CN209805425U

CN209805425U - Split-phase control power electricity saver circuit

Info

Publication number: CN209805425U
Application number: CN201920850730.9U
Authority: CN
Inventors: 谢敬智
Original assignee: Jiayinuo Energy Saving Equipment Jining Co Ltd
Current assignee: Jiayinuo Energy Saving Equipment Jining Co Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2019-12-17
Anticipated expiration: 2029-06-06

Abstract

The utility model belongs to the technical field of the circuit principle and specifically relates to split phase control power electricity-saving appliance circuit, include the three-phase power supply and the neutral conductor by power transformer output, be connected with a four-wire knife switch on three-phase four-wire line, all connect the perception load on each looks line of three-phase line of four-wire knife switch below, be connected with an executive circuit, controller, signal acquisition circuit on each single-phase line respectively. The split-phase control power electricity saver circuit thoroughly changes the working mode of the traditional reactive power compensation cabinet, and enables the power factor of each phase in a three-phase power supply to be accurately compensated; reducing load power consumption; the compensation power factor is more accurate; the three phases are independently compensated and do not influence each other, and are respectively independently and accurately controlled, so that the reactive current of the transformer can be reduced, the total current of a main circuit is reduced, the power factor of a power grid is improved, and the efficiency of inductive electric appliances is greatly improved.

Description

Split-phase control power electricity saver circuit

Technical Field

The utility model belongs to the technical field of the circuit principle and specifically relates to split-phase control electric power electricity-saving appliance circuit.

Background

For a power supply, the magnitude of the power factor is indicative of the degree to which the power supply power is utilized. The lower the power factor, the greater the current in the line, and the greater the voltage drop and losses in the line, for the same power delivered at the same voltage.

To solve the problem of low power factor, a powerless compensation device is used. With the rapid development of society, most hotels and residential buildings in cities and towns are provided with a large amount of single-phase air-conditioning and inductive load electric equipment, and the working time and the load of the equipment are uncertain. However, the conventional three-phase powerless compensation device only uses one-phase power supply as a parameter for sampling, and is hard to be sufficient for the circuit condition of the three-phase unbalanced load.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical scheme that one of above-mentioned technical problem adopted and be: the split-phase control power electricity saver circuit comprises a three-phase power supply and a neutral line which are output by a power transformer, wherein a three-phase four-wire line is connected with a four-wire knife switch, each phase line of each three-phase line below the four-wire knife switch is connected with an inductive load, and each single-phase line is respectively connected with an execution circuit, a controller and a signal acquisition circuit; the signal acquisition circuit is used for acquiring current signals and power factors on each single phase line; each signal acquisition circuit comprises a current acquisition circuit and a power factor acquisition circuit; the current acquisition circuit comprises a set of current transformers arranged at the outer sides of the corresponding single-phase lines, and two ends of each current transformer are respectively connected with two current signal input ends of the controller; the power factor acquisition circuit comprises power lines of which the two head ends are respectively connected with a zero line and a corresponding single phase line, the tail ends of the two power lines are respectively connected with the power input end of the controller, and the power factors are respectively acquired by the phase lines; the output end of the controller is connected with the execution circuit and used for controlling the execution circuit to be started.

Preferably, the controller adopts JKW-_2DBthe reactive power automatic compensation controller.

preferably, the execution circuit comprises a single-phase power capacitance switching switcher component, and two ends of the single-phase power capacitance switching switcher component are respectively connected with the zero line and the corresponding phase line.

Preferably, the single-phase power capacitance switching switcher assembly is composed of a plurality of groups of sub-circuits arranged in parallel.

Preferably, the sub-circuit comprises a 2P air switch connected with a zero line and a phase line, the output end of the 2P air switch is connected with a solid switch, the zero line and the phase line at the output end of the solid switch are respectively connected with a reactor in series, and the terminals of a single-phase power capacitor are respectively connected with the two reactors; and a control power supply of the solid-state switcher is connected with the output end of the controller.

Preferably, the frequency of the single-phase power capacitor is 50HZ, and the withstand voltage is 0.45 KV.

The beneficial effects of the utility model are embodied in: the split-phase control power electricity saver circuit thoroughly changes the working mode of the traditional reactive power compensation cabinet, and enables the power factor of each phase in a three-phase power supply to be accurately compensated; reducing load power consumption; the compensation power factor is more accurate; the three phases are independently compensated and do not influence each other, and are respectively independently and accurately controlled, so that the reactive current of the transformer can be reduced, the total current of a main circuit is reduced, the power factor of a power grid is improved, and the efficiency of inductive electric appliances is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of the circuit connection relationship of the present invention.

Fig. 2 is a schematic diagram of a circuit connection relationship of the single-phase power capacitor switching switcher assembly of the present invention.

In the figure, 1, four-wire knife switch; 2. An inductive load; 3. an execution circuit; 4. A controller; 5. A current collection circuit; 501. a current transformer; 6. a power line; 7. a sub-line; 8. 2P is opened in an empty mode; 9. a solid state switch; 10. a reactor; 11. a single-phase power capacitor; 12. a fuse; 13. a power transformer.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-2, the split-phase control power electricity-saving device circuit includes a three-phase power supply and a neutral line output by a power transformer 13, a four-wire knife switch 1 is connected to the three-phase four-wire line, an inductive load 2 is connected to each phase line of each three-phase line below the four-wire knife switch 1, and an execution circuit 3, a controller 4 and a signal acquisition circuit are respectively connected to each single-phase line; the signal acquisition circuit is used for acquiring current signals and power factors on each single phase line; each signal acquisition circuit comprises a current acquisition circuit 5 and a power factor acquisition circuit; the current acquisition circuit 5 comprises a set of current transformers 501 arranged outside the corresponding single-phase line, and two ends of each current transformer 501 are respectively connected to two current signal input ends of the controller 4; the power factor acquisition circuit comprises power lines 6 of which the two head ends are respectively connected with a zero line and a corresponding single phase line, the tail ends of the two power lines 6 are respectively connected with the power input end of the controller 4, and the power factors are respectively acquired by the phase lines; the output end of the controller 4 is connected with the execution circuit 3 and is used for controlling the execution circuit 3 to be started.

Preferably, the controller 4 employs JKW-_2DBThe reactive power automatic compensation controller. The purchasing manufacturer is a moon group company Limited, and the power compensation can be realized by adopting the existing functions without improvement.

In the figure, Ua and Un are power input ends on the controller 4 and are connected with phase A and phase N; ia. In is the current signal input terminal.

Preferably, the execution circuit 3 includes a single-phase power capacitor 11 switching switch component, and two ends of the single-phase power capacitor 11 switching switch component are respectively connected with the zero line and the corresponding phase line.

Preferably, the single-phase power capacitor 11 switching switcher assembly is composed of a plurality of groups of sub-circuits 7 arranged in parallel.

Preferably, the sub-circuit 7 comprises a 2P air switch 8 connected with a zero line and a phase line, an output end of the 2P air switch 8 is connected with a solid switch 9, the zero line and the phase line at the output end of the solid switch 9 are respectively connected with a reactor 10 in series, and terminals of a single-phase power capacitor 11 are respectively connected with the two reactors 10; the control power supply of the solid-state switcher 9 is connected with the output end of the controller 4.

Preferably, the frequency of the single-phase power capacitor 11 is 50HZ, and the withstand voltage is 0.45 KV.

Each phase circuit respectively adopts a multi-stage protection device: a solid-state switcher 9 capable of realizing contactless switching; 2P air-break 8 circuit breakers are arranged on each road, and overcurrent protection can be realized;

Each circuit is connected with a reactor 10 in series, so that instant surge current and partial harmonic can be prevented from being filtered.

The power of each single-phase power capacitor 11 is different in size, and mainly prevents switching oscillation.

A fuse 12 is connected in series to the power supply connecting the power signal end of each controller 4 and the zero line, and a fuse 12 is connected in series to each power line 6 connecting the power signal end of each controller 4 and each phase line.

The working principle is as follows:

The circuit has three circuits including JKW-_2DBThe 220V reactive compensation controller of the reactive power automatic compensation controller is a mature product on the market, the current transformers 501 respectively sleeved on the power supplies of all phases respectively provide sampling parameters of all phases for the three controllers, and direct sampling is carried out behind the transformers to ensure the sampling accuracy, so that the reactive power automatic compensation controller accurately controls the circuits of all phases to realize the accurate compensation of the power factors of all phases of the power supplies. Of course, when the reactive power compensation controller is used, various parameters needing to be set in advance and various numerical values needing to be regulated and controlled finally can be set on an input panel of the 220V reactive power compensation controller in a conventional mode, and the operation is simple and convenient.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification; to those skilled in the art, any alternative improvements or changes made to the embodiments of the present invention are all within the scope of the present invention.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims

1. The split-phase control power electricity saver circuit is characterized in that: the system comprises a three-phase power supply and a neutral line which are output by a power transformer, wherein a four-wire knife switch is connected on a three-phase four-wire line, inductive loads are connected on each phase line of the three-phase line below the four-wire knife switch, and an execution circuit, a controller and a signal acquisition circuit are respectively connected on each single-phase line; the signal acquisition circuit is used for acquiring current signals and power factors on each single phase line; each signal acquisition circuit comprises a current acquisition circuit and a power factor acquisition circuit; the current acquisition circuit comprises a set of current transformers arranged at the outer sides of the corresponding single-phase lines, and two ends of each current transformer are respectively connected with two current signal input ends of the controller; the power factor acquisition circuit comprises power lines of which the two head ends are respectively connected with a zero line and a corresponding single phase line, the tail ends of the two power lines are respectively connected with the power input end of the controller, and the power factors are respectively acquired by the phase lines; the output end of the controller is connected with the execution circuit and used for controlling the execution circuit to be started.

2. The split-phase control power saver circuit of claim 1 wherein: the controller adopts JKW-_2DBThe reactive power automatic compensation controller.

3. The split-phase control power saver circuit of claim 2 wherein: the execution circuit comprises a single-phase power capacitor switching switcher component, and two ends of the single-phase power capacitor switching switcher component are respectively connected with a zero line and a corresponding phase line.

4. The split-phase control power saver circuit of claim 3 wherein: the single-phase power capacitance switching switcher component is composed of a plurality of groups of sub-circuits which are arranged in parallel.

5. The split-phase control power saver circuit of claim 4 wherein: the sub-circuit comprises a 2P air switch connected with a zero line and a phase line, the output end of the 2P air switch is connected with a solid switcher, the zero line and the phase line at the output end of the solid switcher are respectively connected with a reactor in series, and the terminals of a single-phase power capacitor are respectively connected with the two reactors; and a control power supply of the solid-state switcher is connected with the output end of the controller.

6. The split-phase control power saver circuit of claim 5 wherein: the frequency of the single-phase power capacitor is 50HZ, and the withstand voltage is 0.45 KV.