THD reduction of PCC voltage by using bridge-type fault current limiter

Abstract

There are various types of fault current limiters (FCLs), which are made of different superconducting materials and have different designs. The bridge-type FCL is mainly composed of a diode bridge rectifier and a DC reactor. This FCL can control the fault current by controlling the DC reactor current. To enhance this capability, a resistor parallel with a semiconductor switch has been used in series with DC reactor. In this article, hysteresis technique has been proposed and integrated in this structure, which not only limit the fault current but also reduce total harmonic distortion (THD) at the point of common coupling (PCC). Therefore, the performance of all loads connected to PCC will not be affected during fault. The theory and properties of the proposed bridge-type FCL for limiting the fault current and producing sinusoidal voltage at PCC during fault has been presented, and its model has been simulated by power systems CAD/electromagnetic transients including DC. It is shown that the proposed FCL can effectively reduce the THD at PCC and limit the fault current.

Analysis of the effect of location and failure rates of fault current limiters on substations reliability

“…If λ B Fault current is the failure rate that occurs because of fault current passing through B, then reduction of fault current results in a decrease in the B's failure rate, because the λ B Fault current is removed. 21,27,[29][30][31] If λ i is the failure rate of the ith component shown by Equation 10, then α i . λ i is the failure rate of that component after reducing fault current.…”

“…In other studies, 3,5,7 FCLs using a magnetic saturation property have been presented. The capacitive and inductive resonance limiters in Naderi et al 1 and Xiaoqing et al 4 and solid state FCLs in numerous studies [8][9][10][11][12][13] have been investigated. In a number of studies, [14][15][16] FCLs are studied on the basis of superconductor property.…”

“…2,3 However, FCLs can have negative or positive effects on the system. In Firouzi et al, 10 the effect of the bridge-type FCL on the reduction of total harmonic distortion is studied. In other studies, 11,19,25 the effects of using an FCL over network protection have been investigated while in Didier et al, 26 the effects of FCL and its impedance type on increasing stability have been explained.…”

Improvement of Power System Stability by Using New Switching Technique in Bridge-type Fault Current Limiter

“…SFCLs offer a solution to these problems with many significant advantages. Figure 1 shows favorable SFCL placements in a power system, and the technical and economic benefits are summarized in Table 1 [6][7][8][9].…”

Investigation of the performance of distance relay in the presence of saturated iron core SFCL and diode bridge type SFCL

“…BSFCL also has the merits which introduce it as the appropriate candidate for fault current limitation concepts. Fast reaction, the significant elimination of DC offset from fault current, and the effective limitation of fault current in faulty phase during single phase to ground fault in case of implementation of three‐phase configuration are some of the benefits offered by this type of SFCL …”