Analysis of protection scheme settings applied for shunt capacitor banks in 23 kV electrical substations

• Published in: 2023 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC) Vol. 7; pp. 1 - 7
• Main Authors: Castellanos, Ivan R., Sebastian Baltazar, David
• Format: Conference Proceeding
• Language: English
• Published: IEEE 18-10-2023
• Subjects: Capacitors; internal or external faults in capacitive banks; Power electronics; protection of capacitive banks; reactive compensation; Sensitivity; shunt capacitor bank; Shunts (electrical); Software; Substations; Voltage; voltage recovery transient
• ISSN: 2573-0770
• DOI: 10.1109/ROPEC58757.2023.10409361

This paper shows the settings and evaluation of three protection schemes with three different shunt capacitor bank configurations, also units with external fuses and fuseless. Internal and external faults on shunt capacitor banks (SCB) was taken to evaluate and software PSCAD/EMTDC was used to simulate this. The test systems on this paper are two substations on Mexico electrical system on 23 kV with presence of shunt capacitor banks, called SE Moctezuma and SE Tuzania. The results show critical conditions where protection schemes operate properly. Nevertheless, some scenarios evidence a null operation of protection schemes even with several units or elements faulted. Finally, the evaluation on these schemes demonstrates that methods with voltage operating principle require a less sensitivity than schemes witch current operating principle