近日，延安安塞330kV方河变电站35千伏SPG示范工程主设备安装工作顺利竣工。合创时代为本项目提供10MW/0.5s超级电容系统，赋能SPG装置实现最高90Mvar短时无功爆发输出。本工程将有效破解陕北高比例新能源汇集区域弱电网电压支撑难题，保障14座风光场站电力稳定外送，筑牢西电东送特高压落点的电网安全屏障。

超级电容在SPG系统中的核心作用

SPG区别于传统SVG的关键，就是直流侧搭载大功率超级电容储能支路。合创时代开发的10MW/0.5s超容系统，是SPG实现“全功率补偿”的底气。

毫秒级瞬时大功率吞吐

10MW大功率，在电网故障瞬间快速输出，支撑SPG实现3倍短时过载功能，抑制特高压直流闭锁引发的暂态过电压、低电压跌落，避免风光机组大规模脱网。

吞吐稳定直流母线

在电网扰动、换流阀大功率动态输出时，快速平抑直流侧电压波动，保障IGBT串联换流阀稳定工作，让SPG稳态、故障、恢复全工况可靠运行。

高频次反复冲击工况耐受

电网故障扰动具有突发性、反复性，超级电容可承受高频大功率充放电，持续多次故障支撑，保障SPG反复响应电网冲击。

合创时代方案核心优势

大功率短时脉冲定制化设计

针对SPG0.5s短时爆发功率需求定制10MW超容集装箱，精准匹配SPG拓扑控制逻辑，满足短时大功率脉冲输出，不冗余、适配度高。

宽温域、高可靠性，适配陕北户外变电站环

超级电容工作区间- 40℃~70℃，陕北冬季低温环境仍可稳定满功率输出；百万次循环寿命，可长期承受高频次功率冲击，运维简单、寿命长。

集装箱一体化预制交

工厂内完成模组、CMS、热管理、消防、监测系统集成，现场仅需进行电气、通讯连接，施工周期短，结构紧凑、占地小，现场安装便捷。

全链路国产化自主可控

超容模组、CMS能量管理、系统集成全套自研，具备完善的电网工况仿真与联调能力，深度配合SPG整机控制策略，完成世界首台SPG示范工程攻关验证。

该项目落地，标志着超级电容大功率储能技术在世界首套SPG装备上成功工程化应用，为高比例新能源弱电网、特高压直流落点电压支撑，提供“电力电子 + 瞬时功率储能”全新国产化解决方案。

Congratulations on the successful commissioning of the supercapacitor system for the world's first Static Full Power Compensator (SPG)

Recently, the main equipment installation of the 35kV SPG demonstration project at the 330kV Fanghe Substation in Ansai, Yan’an has been successfully completed. Shaanxi Hechunk Era Technology Co., Ltd provided a 10MW/0.5s supercapacitor system for the project, enabling the SPG device to achieve a short-term reactive power burst output of up to 90Mvar. The project effectively solves the voltage support problem of weak power grids in high-proportion new energy gathering areas in northern Shaanxi, ensuring stable power transmission from 14 wind and solar power stations, and strengthens the power grid safety barrier for UHV receiving points of the West-to-East Power Transmission project.

Core Functions of Supercapacitors in the SPG System

The key distinction of SPG from conventional SVG lies in its DC side equipped with a high-power supercapacitor energy storage branch. The 10MW/0.5s supercapacitor system developed by Hechuang Times serves as the core enabler for SPG to realize full-power compensation.

1.Millisecond-level instantaneous high-power regulation:With 10MW high power capacity, it delivers instantaneous power output upon grid faults, enabling SPG to achieve 3-times short-time overload capability. It suppresses transient overvoltage and voltage sags induced by UHVDC block, and prevents large-scale disconnection of wind and solar units.

2.DC bus voltage stabilization:Under grid disturbance and dynamic high-power operation of converter valves, the system quickly suppresses DC-side voltage fluctuations, ensures stable operation of series-connected IGBT converter valves, and supports reliable operation of SPG under steady-state, fault and grid recovery conditions.

3.High-frequency impact resistance capability:Grid faults and disturbances are sudden and recurrent. The supercapacitor system supports high-frequency and high-power charge-discharge cycles, provides continuous fault support, and guarantees reliable and repeated grid response of the SPG system.

Core Advantages of Shaanxi Hechunk Era Technology Co., Ltd’s Solution

1.Customized design for short-duration high-power pulse scenarios:The 10MW supercapacitor container is specially developed for the 0.5-second burst power demand of SPG. It perfectly matches the SPG topology and control strategy, achieving accurate short-term high-power output with high adaptability and no redundant configuration.

2.Wide temperature adaptability and high reliability for outdoor substation operation:The supercapacitor system operates stably within a temperature range of -40℃ to 70℃, maintaining full-power output even in the low-temperature winter environment of northern Shaanxi. With a million-level cycle life, it withstands long-term high-frequency power impact, featuring low maintenance cost and long service life.

3.Integrated prefabricated container delivery:Supercapacitor modules, BMS, thermal management, fire protection and monitoring systems are fully integrated in the factory. On-site construction only requires electrical interface connection, which greatly shortens the construction cycle, reduces floor space and simplifies on-site installation in substations.

4. Full-chain independent domestic innovation:The supercapacitor modules, CMS energy management and full system integration are independently developed in-house. The system boasts robust grid condition simulation and joint commissioning capabilities, closely coordinating with the overall SPG control strategy to complete the research, validation and demonstration of the world’s first SPG prototype project.

The successful implementation of this project realizes the world’s first engineering application of high-power supercapacitor energy storage technology in SPG equipment. It provides a new domestic solution of “power electronics + instantaneous energy storage” for voltage support of weak grids with high new energy penetration and UHV DC receiving systems.