Although the capacitor technology in China has improved to a certain extent, the problems of product structure and weak comprehensive technical strength of power capacitor manufacturing enterprises have still not been well solved. After years of development, the manufacturing process, equipment and technology of power capacitors in China have entered the advanced ranks in the world. However, due to the disconnection between the great development of manufacturing technology of power capacitor manufacturing enterprises in China and the development of power systems, this has led to problems such as improper main wiring, improper protection coordination, and improper selection of accessories and parameter coordination in large-capacity shunt compensation capacitor devices used in 500 kV and 220 kV substations.

In recent years, the State Grid Corporation of China has implemented centralized large-scale bidding and tendering, which has helped the power capacitor industry solve the problem of configuration chaos of capacitor devices and determined the development direction for the power capacitor industry. In addition, standardized bidding has corrected the problem of excessively high wiring error rate of large-capacity capacitor banks, solved the problems of relay protection coordination and setting calculation of large capacitor banks, and the problem of excessive blasting energy of large capacitor banks. Judging from the operation statistics of the power system, with the solution of these problems, the operational reliability of reactive power compensation devices has also increased year by year, and the explosion and fire accidents of large capacitor banks have shown a significant downward trend. However, although the capacitor technology in China has improved to a certain extent, the problems of product structure and weak comprehensive technical strength of power capacitor manufacturing enterprises have still not been well solved.

Cultivating Comprehensive Technical Talents

The increase in the transmission capacity of power grids requires an increase in the capacity of capacitor banks. Associated harmonic problems, noise problems, supporting equipment problems, safety and reliability issues, etc. have become increasingly prominent. Therefore, comprehensively considering production and design and optimally solving these problems will be the most economical and reasonable approach. Otherwise, when problems occur during product operation and then the product is retrofitted, the costs in terms of human resources, materials, and finances are much higher than the cost input during the design and manufacturing stage. Moreover, the effect of solving the problems is also much worse than at the design and manufacturing stage. Therefore, this concept of comprehensively considering the influence of various factors at the design stage, designing and manufacturing targeted, and minimizing resource consumption is the most effective energy-saving measure. To achieve this, technicians in the manufacturing industry must not only be familiar with the manufacturing technology of their own products but also must be familiar with the usage conditions of the products, the operational requirements of the power system, the impact on the surrounding environment after the equipment is connected, the impact of other equipment on their own products, and other aspects of technology. Only in this way can the designed and manufactured products achieve a good compatible state with the environment and obtain good operational safety and reliability.

At present, power capacitor manufacturing enterprises are seriously lacking comprehensive technical talents, resulting in an asynchronous phenomenon where although they are equipped with world-class factories and equipment, the products they launch have not reached the world's advanced level. Therefore, cultivating comprehensive technical talents is one of the development strategies of current power capacitor manufacturing enterprises.

Developing Diversified Products

Relatively small manufacturing enterprise scale and single product structure are common phenomena in China's power capacitor industry at present. In fact, reactive power balance is one of the goals of good operation of power systems. To achieve this goal, it involves many aspects of technology and equipment such as the distribution and control of reactive power flow, the adjustment and control of node voltages, the switching and control of reactive power compensation equipment, the switching and control of load size, etc., and power capacitor devices are only one of the series of reactive power compensation equipment. It can be predicted that as another type of device for reactive power compensation - power electronic reactive power compensation devices, under the current rapid development trend, the reactive power compensation effect and function will become stronger and stronger, and the price will also become lower and lower. This will not take long to have an impact on the capacitor industry. Therefore, power capacitor manufacturing enterprises should seize the opportunity to carry out product structural adjustment and shift to new product directions under the current favorable market atmosphere. At the same time, accelerating technological reserves is also the best guarantee for the long-term and healthy development of reactive power compensation technology. It will surely promote the development of capacitors.