High voltage filter set

Main purpose and scope
of application With the large-scale use of various converter devices, frequency converters, electric arc furnaces and other non-linear electrical equipment, the harmonic currents often exceed the allowable values of relevant national standards and seriously affect the power quality of the power grid.
The TAL type high-voltage filter set is a "passive" filter device, that is, a filter reactor and a high-voltage filter capacitor are properly combined. After precise tuning, the filter branch forms a low-impedance channel for each high-order harmonic, so that most of the corresponding harmonic current flows into the filter, so as to filter out the harmonic current and reduce the harmonic voltage distortion rate of the common access point. the goal of. In addition. It also provides reactive power compensation to improve the power factor.
This device is mainly installed on the side of the 6kV, 10kV, and 35kV busbars. It is suitable for places with high harmonic currents such as power systems, metallurgy, steel, aluminum plants, petroleum, chemical, electrified railways, papermaking, shipbuilding, etc., such as (Figure 1) The wiring schematic diagram of the 10kV filter (compensation) device system in a steel plant.
This product complies with: industry standard JB/T10931-2010 (our company is the main drafting unit of this standard)

Model and meaning

Working conditions
1. Altitude: ≤1000m;
2. Ambient temperature: -25°C~+45°C;
3. Relative humidity: ≤90% (at 20°C);
4. The installation site should be free of corrosion and damage to insulation There should be no explosive or conductive dust, strong vibration and shock, and no serious molds in the presence of gas and steam.

Main technical parameters
1. Rated voltage: 6kV, 10kV, 35kV, 110kV;
2. Working frequency: 50Hz;
3. Rated capacity: 50kvar~30000kvar;
4. Tuning frequency: 3 times, 5 times, 7 times, 11 times, 13 Times and above;
5. Working mode: continuous work, automatic/manual.

Product features
1. The filter capacitor is composed of multiple capacitor units, and a single filter capacitor adopts a single-phase structure for phase tuning. The filter capacitor adopts a full-film composite medium, which has the characteristics of small size, low loss and low operating temperature;
2. The filter reactor adopts a single-phase dry hollow structure, and the inductance value is continuously adjustable by ±5%, and the reactor can adopt "-" The glyph or "品" glyph is installed horizontally;
3. The structure of the filter set is flexible and can be cabinet or frame type. When the frame structure is adopted, the entire device is isolated by a fence;
4. The filter device is designed to be manual and automatic. The control method makes the operation simple and safe;
5. The computer integrated automatic protection device is used to track system changes in real time, so that the equipment can operate safely and reliably;
6. According to the user's system requirements, it can effectively filter the high-order harmonics of the power grid, compensate for reactive power, and improve Voltage quality.

Ordering instructions
1. Power system diagram;
2. Harmonic test check point (PCC) point;
3. Maximum and minimum short-circuit capacity of PCC point bus;
4. Main transformer capacity, rated primary and secondary voltage and impedance voltage percentage;
5. The connection type and length of the main transformer to each load (for calculating the line impedance);
6. If there is capacitor compensation, it needs to provide: installation location, capacity, rated voltage, connection method, reactance rate, etc.;
7. PCC point The agreement power consumption squeezes the proportion of the installed capacity of the power supply system (if the harmonic current limit such as the PCC point is allowed to be directly provided);
8. Background harmonic data (also can be tested on site by our side);
9. Harmonic current generation: if The project has been put into production, and our company can send personnel to the site for direct testing; if it has not been put into production, we can provide detailed parameters of all harmonic current generating equipment, such as the number of rectifier pulses, the type of power rectification, whether it is thyristor rectifier or diode rectifier, etc. The equipment factory can also directly provide the amount of harmonic current generation;
10. Reactive power demand or provide monthly power average value, reactive power average value and power factor after compensation;
11. Priority should be given to the demand side when selecting The data can be optimized according to the actual situation. If there are special requirements, the supplier and the demander can negotiate separately.