Sensoryang Fluxgate sa SST: Presisyon ug Proteksyon

Ano ang SST?

Ang SST o Solid-State Transformer, kasama ang Power Electronic Transformer (PET) sa pagtukoy dili. Gikan sa perspektibo sa pagpadala sa kuryente, ang tipikal nga SST nakakonekta sa 10 kV AC grid sa primary side ug nag-output og humoltong 800 V DC sa secondary side. Ang proseso sa conversion sa kuryente adunay duha ka yugto: AC-to-DC ug DC-to-DC (step-down). Kung ang output gamiton sa individual nga equipment o gitipon sa mga server, kinahanglan og dugang nga yugto aron mobaba gikan sa 800 V hangtod sa 48 V.

Ang mga SST adunay basic nga mga function sa tradisyonal nga transformers apan gibag-oan usab og advanced nga capabilities sama sa reactive power compensation, harmonic mitigation, ug bidirectional power flow control. Ginagamit sila sa high-power applications sama sa renewable energy grid integration, EV charging stations, ug computing centers (e.g., AIDC).

SST: Ang Pinakamaayo nga Solusyon Alang sa High-Power AIDC Era

Ang SST nagsilbi isip third-generation high-voltage DC power distribution solution.

• Ang first-generation HVDC gigikanan pa sa conventional nga power-frequency transformer structure, gi-upgrade lamang ang Uninterruptible Power Supply (UPS) side.

• Ang second-generation solutions, sama sa Panama power supply, ginapalit ang power-frequency transformer ngadto sa phase-shifting transformer, nag-improve sa integration.

• Ang third-generation SST ginapalit ang power-frequency transformer ngadto sa high-frequency transformer, nailhan sa pinakataas nga level sa integration.

Ang core sa SST mahimong makuha sa pag-abandon sa iron-core ug winding structure sa tradisyonal nga transformers, gamiton ang semiconductor devices sama sa IGBTs ug SiC. Ang SST may adunay daghang advantages sama sa:

• Conversion efficiency (end-to-end efficiency improved by over 3 percentage points),

• Construction time (only 30% of traditional UPS solutions),

• Footprint (reduced by more than 50% compared to traditional UPS),

• Renewable energy integration (direct green power supply without additional conversion modules).

Teoretikal, pinaagi sa pagbawas sa bilang sa voltage ug current conversions, ang SST minimizes power transmission losses, eksaktong address ang pain points sa power distribution sa high-power data centers.

Application of High-Precision Fluxgate On-Board Current Sensors in SST

Precise Current Sensing for Power Conversion and Control

Ang AC/DC ug DC/DC converters sa SST depende sa advanced modulation algorithms ug closed-loop control. Ang upper limit sa control accuracy determinado gikan sa sensor precision. Ang near-"absolute truth" current signal provided by fluxgate sensors forms the foundation for accurate controller calculations (e.g., generating compensation signals, computing active and reactive power). Low temperature drift ensures this accuracy is maintained not just under lab conditions, but across the full operating temperature range. As SST power modules generate significant heat during operation, environmental temperatures fluctuate dramatically. The low-drift characteristic ensures consistent control references from startup to full load, preventing efficiency degradation or control instability due to sensor drift.

Accurate Overcurrent and Short-Circuit Protection

Ang power semiconductor devices (e.g., SiC MOSFETs) inside SSTs operate at high switching frequencies but have limited tolerance to overcurrent. Fault currents must be interrupted within microseconds. The fast response of fluxgate sensors acts like a high-speed camera, instantly capturing current spikes, providing critical reaction time for drive and protection circuits to prevent cascading device failures. This not only ensures safety but also enhances system dynamic performance. Rapid current feedback allows the controller to quickly suppress disturbances caused by load transients, maintaining stable bus voltage.

Strong Noise Immunity for Data Accuracy and Reliability

SST itself is a powerful source of high-frequency electromagnetic interference. Traditional current sensors (e.g., Hall-effect sensors) are susceptible to such noise, resulting in signal spikes that can cause control malfunctions or distorted monitoring data. Fluxgate technology, based on magnetic core saturation principles, inherently suppresses out-of-band noise. It can clearly extract the desired fundamental or specific-band current signals from complex electromagnetic environments, providing reliable data for condition monitoring and health management systems.

Additionally, the on-board design of fluxgate sensors allows direct integration onto control PCBs, reducing system volume and optimizing layout. This is ideal for SST’s pursuit of high power density and miniaturization.