1. The reactor in the role of high voltage distribution system, power system adopted in the reactor, reactor in series and parallel reactor are so common. Series reactor is mainly used to limit short circuit current, also has in the filter with series or parallel capacitor is used to limit the higher harmonic in the power grid. 220 kv, 110 kv, 35 kv and 10 kv power grid in the reactor was used to absorb the cable line charge capacitive reactive power. Can adjust the number of series reactor to adjust the operating voltage.
Two basic function
1.to reduce the flow ratio and flow frequency capacitor group, to choose form a complete set of equipment and the protection of capacitor. Should be based on GB50227 standards will flow limit below 10 times the rated current of the capacitor, harmonic amplification (harmonic of traction), in order not to happen for volt-ampere characteristics of serial reactor for linear as far as possible. Network harmonic is small, use limit flow reactor; Reactance rate from 0.1% to about 0.1% : flow can be limited to 10 times the rated current, so as to reduce the energy loss of the reactor, and the reactor is of small volume, cover an area of an area small, easy to install in the capacitor enclosure. In this reactor is very economic, and energy saving.
2, series filter reactor, the reactor impedance and capacitor capacitive reactance tuning after all, one harmonic of ac filter. Filter to a higher harmonic, and reduce the harmonic voltage on the bus, make the line does not exist on the higher harmonic current, improve the quality of the grid voltage.
Filter reactor tuning degree:
XL = L = 1 / n2XC omega = AXC
Type in A - tuning degree (%)
XL - reactance value (Ω)
XC - capacitive reactance value (Ω)
N - harmonic frequency
L - inductance (mu H)
Omega - 314
According to the degree of tuning reactor configuration, can satisfy every harmonic filtering.
3. reactor, to restrain the harmonics is a precondition to clear the grid harmonic situation, find out the surrounding YongDianHu presence of large rectifier devices, electric arc, can produce harmonic equipment such as steel, have poor performance good high voltage transformer and high voltage motor, as far as possible the actual value of the measured the power grid harmonic, then according to the actual amount of harmonic to configure appropriate reactor. Core reactor reactance linearity is bad, have noise, tubular reactor running without noise, good linearity, low loss.
Standard tubular reactor capacity under 100 kvar, per volt ampere loss is not greater than 0.03 W. For example, a single 12000 va reactance rate 6% of the loss of reactor is 360 w, three-phase active loss of 1080 w, this is a big number. On the power grid harmonic is small, the current limiting reactor can save power.
4. due to set up a series reactor, reduces the system to the parallel capacitor device or capacitor device to the system to provide the short circuit current value.
5. can reduce the discharge current of capacitor group to fault capacitor, electric power capacitor protection.
6. can reduce the flow of the capacitor Banks, which is beneficial to contact arcing, reduce operating over voltage amplitude.
7. reduced because of operating overvoltage caused by parallel capacitor group amplitude, is advantageous to the grid overvoltage protection. Three-phase series reactor
3 selection principle
Power enterprise has its own characteristics, have different request for equipment, dry type reactor with small noise, reactor good linearity, high mechanical strength, simple installation and so on; Oil-immersed reactor loss small, cover an area of an area small, poor linearity, noise is big. Therefore, adopt what kind of reactor should be considered. Series reactor main effect is, limit the inrush current and filter out harmonic to suppress harmonic wave. Reactance rate of reactor is the main parameter, the size of the reactor directly influence its function.
Current limiting reactor reactance rate at 0.1 to 1%, and that failure to suppress harmonic reactor reactance rate from 4.5% to 13%, the current limiting reactor restricts the flow condenser 10 times the rated current for a tip. Configuration current-limiting reactor, should consider the line reactance mu (1 H/M).
4. the product description
1. The series reactor, through the inside is alternating current (ac), it is used and the power factor compensation capacitor in series, of steady-state harmonic (5, 7, 11, 13) constitute a series resonance. Usually have 4.5 ~ 6 (%) reactor reactance rate, often to 5 harmonic reactor reactance rate was 6% belong to Gao Gan values, usually for 3 harmonic reactance rate (%) of 12 ~ 13, the 2 harmonic reactance rate is usually 26 ~ 27 (%) Gao Gan value reactor.
2. Safety, fire fire prevention, environmental protection no pollution, can be installed directly in the center of the load. Imported epoxy resin, the product has high mechanical strength, anti-short circuit ability, low partial discharge, high reliability. Low loss, low noise, no maintenance, easy installation, energy saving effect is obvious. Moistureproof performance is good, can be in high humidity, such as running in the tropics and other bad environment.
5. for the environment
1. The height is not more than 2000 meters above sea level;
2. Operating environment temperature is 25 ~ + 45 ℃), the relative humidity of not more than 90%;
Around 3. No harmful gases, no inflammable and explosive articles;
4. The environment should have good ventilation conditions, such as the series reactor in the enclosure, shall be equipped with ventilation equipment.
6 the product characteristics
1. The system can be used for 400 v, 660 v;
2. The types of reactance rate: 1%, 6%, 12%;
3. The rated insulation level 3 kv/min;
4. Each part of the reactor temperature limit: iron core is less than 85 k, electric coil temperature rise shall not exceed 95 k;
5. The reactor is not more than 45 db noise;
6. Reactor in power frequency and harmonic current is not more than 1.35 times the rated electric shed long running;
7. Reactance value linearity: 1.8 times the rated electric drips reactance value and rated power of the ratio of the reactance value of not less than 0.95;
8. Any two phase of the series reactor reactance value is not greater than the difference between the + / - 3%;
9. Heat resistance level H (above 180 ℃).
7 technical parameters
Insulation structure: dry type reactor
With or without core: the core type reactor
Winding pattern: foil around
Product certification: CE
Figure crown brand:
Use: series reactor
10 to 1000 (A) rated current:
System rated voltage: 0.4 (KV)