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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...
This paper presents a simplified photovoltaic array model to describe the photovoltaic system features under partially shaded conditions. Based on the proposed model, the peak power sliding phenomenon of photovoltaic generation is studied during the above mentioned system dynamic process. The paper analyzes the mechanism of the peak power sliding and the critical sliding conditions. Simulation cases...
This paper presents the interactions among induction motors after voltage sags in power systems, which is useful for industrial customers to arrange intelligent protection of multiple motors to reduce unnecessary stalling. When voltage sags are cleared in power systems, not all induction motors will reaccelerate successfully. The final state of an induction motor depends not only on its own state...
The advantages of low-voltage direct current (LVDC) distribution power systems are emerging with the proliferation of distributed generators and power electronic devices. In comparison with the existing LVDC application in telecommunication, vehicle, ship and traction systems, LVDC distribution power systems concern more protection for safety, especially protection against electric shock caused by...
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