High Voltage Ride Through

Even temporary overvoltage in electricity grids cause thousands of wind turbines to stop and lose production. Mita-Teknik now offers a cost-effective HVRT solution that keeps safe turbine operation when the grid voltage exceeds.

The High Voltage Ride Through (HVRT) handles the grid faults, which are related to a voltage rise. The HVRT functionality is applied to each of the three voltage phases. The functionality is activated when the voltage rise higher than the voltage level defined by the local utility company and can be adjusted by parameters.

Wind turbines regularly trip because of temporary overvoltage in countries where grids are unstable from time to time. That is why the Chinese authorities now require all wind turbines to install a High Voltage Ride Through (HVRT) solution to keep the wind turbines in operation and keep the grid stable. The Mita HVRT system allows wind turbines to keep producing even when the voltage rises.

Certified for China

Mita-Teknik offers the “missing link”: a low-cost technical HVRT hardware and software solution. It is fully compliant with the national standard of the People’s Republic of China.
 
Mita-Teknik has more than 35 years of experience in wind power electronics and has successfully delivered systems in the areas of control, regulation and surveillance for more than 50,000 wind turbines worldwide.

When temporary overvoltage occurs, the Mita HVRT system will protect the wind turbine and ensure optimal turbine operation. Consequently, the temporary overvoltage will be invisible to the wind turbine; it will merely continue to run.

HVRT - Protect Your Asset

The Mita HVRT system enhances profitability for wind turbine owners. Because wind turbines have multiple complicated systems that need to be safely re-started, it can take up to 20 minutes to fully restart a large wind turbine. With the wind blowing strongly, substantial energy can be lost that way. The Mita HVRT solution prevents wind turbines from automatically shutting down in case of high voltage fault and is protecting the wind turbine and its components.

The advantages of the Mita HVRT solution are:

  • Increased uptime, and thus increased production from wind turbines
  • Low-cost, simple, and reliable
  • Can easily be installed in existing wind turbines
  • Meets the requirements of Chinese authorities
  • Allows existing wind turbines to continue operation for years to come

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