TBBW-12 Outdoor Reactive Power Compensation Device | High Voltage Grid Solutions

Feature

The device is used outdoors, using a frame structure, that is, the parts of the frame (including straight beams, beams and rungs, etc.) are connected by bolts and other series of standard parts to form a capacitor bank structure, which is surrounded by a mesh door, which is suitable for places where the load of electrical equipment is relatively stable, and is suitable for places with poor electrical environment, and the device has the characteristics of low price and convenient transportation.

Generally, the dry air-core reactor is connected to the neutral point side or the power supply side of the device to limit the closing inrush current, suppress the higher harmonics, and improve the network voltage waveform.

Reactor parameter selection: buckle closing inrush current, the reactance rate is generally 0.5%-1%, suppress more than 5 times of noir wave, the reactance rate is 4.5-7%, suppress more than 3 harmonics, the reactance rate is 12-14%.

Parameter

Compensation effect: the power factor can reach 0.95 after compensation, the high-voltage power capacitor with advanced technology and full-film dielectric has the characteristics of high reliability, long life, low loss, low operating temperature rise, etc., and also has the outstanding characteristics of high discharge initial voltage and good sealing performance; Observation window, with forced locking function; The device can operate for a long time under the steady-state overvoltage of 1.1 times the rated voltage; The device can run continuously under the overcurrent with the root mean value of the square not exceeding 1.3 times the rated current of the capacitor bank; according to the needs of the system and users, the device can adopt local control or main control room, centralized control, or automatic control; the difference between the measured total capacity of the whole group of capacitor banks and the sum of the rated values of each capacitor does not exceed +10%~0, and the deviation of the capacitance of each phase does not exceed 5%.

Main technical performance indicators

1. Capacitance deviation

The difference between the actual capacitance and the rated capacitance of the device is within the range of 0~+5% of the rated capacitance, and the ratio of the maximum and minimum capacitance between any two line terminals of the device shall not exceed 1.02.

2. Inductance deviation

Under the rated current, the allowable deviation of the reactance value is 0~+5%, and the reactance value of each phase does not exceed ±2% of the average value of the three phases.

3. Insulation level

Rated voltage of the device	1min power frequency withstand voltage of primary circuit (rms)	Primary circuit impulse withstand voltage [(1.2-5)/50μs peak]	Secondary circuit 1min power frequency mine receiving voltage (rms value)
6	32	60	2
10	42	75	2
35	95	200	2

4. Overload capacity

（1）Steady-state overvoltage

Power frequency overvoltage U	Maximum duration	illustrate
1.1	long-term	The maximum value of long-term overvoltage does not exceed 1.10UN
1.15	30min every 24h	Adjustment and fluctuation of system voltage
1.2	5min	The voltage rises at light loads
1.3	1min	The voltage rises when the load is blamed

(2) Steady-state overcurrent: it can operate for a long time under the root mean value of no more than 1.1×1.3IN.

(3) When switching the capacitor with a switch that does not break down heavily, a transition overvoltage with a peak value of no more than 2 √2 times the applied voltage (rms value) and a duration of no more than 1/2 cycle may occur. THE CORRESPONDING TRANSITION OVERCURRENT PEAK MAY REACH 100IN, IN WHICH CASE 1000 OPERATIONS PER YEAR ARE ALLOWED.

(4) Maximum allowable capacity: within the limits of 5.4.1 and 5.4.2, the total capacity shall not exceed 1.35QN.

(5) Discharge performance: 5s after power-off, the voltage on each group of capacitors is lower than 50V.