TAL type high voltage wave filtering capacitor devices (hereby called devices) are mainly used in fields such as iron & steel, metallurgy, chemical industry. By absorbing the harmonic current produced by the harmonic source, it can improve function of power quality of the system. The device belongs to “passive type” filtering device, mainly composed of filter capacitor, filter reactor and resistor and after precise adjustment, it can make the high order harmonic current at a certain frequency of the filter appear low-impedance, thus absorbing the local harmonic current.

In operation, the device is connected with the harmonic wave in parallel. Except for the function of filtering harmonic wave, improving power energy quality, it can also deliver capacitive reactive power to the system, adjusting voltage of the network, reducing loss the line and improving availability factor of the power supply equipments.

Zero’leakage:  all insulators of oil-type product inside the capacitor bank generally apply rolling contact casing pipe and no leakage was guaranteed.

Lifelong anti-corrosion: material of enclosure of the attachments is stainless steel. The equipment assembly frame is made of aluminum alloy sections.

It is assembled in building blocks way. It is designed and delivered in a modularized way, and can be immediately used on site.

It is assembled in building blocks way. It is designed and delivered in a modularized way, and can be immediately used on site.

Design accuracy: site data testing is continuously executing before design and effect testing after operation, guaranteeing precision of the product design.

TAL type high voltage wave filtering capacitor devices belongs to the passive filter category, mainly composed of filter capacitor and filter reactor, which are properly combined into LC filter devices. Except for the filtering function, the filter even has reactive power compensation function. LC filter devices mainly include single-tuned-filter, double-tuned-filter, high-pass filter, C type filter, etc.

In practical application, several groups of filters shall be designed as per characteristics, volume and status of reactive power of the harmonic current. Each group of filter matching with the divided group of a certain harmonic wave and filter shall be calculated precisely, making sure to meet both the requirement of filtering harmonic wave and the requirement of reactive power compensation. Meanwhile, harmonic amplification caused by parallel resonance from the filter and the system impedance under an entire frequency condition. Design software developed by our company can provide precise filtering plan fast and reasonably according to concrete characteristics of each user.

Our products have covered a whole series of 3kV～110kV voltage grades and we can manufacture customized products rated as special voltage grade and special frequency as per demand of the user. 110kv directly linked products have been applied since 2003. Currently, our company has become suppliers who can provide 110kv directly linked products operating the longest time in our country and operating maximally in numbers.

Filter reactor and filter capacitor used in the device are both produced by our company and they can be followed in the whole process through barcode system. The product capacity deviation is strictly controlled to guarantee accuracy of the LC tune.

High voltage filter capacitor devices are mainly composed of components such as disconnecting switch (earthing switch), discharging coil, discharging coil, dry type hollow filter reactor, high voltage filter capacitor, current transformer, jet type fuse breaker (selective) and bus, etc.

Erection method of the device is mainly depends on size of the erection field, outdoor or indoor. Its reactor can be erected in the front part of in the back part. When erecting in the front part, dynamics and thermal stability of the reactor shall be strictly checked. According to the erection way of the reactor, they can be erected in three-phase parallel way or three-phase stacking way and it is advised to apply parallel erection way. Due to relatively large mutual inductance of the air-core reactor, a certain distance shall be guaranteed in erection. Moreover, no metal material or other magnetic conductive material which constitute circuit in the surrounding area is allowed. Erection way of the capacitor either be in a vertical way or horizontal way for convenience of line connecting.

Switching way of the devices can be manually or automatically. Generally, user can cut off several branches by using manual isolating knives as per the loading condition, thus to adjust the capacity. But operation of isolating knives can only be done under the condition of cutting off the erection. Cutting sequence of the filter branches shall strictly follow the operation rules. In addition, specialized controlling devices shall be applied to check the condition of the bus voltage and idle work condition. Automatic capacity adjustment under loading condition can be achieved through controlling switching of the branch high voltage contactor or breaker; capacity of each gear can be divided according to the load compensation requirement.

110kv high voltage filter capacitor device

In the table：1——disconnecting switch; 2——ZnO lightning protector；3—— current transformer; 4——bus; 5—— filter reactor; 6 —— enclosure; 7—— pillar insulator；8—— high voltage filter capacitor units; 9—— frame.

1. Capacitance deviation: phase capacitance deviation shall be 0~5% of the rated value of the devices; ratio of the maximum capacitance and minimum capacitance between any two line terminals shall be no more than 1.005; ratio of the maximum capacitance and minimum capacitance in various series connecting section shall be no more than 1.01; ratio of the maximum capacitance and minimum capacitance between arms of each phase shall be no more than 1.01.

2. The device can be operated long term under 1.1 times of rated voltage value or 1.35 times of rated current value condition.

3. Current overload capacity: as the practical capacitance can be 1.15CN, the maximum current can be 1.5IN. And those current factors are results considering cooperative function of both the harmonic wave and 1.10 UN overvoltages.

4. Adjusting scope of the filter reactor: continuously adjustable in the range of -5%~+5% and they can be customized according to special requirements.

5. Corrosion resistance: enclosure of filtering capacitor unit applies stainless steel and is treated with painting process; as for devices in the open air, the internal frame all applies aluminum alloy; the enclosure applies stainless steel material while other exposed parts and fasteners all apply reliable anti-corrosion measures to prevent rusting of the devices.