Solid-State Transformer
A medium-voltage to DC conversion platform for AI data centres, EV charging, renewable integration and smart grids. Medium-voltage AC in, 800 VDC out, through one controllable power interface.
Discuss an SST project →四个功率等级，两个已发布 —— 其中一个从 2023 年就在运行。
Ratings are released separately. A released rating means the design is frozen at the stated revision and can be quoted for a project — it does not by itself imply certification, which is tracked separately on the Quality page.
13.8 kV · 3.5 MW
Rev. A7 product, 800 VDC output. The rating with a full published parameter set.
10 kV · 2.5 MW
本等级首次落地：三台 10 kV / 2.42 MVA / 800 VDC 的 AIDC 机组，自 2023 年 9 月投运，至今仍在运行。
10 kV · 1 MW
Planned for a future release. Parameters are not frozen and are not quoted.
34.5 / 35 kV · 10 MW
Planned timing, subject to product plan. Not a contractual delivery commitment.
不是实验室样机。既有在运机组，也有在建订单。
我方产品线背后的 SST 平台自 2017 年起已走过数代现场应用。对今天评估它的买家来说，有三个落地最关键：数台已连续运行数年的机组、一笔正在交付的出口订单，和一次证明直流输出等级在机房之外同样成立的并网。
3 × 10 kV / 2.42 MVA / 800 VDC
三台商用 AIDC 机组，2023 年 9 月在一座数据中心园区投运，此后持续运行。据我们所知，这属于 AI 数据中心里最早的一批商用固态变压器投运，并且至今仍在运行。
4 × 13.8 kV / 800 VDC
2026 年，一家海外 AI 算力开发方为其自有园区订购四台 13.8 kV 机组。这是该平台的首笔出口订单，目前正在生产与交付中。
10 kV / 2 MVA / 750 V
另有 750 V 系列，在一座光储充一体化园区并网运行。它不是 AI 数据中心项目，我们如实列示：这证明同一套变换平台在机房之外同样可以并网运行。
这份记录意味着什么，不意味着什么
这些是真实机组、真实订单和真实供应链，不是实验室样机。但它也不是批量生产。平台处于示范与小批量商用阶段：单台成本仍然偏高，云厂商尚未把它纳入批量采购，产业化仍在早期。这句话我们宁愿现在自己说，而不是让客户以后才发现。
四种状态分开写。一家公司对全部负责。
可报价、已投运、交付中、已做型式试验是四件不同的事，而供应商常常有意把水搅浑。下面逐项说明，以及本平台真正处在哪一步。
| 状态 | 含义 | 本平台所处位置 |
|---|---|---|
| 可报价 | 设计冻结在标注的修订版。可以报价、签约、交付。 | 13.8 kV / 3.5 MW（Rev. A7）· 10 kV / 2.5 MW |
| 已投运 | 在客户现场带电并带负荷运行。 | 自 2023 年 9 月起 3 台在运 —— 10 kV 等级，数据中心 |
| 交付中 | 已下单、在生产、准备发往现场。 | 四台 13.8 kV 机组，2026 年出口订单 |
| 已型式试验 | 按目标市场适用标准取得的第三方证书。 | 尚未 —— IEC 62477-1 仍在推进 |
一个配置可以既已报价、已投运，又尚未做型式试验。我们不会让第二件事盖住第三件事 —— 质量页逐项跟踪认证状态，并列明每项现有证据。
一份合同、一份保修、一位具名工程师。应用研究、单线图与保护定值。市场准入文件、调试、远程诊断，以及本地备件。接口上出了问题，只需要打一个电话。
2017 年以来的生产历史。中压制造与试验设施。SiC 器件与高频磁件。在数据中心与园区的多代现场应用。型式试验记录可对合格买家在保密协议下提供。
平台能力与某一具体配置的认证状态是两份不同的证据，我们也是这样对待它们的。
四个应用场景，一个电能接口。
同一条变换链路，四种配法。变的是端口数量和控制方式。
10–35 kV 进 · 800 VDC 出
机柜级或列级配电。省掉低压开关柜与 UPS，直流母线直接给机柜供电。
10–35 kV 进 · 800–1000 VDC 出
兆瓦级充电不需要单独的变电站建筑。V2G 与光储在同一根直流母线上集成。
光伏与储能共用直流母线
大型光伏与储能在中压侧通过一级变换接入，而不是两级。
构网与穿越能力
中压交流与直流网络之间可控、双向的接口 —— 包含弱电网与微电网运行。
Cascaded AFE, isolated high-frequency DC/DC, parallel DC output.
Medium-voltage AC is actively rectified in a cascaded arrangement, buffered per module, then isolated and converted at high frequency before the parallel low-voltage output stage. Control targets are regulated input current, stable output voltage, module voltage balance, and coordinated protection and bypass.
Simplified for clarity, based on the Rev. A7 block diagram. Topology, switching frequency and control parameters depend on the project and the product revision.
13.8 kV / 3.5 MW, Rev. A7
| Rated power / voltage / current | 3.5 MW / 800 V / 4375 A |
| Steady-state accuracy / transient deviation | ±1% / ±5% |
| Voltage regulation | Ripple ≤0.5% / static ≤1% / dynamic ≤3% |
| Phases / frequency / input voltage | Three-phase / 50–60 Hz (±3 Hz) / 13.8 kV |
| Permissible voltage variation | −10% ~ +10% |
| Peak efficiency / THDi / power factor | 98.5% 峰值 / 50% 负载以上 <3% / >0.98 |
| Output overload | 105% continuous / 110% 60 min / 125% 10 min / 150% 0.2 s |
| Short-circuit fault clearing | 150% / 180 ms |
| Insulation level (BIL) | >95 kV |
| Partial discharge | <10 pC |
| Ambient temperature | −30 °C to +50 °C |
| Altitude | ≤2000 m |
| Cooling / ingress protection | Air cooled / IP20 (main unit) |
| Container rating | NEMA 3R / C5 |
| Communication | RS485 / Ethernet · Modbus RTU/TCP · IEC 104 · IEC 61850 |
以上为标称值。98.5% 为峰值效率。部分负荷下效率更低；收益测算应采用所供机组效率曲线上对应实际工作点的数值，而不是这个峰值。谐波、过载与故障穿越需在约定条件下实测，且故障穿越需与储能系统协同。未列出的参数不应假定已满足。
A released rating can be quoted before certification is complete. Where a project requires a certified unit, we say so in the proposal rather than afterwards.
Built from modules, with one spare in every string.
Each phase is a chain of nine two-in-one modules, each containing two identical submodules — 18 submodules per phase, one of them redundant. Per-phase cascading is what lets a single failed module be bypassed instead of taking the unit offline.
17 + 1 per phase
18 submodules per phase including one redundant module. Redundancy is a module count, not a claim about availability — actual availability depends on the redundancy strategy in your design.
Two-in-one modules
Nine two-in-one modules per phase, each containing two identical submodules. Fewer connectors and a shorter power path than discrete modules.
Online bypass
The design aims to reduce the effect of a module fault on delivery. Bypass conditions, derating and protection logic must be validated per project.
| Indoor core cabinet | 4700 × 1450 × 2300 mm · approx. 6 t · IP20 |
| 20-foot container solution | 6058 × 2438 × 2591 mm · NEMA 3R / C5 |
| Container contents | SST, fire protection, HVAC cooling |
| Derating above 40 °C | −0.5 MW per further 5 °C |
Final enclosure, weight, lifting points and interfaces follow approved customer drawings.
The SST is one layer, not the whole answer.
In an AI data centre the SST handles primary conversion, while storage, static var generation, high-voltage drives and an EMS coordinate around it. Each function sits in its own layer with its own protection boundary.
SST — primary conversion
MV AC to 800 VDC, with voltage regulation, power factor control and modular protection.
Energy storage PCS / BESS
Dynamic buffering and backup support. Capacity and connection point configured per project — and required for fault ride-through.
SVG — power quality
Campus-level reactive power and voltage support at the point of common coupling.
Drives + EMS
Energy efficiency for chiller pumps and fans, plus unified monitoring and energy dispatch.
Solution boundary: this layered view is a concept, not a standard scope of supply. Protection zones, the 2N strategy, storage connection points and emergency power logic require joint design with the customer.
Three ways to place an SST in a live facility.
The choice follows your POD design, redundancy strategy and retrofit scope — not a vendor preference. These are discussion models; the final architecture depends on your reliability target and site conditions.
One SST per POD
Dedicated conversion close to the load. Smaller fault domain, and capacity can be added POD by POD as phases come online.
Several SSTs, one DC bus
Multiple units feed a centralised DC bus. Requires parallel operation, coordinated protection and an availability design that is agreed up front.
Keep one path conventional
Retain one side of the existing 2N pair and add SST on the other. Limits the risk of a one-time retrofit while the new path proves itself.
中压直接充电，中间不需要变电站。
SST 直接吃 10–35 kV，输出可调直流。工频变压器和它那栋房子从图纸上消失。
中压直连
10 kV 或 35 kV 进，可调高压直流出。不需要降压变压器，不需要单独的低压间。
天生双向
V2G 是一种控制模式，不是多加的硬件。高峰时段能量可以直接回送电网。
光伏与储能在直流侧接入
光伏和电池接在同一组直流端口上，整个站是一个能源枢纽，而不是三套系统三个表。
兆瓦级充电典型配置。实际功率、电压与端口数按站点确定。
一个平台，从 2017 年起就在现场。
我们供货的 SST 不是新设计。它已经走过几代现场应用，每一代都在稳定交付。
首台中压 SST
国家级科研项目样机，±10 kV / ±375 V / 1 MW
直流变压器
±10 kV/±375 V/2 MW 示范电网
多端口路由器
3 MW IGCT 直流变压器，园区投运
数据中心 SST
3 × 10 kV / 2.42 MVA / 800 VDC，2023 年 9 月投运
SiC 代际
10 kV SiC 器件，开关频率提升
800 VDC 平台
面向 AI 数据中心的兆瓦级柜体 · 首笔出口订单：四台 13.8 kV 机组，交付中
- 每一条都是我方 SST 背后平台的研发与投运历程。
- Our own engineering, warranty, commissioning and service sit in front of that platform; the record above is why we can stand behind it.
- 部署案例与型式试验记录可对合格项目在保密协议下提供。
- 今天能报哪些等级，本页上文已逐个修订版列明。
这些部件怎么连。
三种参考配置。每一种都是系统研究的起点，不是目录上的标准品。
数据中心
新能源电站
充电 + 光伏 + 储能
端口数、电压等级与保护定值由系统研究确定。研究没做完之前，我们不报组合配置。
Six steps from design target to operating data.
A new platform closes reliability risk step by step. We publish which step each item has reached, so you can see where a claim is backed by a test report and where it is still a design target.
Design & failure analysis
Failure modes identified at design level, before hardware exists.
Component / module testing
Critical components and the module itself validated on the bench.
System-level testing
Full converter behaviour: control, protection, thermal path and bypass.
Third-party validation
Type testing against the standard that applies to the target market.
Demonstration data
Operating record from a live site, over a defined period and load profile.
Failure closure & consistency
Field failures closed out, and production consistency demonstrated across units.
- Voltage and short-circuit capacity at the point of connection
- Load profile, including the transient envelope
- POD and redundancy strategy
- Storage interface and control coordination
- Communication points and protocol list
- Environmental and fire protection requirements
- Certification path and acceptance criteria
- Feasibility discussion — whether the architecture suits your site
- Reference design — system configuration, interfaces and protection zones
- Joint validation plan — agreed milestones where evidence is still missing
- Or an honest "not yet" — if the timing does not work, we say so
关于这款产品真实状态，说明一下
两个等级已发布、可报价，平台也有在运机组和一笔在交付的出口订单。它还没有的，是型式试验证书，以及在云厂商批量采购清单上的位置。这两句话我们宁愿写在同一段里，而不是让你先看到前一句、之后才发现后一句。如果你的项目本季度就需要一台已做型式试验的 SST，我们会直说还没到那一步。