zero sequence overvoltage protection at the low voltage side of the main transformer which expanded the accident scope. To investigate this disconnection fault, a simulation model is built in the PSCAD environment and is verified by the...
With the developing of power system, there many power plant of HUBEI JINGZHOU CHINA with small generation capacity interconnected with weak lines and more and more small capacity interconnected to power grid threaten the stability of power system. The small capacity system is not normally meet local load, and sometimes even larger shortage. Aimed at the different types of HUBEI JINGZHOU CHINA small...
The microgrid concept has the potential to solve major problems arising from large penetration of distributed generation in distribution systems. A microgrid is not a robust system when compared to a power system. Therefore, proper control strategies should be implemented for a successful operation of a microgrid. This paper proposes the use of a coordinated control of reactive sources for the improvement...
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