MNG dynamic reactive power compensation and harmonic treatment complete sets of devices, connected in parallel to the rated voltage of 6kV, 10kV, 27.5kV, 35kV, 110kV and other AC power systems, to improve the system power factor, adjust the grid voltage and reduce line loss , Improve the utilization of power grid, The device is a kind of static dynamic reactive power compensation (SVC), can provide positive and negative continuous adjustable reactive power, using patented technology to produce magnetron adjustable reactor, which can be more precise control of the system Voltage and reactive power, is the existing reactive power compensation device upgrade products. Since there is little or no impact and inrush caused by capacitor switching, the reliability and lifetime of the device can be greatly improved. Can be three-phase compensation, respectively, especially adapted to three-phase power imbalance situation.
1-Elimination of harmonic pollution, improve the safety factor of the power system, improve the voltage stability of the power grid and transmission line transmission capacity.
4- MNG-type magnetron reactor SVC dynamic reactive power compensation system cost-effective, compared to the price of domestic TCR-SVC lower 1/3, only 40% of imported TCR-SVC.
7-<spantimes new="" roman"'=""> The oil-immersed magnetron reactor consists of air-core, coil, fuel tank, radiator, oil conservator, casing, pressure relief valve, gas relay and thermometer according to capacity, Both pressure, gas, temperature protection device.
Second, the product type
Third, the complete set of devices:
MNG dynamic reactive power compensation and harmonic control complete sets of devices mainly by the switchgear, series reactor, capacitors, magnetron reactor, discharge coil, zinc oxide surge arresters, disconnectors, control panel and other components. Switchgear and relay protection screen by the user to solve or negotiated settlement. Shunt capacitor can be a collection, but also can be a frame structure, the capacitor to the system to deliver capacitive current, play the role of reactive power compensation.
Series reactors connected in series in the capacitor circuit, and mainly be limiting inrush current suppression harmonic optimization purposes. Only used to suppress closing inrush, should be selected for each phase rated inductance XL (0.1-1)% XC. (XC is the rated capacitive reactance of each phase of the capacitor bank). To suppress the 5th and above harmonics, XL (4.5-6)% XC capacitors should be used. , Should be used XL (12-13)% XC capacitors.
Discharge coil (or voltage transformer) connected in parallel in the capacitor circuit, when disconnected from the power supply, the residual voltage on the capacitor can be reduced from √2Un to below 50V within 5s.
Zinc oxide arrester access Y-line access, which points to the ground, in order to limit the switching capacitor operation caused by over-voltage. Disconnector may be connected to a ground line isolation and can be isolated in pairs, it may be both.
Fourth, a schematic diagram:
Fives. Magnetron reactor working principles:
Magnetron-controlled reactor is the use of DC magnetization principle, the use of additional DC excitation, magnetizing reactor core, by adjusting the degree of magnetic saturation of magnetron reactor core, change the core permeability, to achieve the continuity of reactance Adjustable.
The iron core disposed staggered unsaturated region and saturated region of the core composed of parallel magnetic circuit core, In the magnetic circuit scale is set in parallel with the unsaturated region saturated core region or area set unsaturated region and the saturated region of the core of each core reluctance,By adjusting the thyristor trigger conduction angle to control the additional DC excitation current excitation magnetization of the iron core so that the leakage flux in the saturation region of the core by the main magnetic flux direction is adjacent to the adjacent or left and right adjacent to the unsaturated zone core Absorb and form a self-shielding, By changing the magnetic magnetization of the iron core, the magnetic saturation of the iron core in the unsaturated zone and the iron core in the saturated zone of the parallel magnetic circuit can be changed continuously and quickly and easily.
Controllable reactor principle wiring diagram shown in Figure 2.
Figure 2 magnetron reactor principle wiring diagram
In the controllable reactor work on the core column symmetrically around the winding number of turns N / 2 of the coil, which has a tap ratio of N2 / N taps, between them indirectly SCR Tl, T2, The two main windings of different cores are cross-connected in parallel to the power supply, and the free-wheeling diode is connected in the middle of the two coils.
When the magnetron main winding connected to the power supply voltage, both ends of the SCR induces about 1% of the system voltage. Triggering the thyristor T1 to turn on the thyristor T1 in the positive half cycle of the power supply voltage to form an equivalent circuit as shown in the following diagram (a), generating a direct current control current in the loop; turning on the thyristor T22 in the negative half cycle of the power supply voltage, b) The equivalent circuit shown in the circuit to produce DC control current.
Two silicon controlled rectifier turns on and off alternately in a power cycle, generating DC control current, making the core of the reactor work in saturation and the output current increases. MCR output current depends on the thyristor control angle, the smaller the control angle, the stronger the generated control current to the core magnetic saturation higher electric work reactors, larger output current. Therefore, to change the thyristor control angle, the capacity of the reactor can be adjusted smoothly. And from the above analysis shows that magnetron reactor with self-excitation function, eliminating the need for a separate DC control power.
Six, magnetron reactor structure design:
Magnetic flux leakage from the magnetic circuit using parallel shielded from the magnetic circuit and the magnetic circuit coupling DC co-design techniques,Core flux density using symmetric division unsaturated structure, parallel windings with vertical and horizontal symmetrical structure. Application of large transformer structure technology, high-voltage current transformer (CT), voltage transformer (PT), capacitive voltage transformer (CVT) insulation technology, through years of research and development created by the new technology, the real magnetron reactor Product; compared with the solenoid valve controllable reactance technology, the real loss, low noise, close to the level of low-loss power transformers; Reasonable structure, the production process is mature. Can be mass-produced; reliable quality, safe operation, maintenance-free, low cost. Unsaturated design of iron core, with symmetrical structure does not interfere with each other, core loss is small, low noise; volt-ampere characteristics, approximate straight line (silicon steel sheet of the linear curve of the curve. Body substantially no harmonics, the control circuit generates a small amount of harmonics, since △ wiring, not to the system output; effective primary leakage flux in the core shield, a small coil and tank leakage magnetic flux, an additional Low loss and low total loss. According to the capacity, it is less than 50% of the solenoid-controlled reactors or phase-controlled reactors (TCR) in the SVC. It is easy to install and occupies a small footprint and basically does not require maintenance. Capacity adjustment range: 1% ~ 100%.
