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Electrical Protection


Protecting Industrial Control Circuits

Addressing relay challenges with the modern technology BY MARK STEPHENS & ALDEN WRIGHT, Electric Power Research Institute In 2009, the Electric Power Research Institute (EPRI) began an effort to create improved alternating current (AC) “ice cube” relays that could withstand voltage sags...

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Protection

Protecting Wind Turbines from Lightning Strikes and Transient Voltage Spikes

Introduction to Electrical Surges in Wind Turbines

Wind turbines, by their very nature, are situated in exposed locations, making them particularly vulnerable to lightning strikes. These strikes can induce transient voltage spikes within the wind turbine's electrical system, posing a significant threat to critical components like generators, converters, and control systems. Implementing robust surge protection measures is essential to safeguard wind turbines from the damaging effects of lightning strikes and ensure their reliable operation.

The Risks of Lightning and Electrical Surges

Lightning Strike Incidence

Given their height and isolated locations, wind turbines are prone to direct lightning strikes. These strikes can induce high-voltage surges that travel down the turbine structure, threatening the electrical and electronic components within.

Transient Voltage Spikes

Apart from direct strikes, wind turbines can experience transient voltage spikes from nearby lightning activity or grid fluctuations. These spikes can be equally destructive, disrupting the normal operation of turbine control systems and power electronics.

Surge Protection Strategies for Wind Turbines

Surge Protection Devices (SPDs)

SPDs are critical in safeguarding wind turbines from the effects of lightning and electrical surges. They are designed to detect and divert excess voltage away from sensitive components, thereby preventing damage.

Grounding Systems

Effective grounding...

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