一、产品概述 / Product Overview
中文：光伏、风电、储能电站在电网扰动、电压暂降、瞬时掉电工况下，变流器直流母线容易出现电压跌落，引发变流器闭锁停机，造成场站脱网、非计划停运损失。DN-DC_VSS 电站直流侧应急电源直接并联接入电站直流母线，无需逆变环节，采用锂电池或超级电容作为储能介质，毫秒级完成母线电压支撑。当电网发生晃电、短时断电，为变流器提供直流侧能量补给，完成低电压穿越支撑，等待外部电源或者柴油机组接管负载，避免场站变流器闭锁停机，适用于新建风光储能电站配套以及存量储能、风电光伏场站改造升级项目。
English：When photovoltaic, wind power and energy storage power stations suffer grid disturbance, voltage sag and momentary power loss, the DC bus of converters is prone to voltage drop, which will cause converter latching and shutdown and result in off grid and unplanned outage losses. DN-DC_VSS power station DC side emergency power supply from Wenlida is directly paralleled to power station DC bus without inverter link. Adopting lithium ion battery or super capacitor as energy storage media, it implements millisecond level DC bus voltage support. During grid flicker and short time power failure, it supplies DC side energy supplement for converters to realize low voltage ride through, waiting for external power supply or diesel unit to take over loads and prevent converter latching shutdown. It is suitable for new built wind solar?storage power stations and renovation of existing energy storage, wind & PV power plants.
二、工作原理 / Working Principle
中文：电网正常运行工况，系统实时采样监测电站直流母线电压，对储能单元执行智能浮充、均衡维护，整机处于热备用待命状态。当电网扰动引发母线电压跌落至预设保护阈值，高速 DSP 数字化控制器即刻动作，双向 DCDC 模块释放储能能量，快速补偿稳住直流母线电压，保障变流器持续运行，实现场站低电压穿越；电网恢复正常后，设备自动退出应急模式，回到常态充电与监测值守，整套系统全自动无人值守运行。
English：Under normal grid operation condition, the system samples and monitors power station DC bus voltage in real time, performs intelligent floating charge and balanced maintenance for energy storage units, and the whole equipment stays in hot standby status. Once grid disturbance makes bus voltage fall to preset protection threshold, high speed DSP digital controller triggers immediately. Bidirectional DC DC modules release stored energy to compensate and stabilize DC?bus voltage, keep converters running and realize station low voltage ride through. After grid recovers, equipment automatically quits emergency mode and returns to normal charging and monitoring with fully automatic unattended operation.
三、核心产品优势 / Core Advantages
1. 毫秒级快速响应，零机械切换延时 / Millisecond?level Response, Zero Mechanical Switching Delay中文：全数字化 DSP 高速控制，不间断实时监测母线工况；故障瞬间释放储能能量，无机械开关动作，消除切换间隙，抑制母线电压快速下坠，防止变流器触发停机保护。
English：Full?digital high?speed DSP control for 24/7 real?time bus condition monitoring. Energy is released instantly upon fault occurrence without mechanical switch action. It eliminates switching gap, restrains rapid bus?voltage collapse and avoids converter shutdown protection.
2. 无逆变链路，提升场站系统可靠性 / No Inverter Link, Improve Power Station System Reliability中文：直接作用于直流母线，省去交?直?交逆变变换链路，消除逆变器单点故障风险；减少电能变换损耗，不改变原有电站主回路拓扑结构，外挂式接入，改造施工简单。
English：Directly acting on DC bus, removing AC?DC?AC inverter link and single?point failure risk of inverter. It reduces power conversion loss. Adopting external parallel access without modifying original main circuit topology of power station for simple renovation construction.
3. 模块化 N+X 冗余，支持并联扩容与热维护 / Modular N+X Redundancy, Parallel Expansion & Hot Maintenance中文：标准化功率模块架构，支持 N+X 冗余备份，多台设备并联扩容，功率范围 100kW?5MW；功率模块支持在线维护**换，无需整套系统停机，适配风光储能电站长期运维需求。
English：Standardized power?module architecture supports N+X redundant backup and multi?unit parallel expansion with power range from 100kW to 5MW. Power modules support on?line maintenance and replacement without full?system shutdown, meeting long?term O&M requirement of wind?solar?storage power stations.
4. 两种储能介质可选，适配不同场站工况 / Two Optional Energy?storage Media for Diverse Site Conditions中文：超级电容方案：循环寿命高，适合频繁电网扰动、短时低电压穿越场景；锂电池方案：**长应急支撑时长，适合需要较长时间能量补偿的储能场站项目。
English：Super?capacitor solution: long cycle life for frequent grid disturbance and short?time low?voltage ride?through scenarios. Lithium?battery solution: longer emergency support duration for energy?storage station projects requiring extended energy compensation.
5. 柔性无冲击投切，抑制母线震荡 / Flexible Impact?free Switching, Suppress Bus Oscillation中文：双向 DCDC 柔性闭环控制，充放电、投切全过程电压电流平滑，对电站直流母线无冲击，不会引入暂态震荡，保护变流器功率器件安全。
English：Bidirectional DC DC flexible closed loop control delivers smooth voltage & current during charging discharging and switching process, no impact to power station DC bus and no transient oscillation, protecting converter power devices.
6. 完备软硬件保护 + BMS 储能管理 / Complete Hardware?software Protection & BMS Energy storage Management中文：具备过压、欠压、过流、过热、短路、反接保护；内置 BMS 电池管理系统，实时采集储能单元 SOC、温度，故障告警预警，保障设备野外场站长期稳定运行。
English：Equipped with over voltage, under?voltage, over?current, over temperature, short circuit and reverse connection protection. Built?in BMS monitors SOC and temperature of energy storage unit with fault early warning for stable long?term field operation.
7. 工业通讯接口，对接电站监控系统 / Industrial Communication Interface for Power station SCADA中文：标配 Modbus RTU、CAN 通讯接口，可接入电站 SCADA 监控系统，上传功率、电压、SOC、告警状态，实现远程监视运维。
English：Standard Modbus?RTU and CAN communication interfaces for connecting power?station SCADA system, uploading power, voltage, SOC and alarm status to realize remote monitoring and operation & maintenance.
四、型号规格 / Model Specifications
型号命名规则 / Model Naming Rule：DN-DC_VSS?XXXK DN：迪能电气 DC_VSS：直流电压支撑系统（电站直流侧应急电源） / DC Voltage Support System (Power Station DC Side Emergency Power Supply)
XXXK：额定功率 (kW) / Rated Power (kW)
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机型型号 / Model
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DN-DC_VSS?100K
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DN-DC_VSS-200K
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DN-DC_VSS-500K
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DN-DC_VSS-1M~5M
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储能侧电压 / Storage Voltage
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300-700Vdc
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300-700Vdc
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300-700Vdc
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定制 / Customized
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电站母线电压 / Power?station Bus Voltage
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550-900Vdc
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550-900Vdc
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550-900Vdc
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定制 / Customized
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备注 / Remark：功率、电压、风冷 / 水冷散热、防护等级可根据场站项目需求定制开发 / Power, voltage, air cooling /water cooling and protection level can be customized according to project requirements.
五、典型应用场景 / Typical Application Scenarios
中文
- 光伏电站储能场站，直流母线低电压穿越抗晃电保护；
- 风力储能电站，电网暂降扰动工况下变流器直流侧应急支撑；
- 存量风光储能场站改造项目，外挂并联接入，不改动原有主回路；
- 电化学储能电站，应对电网短时故障，降低变流器闭锁脱网风险。
English
- Anti flicker protection for DC bus low voltage ride through of PV power stations and energy storage plants;
- DC side emergency support for converters of wind energy storage power stations under grid sag disturbance;
- Renovation for existing wind solar?storage stations, external parallel connection without modifying original main circuit;
- Electrochemical energy storage power stations, mitigating converter latching & off grid risk under short term grid faults.
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