CN208015369U - A kind of wireless low-voltage circuit pressure regulator - Google Patents

Abstract

The utility model discloses a kind of wireless low-voltage circuit pressure regulators.The pressure regulator includes the first main switch, second main switch, disconnecting switch, voltage regulation part, control unit, output end sampling unit and user terminal sampling unit, the input terminal of first main switch and the second main switch is connect with three-phase input power cord respectively, the output end of first main switch and the input terminal of voltage regulation part connect, the output end of the voltage regulation part and the input terminal of disconnecting switch connect, second main switch and the output end of disconnecting switch are connect with user terminal three-phase power line respectively, described control unit and the first main switch, second main switch, disconnecting switch and output end sampling unit are separately connected, and it is wirelessly connected with user terminal sampling unit.The voltage data is wirelessly sent to control unit by the utility model by acquiring the voltage data of user terminal, so that the voltage after transformation is more met the needs of user terminal, and can provide user terminal accurate voltage data for main website.

Description

A wireless low-voltage line voltage regulator

technical field

The utility model relates to the field of electric voltage regulating equipment, in particular to a wireless low-voltage line voltage regulator.

Background technique

With the urbanization of rural areas and the development of modern agriculture, especially with the implementation of a series of national policies to strengthen agriculture and benefit farmers and the policy of sending home appliances to the countryside, the entry of high-power electrical appliances into rural areas and households is accelerating, and the electricity consumption level in some areas is far from This phenomenon is more obvious in remote areas. In remote rural areas and farming and pastoral areas, power supply departments need to set up long-distance distribution network lines to supply power to loads. With the rapid growth of rural electricity load demand, the line power supply radius is long and the line diameter is small, which leads to the problem of low voltage at the end of the line and large loss, and the problem of "low voltage" appears to varying degrees. In the prior art, the low-voltage problem is generally solved by setting a low-voltage line voltage regulator. Since the low-voltage line voltage regulator is generally installed in a substation, the voltage signal collected by it is the voltage near the output end of the transformer. When the line power supply radius is long, There is a large difference between this voltage and the voltage at the user end, and accurate control and transformation cannot be performed. If the voltage at the user end is collected and transmitted through a cable, the wiring construction will be heavy and the cost will be high.

Utility model content

The purpose of the utility model is to provide a wireless low-voltage line regulator aiming at the deficiencies in the prior art.

In order to achieve the above purpose, the utility model provides a wireless low-voltage line voltage regulator, including a first main switch, a second main switch, an isolation switch, a voltage regulating component, a control unit, an output terminal sampling unit and a user terminal sampling unit, The input ends of the first main switch and the second main switch are respectively connected to the three-phase input power line, the output end of the first main switch is connected to the input end of the voltage regulating component, and the output terminal of the voltage regulating component is connected to the isolating switch The input terminals of the second main switch and the isolating switch are respectively connected to the three-phase power line of the user end, and the control unit is respectively connected to the first main switch, the second main switch, the isolating switch and the output sampling unit, And it is wirelessly connected with the sampling unit at the user end;

The control unit includes a first A/D converter, a first processor connected to the first A/D converter and the voltage regulation component, a memory connected to the first processor, a first wireless Data transmission module and switch control circuit;

The output sampling unit includes a first voltage sensor connected to the first A/D converter;

The user terminal sampling unit includes a second voltage sensor, a second A/D converter connected to the second voltage sensor, a second processor connected to the A/D converter, and a second processor connected to the second processor connected to the second wireless data transmission module.

Preferably, an isolation module is connected between the first voltage sensor and the first A/D converter.

Preferably, the control unit further includes a human-computer interaction and wireless communication module respectively connected to the first processor, and also includes a first power supply module, which communicates with the first A/D converter, the first processor, the switch The control circuit, human-computer interaction and communication modules are connected separately.

Preferably, the output terminal sampling unit further includes a second power supply module, and the second power supply module is respectively connected to the second processor, the second A/D converter and the third voltage sensor.

Preferably, the first power supply module and the second power supply module respectively include a main power supply module and a backup power supply module, and the backup power supply module includes a storage battery, and the storage battery is connected to a wind power generation device or a photovoltaic cell assembly.

Preferably, the wireless communication module adopts one of GPRS module, 2G module, 3G module or 4G module.

Beneficial effects: the utility model collects the voltage data of the user end and sends the voltage data to the control unit in a wireless manner, so that the transformed voltage is more in line with the needs of the user end, and can provide the master station with accurate voltage of the user end data.

Description of drawings

Fig. 1 is the schematic diagram of the wireless low-voltage line voltage regulator of the utility model embodiment;

Fig. 2 is the structural representation of the control unit of the utility model embodiment;

Fig. 3 is a schematic diagram of a user terminal acquisition unit in an embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, further clarifies the utility model, and this embodiment implements under the premise of the technical solution of the utility model, and it should be understood that these examples are only used to illustrate the utility model and are not intended to limit the utility model range.

As shown in Figures 1 to 3, the utility model provides a wireless low-voltage line regulator for three-phase low-voltage line voltage regulation. In the figure, U, V, and W are three-phase power lines, and the neutral line is not shown. Line N.

The voltage regulator includes a first main switch 1 , a second main switch 2 , an isolation switch 3 , a voltage regulating component 4 , a control unit 5 , an output terminal sampling unit 7 and a user terminal sampling unit 8 . Wherein, the first main switch 1, the second main switch 2 and the isolating switch 3 are all electrically controlled main switches. The input ends of the first main switch 1 and the second main switch 2 are respectively connected with the three-phase input power line, and the input end of the first main switch 1 is connected with the output end of the voltage regulating part 4, and the voltage regulating part 4 can adopt the prior art The voltage regulation circuit composed of the switch tube in the circuit can also use an autotransformer for voltage regulation. When the autotransformer is used for voltage regulation, the contactor control method in the prior art can be used to realize the connection of different output voltage lines of the autotransformer. The output end of the voltage regulating part 4 is connected to the input end of the isolating switch 3, the output ends of the second main switch 2 and the isolating switch 3 are respectively connected to the three-phase power line of the user end, and the control unit 5 is connected to the first main switch 1, the second The main switch 2, the isolating switch 3 and the output sampling unit 7 are respectively connected, and the control unit 5 is used to control the closing and opening of the first main switch 1, the second main switch 2 and the isolating switch 3, and is also used to control the operation of the device 4. .

The control unit 5 of the embodiment of the present utility model includes a first A/D converter 51 , a first processor 52 , a first wireless data transmission module 53 and a switch control circuit 54 . The input end of the first A/D converter 51 is connected with the first voltage sensor 71, the output end of the first A/D converter 51 is connected with the first processor 52, and the first processor 52 is connected with the first wireless data transmission module 53 , the switch control circuit 54 and the voltage regulating component 4 are respectively connected. The switch control circuit 54 is a control circuit composed of relays. By controlling the power gain and loss of the relays, the power gain and loss of the excitation coils of the first main switch 1, the second main switch 2 and the isolating switch 3 are realized, thereby realizing the first main switch 1, the second main switch 1 and the second main switch 1. 2. Closing and tripping of the main switch 2 and the isolating switch 3.

The user end sampling unit 8 of the embodiment of the present invention includes a second voltage sensor 81 , a second A/D converter 82 , a second processor 83 and a second wireless data transmission module 84 . The second voltage sensor 81 is connected with the input end of the second A/D converter 82, the output end of the second A/D converter 82 is connected with the second processor 83, and the second processor 83 is connected with the second wireless data transmission module 84 connections. In this way, the voltage data at the user terminal can be sent to the control unit through the second wireless data transmission module 84 to realize closed-loop control. The first A/D converter 51 and the second A/D converter 82 preferably adopt 24 A/D converters, and the first processor 52 and the second processor 83 can adopt existing processors such as single-chip microcomputers or DSP chips. . The output sampling unit 7 includes a first voltage sensor 71 . The first voltage sensor 71 is connected with the first A/D converter 51 and is used for measuring the three-phase voltage at the output end of the voltage regulating component 4 .

In order to prevent signal interference, an isolation module 6 is connected between the first voltage sensor 71 and the first A/D converter 51 . The isolation module 6 may adopt a photoelectric isolation module or a magnetic induction isolation module in the prior art.

The control unit of the embodiment of the utility model also includes a memory 55, a human-computer interaction 56, a wireless communication module 57 and a first power supply module 58, the first processor 52 and the memory 55, the human-computer interaction 56, the wireless communication module 57 and the first The power supply modules 58 are connected separately. Among them, the human-computer interaction 56 is used to complete relevant parameter setting and query operations, and the memory 55 is used to store data such as setting parameters. The wireless communication module 57 is used to send the working state of the voltage regulator and the voltage data collected by the first voltage sensor 71 to the master station to realize remote monitoring. These are all existing technologies and will not be repeated here. The wireless communication module 57 adopts one of GPRS module, 2G module, 3G module or 4G module. The second processor 83 is also connected to a second power module 85 . The first power module 58 and the second power module 85 respectively include a main power module and a backup power module. Both the main power supply module and the standby power supply module can be used to provide DC24V and DC5V power. The main power supply module includes a transformer and a diode rectification circuit, and a step-down rectification circuit composed of transistors or other types of switching tubes may also be used. The backup power module includes a storage battery, which is connected to the wind power generation device or photovoltaic cell assembly through a charging controller, and the battery is charged through the wind power generation device or photovoltaic cell assembly. When the main power supply fails, the power supply time of the backup power supply module can be extended .

The working principle of the present utility model: the second voltage sensor 81 collects the voltage signal of the user terminal and converts it into a digital signal through the second A/D converter 82, and the second processor 83 encodes the digital signal through the second wireless data transmission module 84 Send to the control unit 5, the first wireless data transmission module 53 receives the voltage data, when the voltage is positive, the first processor 52 controls the first main switch 1 to close through the switch control circuit, the second main switch 2 and the isolation switch 3 is disconnected, so that the voltage regulating component 4 is not put into operation. When the voltage at the input terminal drops below the set value, the first processor 52 controls the second main switch 2 to close through the switch control circuit, so that the voltage regulating component 4 works and controls The unit 4 uses the voltage data of the second voltage sensor 81 as a feedback signal to control the voltage regulation, and when the first voltage sensor 71 detects that the voltage at the output terminal of the voltage regulation component 4 is within a reasonable range, it controls the isolation switch 3 to close and controls the first The main switch 1 is turned off, and the pressure regulating component 4 is put into operation.

To sum up, the utility model collects the voltage data of the user end and sends the voltage data to the control unit in a wireless manner, so that the transformed voltage is more in line with the needs of the user end, and can provide the master station with accurate data of the user end. voltage data.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. A wireless low-voltage line voltage regulator, characterized in that it includes a first main switch, a second main switch, an isolating switch, a voltage regulating component, a control unit, an output terminal sampling unit and a user terminal sampling unit, the first The input terminals of the main switch and the second main switch are respectively connected to the three-phase input power line, the output terminal of the first main switch is connected to the input terminal of the voltage regulating component, and the output terminal of the voltage regulating component is connected to the input terminal of the isolating switch , the output ends of the second main switch and the isolating switch are respectively connected to the three-phase power line of the user end, the control unit is respectively connected to the first main switch, the second main switch, the isolating switch and the output sampling unit, and it is connected to the user Terminal sampling unit wireless connection; The control unit includes a first A/D converter, a first processor connected to the first A/D converter and the voltage regulation component, a memory connected to the first processor, a first wireless Data transmission module and switch control circuit; The output sampling unit includes a first voltage sensor connected to the first A/D converter; The user terminal sampling unit includes a second voltage sensor, a second A/D converter connected to the second voltage sensor, a second processor connected to the A/D converter, and a second processor connected to the second processor connected to the second wireless data transmission module. 2. The wireless low-voltage line voltage regulator according to claim 1, wherein an isolation module is connected between the first voltage sensor and the first A/D converter. 3. The wireless low-voltage line voltage regulator according to claim 1, wherein the control unit also includes a human-computer interaction and wireless communication module respectively connected to the first processor, and also includes a first power supply module , which are respectively connected with the first A/D converter, the first processor, the switch control circuit, the human-computer interaction and the communication module. 4. The wireless low-voltage line voltage regulator according to claim 3, wherein the output terminal sampling unit also includes a second power module, and the second power module is connected with the second processor and the second A/D The converter and the third voltage sensor are respectively connected. 5. The wireless low-voltage line voltage regulator according to claim 4, wherein the first power supply module and the second power supply module respectively include a main power supply module and a backup power supply module, and the backup power supply module includes a storage battery , the storage battery is connected with a wind power generation device or a photovoltaic cell assembly. 6. The wireless low-voltage line voltage regulator according to claim 3, wherein the wireless communication module is one of GPRS module, 2G module, 3G module or 4G module.