2020年10月2日 · The grounding grid should cover as much ground as possible in the substation, including an area outside the fence. The conductors will be laid in parallel, trying to maintain a uniform spacing along the rows of equipment and structures in the substation.

2017年11月9日 · Grounding Basics. Substation Grounding Tutorial • Definitions per IEEE 80 & 81 • GPR, mesh / step / touch • Current split

Ground potential rise (GPR): The maximum electrical potential that a substation grounding grid may attain relative to a distant grounding point assumed to be at the potential of remote earth. This voltage, GPR, is equal to the maximum grid current times the grid resistance.

2024年11月22日 · The grounding system includes all of the interconnected grounding facilities in the substation area, including the ground grid, overhead ground wires, neutral conductors, underground cables, foundations, deep well, etc. The ground grid consists of horizontal interconnected bare conductors (mat) and ground rods.

2020年10月9日 · High currents through the substation grid produce potential gradients on the Earth’s surface that may endanger the lives of people and animals nearby. A grounding grid must control the potential gradients and create adequate ground resistance. The ground potential rise (GPR) is the maximum electric potential that a grounding electrode may reach.

2024年8月24日 · Substation earthing, or grounding, is essential for electrical safety and reliability in substations, which are critical nodes in the power distribution network. Proper earthing ensures safe dissipation of fault currents into the ground, preventing dangerous voltage build-ups that could cause electrical shocks.

2021年11月3日 · The grounding grid is placed underneath the entire electrical substation which has a dual purpose: operating grounding, carrying faulty currents into the earth without affecting the operation of any protective equipment, and safety for personnel in the vicinity assuring that they are not exposed to an electric shock which could result from the ...

When designing an efficient grounding system for a substation, there are numerous important considerations to take into account: Grounding Grid Design:

2023年1月17日 · Grounding at power substations is extremely important. The grounding system provides the ground connection for the grounded neutral for transformers, reactors, and capacitors and also the discharge path for lightning rods, arresters, gaps, and similar devices.

To provide earth connections to structures and other non-current carrying metallic objects in the sub-station (equipment earthing). In addition to such a grid below ground level, earthing spikes (electrodes) are driven into the ground. They are connected electrically to the earth grid, equipment bodies, structures, neutrals, etc.