Five major power industry
With the convening of the two sessions in 2014, the heating industry has frequently blown warm winds. In terms of specific aspects, there are five major advantages:
First, the issue of water and electricity price reform was broken, and the annual energy work guidance was issued. The Development and Reform Commission issued a notice to improve the mechanism for the formation of hydropower prices, marking a substantial step in the reform of the hydropower electricity price formation mechanism that reduces government intervention and enhancing the role of the market; at the same time, the annual energy work guidance was issued, and special supervision of energy-saving and emission-reduction prices started. Set the tone for the future development of the power sector.
Second, the Ministry of Finance website recently issued the “Notice on Value-Added Tax Policies for Large-scale Hydropower Enterprises†to clarify the preferential VAT policies for large hydropower enterprises. This is another major benefit for the power industry this year, following the breaking of the hydropower price reform.
Thirdly, Lu Qizhou, member of the National Committee of the Chinese People's Political Consultative Conference and general manager of China Power Investment Corporation, disclosed that CPI will start mixed ownership reform this year and will allow private equity participation in some of CPI's subsidiaries and construction projects. The proportion of private equity participation will reach three-thirds one. This is the first large-scale state-owned enterprise in the power industry that has explicitly stated that it has initiated a mixed ownership reform.
Fourth, on March 12, the Bohai Bay thermal coal price closed at RMB 538/ton, which was RMB 10/ton lower than the previous reporting period. The Bohai Bohai thermal coal price has dropped for 9 consecutive weeks. For thermal power companies, this is expected to ease the cost pressure from the downstream, and the gross margin level will continue to increase in the future.
Fifth, it is reported that the pilot scheme for preferential shares pilots is expected to be introduced soon. It is expected that the official issuance will be implemented in the second half of the year. The relevant companies are ready to start the issuance of the pilot management measures. Analysts expect that companies in the banking and power sectors are most likely to benefit.
Mine general transformer
It is used in the mine where there is coal dust and methane but no explosion danger, for electric drive and lighting. This transformer is oil immersed. Its internal structure and working principle are the same as those of ordinary oil immersed power transformer. The main difference is the housing and the inlet and outlet devices.
The mining general transformer has a firm structure and low appearance. There is no oil conservator on the upper part of the transformer, and proper space is left on the oil level in the oil tank to prevent excessive pressure in the oil tank when the vent on the tank cover is blocked. The mechanical strength of the oil tank can withstand the pressure of 0.1 MPa without permanent deformation. The high and low voltage incoming and outgoing lines of the mining transformer are all cable junction boxes filled with insulating glue.
The capacity of mining general transformers is 50, 100, 180, 320 KVA, etc. Non excitation voltage regulation is set at the primary side of the transformer, and the voltage regulation range is ± 5%; Six terminals are led out from the secondary side coil, which can be Y/△ connected to obtain 690/400V or 1200/690V.
Mine flameproof transformer
It is used in places with explosion risk in mines. This type of transformer is mostly made of dry type, and its main structural feature is that all the joint surfaces of the box shell are made according to the requirements of explosion-proof, and can withstand the internal pressure of 0.8 MPa.
The capacity of dry-type transformer for mining is generally 4 KVA and 2.5 KVA, which are specially used to supply power for electric drill, lighting, signal and other equipment. Its incoming and outgoing lines are led out by cables through outlet sleeves. There are 380 V and 660 V voltages on the primary side; The secondary side voltage is generally 133 V.
Satons flameproof transformer with a capacity of more than 100 KVA is often combined with flameproof switch box to form a complete set of flameproof mobile substation. Its output voltages are 400V, 690V and 1200V to meet the needs of mine electrical equipment. In order to adapt to tunnel transportation, the transformer structure height should be low. In this way, the iron column diameter can be larger, and cold rolled silicon steel sheets are generally used. 100 KVA and above are usually Class H insulation.
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