High Voltage Ceramic Capacitor for Power Grid
With the development of the smart grid, the excellent performance of the high voltage ceramic capacitors win more and more attention of the technical engineers. Since the high voltage metalized film capacitors have much defects in various aspects voltage and lifetime, people began to look to cost higher, but the performance is more excellent ceramic material. AnXon Electronics in this regard have been walking in front of peers. Its latest N3500 series of products, in all aspects of temperature, voltage, PD, current and lifetime are met the needs of customers, has been highly concerned about the buyers. It is believed that in the near future, N3500 material of high voltage ceramic capacitors will occupy most of the market's power sector.
In terms of power applications, electronic voltage transformers, capacitive voltage dividers, filters, carrier, surge arresters, circuit breakers, etc. must be used in a large number of high voltage capacitors. However, the traditional usage is metalized film capacitors. Since the film capacitor itself limitations, power lines higher failure rate, short life of the product, to the power companies to bring a lot of. Excellent performance ceramic materials is the best choice.
While there are a number of strong ceramic capacitors advantages, but the development is not fast. As the market began to shift EHV PD UHF ultra small ceramic capacitors, each enterprise development speed a little short lag. Currently, the development of high voltage areas with no the needs of the market, especially in the field of large smart grid market, the development of ceramic capacitors is a little surprise.
Overview of smart grid technical requirements capacitors, nothing more than the following:
First, the requirements of the ceramic capacitor voltage characteristics to meet the needs. At this point, many companies can't do because lack of real research and development capabilities of the manufacturers. They may just processing sectors only, can't meet customer demands .
Second, the partial discharge requirements. At present, PD can do less than 10PC manufacturers are not many. Network equipment required is less than 5PC, which made many manufacturers stop looking. AnXon capacitors can be done less than 1PC at 36KV AC voltage.
Again, power equipment in the circuit breaker, capacitive voltage divider, voltage transformers and other products, the capacitor temperature coefficient is very strict, these electrical equipment requirements for the temperature change rate is less than 5%. At present, enterprises are also use N4700 for the high voltage ceramic capacitors. However, the rate of temperature change of N4700 is 28%, far greater than the expectations of guests. Therefore, the choice of new materials is an inevitable way.
So, N3500 material is a better choice. According to theoretical data, at 50 ℃, the temperature change rate of 2.5% but will differ from the actual application. Since the ceramic disc will eventually be packaged in epoxy resin, which will form an internal stress, temperature change rate of the capacitor will decrease, the actual temperature change rate of about 1.5%. In other words, it has been fully meet the customer's design concept .
Currently AnXon electronic 100KV 500PF, 100KV 1000PF, 100KV 3300PF, 60KV 4000PF verification by foreign customers, the impulse voltage reaches 150KV, 125KV, 95KV requirements, the withstand voltage over 80KVrms, partial discharge is less than 5PC. Grid customers are welcome to sample order.
