为实现能源转型和减少碳排放，必须大力发展可再生能源。生物质能作为其中重要的一部分，利用方式多样并有很好的发展前景。生物质气化－燃煤耦合发电是生物质能利用的重要技术和发展方向，它对燃煤锅炉影响小，发电效率高并便于监测电量。为分析和研究生物质气化与燃煤耦合发电的系统特性，首先需要了解生物质气化过程并获得生物质气化燃气的组分及相关气化指标。建立基于热化学平衡的生物质气化模型，用Visual Basic编程计算，得到燃气组分、气化指标与气化剂当量比、水分的关系曲线。结果表明：水分越高，燃气热值和气化效率越低，气化产率越高；气化剂当量比越大，气化产率和气化效率越高，燃气热值越低。这些关系曲线可为气化过程控制提供借鉴，也可为设计和优化生物质气化－燃煤耦合系统奠定基础。

To achieve energy transformation and reduce carbon emissions, renewable energy must be developed vigorously. As an important part, biomass energy can be used in a variety of ways and has good prospect for development. Biomass gasification-coal coupling for power generation is an important technology and development direction of biomass energy utilization, which has a small impact on the coal-fired boiler, high power generation efficiency and is easy to monitor electricity. In order to investigate the system characteristics of biomass gasification-coal coupling for power generation, it is first necessary to understand the biomass gasification process and obtain the components of biomass gasification gas and related gasification indexes. This paper establishes a biomass gasification model based on thermochemical equilibrium, and obtains the relationship curves between gas components, gasification index and gasifying agent equivalent ratio, water content through Visual Basic programming. The results show that with the increase of water content, the calorific value of gas and the gasification efficiency decrease, whereas the gas production rate increases. And as the gasifying agent equivalent ratio increases, the gas production rate and gasification efficiency increase, while the gas calorific value decreases. These relationship curves can provide reference for the gasification process control, and can also lay the foundation for the design and optimization of the biomass gasification-coal coupling for power generation system.