Low-voltage treatment rapid regulation and control system based on series voltage compensation control

Abstract

The low-voltage treatment rapid regulation and control system based on series voltage compensation control comprises a commercial power supply line and a load connected in the commercial power supply line, a series voltage compensation system is connected in the commercial power supply line, and the series voltage compensation system and the load are connected in series; the series voltage compensation system comprises a low-voltage line regulator (LVR), and a transformer and a bypass unit which are connected in series with the LVR; wherein the low-voltage line regulator LVR comprises a converter formed by sequentially connecting a rectifier, an inverter and a filter, a controller, a signal acquisition module and a man-machine interaction module; the controller is in communication connection with the signal acquisition module and the man-machine interaction module, and the controller is also in communication connection with the rectifier and the inverter of the converter through the isolation driving module; according to the utility model, the voltage of the whole line can meet the index, and a low-cost solution is provided for solving the problem of low voltage at the tail end of the power distribution network under the long power supply distance.

Description

Technical Field

[0001] The utility model belongs to the technical field of power protection, and in particular relates to a low voltage management rapid control system based on series voltage compensation control. Background Art

[0002] At present, with the continuous increase of residential electrical equipment in rural areas of my country, the time difference of residential electricity consumption is very large, and the problem of voltage instability caused by heavy load during peak hours has gradually emerged. Moreover, the voltage is the guarantee for the safety, efficiency and reliability of electrical equipment.

[0003] At present, the common means to solve the low voltage problem is to increase the capacity of transformers, expand the capacity of transmission lines, extend high-voltage transmission lines further to the vicinity of users, and increase the number and density of distribution transformers. Although this method solves the low voltage problem, the large investment and low equipment utilization rate limit the large-scale promotion of the above methods.

[0004] Therefore, the problem of low voltage management in rural distribution lines has always been an urgent issue to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a low voltage management rapid control system based on series voltage compensation control, which is used to solve the low voltage management problem of rural distribution network lines mentioned in the above background technology.

[0006] The technical solution of the utility model is:

[0007] A low voltage control rapid regulation system based on series voltage compensation control comprises a mains power supply line and a load connected to the mains power supply line, wherein a series voltage compensation system is connected to the mains power supply line, and the series voltage compensation system and the load are in series relationship;

[0008] The series voltage compensation system includes a low voltage line regulator LVR and a transformer and a bypass unit connected in series therewith;

[0009] The low voltage line regulator LVR includes a converter composed of a rectifier, an inverter and a filter connected in sequence, a controller, a signal acquisition module and a human-computer interaction module; the controller is communicatively connected with the signal acquisition module and the human-computer interaction module, and the controller is also communicatively connected with the rectifier and the inverter of the converter through the isolation drive module;

[0010] The signal acquisition module is used to obtain voltage and current information of the mains power line and the load end;

[0011] The human-computer interaction module is used to communicate with the user's smart device to provide the user with the operating status of the low voltage line regulator LVR for viewing and setting;

[0012] The front end of the converter is connected to the rear end of the circuit breaker, the primary coil of the transformer is connected to the filter, one end of the secondary coil of the transformer is connected to the front end of the switching switch, and the other end is connected to the front end of the circuit breaker; the front end of the circuit breaker and the rear end of the switching switch are connected to the mains power supply line;

[0013] The bypass unit includes a bypass switch, one end of which is connected to the front end of the circuit breaker, and the other end of which is connected to the rear end of the switching switch;

[0014] The bypass switch and the switching switch are electrically interlocked.

[0015] Furthermore, the model of the controller is DSP28335 chip.

[0016] Furthermore, the human-computer interaction module is a Bluetooth transceiver module or a wireless transceiver module.

[0017] Furthermore, the isolation drive module uses a high-speed optocoupler TLP5752 as a drive chip.

[0018] Furthermore, a protection module is included, and the protection module is communicatively connected with the controller.

[0019] The utility model adopting the above technical solution can bring the following beneficial effects:

[0020] The low voltage control rapid regulation system based on series voltage compensation control provided by the utility model can achieve the voltage satisfaction index of the entire line, and provide a low-cost solution for the control of low voltage problems at the end of the distribution network under long power supply distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the circuit schematic diagram of the low voltage management rapid control system based on series voltage compensation control of the utility model;

[0022] Figure 2 It is a structural schematic block diagram of a low voltage line regulator LVR.

[0023] In the figure, 1-series voltage compensation system; 11-low voltage line regulator LVR; 12-converter; 13-controller; 14-signal acquisition module; 15-human-machine interaction module; 16-isolation drive module; 17-protection module; 18-on-off switch; 21-transformer; 31-bypass unit; 100-load; 111-rectifier; 121-inverter; 131-filter; 311-bypass switch. DETAILED DESCRIPTION

[0024] A low voltage management rapid control system based on series voltage compensation control, comprising a mains power supply line and a load 100 connected to the mains power supply line, wherein a series voltage compensation system 1 is connected to the mains power supply line, and the series voltage compensation system 1 and the load 100 are in a series relationship;

[0025] The series voltage compensation system 1 comprises a low voltage line regulator LVR11 and a transformer 21 and a bypass unit 31 connected in series therewith;

[0026] The low voltage line regulator LVR11 includes a converter 12, which is composed of a rectifier 111, an inverter 121 and a filter 131 connected in sequence, a controller 13, a signal acquisition module 14 and a human-computer interaction module 15; the controller 13 is communicatively connected with the signal acquisition module 14 and the human-computer interaction module 15, and the controller 13 is also communicatively connected with the rectifier 111 and the inverter 121 of the converter 12 through the isolation drive module 16;

[0027] The signal acquisition module 14 is used to obtain voltage and current information of the mains power line and the load 100;

[0028] The human-computer interaction module 15 is used to communicate with the user's smart device to provide the user with the operating status of the low voltage line regulator LVR11 for viewing and setting;

[0029] The front end of the converter 12 is connected to the rear end of the circuit breaker QF, the primary coil of the transformer 21 is connected to the filter, one end of the secondary coil of the transformer 21 is connected to the front end of the switching switch 18, and the other end is connected to the front end of the circuit breaker QF; the front end of the circuit breaker QF and the rear end of the switching switch 18 are connected to the mains power supply line;

[0030] The bypass unit 31 includes a bypass switch 311, one end of which is connected to the front end of the circuit breaker QF, and the other end is connected to the rear end of the switching switch 18;

[0031] The bypass switch 311 and the switching switch 18 are electrically interlocked, that is, the two cannot be opened or closed at the same time. When the bypass switch 311 is closed, it means that the voltage on the mains circuit and the load 100 is normal. At this time, the load 100 is powered solely by the mains; when the voltage on the mains circuit and the load 100 is abnormal, the switching switch 18 is closed, which is the regulation mode. Part of the energy consumed by the load 100 is provided by the low-voltage line regulator LVR11 through the transformer 21, and the other part is directly obtained from the mains.

[0032] It should be noted that, in this embodiment, the model of the controller 13 is a DSP28335 chip.

[0033] It should be noted that, in this embodiment, the human-computer interaction module 15 is a Bluetooth transceiver module or a wireless transceiver module.

[0034] It should be noted that, in this embodiment, the isolation driving module 16 uses a high-speed optical coupler TLP5752 as a driving chip.

[0035] It should be noted that, in this embodiment, a protection module is also included, which is communicated with the controller. The protection module records overvoltage and undervoltage limit values. When the voltage fluctuation on the AC power circuit and the load 100 detected by the signal acquisition module 14 exceeds the limit value, the switching switch 18 is disconnected to ensure that the low-voltage line regulator LVR11 is not damaged.

[0036] The above description is only a preferred specific implementation mode of the present invention and is not a limitation of the present invention. Any equivalent substitutions and modifications made by those skilled in the art without departing from the guidance of the present invention are deemed to fall within the protection scope of the present invention.

Claims

1. A low voltage control rapid regulation system based on series voltage compensation control, comprising a mains power supply line and a load connected to the mains power supply line, characterized in that: A series voltage compensation system is connected to the mains power supply line, and the series voltage compensation system and the load are in series relationship; The series voltage compensation system includes a low voltage line regulator LVR and a transformer and a bypass unit connected in series therewith; The low voltage line regulator LVR includes a converter composed of a rectifier, an inverter and a filter connected in sequence, a controller, a signal acquisition module and a human-computer interaction module; the controller is communicatively connected with the signal acquisition module and the human-computer interaction module, and the controller is also communicatively connected with the rectifier and the inverter of the converter through the isolation drive module; The signal acquisition module is used to obtain voltage and current information of the mains power line and the load end; The human-computer interaction module is used to communicate with the user's smart device to provide the user with the operating status of the low voltage line regulator LVR for viewing and setting; The front end of the converter is connected to the rear end of the circuit breaker, the primary coil of the transformer is connected to the filter, one end of the secondary coil of the transformer is connected to the front end of the switching switch, and the other end is connected to the front end of the circuit breaker; the front end of the circuit breaker and the rear end of the switching switch are connected to the mains power supply line; The bypass unit includes a bypass switch, one end of which is connected to the front end of the circuit breaker, and the other end of which is connected to the rear end of the switching switch; The bypass switch and the switching switch are electrically interlocked.

2. The low voltage management rapid control system based on series voltage compensation control according to claim 1 is characterized in that: The model of the controller is DSP28335 chip.

3. The low voltage management rapid control system based on series voltage compensation control according to claim 1 is characterized in that: The human-computer interaction module is a Bluetooth transceiver module or a wireless transceiver module.

4. The low voltage management rapid control system based on series voltage compensation control according to claim 1 is characterized in that: The isolation driving module uses a high-speed optical coupler TLP5752 as a driving chip.

5. The low voltage management rapid control system based on series voltage compensation control according to claim 1 is characterized in that: A protection module is also included, and the protection module is communicatively connected with the controller.

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