Abstract
The High Resistance Ground was used at the oil and gas platforms because of the main reason of not having the process in the facility interrupted. There are cases where main high voltage contactor has tripped and disabled the process at satellite platforms due to the lightings module grounded. This is unacceptable to the daily production. In this paper it will discuss on the electrical distribution load flow analysis, capacitive charging system for the HRG designs and the single phase to ground fault control which is offered by the HRG systems. In the oil and gas platform, there is always a case where the ground fault occurs and causes disturbance to the process. With the 3 Generators (Solar Centaur 3125 MVA) power for the overall electrical distribution, all the equipment on the buses is prone to the faults. It has always been the challenge to control and eliminate or reduce the ground faults. The determination of the total system charging current (Ic) is important and thus determining the value of resistor that is able to limit the fault to ground. The limit of current is about 5-10A. This investigation also will compare and analyze the line to ground faults. Symmetrical components are usually widely used for the study of fault calculations.
Highlights
The oil and gas offshore platform at Guntong A complex has encountered multiple interruption due to the fault that occurs in the power system
The ground fault that happens in the power systems had caused unnecessary breakdown to the process facility
With the 4160 Vac generated from the gas turbine generator fault occurring at anytime the situation will become worst when having difficulty to detect and locate the fault in the system or equipment.HRG installation was driven by few factors as follows:
Summary
The oil and gas offshore platform at Guntong A complex has encountered multiple interruption due to the fault that occurs in the power system. The offshore oil and gas platform at Guntong A complex is power with generators, electric machines, transformers and others All of this electrical equipment is designed to accommodate all the loads in the facility (Appendix A). Universal Journal of Electrical and Electronic Engineering 6(5A): 42-49, 2019 intermittent ground fault can cause severe failure in an ungrounded system To solve this problem the High Resistance Grounding has been used with the connection of the neutral point with resistance to ground. Some of the study parts will include the load flow analysis (Appendix B), short circuit analysis such as line to ground fault (Appendix C) By analyzing this functionality the fault occurrence in the circuit can be controlled and the high resistance grounding method in the system can be effectively functioning. The working principle of the HRG will discuss in detail about the system capacitive charging current
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