First, the definition is different.

天然气分布式能源是指利用天然气为燃料，通过冷热电三联供等方式实现能源的梯级利用，综合能源利用效率在70%以上，并在负荷就近实现能源供应的现代能源供应方式，是天然气利用的重要方式。与传统集中式供能方式相比，天然气分布式能源具有能效高、清洁环保、安全性好、削峰填谷、经济效益好等优点

Natural gas distributed energy is a modern energy supply mode that uses natural gas as fuel and realizes cascade utilization of energy by means of CCHP. The comprehensive energy utilization efficiency is more than 70% and the energy supply is realized nearby the load center. It is an important way of efficient utilization of natural gas. Compared with the traditional centralized energy supply mode, natural gas distributed energy has the advantages of high energy efficiency, clean and environmental protection, good safety, peak shaving and valley filling, and good economic benefits

关于燃气发电机组热电联产的定义，燃气发电机组热电联产是指由热电厂同时生产电能和可用热能的联合生产方式。”

As for the definition of cogeneration of gas-fired generating units, cogeneration of gas-fired generating units refers to the combined production mode in which the thermal power plant produces electric energy and available heat energy at the same time. "

二是两者所生产的二次能源产品不同。

Second, they produce different secondary energy products.

天然气分布式能源主要有冷、热、电三种二次能源产品，讲究的是“温度对口、梯级利用”，也就是说能源充分利用，地利用能源避免能量浪费。而热电联产只是对热和电做了要求，《供热术语标准》中关于热电联产的概念也仅仅提到了电能和热能。“在进行热电联产项目规划时，应积极发展城市热水供应和集中制冷，扩大夏季制冷负荷，提高全年运行效率”，文中将热电联产项目与热水供应和集中制冷是作了明确区分的。

Natural gas distributed energy mainly includes three kinds of secondary energy products, i.e. cold, heat and electricity. What we pay attention to is "temperature matching and cascade utilization", that is to say, full utilization of energy, maximum utilization of energy and avoidance of energy waste. The concept of cogeneration in the standard of heating terms only refers to electric energy and heat energy. "When planning cogeneration projects, we should actively develop urban hot water supply and centralized refrigeration, expand summer refrigeration load, and improve annual operation efficiency." this paper makes a clear distinction between cogeneration projects and hot water supply and centralized refrigeration.

三是运行方式不同。

Third, the operation mode is different.

天然气分布式能源项目的运行方式更加灵活多样，主要有孤网运行、并网运行、上网运行三种运行模式，其中天然气分布式能源更注重的是自发自用为主、余电上网。而热电联产项目与传统火电项目无异，基本上都是全上网模式(自备热电联产项目除外)，除厂用电用去很少一部分电能外，其余大部输送给了电网。

The operation modes of natural gas distributed energy projects are more flexible and diverse, mainly including isolated grid operation, grid connected operation and on-line operation. Among them, natural gas distributed energy projects pay more attention to spontaneous self use and residual power on-line operation. The cogeneration project is similar to the traditional thermal power project, which is basically in the full grid mode (except for the self provided cogeneration project). Except for a small part of the power consumed by the auxiliary power, most of the rest is transmitted to the power grid.

四是应用的场景不同。

Fourth, the application scenarios are different.

天然气分布式能源服务的对象可以有工业企业、医院、学校、办公楼、商业楼宇、数据等。而热电联产多布局在工业园区，为一定区域里的工业企业服务。

The objects of natural gas distributed energy services can include industrial enterprises, hospitals, schools, office buildings, commercial buildings, data centers, etc. Cogeneration is mostly located in industrial parks, serving industrial enterprises in a certain area.

五是电力并网电压等级要求不同。

Fifthly, the requirements of grid connected voltage level are different.

《关于发展天然气分布式能源的指导意见》明确规定，天然气分布式能源“在低压配电网就近供应电力”，也就是说，天然气分布式能源项目的上网电压等级不能过高。一般情况，天然气分布式能源以0.4kv/10kv/35kv三种并网电压等级接入。而燃气热电联产项目由于装机规模偏大，对变电站容量要求较高，一般在35kv以上，普遍在110kv及以上并网电压等级接入。

The guiding opinions on the development of natural gas distributed energy clearly stipulates that natural gas distributed energy "supplies electricity nearby the low-voltage distribution network", that is to say, the grid voltage level of natural gas distributed energy projects should not be too high. In general, natural gas distributed energy is connected to the grid at three voltage levels of 0.4kv/10kv/35kv. However, due to the large installed capacity of gas-fired cogeneration projects, the requirements for substation capacity are relatively high, which are generally above 35 kV and 110 kV or above.

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