Recently, many serious accidents have occurred in various regions across the country, resulting in major casualties and property losses. The safety production situation is very serious. This made the whole society have more stringent requirements for safe production and sounded the alarm for the safe operation of the power grid. At the same time, some new development trends are emerging in the power grid field, which poses challenges to the original operating rules of the power grid and further increases the pressure for the safe operation of the power grid. In this regard, China's power grid companies have researched and deployed safe production work, taken resolute and effective measures, and made every effort to ensure a safe and stable situation.
Electricity supply and demand face new situation this summer
At present, the summer peaks and the electricity load increases. It is predicted that the electricity demand of the whole society will increase significantly. Among them, Sanhua Power Grid is basically balanced; Beijing-Tianjin-Hebei and Zhejiang Power Grid are in a state of tight balance; the delivery and absorption of southwestern hydropower will be under great pressure... These are the new conditions faced by electricity supply and demand this summer.
Since the beginning of this year, natural disasters have been frequently affected. Ice disasters, haze, winds, lightning strikes, and hill fires have repeatedly affected the safe operation of the power grid. For example, the 500-mV Dongming station in Jiangsu has been completely shut down due to severe haze flashovers. Similar failures occur during summer peak loads and will have a major impact on grid operation and power supply. At the same time, the flood prevention situation is also more severe. Shuai Junqing, deputy general manager of the State Grid, pointed out earlier: It is predicted that in this year's flood season, the country's climate will be moderately deviant, the East China River and other river basins, the reservoir basins in the northeast, the upper reaches of the Yellow River in the northwest, and the Hangang River will face heavy water, and there may be large public opinion.
In addition, there are also some problems in the operation of power grid equipment, including large-scale hydropower floods during the flood season, which will make the cross-regional and inter-provincial tie-lines reload, some of the city's power distribution networks are still weak, and equipment quality problems are prominent. If 32 units of the Three Gorges are fully opened, approximately 28 million kilowatts of hydroelectric power in Sichuan hydropower and western Hubei will be brought together in the near-area power grid of the Three Gorges. The problem of evacuation, dynamic stability and short-circuit current exceeding the standard is prominent.
Power grid safety production faces new challenges
According to briefings, at present, the grid is under construction, under construction, and put into operation. The power grid construction and operation management are constantly facing new situations and new problems. There are also large safety risks in infrastructure construction sites; large-scale concentrated development of wind power and solar power generation, and With the large number of distributed power supplies, the difficulty of operation control of the power grid and the risk of safe and stable operation are significantly increased.
Butterfly valve is a simple structure of the control valve can be used for low-pressure pipeline media control switch.Butterfly valve means the closure (valve flap or disc) as a disc, rotating around the valve shaft to open and close.Butterfly Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, slurries, oils, liquid metals and radioactive media. Mainly in the pipeline cut off and throttling effect. Butterfly valve opening and closing pieces is a disc-shaped disc, the valve body around its own axis of rotation, so as to achieve the purpose of opening and closing or regulation.
Type: Wafer Type, Lug Type, Grooved type
Design Pressure: PN6-PN20,Class 125-Class150
Working Temperature: EPDM 16Bar at -10℃ to 120℃; NBR 16Bar at -10℃ to 82℃; Viton 16Bar at -10℃ to 150℃
Suitable Midium: Water,Oil,Gas
Details as follow drawing:
3.Grooved Type Butterfly Valve
Butterfly Valves
Butterfly Valves,Wafer Type Butterfly Valve,Lug Type Butterfly Valve,Cast Iron Butterfly Valve
HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , http://www.zifengpipeline.com