Wire-phase intelligent voltage regulating device

Abstract

The utility model relates to the technical field of voltage regulating devices, in particular to a line-phase intelligent voltage regulating device. Comprising an intelligent controller, an electric power element, a voltage regulating and stabilizing coil, a wire inlet side terminal and a wire outlet side terminal, two live wires of a power grid distribution line are accessed through the wire inlet side terminal and are connected to the voltage regulating and stabilizing coil, the voltage regulating and stabilizing coil comprises an input winding and an output winding, and the input winding is provided with a plurality of input pile heads; each input pile head is provided with an electric power element, the electric power elements are used for connecting or disconnecting circuit connection of the input pile heads of the voltage regulating and stabilizing coil, and the intelligent controller is used for monitoring input voltage and controlling the electric power elements to be in a starting state or a stopping state according to the input voltage. And the output pile head of the output winding of the voltage regulating and stabilizing coil is connected to the wire outlet side terminal. According to the technical scheme, the voltage can be automatically adjusted according to load changes, manual intervention is reduced, and operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage regulating devices, in particular to a line phase intelligent voltage regulating device. Background Art

[0002] The existing technology mainly has the following problems:

[0003] 1. Replacing distribution network lines requires a large amount of capital investment, a long construction period, high costs, and high coordination difficulties, which makes timely rectification difficult.

[0004] 2. The existing voltage regulation products on the market generally lack intelligent adjustment functions and cannot automatically adjust the voltage according to changes in load. They require manual adjustment on site, which is not only time-consuming and labor-intensive, but also has high operation and maintenance costs. Utility Model Content

[0005] The purpose of the utility model is to propose a line-phase intelligent voltage regulating device, which can automatically adjust the voltage according to load changes, reduce manual intervention, and reduce operation and maintenance costs.

[0006] To achieve the above-mentioned purpose, the basic solution provided by the utility model includes: an intelligent controller, a power element, a voltage regulating and stabilizing coil, an incoming line terminal and an outgoing line terminal; two live wires of the power distribution line of the power grid are connected through the incoming line terminal and connected to the voltage regulating and stabilizing coil, the voltage regulating and stabilizing coil includes an input winding and an output winding, and the input winding is provided with a plurality of input terminals; each input terminal is provided with a power element, and the power element is used to connect or disconnect the circuit connection of each input terminal of the voltage regulating and stabilizing coil, and the intelligent controller is used to monitor the input voltage and control each power element to be in a start state or a stop state according to the input voltage; the output terminal of the output winding of the voltage regulating and stabilizing coil is connected to the outgoing line terminal.

[0007] Principle and beneficial effects of the basic solution: It provides a cost-effective solution with a short construction period and low coordination difficulty, which is suitable for rural power grid transformation to improve power supply capacity and voltage stability. The device is easy to install and maintain, does not require additional lines, is suitable for various power grid environments, and has good versatility and adaptability.

[0008] This technical solution combines the real-time monitoring and intelligent control of the input voltage by the voltage regulating and stabilizing coil and the intelligent controller. The intelligent controller starts different power components so that the input current passes through the voltage regulating and stabilizing coil input windings of different numbers of coils, thereby adjusting the working state of the voltage regulating and stabilizing coil to achieve different levels of voltage regulation, ensuring that the final output voltage is stable and reliable. The intelligent controller realizes automatic voltage regulation, reduces manual intervention, and significantly reduces operation and maintenance costs.

[0009] As an implementable preferred solution, the power element is one of an AC contactor, a relay, a solid-state relay or a thyristor.

[0010] As an implementable preferred solution, it also includes an overcurrent protector, which is arranged on the outgoing line side and is used to monitor the device current and provide line disconnection protection when the line current exceeds the rated value.

[0011] As an implementable preferred solution, it also includes a switching element, which is arranged on the incoming line side.

[0012] As an implementable preferred solution, the switch element is one of a miniature fuse, a molded case circuit breaker, a disconnector, a fusible switch or a fuse.

[0013] As an implementable preferred solution, a fuse is also included to quickly cut off the circuit when an overload or short circuit occurs in the circuit.

[0014] As an implementable preferred solution, it also includes an overvoltage protector, which is arranged on the output line side and is used to monitor the voltage and provide line break protection when overvoltage occurs on the output side.

[0015] As an implementable preferred solution, the components of the device are connected by copper wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a primary circuit schematic diagram of a line-phase intelligent voltage regulating device.

[0017] Figure 2 It is a schematic diagram of the secondary circuit (control loop) of a line-phase intelligent voltage regulating device. DETAILED DESCRIPTION

[0018] The technical solution of this application is further described in detail below through specific implementation methods:

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection (including various mechanical connection forms, such as couplings or gear pairs, etc.), or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] A line-phase intelligent voltage regulating device changes the original "one live and one zero" distribution line on the power supply side into "two live lines" to adapt to more complex voltage regulation needs. The intelligent voltage regulating device is connected in series at the end of the distribution line. The device is directly connected to the main distribution line instead of to the branch line (there is no household line hanging in front of the device). It includes a voltage regulating and stabilizing coil, an intelligent controller, an overcurrent protector, power elements, switch elements, an overcurrent protector, incoming line terminals and outgoing line terminals. Copper wires are preferably used to connect the components.

[0021] Reference Figure 1 The voltage regulating and stabilizing coil BK is used to convert different levels of input voltage into a stable output voltage, including an input winding and an output winding. The input winding includes one or more input terminals (taps), each of which is provided with a power element. The number and position of the input terminals can be set according to actual needs. In this embodiment, the input winding includes three input terminals, which are evenly distributed on the input winding, so as to perform three different levels of voltage regulation.

[0022] In other embodiments, the voltage regulating and stabilizing coil can be set to multiple combinations according to actual conditions, such as a combination of multiple input terminals and one output terminal, a combination of one input terminal and one or more output terminals, or a combination of multiple input terminals and multiple output terminals.

[0023] The power element is used to connect or disconnect the circuit connection of each input terminal of the voltage regulating and stabilizing coil BK. The number of power elements is the same as the number of input terminals to adapt to different voltage inputs. In this embodiment, three power elements KM1, KM2, and KM3 are included. The power element can be an AC contactor, a relay, a solid-state relay, or a thyristor.

[0024] Reference Figure 2 , the power element is connected to each control level output end of the intelligent controller. The intelligent controller is used to monitor the input voltage and intelligently adjust the start and stop of the power element, thereby adjusting the working state of the voltage regulating and stabilizing coil BK to ensure the stability of the output voltage. In this embodiment, the intelligent controller adopts a voltage controller of model PVKZQ-3. In this embodiment, starting the power element KM3 allows the input current to pass through the coil of 1 / 3 of the input winding of the voltage regulating and stabilizing coil BK, starting the power element KM3 allows the input current to pass through the coil of 2 / 3 of the input winding of the voltage regulating and stabilizing coil BK, and starting the power element KM3 allows the input current to pass through all the coils of the input winding of the voltage regulating and stabilizing coil BK, thereby achieving different levels of voltage regulation by adjusting the working state of the voltage regulating and stabilizing coil BK.

[0025] The overcurrent protector PH is used to monitor the device current and the output side voltage. When the line current exceeds the rated value, it provides line break protection and can automatically reset after a delay. In one embodiment, the overcurrent protector is arranged on the neutral line of the output side terminal.

[0026] The switch element QF serves as the main switch of the entire device and is used to control the on and off of the power supply of the voltage regulating device. The switch element can be one of a miniature fuse, a molded case circuit breaker, an isolating switch, a fuse switch or a fuse, and is set on the incoming line side.

[0027] The incoming line terminals and outgoing line terminals are used to connect the power distribution lines of the power grid with the line-phase intelligent voltage regulating device to ensure the input and output of current.

[0028] It also includes a number of fuses. In this embodiment, three fuses are provided, namely FU1, FU2 and FU3, which are used to quickly cut off the current when an overload or short circuit fault occurs in the circuit, thereby protecting other components in the circuit from damage.

[0029] The two live wires of the power distribution line of the power grid are connected through the incoming line terminals of the device, and then connected to the power components after passing through the switching element QF.

[0030] The power components KM1, KM2, and KM3 are connected to the input terminals (taps) of the input windings of the voltage regulating and stabilizing coil BK to form a current path.

[0031] The output terminal of the voltage regulating and stabilizing coil BK is connected to the outgoing line terminal of the device through an overcurrent protector, and finally provides a stable voltage to the user.

[0032] It also includes an overvoltage protector KV, which is connected in parallel to the outgoing line terminals to protect equipment or circuits from damage due to overvoltage (such as surge, spike or continuous high voltage).

[0033] When the power distribution line is connected to the line-phase intelligent voltage regulator, the switch element acts as the master switch to ensure the safety of the circuit. The intelligent controller (PVKZQ-3 voltage controller) continuously monitors the input voltage level. Once it detects that the voltage fluctuation exceeds the preset range, it will send a control level signal to intelligently start or stop each power element, thereby changing the working state of the voltage regulating coil BK to ensure that the voltage received by the end user is stable and reliable. At the same time, the overcurrent protector plays a protective role in the whole process to avoid circuit damage caused by overcurrent.

[0034] The above contents are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A line phase intelligent voltage regulating device, characterized in that: It includes an intelligent controller, power elements, a voltage regulating and stabilizing coil, an incoming line terminal and an outgoing line terminal; two live wires of the power distribution line of the power grid are connected through the incoming line terminal and connected to the voltage regulating and stabilizing coil, the voltage regulating and stabilizing coil includes an input winding and an output winding, and the input winding is provided with a plurality of input terminals; each input terminal is provided with a power element, and the power element is used to connect or disconnect the circuit connection of each input terminal of the voltage regulating and stabilizing coil, and the intelligent controller is used to monitor the input voltage and control each power element to be in a start state or a stop state according to the input voltage; the output terminal of the output winding of the voltage regulating and stabilizing coil is connected to the outgoing line terminal.

2. The line phase intelligent voltage regulating device according to claim 1, characterized in that: The power element is one of an AC contactor, a relay, a solid-state relay or a thyristor.

3. The line phase intelligent voltage regulating device according to claim 1, characterized in that: It also includes an overcurrent protector, which is arranged on the outgoing line side and is used to monitor the device current and provide line disconnection protection when the line current exceeds the rated value.

4. The line phase intelligent voltage regulating device according to claim 1, characterized in that: It also includes a switch element, which is arranged on the incoming line side.

5. The line phase intelligent voltage regulating device according to claim 4, characterized in that: The switch element is one of a miniature fuse, a molded case circuit breaker, an isolating switch, a fusible switch or a fuse.

6. The line phase intelligent voltage regulating device according to claim 1, characterized in that: It also includes fuses, which are used to quickly cut off the circuit when an overload or short circuit fault occurs in the circuit.

7. The line phase intelligent voltage regulating device according to claim 1, characterized in that: It also includes an overvoltage protector, which is arranged on the output side and is used to monitor the voltage and provide line break protection when overvoltage occurs on the output side.

8. The line phase intelligent voltage regulating device according to claim 1, characterized in that: Copper wires are used to connect the various components of the device.

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