The high-altitude satellite 5 atmospheric environment detection load is officially delivered

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[ China Instrument Network Instrument Development ] On March 21, the Ministry of Ecology and Environment, China Meteorological Administration, China Satellite Launch Measurement and Control System and other user units signed a high-input satellite in-orbit certificate for use in Beijing, which marked the high score. The atmospheric environment detection load of the No. 5 satellite is officially delivered.

The high-scoring satellite No. 5 is China's first full-spectrum hyperspectral remote sensing satellite that realizes comprehensive observations of the atmosphere and land. It has successfully completed all on-orbit testing tasks. The high-scoring No. 5 satellite carries a total of six loads, including three main load atmospheric trace gas differential absorption spectrometers (EMI) for atmospheric environmental detection, atmospheric major greenhouse gas monitors (GMI), and atmospheric aerosol multi-angle polarization detection. The instrument (DPC) was undertaken by the Anhui Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences. The three load pins mainly provide fast and accurate global information acquisition of sensitive components of the Earth's atmosphere, thus achieving comprehensive detection of major atmospheric pollutant gases, greenhouse gases, clouds and aerosols.
On May 9, 2018, the high-altitude satellite No. 5 was successfully launched as China's first high-resolution atmospheric environment observation satellite. Three atmospheric environmental detection loads were launched during the month, and for the first time in the orbit test, China acquired atmospheric trace gases. The global distribution of nitrogen dioxide, etc., the use of a new technology system of the main atmospheric greenhouse gas monitor (GMI) to obtain accurate greenhouse gas spectral data; as the world's only operational in the orbit of the use of polarization technology to detect aerosols The satellite acquired multi-spectral and multi-angle polarized images and successfully inverted global aerosol and optical aerosol products on the land and ocean and cloud phase classification products. On December 21, 2018, the atmospheric environment detection load passed the on-orbit test summary review organized by the Aerospace Eighth Environmental Satellite Project Office.
The user bases of the Satellite Environment Application Center of the Ministry of Ecology and Environment, the National Satellite Meteorological Center of the China Meteorological Administration, and the Ministry of Environmental Protection confirmed that all the three load indicators met or exceeded the technical requirements of the test specifications, while using the high-point satellite atmosphere. Trace gas differential absorption spectrometer (EMI) data products, atmospheric aerosol multi-angle polarization detector (DPC) and atmospheric main greenhouse gas monitor (GMI), the global ozone, nitrogen dioxide and other trace gas distribution, ash Pollution distribution and inversion studies of atmospheric greenhouse gases. The user unit realized the remote sensing quantitative inversion of ozone, nitrogen dioxide, sulfur dioxide, PM2.5 concentration, ash pollution, carbon dioxide and methane distribution to produce thematic products. Through comparison and analysis with international gas inversion products of similar loads, the user unit believes that the inversion accuracy of EMI and GMI loads is high, reaching the international advanced level of similar loads, and carrying out monitoring of ozone, nitrogen dioxide, sulfur dioxide, carbon dioxide and methane. The application capability of the stage evaluation; DPC payload is the only satellite remote sensor in the world that can detect the aerosol by using polarization technology. It has stable performance, clear image, strong stray light suppression ability and data with various types of gas. Production capacity of sol and cloud products.
After the high-point No. 5 satellite atmospheric environment detection load is officially delivered, it will formally provide applications, provide important scientific and technological support and space information services for China's environmental pollution prevention and control work, and improve the level of quantification and refinement of atmospheric remote sensing monitoring in China.
(Original title: The high-altitude satellite 5 atmospheric environment detection load is officially delivered)


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



Generators

Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation

Shandong Qingneng Power Co., Ltd. , http://www.steamturbine.be