China's new energy auto industry's four joys and four worries
In the first half of this year, for China's new energy auto industry, it was a relatively worrying half year. The incidents of deception and battery catalogues made many domestic and foreign shorts prepare for full ammunition. In July, China Automotive Industry Association released half-year transcripts. In June, new energy vehicles sold 44,000 vehicles, up 20% from the previous month and up 107.3% from the same period of last year. The cumulative sales from January to June were 170,000, a year-on-year increase of 126.9%.
From the perspective of sales volume and growth rate, the development of electric vehicles is still in the fast lane. This is especially rare in the situation that government subsidies are declining year by year. However, only looking at the data does not reflect all the current situations. The energy auto industry is still facing four joys and four worries in the future.
One or four hi! New energy vehicle market acceptance continues to increase
1. The total sales volume is the world's first, showing a sustained and rapid growth trend.
In terms of total sales growth rate, China's new energy vehicle market continues to lead the world in the first half of the year. Evsaleblog data shows that Chinese auto companies accounted for 32% of the global electric vehicle market share from 32% in 2015 to 39% in the first half of 16 years, and expect 16 It will increase to 50% throughout the year.
2. Autonomous car companies occupy a place in the world's new energy vehicle sales list
From the sales volume in the first half of 2016, the data released by Evsaleblog shows that among the top 20 cars in the world, Chinese car companies occupy 9 seats, and BYD ranks first in the world. It is true that the current sales of self-owned new energy passenger vehicles are basically limited to the domestic market, but the new energy commercial vehicle industry has gone abroad and sold to all parts of the world including the United States.
3, the sales structure is continuously optimized, and star products emerge
In terms of the field, in the first half of the year, all new energy vehicles sold, the total sales of pure electric and plug-in passenger cars accounted for 71% of the total sales, the private sector continues to become the protagonist of electric vehicle consumption.
From the perspective of vehicle structure, the sales of electric passenger vehicles have transitioned from A00 to A-class vehicles. The monthly sales of medium-sized new energy vehicles represented by BYD Qin, BYD e6 and Roewe 550 are almost the same as the best-selling fuel vehicles.
4. The SUV market has become a new growth point
Benefiting from the inherent strong position of independent brands in the fuel vehicle market, more and more car companies are deploying new energy SUV market, Beiqi New Energy EX200, JAC iEV6S, Zotye SR7 electric version, etc. The listing will enrich the selection of products in this field, and BYD Tang is the third largest global new energy vehicle sales in the first half of the year.
Second, four worries! New energy vehicles are facing difficulties in the market outlook
1. The half-year target achievement rate is low.
Compared with the target of 700,000 new energy vehicles sold by the China Automobile Association at the beginning of the year, the sales volume of 170,000 new energy vehicles in the first half of the year is shabby. The target achievement rate is only 24%. To achieve the target, sales in the second half of the year. The pressure is huge.
2, catalogue models, less mature products
According to China Auto News, more than 200 new energy vehicle companies in China have obtained more than 4,000 models for production licenses. The actual production models account for only about 1/4 of the total, and there are fewer mature models available on the market. At least, under the new normal of China's economy, low-level redundant construction and blind investment in new energy vehicle projects are not conducive to the supply-side reform of the automobile industry.
3. Insufficient local policy drivers, exit or become new options
China's new energy vehicle market is still in a transition from policy-driven to market-driven. Local subsidies are one of the core drivers of policy-driven. In 2016, it was slightly insufficient. By the end of the deadline, about 80 new energy vehicle promotion demonstration cities were estimated to be roughly 60. The above cities are not issuing supporting policies, and only a few cities such as Beijing, Guangzhou, Shenzhen and Hangzhou have implemented 1:1 implementations.
What is even more amazing is that on July 11, the Shijiazhuang Municipal Government issued a notice to adjust the subsidy policy for new energy vehicles. Individuals purchasing new energy vehicles will not enjoy local subsidies. In the future, “local subsidy withdrawal†may become more local governments. New option.
4. In the second half of the year, the battery catalogue or the price of new energy vehicle terminals will rise.
The ternary material battery has become the mainstream choice for domestic new energy vehicle enterprises. Relevant data show that 33 domestic new energy vehicle products use ternary lithium batteries, but their main suppliers, Samsung SDI and LG Chem, have not appeared in the country. The list of four batches of qualified batteries was introduced.
According to Industrial Securities Research, the domestic demand for ternary batteries in 2016 was 9.5 Gwh, and the effective capacity of the whole industry was around 12 Gwh. However, the joint ventures such as Samsung and LG totaled over 4 Gwh. In the following six months, the sales volume of domestic new energy vehicles broke out, and the supply of ternary batteries was in short supply. The situation may directly lead to an increase in the price of new energy vehicle products,
In July, the fire will be carried out in September, and the autumn will be the harvest season. It may also be the transitional stage when the weather is gradually getting colder. The Chinese new energy auto market, which has not yet been cleared, will still face mixed uncertainty. In this regard, Yao Jie, deputy secretary-general of the China Automobile Association, is very optimistic. He said: "Based on the regular changes in the production and sales data in the second half of the year, the China Automobile Association predicted that the production and sales targets of 700,000 vehicles will remain unchanged this year."
Characteristic and performance analysis of main parts of generator
Stator:
Stator consists of base, stator core and stator windings.
The base is welded by steel plate, the structure is light and sturdy, and the base is divided into many air inlet and outlet zones in the axial direction;
Stator coil:
It is stacked by strands of copper wire covered by polyester glass fiber, with half-unit type and basket shaped structure (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions.
Stator core:
Stator core is punched and stacked by cold rolled non-oriented, high permeability, low loss high-quality silicon steel sheet, both sides of the silicon steel sheet are coated with a solid insulating film to prevent short-circuit between the stator core pieces to reduce eddy current loss.
Rotor:
The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc. The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation.
The shroud ring at rotor coil end is made of non-magnetic steel. Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy.
Rotor machining:
The generator shaft is forged from an integral high-quality alloy steel and has an axial groove formed thereon for fitting a rotor coil and an air groove or a crescent groove is made in the large tooth to enhance the cooling of the main body and the coil end. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator.
The generator rotor must be subjected to high-speed dynamic balancing experiment and dynamic impedance experiment before delivery to verify the mechanical strength of the rotor and ensure excellent inter-turn insulation of the rotor windings.
(2)Model
Mainly produce the following model steam turbine generator and the specifications are as follows:
Voltage(KV) Frequency(HZ) Power(MW)
2 poles steam turbine generator 6.3-3.8 50 3-60
6.6-13.8 60
4 poles steam turbine generator 0.4/0.69 6.3/6.6 10.5/11 50 0.5-30
0.4-11 60
QNP steam turbine generator uses closed-loop air self-circulation ventilation.
The rotors of turbo-generator under 50MW adopt indirect ventilation cooling method;
The rotors of 50MW and above turbo-generator is directly ventilated and cooled; an auxiliary groove is machined under the rotor winding trunking; air vents are machined on the rotor windings; with the action of the fan head and the centrifugal pressure head of the air vents, the rotor windings are directly cooled by air from the auxiliary groove and air vents.
(4)Excitation mode
QNP's steam turbine generator can adopt static silicon controlled type, two-pole AC brushless excitation and three-pole AC brushless excitation, three kinds of excitation mode.
(5)Insulation system
Adopt class F insulation materials and insulation structure, during the running time, assess the system according to class B insulation grade, meanwhile some margin has been kept.
(6)Design and acceptance criteria
Design, manufacture, inspection are carried out according to the relevant national standards, at the same time can meet the International Electrotechnical Commission IEC34-1 latest standards. According to customer`s requirements, QNP`s steam turbine generator can also be designed, manufactured and accepted according to ANSI, NEMA and other international standards.
(7)Technical Performance Analysis
1.Output margin
The series of steam turbine generator of QNP keeps 10% output margin.
2.Loss and efficiency
The steam turbine generator of QNP optimized the design and farthest minimized the additional loss and wind abrasion of generator under no-load and short-circuit condition, improved the efficiency of the generator, in general, QNP steam turbine generator`s efficiency is 0.2% higher than domestic similar models in this industry. It is higher than the national efficiency standard on the same capacity level. For example: QNP 15MW steam turbine generator`s efficiency value can reach 97.65%, and the national standard value is 97%.
3.Running reliability
QNP's steam turbine generator adopts advanced manufacturing technology, especially the rotor`s overspeed test uses high-speed dynamic balancer, rotor`s balance precision has been greatly improved, and the rotor`s vibration value is decreased. So that the steam turbine generator`s running availability factor has been improved, and the unit`s forced outage rate is decreased. At present, the availability factor of the steam turbine generator can reach about 99%, and the forced outage rate fell to 0.04% to 0.4%. Overhaul interval is up to 5 years. And the unit life can reach to 35 to 40 years.
Model meaning
QFWD-3-2A
QF Steam turbine generator
W W means brushless, without W means static silicon controlled
D D means double support, without B means single support
3 Rated power
2 2 means two poles and means the rated rotation speed is 3000 r/min
4 means four poles and means the rated rotation speed is 1500 r/min
A means the design serial number: A.B.C.D
Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation
Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be