Application of supercapacitor in FTU

Supercapacitors have been gradually selected by the power industry due to their high reliability of discharge capacity. The power automation application represented by FTU has been used and implemented in many industry-leading enterprises. With the gradual deepening of the understanding of supercapacitors in the power industry, the supercapacitor DC power supply scheme has been completely mature and has been tested in practical applications.

BIGCAP super capacitors are mainly used as the main technical features of DC power supply:

Ultra-low internal resistance, high power density, strong ability to output large current, ensure the reliability of opening and closing.

Long charge-discharge cycle life (up to 1 million times) and 10 years of normal service life.

The wide temperature operating range can reach -40°C to +85°C.

The charging time is short, and the charging can be completed within a few seconds to a few minutes.

Small size, light weight, convenient installation, high reliability, long-term use without protection.

Supercapacitor materials are safe, non-toxic, green and easy to recycle.

Suitable supercapacitor modules can be customized according to customer application requirements .

In the power system, the terminal station and the small station are generally systems that only supply the opening and closing current of the switch, and the super capacitor module can be directly used as the power supply. The super capacitor group only leads to the positive and negative terminals, and the external charging unit (capacitor charging It is relatively simple, it can be charged with a small current, it can also be charged quickly with a large current, and it can even be short-circuited and discharged without affecting its function and life). The positive and negative terminals can be directly connected to the input terminals of the switch. In the power system, the switch of the relay is selected, and the current of opening and closing is very small. Generally, there are several kinds of DC switches: in the terminal station and small station, the DC power supply generally only supplies the opening and closing current of the switch, and there is no other load; in the center In addition to the opening and closing of the support switch, the station generally needs to keep the power distribution terminal and communication module running for at least 2-15 minutes. According to the DC power supply requirements of a certain power system, the direct selection capacity is 29.7V 9F, 29.7V 36F or 54V 5.0F Such as supercapacitor modules , it can satisfy the FTU two-remote terminal and three-remote terminal, and the opening operation can keep the power distribution terminal and communication module running for at least 15 minutes.

Ability to complete the following skill indicators:

Make sure to operate the "open-close-open" 3 times, and keep the power distribution terminal and communication module running for at least 15 minutes, and the service life of the super capacitor is ≥ 6 years.

Terminal power consumption (including communication module): ≤12W (maximum can be calculated as 15W)

Temperature requirements: -40 degrees ~ +70 degrees

Module voltage level: 29.7V

Module structure and volume can be customized according to requirements

In the power system, multiple supercapacitors are used in series to raise the required voltage to form a unified module. The internal balance design of high-reliability electronic equipment is used to ensure that the operating voltage of each capacitor is within its extra voltage, and a high-reliability supercapacitor module is obtained. Compared with ordinary capacitors , supercapacitors have extremely high energy density and can also provide high current output power supply, so they are excellent energy storage devices for various short-term DC power supply switching systems.

Supercapacitor is a kind of power equipment with high reliability and longevity. Under normal conditions, it can have a cycle life of more than 500,000 times, an operating life of more than 10 years, and at least 8 years in a power system that requires high reliability. Considering the above lifespan, the device has high reliability, strong power characteristics, and good high and low temperature characteristics. It can work normally under conditions of -40 to +85 °C, and is extremely suitable for use in power systems under the conditions of great temperature differences across my country. .

In the past, the battery was used as the DC power supply, but the battery often required protection. It has been proved that the battery that is completely free of protection is difficult to meet the requirements of long-term use, especially in the power control link where there are usually not too many charging and discharging links. , the battery is in the state of complete floating charge for a long time, and the damage is very fast, while the super capacitor can be in the state of high voltage charging or low voltage power loss for a long time, without too much impact on the function, it is a completely protection-free equipment, and does not need to be charged and discharged regularly. Protection, because the battery is usually in the state of charging and non-discharging, even if the internal plate has been deteriorated, its terminal voltage is still in a similar state as the battery, it is difficult to judge and replace it early, and once a slightly larger current is required to discharge, its The terminal voltage drops immediately, and the power cannot be released, and the energy cannot be supplied for the use of the DC link. This often makes the battery good when it is not usually used. The opening and closing cannot be performed reliably and stably, and the terminal voltage of the supercapacitor directly reflects its internal power storage state. Even if an unexpected failure occurs, the voltage can be detected to reflect its state, thus making the opening and closing more reliable and stable. Generally, the use time of batteries does not exceed 5 years. In practice, due to the difficulty of complete protection, and the great influence of outdoor high and low temperature, the batteries often start to show damage in about half a year, and show large quantities in about 2 years. The super capacitor has a wide temperature operating range of -40℃~+85℃, long service life, under normal conditions, it can have a life of more than 10 years, and the low-voltage service life under the same conditions will be longer. long.