|Place of Origin:Shandong, China (Mainland)||Brand Name:Hoteam|
|Model Number:HTSVG -0.4||work voltage:0.4/0.69KV ±15%|
|Work frequency:50/60Hz±2%||Reactive power output range:Rated inductive to rated capacitive reactive, continuous adjustment|
|Effective response time:Transient response<0.1ms, complete response≤10ms|
static voltage compensator
(1)maintain receiving end voltage, strengthen system voltage stability
For the load center, dut to large capacity and no large reactive power as support, it is easy to cause grid voltage on the low side and voltage collapse accident. While SVG has fast reactive power adjustment ability, it can maintain load side voltage, to improve voltage stability of power supply system at load side.
(2)compensate system reactive power, improve power factor, reduce line loss, save energy and reduce cost
A variety of loads in electricity system such as asynchronous motors,electric arc furnance,rolling mill and large capacity rectifying equipment and so on will need a large number of reactive power during working;at the same time, transformer and line impedance in the power distribution grid will also generate some reactive power, that will reduce the system power factor.
For electric power system, load’s low power factor will increase energy loss and voltage drop of power supply line, which reduced voltage quality. Meanwhile, reactive power also cause the reduction of availability of power generation,power distribtion,power supply equipments;for electric consumer, low power factor will increase electricity bill, increase production cost.
(3)suppress voltage fluctuation and flicker
The voltage fluctuation and flicker are mainly caused by load dramatic change. This change will cause current sharp fluctuation, cause the electric power grid voltage flicker. The typical loads that cause voltage flicker have electric arc furnace,rolling mill,electric locomotive and so on.
SVG can fast provice varying reactive current, to compensate voltage fluctuation and flicker caused by load changes.
At present, the best equipment to suppress voltage fluctuation and flicker is SVG.
(4)filter the harmonics
There are a large number of non-linear loads in power distribution grid such as inverter,internal mixer,elevator and arc furnance. They cause grid has a lot of harmoni,voltage/current waveform distortation, electrical equipment fault rate increase, distribution system loss increase, and even happen grid resonance which lead to trip accident. HTSVG can generate equivalent and reverse compensation current to filter harmonic, the maximum compensation capacity is 30% of device capacity.
(5)suppress t hree phase unbalance
Power distribution grid has many three phase unbalanced loads, such as electric locomotive traction loads and AC furnance. The three phase impedance unbalance of line, transformer and other distribution equipment will also cause voltage unbalance.
HTSVG can fast compensate negative current generated by unbalanced loads, always insure the three phase current to grid is balanced, greatly improve the quality of power supply.
SVG is the most advanced reactive power device at now. The compensation device based on voltage source type inverter has realized a qualitative leap of reactive power compensation mode. It not longer use capacitance and inductance devices of large capacity, but through high-frequency switch of high-power electronic device to realized conversion of reactive energy. Technically speaking, HTSVG has the following advantages compared traditional reactive power compensation device:
(1)faster response speed
SVG response time:≤10ms.
Traditional SVC response time: ≥20ms(if too fast, may cause oscillation of reactor and capacitor).
SVG can complete interconversion from rated capacitive reactive power to rated inductive power within a very short time, this incomparable response speed completely can be competent to the impact load compensation.
(2)stronger voltage flicker suppress ability
The suppress of SVC on voltage flicker can be 2:1 at most, while SVG can be 5:1 or even higher. Being subject to the limitation of response speed, SVC’s voltage flicker ability will not increase along with the increase of compensate capacity. But as SVG has faster response speed, increasing device capacity can continuously improve its voltage flicker suppress ability.
(3)wider operating range
The output current of SVG is not depend on the voltage, performed as the characteristics of constant current source, can work among the ranges of rated inductive to rated capacitive, has wider operating range. While the nature of SVC is impedance compensation, the output current and voltage have linear relation. So when system voltage reduces, SVG can proved greater compensation capacity compared with the same capacity SVC, the characteristic of voltage and current are as follows, (4)diversified compensation function
HTSVG not only has fast reactive power compensation functions, but also can compensate load harmonic current, negative-sequence current and other power quality problems based on user actual requirement.
(5)low switch ripple output characteristic
HTSVG use two same three phase full bridge inverters in parallel, which improved equipment capacity;and IGBT drive used PWM switch ripply cancellation technology which has our own patent, greatly reduced output ripple wave, circuit diagram as follows picture 4.
HTSVG-x/xxx Hoteam SVG
Apply to three phase three wire system, filter connect among three phases of grid, canfilter no-zero order harmonic, and compensate reactive power and unbalanced three phase.
20kvar~400kvar(single cabinet, cabinet dimension see table 2)
Reactive power output range
Rated inductive to rated capacitive reactive, continuous adjustment
Reactive power output characteristics
Current source output
Power factor compensation,voltage flicker suppress,harmonic compensation,load unbalanced compensation
Effective response time
Transient response<0.1ms, complete response≤10ms
Switch ripply wave staggering technology, effectively reduce current ripply wave
Over load protection
Automatically limit at 100% rating output
Moret han 97% when full load
3, 0.2 level and above, 5A at secondary side
Current detection mode
Field programmable source current detection or load current detection mode
Display and port
7 or 10inch touch screen.
4 digital input, 2 digital output
5 sets in parallel at most
IP3X(please contact manufacturer for higher protection level)
RAL7035, can be custom made
Up to detailed model
Indoor installation, clean ambient
Max 95%RH(no condensation)
Not higher than 1000m(can be higher altitude by reducing capacity)
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