Electromagnetic Interference (EMI) Studies
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Photovoltaic Parks
The integration of DC and AC zones into a single power system may introduce hidden hazards under normal or fault conditions. For example, a ground fault in the AC side of the Photovoltaic park may cause the injection of an enormous current fed by the power network. In this case, the design of an effective grounding system can prevent hazardous touch and step voltages that may appear within the Photovoltaic park. Moreover, Photovoltaic parks can be vulnerable to lightning strikes due to the large areas they occupy and the significant volume of their constituent electrical and electronic equipment. In the absence of an adequate lighting protection system, overvoltages may arise, causing hazardous touch, step voltages or even fire on the photovoltaic equipment.
In addition to safety issues, the DC stray current interference from Photovoltaic parks can generate corrosion issues on third-party infrastructures. Photovoltaic modules and DC cables experiencing a fault or deteriorated insulation are sources of leakage currents circulating through the soil and subsequently may flow along third-party buried metallic structures, causing accelerated corrosion.
Considering the unique characteristics of Photovoltaic parks, specialized assessments should be performed for the design of mitigation measures that eliminate impacts on the asset life, human safety, return of investment and environmental pollution.
At Electrolysis, we specialize in:
Direct Current (DC) Interference studies
Alternating Current (AC) Interference studies
Power Networks
Electromagnetic Interference (EMI) induced by HVAC/HVDC systems (i.e. transmission lines) during both normal operation and fault conditions can generate electric shock hazards and damage the equipment of critical third-party infrastructure in the vicinity. For instance, EMI to a pipeline can result in hazardous potentials on the pipeline's metallic wall. Moreover, EMI may cause excessive stress voltages of the pipeline’s coating, resulting in coating holidays-punctures.
The analysis of EMI on nearby infrastructure is a complex problem, depending on multiple interacting variables. At Electrolysis, detailed modelling and field monitoring are used to assess the interference susceptibility and design appropriate mitigation systems.
At Electrolysis, we specialize in:
Induced AC Interference studies from Power Systems
DC Stray Current Interference studies Power Systems
Electric Traction Systems
Electric traction systems can be a source of interference. When a pipeline is laying in parallel to a railway, the coupling mechanism is primarily inductive. In addition, if the rails of AC powered railways are grounded, leakage/fault currents may conductively interfere with an adjacent buried structure.
Stray current from DC tractions systems is an inevitable consequence of the use of the running rails as the return circuit for the traction supply current. The stray current control design requirement is to minimize the impact of the stray current on the supporting infrastructure and on third-party infrastructure. Acceptable stray current control can be achieved by a set of measures, mostly, at the design phase.
The analysis of interference on nearby infrastructure from electric traction systems is a complex problem, depending on multiple interacting variables. At Electrolysis, detailed modelling and field monitoring are used to assess the interference susceptibility and design appropriate mitigation systems.
At Electrolysis, we specialize in:
Induced AC interference studies from electric traction systems
DC Stray Current interference studies from electric traction systems