I. High & Low voltage cabinets installation of power plant
1. 10KV high voltage switch cabinet installation of power plant
2. 0.4KV low voltage switch cabinet installation of power plant
3. Installation of generator protection system, synchronization system, transformer protection, H.V. motor protection, circuit protection in a power plant.
II. Electrical configuration testing items of power plant
1. Vacuum circuit breaker insulation resistance measurement, each phase circuit resistance measurement and AC voltage withstand tests of 10KV H.V. switch cabinet.
2. DC resistance measurement of CT and PT, polarity test, ratio test, AC voltage withstand tests in 10KV H.V. switch cabinet.
3. AC voltage withstand tests for whole 10KV H.V. switch cabinet.
4. AC resonant test for 10KV H.V. electric cable.
5. DC resistance measurement of generator stator and rotor.
6. Generator stator coil insulation resistance measurement and DC voltage withstand tests.
7. Generator rotor insulation resistance measurement.
8. Generator rotor AC impedance and power loss tests.
9. No-load characteristic test of generator
10. Generator checking phase sequence (fist checking phase and second checking phase separately).
11. Generator short circuit characteristic test.
12. Measurement of residual voltage of stator after automatic magnetic blow-out and switch opening of generator.
13. Generator shaft voltage measurement.
14. Generator simulate synchronization.
15. All of the second circuit checking, measuring, switch tripping & closing tests, protection fixed value setting, protecting the STG trip test and magnetic blow-out tripping test for Steam Turbine and generator.
III.Electrical problem troubleshooting in power plant
Problem Description: a coal mine`s 35KV H.T. switchgear OC protection tripped suddenly in He`nan Province, it caused sudden power lost of mine fan and endanger miner safety.
Auto-reclosing via switchgears` automatic reclosing function, through analysis, the reason is a set of 3000KW generator failure. Specific reason is: When the turbo-generator was running normally, exciting voltage lost suddenly, leading phase operation happened, the generator absorbed reactive power and lead to becoming motor running. Generator protection and power plant connecting line protection did not launch. After the generator absorbed a certain value of reactive power, the 35KV H.T. switchgear`s OC protection tripped.
Investigation: generator and power plant connecting line protection setting fixed value exceed the protection fixed value of 35KV switchgear side, it lead to nearby protection did not launch and override trip when generator failure.
Electrical Cabinet Care,10Kv Electrical Cabinet Care,0.4Kv Electrical Cabinet Care,Electric Governing Reconstructing Shandong Qingneng Power Co., Ltd. , http://www.qnpturbines.com
In the first half of 2014, the domestic LED lighting market quickly opened up in line with international trends, and the industry's prosperity continued to increase. Driven by the strong demand in the downstream lighting market, the LED upstream chip industry achieved rapid growth. In the first half of the year, the overall performance of LED chip companies was good, and the new trends displayed on the chip side were even more remarkable. The production capacity is full, and the stock market is like a mirror. The fine microwave will reflect the development status of enterprises and industries. The LED chip market is no exception. In the first half of the year, the stock market of listed chip companies has been all the way. Recently, LED chip listed companies Sanan Optoelectronics, Huacan Optoelectronics and Ganzhao Optoelectronics released the first half of 2014 performance forecast respectively, in which Sanan and Huacan respectively increased by 40, 185-215, and the dry photos were pre-decreased by 5-25. Sanan Optoelectronics said that with the penetration of LED lighting, LED demand is strong, so far has not slowed down. During the reporting period, the company's production capacity has further improved and its profitability has continued to increase. The Huacan Optoelectronics Announcement, which has the largest increase in earnings, said that since the second half of last year, the growth of LED chip market demand has continued, the decline in product prices is basically reasonable, and the profitability has rebounded significantly. The LED chip companies in Taiwan, represented by Jingyuan, Yuyuan, New Century, Dingyuan, Taigu, etc., have different performances in 2013. However, with the vane meaning of the wind vane, the loss of profit from the loss, The overall trend of the industry's overall recovery is obvious. It is understood that the performance of chips such as Philips Lumileds and Osram has also achieved a high growth. Zhou Xuejun, director of marketing for Philips Lumileds Lighting Asia, said that since the chip business involves more segments, it has added four agents since last year, using their own channels to expand the market segment, compared with last year. The number of digits has increased, and the company's overall orders have achieved steady growth, and more orders will be seen in the second half of the year. In the first quarter of 2014, most of the companies were full of capacity, showing a low season. In the second quarter, the main production equipment MOCVD of all enterprises will be fully operational, and the revenue performance will also challenge the new high. It is expected that the output of the entire chip market will continue to grow rapidly after 2014. LED chip factory plus code expansion price fell in the first half of the year, LED chip manufacturers' performance is popular, the chip market is extremely hot, and the full capacity seems to be unable to meet the needs of the downstream market. In addition, some chip manufacturers can't wait to balance supply and demand by expanding production capacity, and hope to further seize market share. Among them, Sanan Optoelectronics added 10 billion yuan to impact the global production capacity, invested in the construction of LED blue, green light extension, chip research and development and manufacturing industrialization project total scale of 200 MOCVD (based on 2 inches and 54 pieces as the base). Huacan Optoelectronics announced on April 18 that it plans to invest 1.18 billion yuan to build LED phase III project expansion epitaxial wafer production capacity; Aoyang Shunchang announced on June 18 that it plans to invest 1 billion yuan to build LED epitaxial wafer and chip industrialization project (2 The new monthly production capacity of LED chips is expected to reach 90,000 pieces at the end of the year; Dehao Runda is building a base in Yangzhou and Yangzhou, and the production capacity of new LED chips will be three times; the company will be announced on July 24th. Subsidy, it is planned to invest 5 billion yuan to build LED blue-green optical epitaxial wafer, chip and lighting industry projects.