Safety critical systems often have shutdown mechanisms to bring the system to a safe state in the event of a malfunction. We examine the use of ride-through, a technique to reduce the frequency of safety shutdowns by allowing small transient violations of safety rules. An illustrative example of enforcing a speed limit for an autonomous vehicle shows that using a rate-limited ride-through bound...

In the paper, a novel HVDC transmission system operating with weak ac system has been modeled with speed and precision & analyses the control strategy & performance of system, which is controlled using fuzzy. The system can feed a weak or even dead network under fluctuations and big variations of the input power. The fuzzy logic-based control of the system helps to optimize the efficiency of th...

Abstract: Currently, the electric power production by wind energy conversion systems (WECSs) has increased significantly. Consequently, wind turbine (WT) generators are requested to fulfill the grid code (GC) requirements stated by network operators. In case of grid faults/voltage dips, a mismatch between the generated active power from the wind generator and the active power delivered to the g...

In this paper, the voltage sag ride-through capabilities of the line-connected electrically excited synchronous machine with damper windings (EESM) is investigated. We will design an algorithm for voltage sag ride through by controlling the flux. Two aspects are investigated, first the capability to keep the nominal speed and second the damping of speed oscillations. We will show through simula...

Modular multilevel converter (MMC)-based high voltage direct current (HVDC) transmission networks integrate remotely located distributed renewable energy resources (RER). The intermittent nature of RER and symmetrical asymmetrical AC-side low-voltage faults produce operational difficulties. It reduces the MMC’s ability to transfer rated power, which raises HVDC link. Therefore, MMC-HVDC network...

1 Aditya Prakash Dixit, 2 Bhupendra Paliwal , 3 C.S.Rajeshwari, 4 Anjali Potnis 1 Department of Electrical and Electronics Engineering, NITTTR, Bhopal (MP) India 2 Department of Electrical and Electronics Engineering, NITTTR, Bhopal (MP) India 3 Prof. Department of Electrical and Electronics Engineering, NITTTR, Bhopal (MP) India 4 Asst. Prof. Department of Electrical and Electronics Engineerin...

This article proposes a current limiting method for single-loop voltage-magnitude controlled grid-forming (GFM) converters to avoid overcurrent during symmetrical faults. The proposed consists of two parts, which are the outer power reference adjustment limit steady-state fault current, and transient virtual resistor, implemented by directly modifying modulation voltage reference, fault-incepti...