CN103178531A - Active power transfer type intelligent combined capacitor - Google Patents

Abstract

The invention discloses an active power transfer type intelligent combined capacitor which comprises a power capacitor module, a combination switch, a setting module and a circuit breaker, wherein the combination switch is respectively connected with the setting module, the power capacitor module and the circuit breaker; the circuit breaker is connected with the power capacitor module; the combination switch is used for controlling the switching of the power capacitor module; and the setting module is used for setting the parameters of the power capacitor module. The active power transfer type intelligent combined capacitor has the advantages of compensating the reactive power and adjusting the three-phase imbalance of an external power source.

Description

The meritorious box-like capacitor of transfevent smart group

Technical field

The present invention relates to the Intelligent combined power capacitor module of reactive power compensation, particularly the meritorious box-like capacitor of transfevent smart group.

Background technology

At present, in common transformer, most loads are single-phase load, because the synchronism of each user's equipment total capacity and electricity consumption time length and use is different, cause distribution system to be in the three-phase imbalance state, namely produce corresponding negative-sequence current and zero-sequence current in power distribution network.Negative-sequence current and zero-sequence current have a great impact system, can increase the loss of transformer and circuit, cause system neutral skew, reduce the harm such as power consumption equipment useful life.Most low-voltage compensation equipment can only accomplish to compensate negative-sequence current at present, and zero-sequence current is not had compensating action.The reactive power compensator that the low-voltage intelligent combined capacitor that grew up has in recent years progressively substituted traditional isolating switch, fuse, reactive power compensation checkout gear, the special-purpose switching relay of capacitor or has been comprised of reverse-blocking tetrode thyristor, reactor, power capacitor module.Although present combined capacitor can substitute traditional reactive power compensator, be used for compensating reactive power, can not regulate three-phase imbalance,

Summary of the invention

The objective of the invention is to provide a kind of novel meritorious transfevent smart group box-like capacitor, can solve one or more in above-mentioned prior art problem.

According to an aspect of the present invention, provide a kind of meritorious transfevent smart group box-like capacitor, comprised power capacitor module, composite switch module, module and circuit breaker are set; Composite switch module respectively with module is set, the power capacitor module is connected with circuit breaker; Circuit breaker is connected with the power capacitor module; Composite switch module is controlled power capacitor module switching; Module is set, the parameter of power capacitor module is set.

The box-like capacitor of meritorious transfevent smart group of the present invention can compensating reactive power, can regulate again the three-phase imbalance of external power supply.

In some embodiments, composite switch module is connected with circuit breaker by binding post, and the power capacitor module is connected with circuit breaker by binding post.Thus, circuit breaker is divided into many groups by binding post with circuit, then is connected with the power capacitor module, can realize each combination switch one group of power capacitor of control separately.

In some embodiments, also comprise the display module that is connected with composite switch module, show the parameter of power capacitor module.Thus, can show the plane No. of power capacitor module and the details of every group of power capacitor.

In some embodiments, display module is to show module is set with module integration is set.Thus, the effect that has compact conformation.

In some embodiments, the power capacitor module comprises an above Monophase electric power capacitor.Thus, a plurality of Monophase electric power capacitors are placed in a capacitance shell, make combination capacitor integrated, be more convenient for installing accumulating.

Description of drawings

Fig. 1 is the syndeton schematic diagram of the box-like capacitor of meritorious transfevent smart group of one embodiment of the present invention.

Fig. 2 is the mechanical structure schematic diagram of the box-like capacitor of meritorious transfevent smart group of one embodiment of the present invention.

Fig. 3 is the phase diagram of the box-like capacitor of meritorious transfevent smart group of one embodiment of the present invention.

Fig. 4 is the circuit diagram of the box-like capacitor of meritorious transfevent smart group shown in Figure 3.

Embodiment

The invention will be further described by the following examples, but protection range is not subjected to the restriction of these embodiment.

Fig. 1 has schematically shown the structure according to the box-like capacitor of meritorious transfevent smart group of one embodiment of the present invention.

As Fig. 1 and Fig. 2, the box-like capacitor of this meritorious transfevent smart group comprises that power capacitor module 1, composite switch module 2, demonstration arrange module 6, binding post 4 and circuit breaker 3.

Composite switch module 2 is electrically connected to circuit breaker 3 by binding post 4, and power capacitor module 1 is electrically connected to circuit breaker 3 by binding post 4.

Composite switch module 2 arranges module 6 with power capacitor module 1 and demonstration and is electrically connected to.

Composite switch module 2 is controlled power capacitor module 1 switching.

The user can arrange the parameter that module 6 arranges power capacitor module 1 by demonstration, can show the parameter of power capacitor module 1 simultaneously.

In the present embodiment, display module is to show module 6 is set with module integration is set, and can be touch display screen.In other embodiments, display module can be also split with module is set, and display module can be LCDs, and it can be button that module is set.

Power capacitor module 1, composite switch module 2, binding post 4 and circuit breaker 3 all are placed in shell 5 inside, show the outer surface that module 6 is installed on shell 5 is set.

The user can access any two alternate in the external power supply three-phase with compensating module by circuit breaker 3, and the capacity of access is comprehensively determined by capacity of distribution transform, load and load unbalanced degree.

The built-in above Monophase electric power capacitor of power capacitor module 1.Power capacitor module 1 can also built-in explosion-protection equipment and temperature sensor.

One utmost point of each Monophase electric power capacitor is electrically connected to a joint of corresponding binding post 4, be incorporated into one the tunnel through binding post 4, arbitrary being electrically connected in circuit breaker 3 and bus again, an other utmost point of Monophase electric power capacitor is electrically connected to the wire pin that goes out of corresponding composite switch module 2, corresponding contact on the inlet wire pin of composite switch module 2 and binding post 4 is electrically connected to, be incorporated into one the tunnel through binding post 4, then other in circuit breaker 3 and bus is electrically connected.

In one embodiment, the power capacitor module 1 of this meritorious transfevent combined capacitor comprises four groups of Monophase electric power capacitors, and composite switch module 2 comprises four groups of combination switches, and combination switch is controlled unidirectional electric power capacitor switching, and control circuit is independent mutually.Composite switch module 2 is connected with the outside, calculates no-power vacancy after the collection current/voltage, then controls the corresponding unidirectional power capacitor of combination switch switching on composite switch module 2, thus the purpose that reaches compensating reactive power and regulate three-phase imbalance.

Fig. 3 and Fig. 4 have schematically shown the alternate compensation principle of single-phase capacitance of the box-like capacitor of meritorious transfevent smart group of one embodiment of the present invention.

As shown in Figure 3 and Figure 4, if the access capacity is C between any two-phase _ABThe Monophase electric power capacitor, when non-loaded, have

Due to line voltage

Leading phase voltage And capacitance current

Leading voltage again So will Decompose

On, can draw electric current Its direction is opposite with A phase current positive direction, and A phase active current will reduce

Be A meritorious minimizing the mutually:

$\mathrm{\Δ}{P}_a=-\frac{1}{2}\mathrm{Iqab}\·U=-\frac{1}{2}\·\frac{1}{\sqrt{3}}{C}_{\mathrm{AB}}=-\frac{\sqrt{3}}{6}{C}_{\mathrm{AB}}---\left(1\right)$

Will

Decompose leading U _aOn the direction of 90 °, this component is the forward of A compatibility electric current, by upper figure this size of current as can be known

Be the idle increase of A compatibility:

$\mathrm{\Δ}{Q}_a=\frac{1}{2}{C}_{\mathrm{AB}}---\left(2\right)$

In like manner The idle increase of B compatibility

Active power increases

Can draw thus at alternate capacity in parallel is C _PhaseSingle-phase capacitance, the leading phase active current will reduce, hysteresis phase active current increases, namely to hysteresis phase transfer active power

And each obtains two-phase

Reactive power compensation.

Above-described is only some embodiments of the present invention.For the commonsense method personnel of this area, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (5)

1. the meritorious box-like capacitor of transfevent smart group, is characterized in that, comprising: power capacitor module (1), composite switch module (2), module and circuit breaker (3) are set;

Described composite switch module (2) is connected with described module, power capacitor module (1) and the circuit breaker (3) of arranging respectively;

Described circuit breaker (3) is connected with power capacitor module (1);

Described composite switch module (2) is controlled described power capacitor module (1) switching;

The described module that arranges arranges the parameter of described power capacitor module.

2. the box-like capacitor of meritorious transfevent smart group according to claim 1, it is characterized in that, described composite switch module (2) is connected with described circuit breaker (3) by binding post (4), and described power capacitor module (1) is connected with described circuit breaker (3) by binding post (4).

3. the box-like capacitor of meritorious transfevent smart group according to claim 1, is characterized in that, also comprises the display module that is connected with described composite switch module (3), shows the parameter that described power capacitor module (1) arranges.

4. the box-like capacitor of meritorious transfevent smart group according to claim 3, is characterized in that, described display module and the described module integration that arranges arrange module (6) for showing.

5. the box-like capacitor of the described meritorious transfevent smart group of according to claim 1～4 any one, is characterized in that, described power capacitor module (1) comprises an above Monophase electric power capacitor.

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