500kW光伏DCDC汇流柜 | 3路200kW MPPT·200-700V·750V母线·98%高效

500kW光伏DCDC汇流柜 | 3路200kW MPPT·200-700V·750V母线·98%高效 | 500kW PV DC-DC Combiner Cabinet | 3×200kW MPPT · 200-700V · 750V Bus · 98% Efficiency

项目简介 | Project Introduction

本项目为500kW光伏DCDC汇流柜，由稳利达电力电子提供整套光伏MPPT变换与直流母线汇流一体化解决方案。系统由3台200kW光伏MPPT DCDC模块并联构成（整机额定500kW），光伏侧电压200-700Vdc（单模块**大输入电流350A），变换至额定750Vdc直流母线（整机**大输出电流667A），转换效率98%。设备实现光伏阵列经MPPT**大功率跟踪后稳定汇入750V直流母线，供后级PCS并网或直流负载使用；支持MPPT/恒压自动切换，静态稳定度±1%、动态±3%。配置触摸屏、RS485（Modbus RTU）与LAN（Modbus TCP）双通道通讯，保护完备，故障解除后自动恢复运行，风冷、IP20防护，适用于大型光伏电站、光储一体、直流母线光伏直供及光储充等场景。

This project is a 500kW PV DC-DC combiner cabinet, delivered by Wenlida Power Electronics as an integrated PV MPPT conversion and DC-bus collection solution. The system consists of three 200kW PV MPPT DC-DC modules in parallel (rated 500kW): PV side 200-700Vdc (max 350A input per module), converted to a rated 750Vdc DC bus (max 667A output for the whole unit), at 98% efficiency. The device realizes MPPT maximum-power-point tracking of the PV array and stable collection onto the 750V DC bus for downstream PCS grid-tie or DC loads, with auto MPPT/CV switching, static stability ±1% and dynamic ±3%. It features a touch screen, dual-channel RS485 (Modbus RTU) and LAN (Modbus TCP) communication, comprehensive protections with auto-recovery, air cooling and IP20 protection. It suits large PV plants, PV-storage integration, PV-direct DC buses and PV-storage-charging applications.

系统拓扑说明 | System Topology Description

图2：500kW光伏DCDC汇流柜应用场景 | Figure 2: 500kW PV DC-DC combiner 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。3路光伏阵列（200-700Vdc）分别经3台MPPT DCDC变换后并联汇入750V直流母线，统一向负载或后级供电；所有电缆和信号线均采用底部下进线、下出线方式。

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. Three PV strings (200-700Vdc) are respectively converted by three MPPT DC-DC modules and paralleled onto the 750V DC bus for unified load or downstream supply. All power and signal cables enter and exit from the bottom.

完整全套参数表 | Complete Parameter Tables

表1 200kW光伏DCDC模块电气参数 | Table 1 200kW PV DC-DC Module Parameters

表2 整机规格参数 | Table 2 Complete Unit Specifications

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

? 大型集中式/分布式光伏电站直流汇流

? 光储一体、光伏直流母线直供

? 光储充一体站光伏侧MPPT变换

? 工业厂房屋顶光伏 + 直流微网

? 光伏 + PCS 并网前级变换

? DC collection for large centralized/distributed PV plants

? PV-storage integration and PV-direct DC buses

? PV-side MPPT conversion for PV-storage-charging stations

? Roof PV + DC micro-grid for industrial plants

? Front-stage conversion before PV + PCS grid-tie