Soil and groundwater pollution control ranks high in China’s ecological environmental protection agenda. Remediation of heavy‑metal contamination, organic pollutants and pesticide residues constitutes core tasks in ecological restoration. High‑voltage power supplies serve as key power components for soil and groundwater remediation equipment, delivering high‑energy high‑voltage output to plasma degradation devices, electro‑dialysis systems, electrochemical oxidation units, groundwater ozone injection modules and microwave remediation machinery. They enable pollutant decomposition, heavy‑metal migration, soil sterilization and groundwater purification. Their energy output capability, environmental adaptability, long‑term reliability and field suitability directly govern remediation efficiency, treatment effectiveness and compliance achievement at contaminated sites. Soil and groundwater remediation impose eight extreme technical challenges on high‑voltage power supplies. 1.High‑energy pulsed output capability. Plasma degradation, electrochemical oxidation and electro‑dialysis require powerful high‑voltage pulses to decompose organics and drive heavy‑metal migration. Power supplies must generate peak pulses from 10 kV to 100 kV with single‑pulse energy above 1,000 J, pulse width continuously adjustable from 1 μs to 1,000 μs and repetition frequency ranging 0.1 Hz–10 kHz. Dual DC/pulse mode supports diversified remediation technologies and pollution categories. 2.Extreme field environmental adaptability. Remediation sites are mostly open rural areas exposed to −30 ℃–+60 ℃ temperatures, humidity over 90 % RH, rain immersion, heavy dust, mechanical vibration and unstable power. Some remote locations rely solely on generators or solar energy. Equipment must start and operate at full power across the full temperature range, achieve IP67 protection against water, dust and flooding, and withstand 30 g impact plus 10 g random vibration during transportation and on‑site operation. 3.Wide compatibility with diverse power sources. Field power quality is poor with severe voltage fluctuation and harmonic distortion; many sites lack mains electricity and depend on diesel generators, solar arrays or battery packs. Input coverage spans 85 VAC–265 VAC, tolerates generator frequency variation 45 Hz–65 Hz and supports DC 24 V/48 V/220 V inputs for renewable power. Stable performance is guaranteed even under fluctuating generator output. 4.Long continuous operation and maintenance‑free reliability. Remediation projects last months or years with 24/7 continuous operation and minimal on‑site technical support. Required MTBF ≥5×10⁴ hours and design life ≥10 years. Embedded self‑diagnosis and automatic fault recovery enable unattended long‑term field deployment with full‑lifecycle maintenance exemption. 5.Extreme load adaptability for complex media. Soil moisture, porosity, conductivity and pollutant composition vary drastically across sites, causing load impedance fluctuation across multiple orders of magnitude during treatment. Power supplies must stably drive loads from 10 Ω to 100 MΩ with real‑time adaptive parameter tuning to maintain uniform remediation effectiveness despite dynamic medium changes. 6.Intrinsic safety and explosion‑proof design. Degradation of organic contaminants produces flammable gases such as methane and hydrogen; typical sites include abandoned chemical plants, pesticide factories and gas stations with volatile combustible vapors. Equipment complies with GB 3836 explosion‑proof standards with intrinsically safe or flameproof construction. Comprehensive overvoltage, overcurrent, short‑circuit and arcing protection eliminates ignition risks from high‑voltage spark discharge. 7.Intelligent control and closed‑loop remediation management. Real‑time adjustment based on pollutant concentration, soil moisture and conductivity requires remote monitoring capabilities. Integrated 4G/5G, LoRa and Ethernet communication enables seamless connection with cloud remediation platforms, supporting remote parameter tuning, real‑time operational logging and automatic closed‑loop optimization linked with online pollutant sensors. 8.Modular portable architecture for decentralized sites. Frequent transportation, assembly and capacity expansion demand lightweight modular design. Single modules weigh ≤30 kg for manual carrying with fast plug‑and‑play interfaces supporting parallel stacking to scale power for small‑to‑large remediation projects. This methodology establishes a complete technical framework covering high‑energy pulsed topology, extreme field hardening, ultra‑wide load adaptation and explosion‑proof safety engineering. It standardizes high‑voltage power design for plasma soil treatment, electro‑dialysis, electrochemical oxidation and groundwater ozone purification, advancing domestic core component localization in ecological restoration equipment. Addressing high‑energy demand, harsh field conditions, extreme load variation and explosion hazards, the universal design adopts Marx pulse discharge topology combined with full‑bridge LLC resonant charging and fully sealed ruggedized integration, overcoming traditional weaknesses in environmental resilience, load compatibility and field applicability through eight core principles: 1.High‑energy pulsed topology optimized with Marx architecture plus LLC resonant charging to deliver >1,000 J pulse energy and fully adjustable output parameters. 2.Full environmental hardening ensuring wide‑temperature resilience, IP67 sealing and vibration resistance for open‑air field deployment. 3.Multi‑source power compatibility supporting wide AC input, generator frequency tolerance and solar/battery DC feeding. 4.Adaptive wide‑load control algorithm stabilizing performance across extreme impedance ranges in complex soil media. 5.Long‑term reliability through aggressive component derating, redundant circuits and autonomous fault recovery for maintenance‑free multi‑year operation. 6.GB 3836 compliant explosion‑proof construction with non‑bypassable multi‑level safety protection against ignition risks. 7.Lightweight modular design with parallel expandability and rapid on‑site assembly. 8.Cloud‑linked intelligent closed‑loop control enabling remote monitoring, data traceability and automatic remediation optimization.
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