久久成人在线观看_91视频首页_国产成人免费视频_国产成人一区_久久久久国产一区二区_国产一区二区三区在线免费

The working differences between gas and coal-fired power generation units

Release time:2022-10-29 Publisher:ZHONGTUO
In fact, the working principle of gas generator sets and coal-fired generator sets is the same. The main difference is that coal-fired power plants use boilers to burn coal, generate steam to drive the turbine, which then drives the generator. Gas generator sets, on the other hand, burn gas directly in the turbine to do work, drive the gas turbine to rotate, and then drive the generator. Although both are generating electricity, the power to drive the generator to generate electricity is different
 
Generally speaking, there are relatively few auxiliary systems for gas generator sets, so both gas turbines and generators are containerized, which shortens the construction cycle of gas generator sets. However, the auxiliary systems for coal-fired generator sets are relatively large, with many fans, pumps, fuel (coal) systems, and so on surrounding the boiler and steam turbine. Moreover, the cost of gas turbine wheels is higher than that of coal-fired power plants
 
Similarly, for power generation units, the difference in fuel creates the difference in the unit. After all, the fuel is fixed and the unit revolves around the fuel. Therefore, the working principles of different power generation units are different, resulting in differences in the price of power generation units
 
1. Single phase grounding protection is a single-phase grounding protection for the stator winding of a generator.
 
2. Low excitation and loss of excitation protection is required to prevent large generators from absorbing a large amount of reactive power from the system after the excitation current is below the static stability limit or the excitation current is lost to zero, which can have adverse effects on the system. Generators with a capacity of 120MW and above must be equipped with this protection.
 
3. Longitudinal differential protection for inter phase short circuit protection of stator winding and outgoing line.
 
4. The grounding protection of the excitation circuit is the grounding fault protection of the excitation circuit.
5. The transverse differential protection is used for the protection of one phase inter turn short circuit in the stator winding.
 
40KW50KVA natural gas generator unit Price of natural gas generator unit
 
6. Overload protection: Small and medium-sized generators are only equipped with set point overload protection; Large generators should be equipped with stator overload and excitation winding overload protection separately.
 
7. Stator winding overcurrent protection: When a short circuit occurs outside the range of generator longitudinal differential protection, the protection of the short-circuit component and the circuit breaker refuse to act. This protection is a backup for external short circuits and also a backup protection for longitudinal differential protection.
 
8. Out of step protection reflects the out of step protection of large generators and system oscillation processes.
 
9. Negative sequence current protection: When asymmetric short circuits and three-phase loads occur in the power system, such as electric locomotives, electric arc furnaces, etc., when the proportion of single-phase loads is too large, it can cause overheating at the rotor end, inner surface of the protective ring, and other places with high current density, causing local burns. Therefore, negative sequence current protection should be installed.
 
10. Stator winding overvoltage protection prevents stator winding overvoltage caused by sudden shedding of all loads. Both hydro generators and large turbine generators must be equipped with overvoltage protection, while small and medium-sized turbine generators are usually not equipped with overvoltage protection.

Previous post: Next chapter:Gas generator sets and their requirements for gas

Service

classification

product

recommendation

Contact

Information
  • Tel:0531-69953988
    13012995645
  • Add:101, Building 5, Liandong U Valley Science and Technology Innovation Center, Zhangjin Comprehensive Bonded Zone, No. 33688 Jingshi East Road, Suncun Street, Jinan Area, China (Shandong) Pilot Free Trade Zone

截屏,微信識(shí)別二維碼

  • 主站蜘蛛池模板: 一区二区三区视频在线观看 | 国产精品亚洲精品日韩己满十八小 | 国产成人女人在线观看 | 欧美国产一区二区三区激情无套 | 国产精品h片在线播放 | a视频免费在线观看 | 一级毛片一级毛片免费毛片 | 亚洲欧洲一区二区 | 色妞www精品一级视频 | 久久久一区二区三区不卡 | 一个人免费观看在线视频www | 一个人看的www免费视频中文 | 免费一级肉体全黄毛片高清 | 久久久久久影视 | 免费a级毛片无码专区 | 欧美丰满一区二区免费视频 | 国产精品香蕉成人网在线观看 | 亚洲图片综合网 | 国产乱理伦片a级在线观看 国产乱理伦片在线观看 | 国产男女猛烈无遮挡免费视频网站 | 久久国产首页 | 久草在线资源福利站 | 日韩国产一区二区 | 丰满熟妇乱又伦在线无码视频 | 国产精品夜间视频香蕉 | 91福利在线免费观看 | 99热成人精品热久久66 | 一个人看的ww免费视频 | 国产精品人人爽人人做我的可爱 | 成人a级毛片免费观看 | 日本一级看片免费播放 | 精品美女视频在线观看2023 | 国产精品资源在线观看网站 | 色爱两性网 | 国产成人精品久久一区二区小说 | 精品无码久久久久久久动漫 | 婷婷久久综合九色综合绿巨人 | 日日摸夜夜添夜夜添人人爽 | 久久午夜夜伦鲁鲁片无码免费 | 日韩在线播放中文字幕 | 不卡中文字幕在线 |