Our 4 Basic Principles explained in 4 weeks #3

HITEC Power Protection has developed a distinctive approach to guaranteeing uninterrupted, seamless and clean power, which is built upon 4 fundamental principles. These principles collectively provide unparalleled benefits when compared to traditional battery-based static UPS systems Each week we will explain 1 of our 4 principles. This week: Active Power Filtration.

3rd Principle: Active Power Filtration

In the present era of rapid developments, a reliable and clean power supply is vital for the efficient operation of various electrical systems. A dynamic UPS system offers a solution that not only ensures a stable power supply but also acts as an active filter to eliminate harmonics and maintain a near-unity power factor. In this blog post, we will delve into the inner workings of a dynamic UPS system and explore its outstanding qualities as an active filter.

The Role of Reactor and Synchronous Generator
At the heart of a dynamic UPS system lies the ingenious combination of a reactor (choke) and synchronous generator. Together, they function as a powerful filter that cleanses the incoming utility supply. By carefully adjusting the position of the tap on the reactor, the equivalent circuit impedances of the generator and the reactor create a zero impedance path (X”d + Xc = 0). This configuration effectively eliminates the need for power electronics to generate, condition, or convert the output voltage, thereby preventing the production of harmonics typically associated with battery UPS systems.

Harmonic Filtering
One of the key advantages of a dynamic UPS system is its ability to act as a harmonic filter, both supplying and removing load-borne harmonics. Unlike traditional UPS systems that introduce harmonics, this system actively filters out these unwanted distortions from the power supply. This ensures a cleaner and more reliable power source for sensitive equipment and reduces the risk of disruptions caused by harmonics.

Reactive Power Supply and Power Factor Correction
In addition to its harmonic filtering capabilities, the synchronous generator within a dynamic UPS system also supplies the necessary reactive power drawn by the load. This feature ensures a power factor that is consistently close to unity, regardless of the load profile. By providing reactive power, the system improves the overall efficiency and performance of electrical systems, resulting in optimal power utilization.

Qualities of an Active Filter:
• High short-circuit output capacity: a dynamic UPS system boasts a robust short-circuit output capacity, eliminating the need to switch to a bypass mode (utility) in the event of an output fault. This capability enhances system reliability and minimizes downtime.
• Protection against voltage dips and spikes: The UPS system effectively blocks voltage dips and spikes in the utility supply, safeguarding sensitive equipment from potential damage and ensuring uninterrupted operation.
• Compensation for prolonged voltage deviations: The system compensates for prolonged deviations in the utility voltage, guaranteeing a stable and consistent power supply even under challenging conditions.
• Filtering of utility-borne harmonic voltages: The active filter actively filters out harmonic voltages present in the utility supply, further enhancing the quality and cleanliness of the power delivered to connected equipment.
• Filtering of load-side-borne harmonic currents: The UPS system also filters out harmonic currents generated by the connected load, preventing their propagation throughout the electrical system and minimizing their detrimental effects.

Conclusion
A dynamic UPS system represents a significant advancement in power supply technology. By leveraging the combination of a reactor and synchronous generator, it acts as a powerful harmonic filter, supplying clean power while maintaining a near-unity power factor. With its qualities such as high short-circuit output capacity, voltage protection, and harmonic filtering, this UPS system is ensuring reliable and efficient power for critical applications.

Next week Principle 4: Battery-free Solution