光储直柔系统应用案例 | PV-Storage-Direct-Flexible System Case
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出品方：稳利达电力电子 | Wenlida Power Electronics |
项目简介 | Project Introduction
本项目为光储直柔（光伏发电、储能、直流配电、柔性用电）一体化示范系统，由稳利达电力电子提供整套直流微网与多端口变流解决方案。系统采用750V直流微网组网，以提高效率、减少损耗：光伏侧配置700kW，分4路输入（3路200kW + 1路120kW MPPT DCDC）；并网侧配置500kW PCS（4台125kW并联）与AC400V电网连接；直流负载侧配置16路24kW DCDC向柔性直流负荷供电；电网端口与光伏端口均配置计量表，便于发电量统计。当光伏发电富余时可直接供给直流负载，多余电量经PCS馈入电网；当负荷不足时由电网经PCS向直流母线补给，实现光-储-荷-网的灵活能量调度。整机配置触摸屏与RS485/以太网双通道通讯，保护完备，故障解除后自动恢复运行。
This project is an integrated PV-storage-direct-flexible (PV generation, storage, DC distribution, flexible load) demonstration system, delivered by Wenlida Power Electronics as a complete DC-microgrid and multi-port conversion solution. The system is built on a 750V DC microgrid to improve efficiency and reduce losses: the PV side is rated 700kW with 4 input channels (3×200kW + 1×120kW MPPT DC-DC); the grid-tie side uses 500kW PCS (4×125kW in parallel) connected to the AC400V grid; the DC-load side has 16 channels of 24kW DC-DC feeding flexible DC loads; metering instruments are installed on both the grid port and PV port for generation statistics. Surplus PV power directly supplies DC loads, and excess energy is fed into the grid through the PCS; when generation is insufficient, the grid supplies the DC bus through the PCS, realizing flexible energy dispatch among PV, storage, load and grid. The unit features a touch screen, dual-channel RS485/Ethernet communication, comprehensive protections and auto-recovery after fault clearance.
系统拓扑说明 | System Topology Description
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图1：系统拓扑图 | Figure 1: System Topology Diagram |
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图2：光储直柔系统应用场景（见下方配图）| Figure 2: PV-storage-direct-flexible system application scenario (see image below) |
图2：光储直柔系统应用场景 | Figure 2: PV-storage-direct-flexible system application scenario
整套系统配置10寸本地触摸屏，供客户监控数据和触摸操作；提供一路RS485接口，支持遥控、遥测、遥调功能。系统采用直流微网方式组网，以提高效率、减少损耗；配置500kW PCS与电网连接；配置700kW光伏分4路输入，按光伏约70%发电量计算可满足直流负载使用，负载不用电时可通过PCS发电到电网；电网端口和光伏端口均配置计量表，方便发电量统计。
The system is equipped with a 10-inch local touch screen for on-site data monitoring and touch operation, and one RS485 port for remote telecontrol, telemetry and tele-adjustment. A DC-microgrid topology is adopted to improve efficiency and reduce losses. A 500kW PCS connects to the grid; 700kW of PV is fed in through 4 channels. Based on ~70% PV utilization, the generation can cover DC loads; when loads are off, surplus power is exported to the grid via the PCS. Metering instruments are installed on both the grid and PV ports for generation statistics.
完整全套参数表 | Complete Parameter Tables
表1 200kW光伏DCDC模块（DCDC 1-3）| Table 1 200kW PV DC-DC Module
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序号 No. |
电气类目 Category |
详细类目 Item |
规格 Specification |
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1 |
直流电压 DC Voltage |
光伏侧 / 母线侧 PV / Bus |
200-700Vdc / 额定 750Vdc |
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2 |
直流电流 DC Current |
光伏侧 / 母线侧 PV / Bus |
≤350A / ≤267A |
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3 |
转换效率 Efficiency |
HV 750V / LV 600V |
98% (lab conditions) |
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4 |
额定功率 Rated Power |
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200kW |
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5 |
工作模式 Operation Mode |
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MPPT / CV auto-switchover |
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6 |
电压稳定度 Voltage Stability |
静态 / 动态 |
±1% / ±3% |
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7 |
电流稳定度 Current Stability |
静态 / 动态 |
±1% / ±3% |
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8 |
通信接口 Communication |
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RS485 isolated (Modbus RTU); CAN2.0A/B isolated (up to 1M/s) |
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9 |
供电 / 保护 Power / Protection |
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220Vac; HV/LV over-/under-voltage, over-current, over-temp, communication; auto-recovery |
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10 |
尺寸 / 重量 Dimension / Weight |
L×W×H (excl. terminals) |
600 × 543 × 154 mm / 55kg |
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11 |
散热 Cooling |
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Air cooling |
表2 120kW光伏DCDC模块（DCDC 4）| Table 2 120kW PV DC-DC Module
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序号 No. |
电气类目 Category |
详细类目 Item |
规格 Specification |
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1 |
直流电压 DC Voltage |
光伏侧 / 母线侧 PV / Bus |
200-700Vdc / 额定 750Vdc |
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2 |
直流电流 DC Current |
光伏侧 / 母线侧 PV / Bus |
≤200A / ≤160A |
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3 |
转换效率 Efficiency |
HV 750V / LV 600V |
98% (lab conditions) |
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4 |
额定功率 Rated Power |
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120kW |
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5 |
工作模式 Operation Mode |
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MPPT / CV auto-switchover |
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6 |
电压/电流稳定度 Stability |
静态 / 动态 |
±1% / ±3% |
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7 |
通信接口 Communication |
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RS485 isolated (Modbus RTU); CAN2.0A/B isolated (up to 1M/s) |
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8 |
供电 / 保护 Power / Protection |
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220Vac; HV/LV over-/under-voltage, over-current, over-temp, communication; auto-recovery |
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9 |
尺寸 / 重量 Dimension / Weight |
L×W×H (excl. terminals) |
600 × 363 × 154 mm / 37kg |
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10 |
散热 Cooling |
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Air cooling |
表3 24kW负载DCDC模块（DCDC 5-20，16台并联）| Table 3 24kW Load DC-DC Module
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序号 No. |
电气类目 Category |
详细类目 Item |
规格 Specification |
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1 |
直流电压 DC Voltage |
负载侧 / 母线侧 Load / Bus |
待定 TBD / 额定 750Vdc |
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2 |
直流电流 DC Current |
负载侧 / 母线侧 Load / Bus |
待定 TBD / ≤32A |
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3 |
转换效率 Efficiency |
HV 750V / LV 600V |
98% (lab conditions) |
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4 |
额定功率 Rated Power |
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27kW (per module) |
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5 |
工作模式 Operation Mode |
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恒压 / 恒流 CV / CC |
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6 |
电压/电流稳定度 Stability |
静态 / 动态 |
±1% / ±3% |
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7 |
通信接口 Communication |
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RS485 isolated (Modbus RTU); CAN2.0A/B isolated (up to 1M/s) |
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8 |
供电 / 保护 Power / Protection |
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220Vac; HV/LV over-/under-voltage, over-current, over-temp, communication; auto-recovery |
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9 |
散热 Cooling |
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Air cooling |
表4 125kW PCS（PCS 1-4，4台并联）| Table 4 125kW PCS Module
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类别 Category |
项目 Item |
参数 Parameter |
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直流侧 DC Side |
电压范围 Voltage |
615-950V (3W+PE) / 650-950V (3W+N+PE) |
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**大输出功率 Max. Power |
125kW |
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**大输出电流 Max. Current |
203A |
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交流并网 AC Grid-tie |
输出线制 Wiring |
3W+PE (3-phase 3-wire) / 3W+N+PE (3-phase 4-wire) |
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额定功率 Rated Power |
125kW |
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额定电压 Rated Voltage |
AC400V (range -15% ~ +15%) |
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额定电流 Rated Current |
200A |
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额定频率 Frequency |
50Hz |
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功率因数 Power Factor |
1 leading ~ 1 lagging (configurable) |
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THDi |
≤3% (at rated power) |
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环境 / 结构 Environment |
工作温度 Operating Temp. |
-20℃ ~ +50℃ (derate above 45℃) |
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相对湿度 Humidity |
0%~95% RH, non-condensing |
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工作海拔 Altitude |
4000m (derate 2000-4000m) |
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冷却 / 防护 Cooling / IP |
Smart forced air cooling / IP20 |
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通讯 / 尺寸 Comm. / Size |
通信接口 Communication |
RS485, CAN |
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机柜尺寸 W×D×H (mm) |
500 × 670 × 255 |
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重量 Weight |
50kg |
表5 整机规格参数 | Table 5 Complete Unit Specifications
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端口 Port |
项目 Item |
参数 Parameter |
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光伏接口 1-3 |
**大输入功率 Max. Power (kW) |
200 |
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输入电压范围 Input Voltage (V) |
200-700 |
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MPPT范围 / 路数 MPPT Range / Count |
200-700V / 1 |
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**大输入电流 Max. Current (A) |
350 |
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光伏接口 4 |
**大输入功率 Max. Power (kW) |
120 |
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输入电压范围 Input Voltage (V) |
200-700 |
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MPPT范围 / 路数 MPPT Range / Count |
200-700V / 1 |
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**大输入电流 Max. Current (A) |
200 |
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负载接口 1-16 |
电压范围 Voltage (V) |
待定 TBD |
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**大电流 Max. Current (A) |
待定 TBD |
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额定功率 Rated Power (kW) |
24 (per channel) |
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电网接口 |
输出线制 Wiring |
3W+PE |
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额定功率 Rated Power |
500kW |
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额定电压 Rated Voltage |
AC400V (340-460Vac) |
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**大电流 Max. Current |
800A |
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额定频率 Frequency |
50Hz |
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功率因数 / 谐波 PF / THDi |
-0.9 ~ +0.9 / ≤3% (rated) |
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整机基本参数 |
工作温度范围 Operating Temp. (℃) |
-10 ~ +45 |
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相对湿度 Relative Humidity |
0 ~ 90%, non-condensing |
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**工作海拔 Max. Altitude (m) |
2000 |
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冷却方式 Cooling |
Air cooling |
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显示 Display |
Touch screen |
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系统供电 Aux. Power |
AC220V (User-supplied) |
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通讯方式 Communication |
RS485 (Modbus RTU) / Ethernet (Modbus TCP) |
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防护等级 Protection Class |
IP20 |
设备搬运说明 | Equipment Handling Instruction
机柜底座开有两个方形孔，搬运时叉车两根货叉通过方形孔叉入机柜底部，移动过程中需保证缓慢、平稳，避免设备磕碰倾倒。
Two square holes are reserved at the cabinet base. Insert two forklift forks through the square holes to the cabinet bottom during handling. Move slowly and steadily to prevent collision or tipping-over.
应用场景 | Application Scenarios
典型应用 | Typical Applications
? 科研院所、零碳园区光储直柔示范项目
? 新建办公楼、产业园直流配电与柔性负荷
? 数据中心直流供电、通信基站直流备用
? 近零能耗建筑、绿色建筑光伏直驱
? 直流微网、V2G与柔性负荷聚合调节
? R&D institutes and zero-carbon-park PV-storage-direct-flexible demonstration projects
? DC distribution and flexible loads for new office buildings and industrial parks
? Data-center DC power supply and telecom-base DC backup
? Nearly-zero-energy buildings and green-building PV direct-drive
? DC microgrids, V2G and flexible-load aggregation regulation
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定制说明：稳利达电力电子本系列产品支持定制开发，可根据光伏装机、储能配置、负载路数、PCS容量与计量方案灵活配置，适配不同项目的建设需求。 Customization Note: Customization available by Wenlida Power Electronics. PV capacity, storage configuration, number of load channels, PCS rating and metering scheme can be flexibly configured according to site conditions to meet various project requirements. |
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