Two breakthroughs in the development of power capacitor industry in China

Although China's capacitor technology has been improved to a certain extent, the problems of product structure and weak comprehensive technical strength of power capacitor manufacturing enterprises are still not well solved. After years of development, China's power capacitor manufacturing technology, equipment and technology have entered the world's advanced ranks. However, due to the disconnection between the great development of manufacturing technology and the development of power system in China's power capacitor manufacturing enterprises, there are some problems such as improper connection with the main line, improper coordination of protection, improper selection of accessories and improper coordination of parameters in large capacity shunt compensation capacitor devices for 500kV and 220kV substations.

In recent years, the State Grid Corporation of China (SGCC) has implemented centralized scale bidding to help the power capacitor industry solve the problem of chaotic configuration of capacitor devices, and determine the development direction for the power capacitor industry. In addition, the standard bidding corrected the problem of high wiring error rate of large capacity capacitor bank, solved the problem of relay protection coordination and setting calculation of large capacity capacitor bank, and the problem of excessive blasting energy of large capacity capacitor bank. According to the operation statistics of power system, with the solution of these problems, the operation reliability of reactive power compensation devices has been improved year by year, and the explosion and fire accidents of large capacitor banks have been significantly reduced. However, although China's capacitor technology has been improved to a certain extent, the problems of product structure and weak comprehensive technical strength of power capacitor manufacturers are still not well solved.

Training comprehensive technical talents

With the increase of the transmission capacity of power grid, the requirement for the capacity of capacitor banks is also increasing, and the related harmonic problems, noise problems, matching equipment problems, safety and reliability problems are becoming more and more prominent. Therefore, it will be the most economical and reasonable way to comprehensively consider the production, design and optimize the solution to these problems. Otherwise, the cost of human, material and financial resources is far greater than the cost of design and manufacturing period. Moreover, the effect of solving problems is far worse than that of design and manufacturing. Therefore, the most effective energy-saving measure is to consider the influence of various factors in the design stage, design and manufacture in a targeted way, and minimize the resource consumption. To achieve this, the technical personnel in the manufacturing industry should not only be familiar with the manufacturing technology of their own products, but also be familiar with the use conditions of the products, the operation requirements of the power system, the impact of equipment access on the surrounding environment, and the impact of other equipment on their own products. Only in this way can the designed and manufactured products achieve good compatibility with the environment, and get good operation safety and reliability.

At present, there is a serious lack of comprehensive technical talents in power capacitor manufacturing enterprises, which leads to the phenomenon that although the power capacitor manufacturing enterprises are equipped with world-class plants and equipment, their products are not up to the world advanced level. Therefore, training comprehensive technical personnel is one of the development strategies of power capacitor production enterprises.

Develop diversified products

The scale of manufacturing enterprises is relatively small and the product structure is single, which is a common phenomenon in China's power capacitor industry. In fact, reactive power balance is one of the goals of good operation of power system. Around the realization of this goal, it involves the distribution and control of reactive power flow, the adjustment and control of node voltage, the switching and control of reactive power compensation equipment, the switching and control of load size and other aspects of technology and equipment, and the power capacitor device is only one of the series of reactive power compensation equipment. It can be predicted that, as another kind of reactive power compensation device, power electronic reactive power compensation device, in the current situation of rapid development, the reactive power compensation effect and function will be stronger and stronger, and the price will be lower and lower. This impact on the capacitor industry will not last long. Therefore, the power capacitor manufacturing enterprises should pay close attention to the structural adjustment of products and transfer to new products under the current good market atmosphere. At the same time, speeding up the technical reserve is the best guarantee for the long-term and healthy development of reactive power compensation technology. It will promote the development of capacitor.