Power voltage stabilizer

Abstract

The invention belongs to the technical field of power equipment, and relates to a power voltage stabilizer which comprises a voltage regulator and an intelligent monitoring control system connected with the voltage regulator. The voltage regulator comprises an input end and an output end, and the output end is connected with the output end through a coil; the input end is further connected with a second coil, an alternating-current contactor is arranged between the second coil and the coil, the output end is further connected with a third coil, and a second alternating-current contactor is arranged between the third coil and the coil. According to the power voltage stabilizer, the voltage is automatically adjusted to be normal when it is monitored that the power grid voltage rises during solar power generation through the intelligent control system, equipment is automatically cut off when the power grid voltage is normal, and power loss of the power grid cannot be caused.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment and relates to an electric voltage stabilizer. Background Art

[0002] Solar Photovoltaic Network is a professional platform covering many aspects of the solar photovoltaic industry. It provides information on multiple dimensions including technology, application, market and policy. Due to the intermittent and volatile nature of solar power generation: the output power of solar power generation varies with the change of solar irradiance. This intermittent and volatile nature causes grid voltage fluctuations. When the solar irradiance is high, the amount of solar power generation is large, which may cause the grid voltage to increase; when the solar irradiance is low, the amount of solar power generation is small, which may cause the grid voltage to drop.

[0003] That is to say, the connection of solar photovoltaic to the grid will cause the voltage of the low-voltage grid to be unstable. During the day when solar power is generated, the voltage of the low-voltage grid is too high, and the voltage is basically normal at night. Excessive voltage fluctuations will cause damage to users' electrical equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and provide a power voltage stabilizer.

[0005] To achieve the above object, the present invention provides an electric voltage stabilizer, comprising a voltage regulator and an intelligent monitoring and control system connected to the voltage regulator; the voltage regulator comprises an input end and an output end, and the output end and the output end are connected through a coil;

[0006] The input end is also connected to a second coil, and an AC contactor is provided between the second coil and the coil;

[0007] The output end is also connected to a third coil, and a second AC contactor is provided between the third coil and the coil;

[0008] When the intelligent monitoring and control system detects that the input voltage is lower than 360V, the AC contactor is controlled to be attracted, the second coil performs work, and the voltage is output through the second coil and the coil to achieve voltage boost;

[0009] When the intelligent monitoring and control system detects that the input voltage is higher than 405V, the AC contactor is controlled to be disconnected and the second AC contactor is simultaneously closed, and the voltage is output through the coil and the third coil to achieve voltage reduction;

[0010] When the intelligent monitoring and control system detects that the input voltage is 370V-390V, the AC contactor and the second AC contactor are controlled to be disconnected.

[0011] Furthermore, the input voltage of the input end is 345V-450V, the input current is 256-312A, the output voltage is 380V±6%, and the output current is 280A.

[0012] The power voltage stabilizer of the present invention automatically adjusts the voltage to normal when the grid voltage increases during solar power generation through an intelligent control system. When the grid voltage is normal, the device is automatically cut off and no power loss is caused to the grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A circuit diagram schematically shows a power regulator according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0016] Combination Figure 1 As shown, the present invention provides an electric voltage stabilizer, including a voltage regulator and an intelligent monitoring and control system connected to the voltage regulator; the voltage regulator includes an input terminal 1 and an output terminal 2, and the output terminal 1 and the output terminal 2 are connected through a coil 3. The input voltage of the input terminal 1 is 345V-450V, the input current is 256-312A, the output voltage is 380V±6%, and the output current is 280A.

[0017] According to one embodiment of the present invention, the input end 1 is further connected to a second coil 4, and an AC contactor 5 is provided between the second coil 4 and the coil 3. The output end 2 is further connected to a third coil 6, and a second AC contactor 7 is provided between the third coil 6 and the coil 3.

[0018] When the intelligent monitoring and control system detects that the input voltage is lower than 360V, the AC contactor 5 is controlled to be closed, the second coil 4 performs work, and the voltage is output through the second coil 4 and the coil 3 to achieve voltage boost. When the intelligent monitoring and control system detects that the input voltage is higher than 405V, the AC contactor 5 is controlled to be disconnected, and the second AC contactor 7 is attracted at the same time, and the voltage is output through the coil 3 and the third coil 6, and the magnetic field is saturated to achieve voltage reduction. When the intelligent monitoring and control system detects that the input voltage is 370V-390V, the AC contactor 5 and the second AC contactor 7 are controlled to be disconnected, so that no loss is caused to the power grid.

[0019] The power voltage stabilizer of the present invention directly connects the step-down or step-up low-impedance current-beating coil at the input end 1 and the output end 2, without any switching device such as a switch in between, so that the operation is more stable.

[0020] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power voltage stabilizer, characterized in that: It comprises a voltage regulator and an intelligent monitoring and control system connected to the voltage regulator; the voltage regulator comprises an input end (1) and an output end (2), and the output end (1) and the output end (2) are connected via a coil (3); The input end (1) is also connected to a second coil (4), and an AC contactor (5) is provided between the second coil (4) and the coil (3); The output end (2) is also connected to a third coil (6), and a second AC contactor (7) is provided between the third coil (6) and the coil (3); When the intelligent monitoring and control system detects that the input voltage is lower than 360V, the AC contactor (5) is controlled to be closed, the second coil (4) performs work, and the voltage is output through the second coil (4) and the coil (3), thereby achieving voltage boost; When the intelligent monitoring and control system detects that the input voltage is higher than 405V, the AC contactor (5) is controlled to be disconnected and the second AC contactor (7) is simultaneously controlled to be closed, and the voltage is output through the coil (3) and the third coil (6) to achieve voltage reduction; When the intelligent monitoring and control system detects that the input voltage is 370V-390V, the AC contactor (5) and the second AC contactor (7) are controlled to be disconnected.

2. The power stabilizer according to claim 1, characterized in that: The input voltage of the input terminal (1) is 345V-450V, the input current is 256-312A, the output voltage is 380V±6%, and the output current is 280A.

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