Petersen Coil Regulators Analysis Using a Real-Time Digital Simulator

Abstract

In order to study new technologies, in sight of smart grids, and for new regulation, protection, and control devices homologation tests, it becomes essential to use a real-time digital simulator (RTDS). This calculator offers the possibility to analyze the behavior of the aforementioned devices in any electrical grid condition, especially those hardly reproducible on the real field. In this paper, the analysis of two types of Petersen Coil Regulators will be discussed, focusing on the experimental results reached, useful to gain an optimized electrical distribution grid management

Ground Fault Temporary Overvoltages in MV Networks: Evaluation and Experimental Tests

“…and healthy phase TOVs to 3 p.u., as shown in [1], [2], and [21]. However, despite the excellent performance of variable Petersen coils, especially when assisted by neutral analyzer devices [13], [15], [20], detuning or loss of neutral compensating devices might bring back the undesired overvoltages in case of 1LG faults [19].…”

“…A well-tuned resonant earthed neutral system is not subject to the previously described phenomena, as shown in [18] [19]; adjustable Petersen coils assisted by neutral analyzer devices [20] have an excellent operational record [11], [14], [15], but maloperation or outage of neutral compensating devices might bring back the undesired TOVs in case of 1LG faults along an MV overhead line [19].…”

Principle and Control Design of Active Ground-Fault Arc Suppression Device for Full Compensation of Ground Current

“…In fact, G ad /(sC o ) in the forward path provides some damping to the harmonics, simple PI plus Resonant controller can achieve good control performance. 2 2 0…”

“…Traditional arc suppression coil (ASC) compensates the capacitive ground current by the principle of parallel resonance [2] [3], encountering limited arc suppression performance as large harmonic contents can also maintain arcs at the ground point [4]. Besides, the possible overvoltage caused by the series resonance between ASC and inherent capacitance at the inception of ground fault may further result in cross-country faults and insulation failure [5]- [8].…”

Faulted feeder identification in active grounded networks

“…The system charging current value should be known for designing the HRG power system. In resonant grounding systems, control and limitation of fault current are provided, if the current of ground fault neutralising coil is equal to the capacitive charging current of the power system [22,23]. In [1,24], a method for determining the system charging current by performing calculations of the inherent capacitance to the ground for each component of the power system has been established.…”