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Current situation and development prospect of bidding for high voltage AC circuit breakers in 2017
Addtime:2018-02-28 15:55:37

Bidding for high voltage AC circuit breakers in China in 2017


High voltage AC circuit breaker is the main power control device of substation. It has the characteristic of arc extinguishing. When the system is running normally, it can cut off and connect the line and the load current of all kinds of electrical equipment. When the system fails, it is combined with relay protection to cut off the fault current quickly in order to prevent the expansion of the accident range. . Therefore, the operation of high voltage AC circuit breaker directly affects the safe operation of power system.


According to the statistics of the 2018-2023 year forecast of market demand forecast and the investment strategic planning of China high voltage switch manufacturing industry, published by the prospective industry research institute, the national Power Grid Corp carried out a total of 5 batches of centralized bidding procurement by 2017, and a total of 5387 circuit breakers were tendering. Among them, second batches of tenders were the largest, with 2257 units, followed by third batches of 1050 units, and the smallest bidding group was fourth batches, 483 units.


Figure 1:2017 national Power Grid Corp substation project centralized bidding - the size of each batch of circuit breakers (unit: Taiwan)

Source of data: collation of prospective Industrial Research Institute


From the voltage level, the 5 batches of 35kV circuit breakers were bidding for 2158 units, accounting for the largest proportion, accounting for 40. 06%, followed by 110kV circuit breaker, a total of 1361, accounting for 25. 26%.


Figure 2:2017 bidding statistics for each batch of circuit breakers of the national Power Grid Corp (unit: Taiwan)

Source of data: collation of prospective Industrial Research Institute


Judging from the bid winning enterprises, the highest bid share of the first 5 batches of circuit breakers in 2017 was Shandong Tai Kai high voltage switchgear Co. Ltd., occupying 26. 72%, followed by Jiangsu Province High Voltage Electric Appliance Co., Ltd., occupying 25. 15%.


Figure 3:2017 the winning share of the first 5 batches of circuit breaker enterprises in the State Grid (unit:%)

Source of data: collation of prospective Industrial Research Institute


Forecast of China's high voltage AC circuit breakers in 2023


From the international market, the advanced industrial countries in the world are looking at the development prospects and potential benefits of the intelligent high voltage electrical appliances in the field of high voltage power system, increasing the input and development of the research, compared with the typical ABB CAT, the circuit breaker with artificial intelligence technology, as discussed earlier, To some extent, the controlled operation of the circuit breaker is realized, and the photoelectric current sensor and voltage sensor introduced by ABB company have replaced the traditional electromagnetic current transformer and voltage transformer in the field of high voltage, which solves the difficult problem of sensing technology in the intelligent high voltage electrical equipment. At present, a large number of application of digital signal transmission technology greatly alleviates the influence degree of interference in the signal transmission. These high-tech applications have created a good condition for the development of intelligent circuit breaker technology.


At home, there are more than 200 enterprises above the scale of high voltage AC SF6 circuit breaker and high voltage AC vacuum circuit breaker in our country. In 2016, the output of 126kV and above voltage grade high voltage AC circuit breakers in our country reached 10450. In addition, the sales revenue statistics of these enterprises showed that the total sales income of these enterprises was 800 A hundred million yuan.


The prospective Industrial Research Institute is expected that the output of high voltage AC circuit breakers in China's 126kV and above voltage grades will increase by about 5% in the past 2017-2022 years. By 2022, the output will break through 14 thousand.