丑凤麟 储   凡（中国建筑东北设计研究院有限公司，沈阳市 110006）

丑凤麟   储凡

Discussion on the Design of Distributed PV System for Commercial Buildings

CHOU Fenglin CHU Fan(China Northeast Architectural Design & Research Institute

Co.,Ltd.,Shenyang 110006，China)

Abstract：Based on project case,the content of electrical design of roof distributed generation photovoltaic system for a commercial building is introduced,including the selection of PV‑related main equipment,the design of PV array,and the connection of 0.4 kV low‑voltage grid to existing distribution system. Meanwhile,lightning protection and grounding for the system are improved according to the actual situation on site. Finally,the overall efficiency coefficient is corrected to estimate the electric energy production.

Key words：distributed PV system;PV rack;inverter;PV power to inverter power ratio;low‑voltage grid connection;lightning protection and grounding;overall efficiency coefficient;electric energy production

摘　要：结合项目实例，介绍某商业建筑屋面分布式光伏发电系统电气设计内容，从光伏相关主要设备选择、光伏阵列设计，到如何实现0.4 kV低压并网接入原有配电系统，并结合现场实际完善系统的防雷接地，最后通过修正综合效率系数，估算发电量。

关键词：分布式光伏发电系统；光伏支架；逆变器；容配比；低压并网；防雷接地；综合效率系数；发电量

中图分类号：TM615                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.09.003