First, the definition is different.

天然氣分布式能源是指利用天然氣為燃料，通過冷熱電三聯供等方式實現能源的梯級利用，綜合能源利用效率在70%以上，并在負荷就近實現能源供應的現代能源供應方式，是天然氣利用的重要方式。與傳統集中式供能方式相比，天然氣分布式能源具有能效高、清潔環保、安全性好、削峰填谷、經濟效益好等優點

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

關于燃氣發電機組熱電聯產的定義，燃氣發電機組熱電聯產是指由熱電廠同時生產電能和可用熱能的聯合生產方式。”

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. "

二是兩者所生產的二次能源產品不同。

Second, they produce different secondary energy products.

天然氣分布式能源主要有冷、熱、電三種二次能源產品，講究的是“溫度對口、梯級利用”，也就是說能源充分利用，地利用能源避免能量浪費。而熱電聯產只是對熱和電做了要求，《供熱術語標準》中關于熱電聯產的概念也僅僅提到了電能和熱能。“在進行熱電聯產項目規劃時，應積極發展城市熱水供應和集中制冷，擴大夏季制冷負荷，提高全年運行效率”，文中將熱電聯產項目與熱水供應和集中制冷是作了明確區分的。

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.

三是運行方式不同。

Third, the operation mode is different.

天然氣分布式能源項目的運行方式更加靈活多樣，主要有孤網運行、并網運行、上網運行三種運行模式，其中天然氣分布式能源更注重的是自發自用為主、余電上網。而熱電聯產項目與傳統火電項目無異，基本上都是全上網模式(自備熱電聯產項目除外)，除廠用電用去很少一部分電能外，其余大部輸送給了電網。

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.

四是應用的場景不同。

Fourth, the application scenarios are different.

天然氣分布式能源服務的對象可以有工業企業、醫院、學校、辦公樓、商業樓宇、數據等。而熱電聯產多布局在工業園區，為一定區域里的工業企業服務。

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.

五是電力并網電壓等級要求不同。

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

《關于發展天然氣分布式能源的指導意見》明確規定，天然氣分布式能源“在低壓配電網就近供應電力”，也就是說，天然氣分布式能源項目的上網電壓等級不能過高。一般情況，天然氣分布式能源以0.4kv/10kv/35kv三種并網電壓等級接入。而燃氣熱電聯產項目由于裝機規模偏大，對變電站容量要求較高，一般在35kv以上，普遍在110kv及以上并網電壓等級接入。

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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