Core Insights - The application of high-voltage direct current (HVDC) distribution technology is expected to significantly reduce energy consumption and improve power density in data centers, positioning HVDC as the future direction for AIDC power supply [1][3] - The global SST market is projected to exceed 100 billion by 2030, with SST expected to become the mainstream solution for AIDC external power supplies by 2029-2030 [1][3] Group 1: Domestic Market Insights - Domestic data center external DC power applications have advanced earlier, with two main technology routes: 240/336V modular HVDC power and Panama power, the latter showing high integration and efficiency up to 97.5% [2] - The domestic HVDC market is expected to exceed 80 billion by 2030, with a compound annual growth rate (CAGR) of approximately 122% from 2025 to 2030 [2] Group 2: International Market Dynamics - The core driver for overseas AIDC high-voltage direct current is the requirement for 800V DC power supply for the next-generation NV Rubin GPU, with significant penetration expected by 2027 [3] - The overseas HVDC market is projected to exceed 140 billion by 2030, with a CAGR of about 170% from 2025 to 2030 [3] Group 3: Technological Advancements - SST technology eliminates the need for frequency transformers, leading to significant improvements in size and efficiency, with domestic progress outpacing global developments [3][4] - International Tier 1 companies are actively seeking partnerships with domestic firms to develop HVDC power and SST solutions, indicating strong growth potential in the North American market [4] Group 4: Investment Recommendations - Key recommendations for comprehensive external power suppliers (SST + HVDC) include companies like Sungrow Power Supply and Jinpan Technology, while specific HVDC power recommendations include Zhongheng Electric and Keda Technology [5] - SST-focused recommendations include companies like Sifang Co. and China West Electric, with attention to core component manufacturers [5]

Core Insights - The article discusses the evolution of power supply architectures in data centers, highlighting the shift towards more efficient technologies such as 800V HVDC and SST, with expectations for significant adoption by 2028 and 2030 respectively [2][4][11]. Group 1: Power Supply Architecture Evolution - The current power supply in data centers is primarily centralized (Powershelf), but with the rise of AI workloads, a transition to Sidecar power supply mode is anticipated around 2026-2027, with single cabinet power reaching 250-1500 kW [2][4]. - By 2030, the market is expected to gradually adopt SST power supply architecture, which is projected to achieve a full-link efficiency of 91.2%, surpassing the current UPS architecture efficiency of 85.8% [6][11]. Group 2: 800V HVDC Technology - 800V HVDC is gaining attention for its efficiency and space-saving benefits, potentially increasing end-to-end efficiency to 95-98% compared to traditional UPS systems, while reducing copper usage by 45% and floor space by 40% [11][12]. - Despite its advantages, 800V HVDC faces challenges such as higher initial costs (20-30% more than traditional UPS) and unclear market standards, necessitating industry-wide collaboration for its advancement [11][12]. Group 3: New UPS Technologies - A new type of simplified UPS has been introduced, eliminating the traditional AC/DC rectification stage, which allows for 0ms switching and improved IT performance [15][16]. - This new UPS operates in three modes: normal operation, energy storage during power outages, and combined power supply when load exceeds UPS limits [15][16]. Group 4: Power Supply Technology Upgrades - Upgrades in power supply technology focus on new materials, topologies, and functionalities, with significant advancements in power devices such as SiC MOSFETs replacing Si IGBTs [18][22]. - The integration of passive components like capacitors and inductors is seen as a bottleneck for future integrated power solutions, with expectations for higher integration levels in the coming years [22][24]. Group 5: Addressing GPU Load Fluctuations - The article highlights the challenges posed by GPU load fluctuations in data centers, which can cause significant power quality issues [24][26]. - Solutions for mitigating these fluctuations include using supercapacitors on the DC side and enhancing power supply unit (PSU) designs to accommodate larger capacitors for better load smoothing [26][30]. Group 6: FIVR Technology - FIVR (Fully Integrated Voltage Regulator) is emerging as a promising technology for DC-DC terminal power supply, offering significant improvements in size, thickness, and dynamic response compared to traditional power supplies [33][34]. - This technology integrates power supply directly into the chip, reducing component count and achieving faster response times, although it imposes stringent requirements on inductor size and performance [33][34].