Economic Model and Key Influencing Factors of Rooftop Distributed Photovoltaic Power Generation in the Whole County

doi:10.12096/j.2096-4528.pgt.24082

Abstract

Abstract:

Objectives In the context of the “dual carbon” goal and new energy grid parity, the economic analysis of rooftop distributed photovoltaic in the whole county is carried out, in order to explore the feasibility of the county-wide distributed photovoltaic mode. Methods Based on the cost-benefit theory, the cost and benefit components of the whole life cycle of distributed photovoltaic system are analyzed, and the economic model is established. Taking a residential distributed photovoltaic power generation demonstration zone in Suzhou as an example, the economic feasibility analysis is carried out by selecting the net present value, dynamic payback period and internal rate of return. Moreover, the impact of sensitive factors such as government subsidies, installed capacity costs and operation and maintenance rate on its economy is further analyzed. Results With or without government subsidies, in the case of low equipment operation and maintenance rate, the income under the owner operation mode is the highest. In the case of high equipment operation and maintenance rate, the cooperative operation mode has the highest benefit. Conclusions The rooftop distributed photovoltaic power generation in the whole county should choose a reasonable operation mode under different operation and maintenance rates. Investors can choose the best operation mode according to specific needs, reduce investment risks and improve the comprehensive benefits.The research results can provide a reference for the subsequent investment decision-making of photovoltaic projects in the county.

Key words: carbon peak, carbon neutrality, new energy, distributed photovoltaic power generation, economic model, operation and maintenance mode

CLC Number:

TK 51

Kun ZHUANG, Zhonghong WANG, Yifan ZHANG, Wenqian YIN, Maoyun LEI, Jing ZHU, Feng LI, Jilei YE. Economic Model and Key Influencing Factors of Rooftop Distributed Photovoltaic Power Generation in the Whole County[J]. Power Generation Technology, 2025, 46(5): 950-958.

Figures/Tables 11

References 23

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开发对象	单位装机成本/(元/W)	年发电小时数/h
居民用户	3.4～4.0	1 200
工商业用户	3.8～4.5	1 050～1 100
公共建筑用户	3.5～4.0	1 250～1 300
党政机关用户	3.5～4.5	1 250～1 300

开发对象	单位装机成本/(元/W)	年发电小时数/h
居民用户	3.4～4.0	1 200
工商业用户	3.8～4.5	1 050～1 100
公共建筑用户	3.5～4.0	1 250～1 300
党政机关用户	3.5～4.5	1 250～1 300

地区	平均年利用小时数/h
地区	独立光伏电站	建筑并网系统	开阔地并网系统
西北	1 250	1 450	1 540
东南	1 000	1 200	1 250
全国	1 100	1 250	1 350

地区	平均年利用小时数/h
地区	独立光伏电站	建筑并网系统	开阔地并网系统
西北	1 250	1 450	1 540
东南	1 000	1 200	1 250
全国	1 100	1 250	1 350

参数	数值
系统平均发电效率/%	85
年发电量/(kW⋅h)	2.04×106
运行寿命周期/a	25
年设备运维率/%	0.75
固定资产残值率/%	5