China’s HVDC gearbox is made in China.

  On November 27th, the first converter transformer with domestic on-load tap changer independently developed by China was installed in the key project of West-to-East Power Transmission in Conghua, Guangzhou — — Xiluodu DC project has been successfully put into operation from West Converter Station.

The picture shows the Xiluodu DC project from the west converter station. (Photo courtesy of the interviewee)

  "The on-load tap-changer of converter transformer has achieved a technical breakthrough from scratch and realized the complete localization of industrial chains such as components, which indicates that China has broken through the constraints of this key core technology of high-end power equipment." Feng Wei, deputy general manager of Biotechnology Department of China Southern Power Grid EHV Company, said.

  China’s eastern and western parts span thousands of kilometers, and the power transmission from west to east needs a long-distance, large-capacity and high-voltage DC project for power transmission. The converter transformer, which weighs more than 300 tons, is used in both the power transmission end and the power reception end of the project. The on-load tap-changer of converter transformer is like an automatic gearbox of a car, and it is used to adjust the voltage, load and current.

  On-load tap changer is a highly complex and precise equipment. According to Deng Jun, a senior technical expert of China Southern Power Grid EHV Company, the on-load tap changer of converter transformer has more than 1,000 parts, and the switching times are very frequent, reaching more than 6,000 times a year. One switching includes nine processes, each of which involves the precise coordination of more than 400 parts, and the timing coordination of each process is millisecond, and the multi-field coupling of electricity, heat and force is involved in the action process.

The picture shows the installation site of on-load tap changer of converter transformer. (Photo courtesy of the interviewee)

  Due to the extremely high reliability requirements and difficult manufacturing, this technology has always been in the hands of a few foreign manufacturers, and equipment maintenance is also limited. In case of failure, only imported products of the same model can be replaced, and the order cycle takes 3 to 4 months, which brings challenges to the safety of power operation.

  Liu Xiangqiang, deputy general manager of China Southern Power Grid EHV Company, told the reporter that after more than two years of hard work, the research team jointly established by China Southern Power Grid EHV Company and upstream and downstream enterprises in the industrial chain has successfully developed a large-capacity converter transformer on-load tap changer with rated capacity of 6000kVA, maximum voltage of 6,000 V and maximum rated current of 1,300 A, and realized the domestic manufacturing of the whole chain of "raw materials-components-complete machine".

The picture shows the installation site of on-load tap changer of converter transformer. (Photo courtesy of the interviewee)

  The successful operation of this product will not only help to upgrade the industrial chain of high-end electrical equipment in China, but also save costs for engineering construction. According to Liu Xiangqiang, only from the equipment cost estimation, the on-load tap-changer of domestic converter transformer can save nearly 40 million yuan for a new UHVDC transmission project. (Reporter Wu Tao)

10 kinds of sanitary napkins are compared and tested, and the expensive ones must be good?

China Quality News Network News Sanitary napkins are close-fitting products that all women will use, and their hygiene and safety are particularly important. There are many kinds of sanitary napkins circulating in the market, and everyone often falls into difficulty in choosing. For the sake of the health of female users, understanding the actual situation of the quality and safety of sanitary napkins in the circulation field, and allowing female consumers to obtain more objective and practical product information, Yuyao Consumer Protection Committee of Zhejiang Province hereby conducts a comparative test of sanitary napkins. Let’s take a look at the test process.

In mid-February, Yuyao Consumer Protection Committee and Yuyao Market Supervision Bureau carried out random inspection of sanitary napkin products in several supermarkets within their jurisdiction. This time, 10 batches of sanitary napkins with different brands and different prices were sampled.

1678184205422.png

At the same time, during the sampling process, the staff of the Consumer Protection Committee conducted a questionnaire survey on women’s products to the citizens who came to the supermarket to purchase, covering occupations, preferences, ways of purchase, original intention of purchase, etc. Many citizens actively participated and stopped to fill in the information according to their usual purchase preferences.

image.png

The sanitary napkins sampled this time are entrusted to a third-party testing organization for professional testing. The testing items include total length deviation, strip quality deviation, water absorption rate, absorption speed, pH, formaldehyde content, migratory fluorescent substances, total bacterial colonies, coliforms, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococcus, total fungal colonies, etc.

image.png

Recently, the third-party testing organization has completed the testing of these 10 batches of sanitary napkins. Let’s take a look at the test results.

First of all, let’s take a family photo of 10 different brands of sanitary napkins (pads):

image.png

image.png

image.png

image.png

image.png

image.png

image.png

image.png

According to the test results, all the above 10 types of sanitary napkins are qualified, and the absorption rate of high-priced products is not necessarily high, and the water absorption rate of low-priced products is not necessarily slow.

According to the questionnaire survey, consumers will pay more attention to many factors such as price, brand, absorption and comfort when purchasing sanitary napkins, and products with high cost performance and good comfort are more favored by consumers.

Consumer tips

(A) look at the packaging, more inspection.

When purchasing goods, we should carefully check the product information such as factory name, address, hygiene license number, anti-counterfeiting mark, production date, shelf life, etc. on the outer packaging to identify whether the license number is valid or not. Try to buy sanitary napkins with independent packaging, or with zipper seals or sealing strips sealed for many times to avoid being contaminated during storage, and try to choose sanitary napkins produced recently.

(2) Choose word of mouth and trust the brand.

It is suggested that consumers should purchase sanitary napkins through formal channels, such as large supermarkets and well-known online shopping platforms. Consumers are advised to choose brand sanitary napkins with good reputation and high reputation, especially sanitary napkins produced by enterprises with strict quality management system and safety certificates.

(3) Look at the standard and distinguish it skillfully.

Special reminder: the license number of sanitary napkins mainly includes the medical machine name and the common elimination name. Medical mechanical sanitary napkins have higher requirements on safety and hygiene; Considering the safety and comfort during normal menstrual period, it is recommended to choose ordinary font size; Women with allergic constitution should use medical sanitary napkins with caution.

(4) frequent replacement and good preservation.

It is best to wash your hands before changing sanitary products. The best time to change sanitary products during menstruation is 2-3 hours. If you don’t change them for a long time, it will easily lead to bacterial infection. Attention should be paid to avoid moisture during storage and whether it exceeds the expiration date. Sanitary napkins are sterilized by high temperature disinfection, and there is no aseptic guarantee after the expiration date. Consumers are advised not to buy too many sanitary napkins at a time, and it is best to buy them immediately.(Source: Yuyao Market Supervision Bureau)

Wang Zuxian’s law number is "Chaoxi"? Add fans to reveal the specific address of his monk


This suspected monk picture spread all over the Internet yesterday.


  Over the past few days, the news that Wang Zuxian had cut her hair as a nun has made entertainment headlines. Cha Xiaoxin confirmed the news to the media the day before yesterday, but Wang Zuxian’s friends and family members said they were unaware of the matter. On the Internet, Wang Zuxian’s fans from Canada revealed the specific address of her monk, and even called Wang Zuxian’s name "Chaoxi".


  In an interview with the media, a well-known Hong Kong radio host, Cha Xiaoxin, confirmed the news that Wang Zuxian became a nun. She said that she heard about it from a senior and had not been in contact with Wang Zuxian. "This senior has a very good relationship with Zuxian, so I think the news should be true."


  The person who first published the news in the Hong Kong newspaper was Du Huidong. According to the Hong Kong media, this person is a very senior film company public relations. He has been with Wang Zuxian for many years and is familiar with each other.


  However, by the time of the press deadline, Wang Zuxian’s family in Taiwan said that they had not contacted her, so they could not confirm the news. Wang Zuxian’s godfather, veteran sports journalist Fu Daren, expressed his surprise at the news, saying that "even her father did not know". At present, the only family member who has kept in touch with Wang Zuxian is her mother. Wang’s mother told Taiwanese media through friends that she spoke to Xiao Xian on the phone a week ago, and the other party is still in good condition. She said that she knew that Xiao Xian was practicing at home, and she has not been contacted yet. Wang Zuxian’s eldest brother also said that he did not know.


  Yesterday, many media reports mentioned that the reason for Wang Zuxian’s determination to become a monk was the marriage news between Qi Qin and Xiao Qiang, which confused Qi Qin. Yesterday, he declined many media interviews, saying only that this matter has nothing to do with the relationship between the two, and this is Wang Zuxian’s own choice. In addition, Yang Fan, the director of "Dream in the Garden" who once invited Wang Zuxian to return, also said that he had not contacted Wang Zuxian for a long time, but he said that the outside world should not be too surprised, and there is no need to use worldly ideas to measure her choice. Xu Feng, who signed a contract before Wang Zuxian quit the film industry, and Shi Nansheng, who has worked on many films in the "Ghost of a Thousand Girls" series, both said that they do not know whether the rumors are true or false, but respect her choice.


  Once the news of Wang Zuxian becoming a monk came out, it became a hot topic on online forums. Some netizens expressed their firm disbelief in the news, and more people expressed regret for the beauty who became a monk. Some people wrote an article "From now on to the green lantern, don’t ask about the fate of this life", and many movie fans expressed their support and respect for the choice of idols.


  In addition, some netizens revealed the "exact address of Xiaoxian’s monk": "Guanyin Temple on STEVESTON HWY in RICHMOND, the address is from the US-Canada border and travels north along Hwy 99. After passing the Massey Tunnel, choose Steveston Hwy /Exit 32 (Exit 23), turn left (west) and enter Steveston Hwy. Guanyin Temple is located on Steveston Hwy, between No. 3 and No. 4 Roads, about 30 minutes." Some netizens reported that Wang Zuxian’s name was "Chaoxi". Since the Internet Protocol Address of the netizens in the report shows that it is Canada, and the address is very detailed, many netizens believe that the news is more reliable. Reporter, Pan Yuan

  Related links:



  • Wang Zuxian denied the rumors of ordination, relatives and friends said it was a chat joke was taken seriously 2009-07-09

  • Wang Zuxian’s monk photos are blurred, and the whistleblower’s reputation is poor (Figure) 2009-07-09

  • Cha Xiaoxin clarifies the rumors: I have not confirmed Wang Zuxian monk (picture) 2009-07-09

  • Relatives and friends confirmed that Wang Zuxian did cut his hair, and Qi Qin responded: Not surprised 2009-07-08