Power quality dnv voltage distortion elimination stabilizer and sampling circuit

Abstract

The utility model discloses a kind of electric energy quality DNV voltage distortion rate elimination stabilizer and sampling circuit, including load equipment and for the DVA voltage stabilizer on the load equipment, still including with the DVA voltage stabilizer and the load equipment electric connection A circuit, B circuit, C circuit and N circuit.The beneficial effect of the utility model is: through filter current transformer, voltage stabilizer current transformer and DVA voltage stabilizer, realize the process in the use of load equipment, inhibit load equipment dynamic and steady-state voltage drop and voltage variable, eliminate surge, eliminate voltage flicker, with good dynamic voltage stability capacity, output voltage reaches precision ±1% -5% adjustable, can effectively filter each harmonic, three-phase unbalance, improve power factor, improve power supply electric energy quality, and harmonic elimination stabilizer has ideal energy-saving effect, between 1-8% in different field energy-saving effect.

Description

Technical Field

[0001] This utility model relates to the field of power technology, specifically to a power quality DNV voltage distortion rate elimination stabilizer and sampling circuit. Background Technology

[0002] Voltage waveform distortion rate, also known as total harmonic distortion rate, is an important indicator used to measure the harmonic content of voltage in a power system. It reflects the severity of harmonic pollution of the power grid by the load and the amount of harmonics emitted by power equipment.

[0003] Excessive total voltage distortion presents the following problems:

[0004] 1. Excessive harmonic current in the load equipment and excessively high harmonic voltages of each order result in excessively high total voltage harmonic distortion.

[0005] 2. Background harmonic voltage: Harmonic voltages of different higher orders in the power grid, and excessively high power supply background voltage distortion caused by voltage equipotential feedback to the low-voltage side.

[0006] 3. The grid connection of different new energy power generation such as photovoltaic, wind power, and energy storage can cause voltage fluctuations due to unstable grid connection voltage, resulting in voltage waveform distortion and excessively high voltage distortion rate. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and to provide a power quality DNV voltage distortion rate elimination stabilizer and sampling circuit.

[0008] In a first aspect, this utility model provides a power quality DNV voltage distortion rate elimination stabilizer, including a load device and a DVA voltage stabilizer for the load device, and further including an A circuit, a B circuit, a C circuit and an N circuit electrically connected to the DVA voltage stabilizer and the load device.

[0009] The input terminal of the DVA voltage stabilizer is electrically connected to a voltage regulator current transformer and a filter current transformer via circuits A, B, and C. The output terminal of the filter current transformer is electrically connected to the input terminal of the voltage regulator current transformer.

[0010] Furthermore, a first input switch is electrically connected between the voltage regulator current transformer and the filter current transformer, and the input terminal of the first input switch is connected to the filter current transformer / the output terminal is connected to the voltage regulator current transformer.

[0011] Furthermore, an outgoing switch is electrically connected between the DVA voltage stabilizer and the load device, with the output terminal of the outgoing switch connected to the load device and the input terminal connected to the DVA voltage stabilizer.

[0012] Furthermore, circuits A, B, and C branch off into a first branch between the first incoming switch and the filter current transformer, and also branch off into a first branch between the outgoing switch and the load device. A bypass / maintenance switch is electrically connected between the two first branches.

[0013] Furthermore, circuits A, B, and C branch off into a second branch between the first incoming switch and the filter current transformer, and circuit N branches off into a third branch at the input terminal of the DVA voltage stabilizer.

[0014] Furthermore, one end of the second branch is electrically connected to a second incoming switch, and the output end of the second incoming switch is connected to multiple modules.

[0015] Furthermore, a current transformer body is electrically connected between the third branch and the plurality of modules.

[0016] Secondly, this utility model also proposes a sampling circuit for a power quality DNV voltage distortion rate elimination stabilizer, including any of the above-mentioned power quality DNV voltage distortion rate elimination stabilizers. The sampling circuit includes a compensation transformer and a sampling transformer electrically connected to the compensation transformer.

[0017] Furthermore, the compensation transformer and the sampling transformer are electrically connected through circuits A, B, C, and N.

[0018] Compared with the prior art, the advantages of this utility model are as follows: By using a filter current transformer, a voltage regulator current transformer, and a DVA voltage stabilizer, the load equipment can suppress dynamic and steady-state voltage drops and voltage spikes, eliminate surges, and eliminate voltage flicker during use. It has good dynamic voltage stability capability, and the output voltage is adjustable with an accuracy of ±1%-5%. It can effectively filter various harmonics and three-phase imbalances, improve the power factor, and improve the power supply quality. The harmonic suppression stabilizer has an ideal energy-saving effect, with energy saving effects ranging from 1% to 8% in different site conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall flow circuit in this utility model.

[0020] Figure 2 This is a schematic diagram of the overall circuit of this utility model.

[0021] Figure 3 This is a schematic diagram of the circuit used in this utility model.

[0022] In the picture:

[0023] 1. Filter current transformer;

[0024] 2. First incoming line switch;

[0025] 3. Voltage regulator current transformer;

[0026] 4. DVA voltage stabilizer;

[0027] 5. Outgoing switch;

[0028] 6. Loading equipment;

[0029] 7. Bypass / maintenance switch;

[0030] 8. Second incoming line switch;

[0031] 9. Modules;

[0032] 10. Current transformer body. Detailed Implementation

[0033] Referring now to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the described embodiments. Rather, it is intended to cover variations, modifications, and equivalents included within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0034] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Note: The examples described below are merely specific examples and are not intended to limit the embodiments of this utility model to the specific steps, values, conditions, data, order, etc. Those skilled in the art can utilize the concept of this utility model to construct more embodiments not mentioned herein by reading this specification.

[0036] Excessive total voltage distortion presents the following problems: 1. Excessive harmonic current in the load equipment, resulting in excessively high harmonic voltage across different harmonic orders, leading to excessively high total voltage harmonic distortion; 2. Background harmonic voltage, including different high-order harmonic voltages from the power grid, causing excessively high background voltage distortion due to voltage equipotential feedback to the low-voltage side; 3. Voltage fluctuations caused by unstable grid connection voltage from various new energy power generation sources such as photovoltaics, wind power, and energy storage, resulting in voltage waveform distortion and excessively high voltage distortion.

[0037] To address the aforementioned problems with electrical energy, this invention proposes a power quality (DNV) voltage distortion rate elimination stabilizer and sampling circuit.

[0038] In this embodiment, please refer to Figure 1 and Figure 2 A power quality (DNV) voltage distortion rate elimination stabilizer is provided, including a load device 6 and a DVA voltage stabilizer 4 for the load device 6. It also includes an A circuit, a B circuit, a C circuit, and an N circuit electrically connected to the DVA voltage stabilizer 4 and the load device 6. The input terminal of the DVA voltage stabilizer 4 is electrically connected to a voltage regulator current transformer 3 and a filter current transformer 1 via the A, B, and C circuits. The output terminal of the filter current transformer 1 is electrically connected to the input terminal of the voltage regulator current transformer 3. A first input switch 2 is electrically connected between the voltage regulator current transformer 3 and the filter current transformer 1. The input terminal of the first input switch 2 is connected to the filter current transformer 1, and its output terminal is connected to the voltage regulator current transformer 3.

[0039] like Figure 1 and Figure 2 As shown, the DVA voltage stabilizer 4 is connected to the load device 6 through circuits A, B, C, and N. A filter current transformer 1 and a voltage regulator current transformer 3 are connected in series on circuits A, B, and C, allowing current to flow through these components into the load device 6. This suppresses dynamic and steady-state voltage drops and spikes, eliminates surges and flicker, and provides excellent dynamic voltage stability. The output voltage is adjustable with an accuracy of ±1%-5%. It effectively filters harmonics and three-phase imbalances, improves the power factor, and enhances power quality. The harmonic stabilizer offers ideal energy-saving effects, resulting in energy savings of 1-8% for the load device 6 in different environments.

[0040] Specifically, an outgoing switch 5 is electrically connected between the DVA voltage stabilizer 4 and the load device 6. The output terminal of the outgoing switch 5 is connected to the load device 6, and the input terminal is connected to the DVA voltage stabilizer 4.

[0041] Please continue reading. Figure 1 and Figure 2 Circuits A, B, and C branch off from the first incoming switch 2 and the filter current transformer 1, and also branch off from the first outgoing switch 5 and the load device 6. A bypass / maintenance switch 7 is electrically connected between the two first branches.

[0042] like Figure 1 and Figure 2 As shown, when it is necessary to maintain the equipment on the main line, the bypass / maintenance switch 7 should be opened, and the incoming and outgoing switches 5 must be disconnected before closing the switch, so as to facilitate maintenance and repair.

[0043] In some embodiments, circuits A, B, and C are branched off into a second branch between the first input switch 2 and the filter current transformer 1, and circuit N is branched off into a third branch at the input of the DVA voltage stabilizer 4. One end of the second branch is electrically connected to the second input switch 8, and the output of the second input switch 8 is connected to multiple modules 9. The third branch and the multiple modules 9 are electrically connected to the current transformer body 10.

[0044] In this embodiment, please refer to Figure 3 Furthermore, a sampling circuit for a power quality DNV voltage distortion rate elimination stabilizer is proposed, including a power quality DNV voltage distortion rate elimination stabilizer. The sampling circuit includes a compensation transformer and a sampling transformer electrically connected to the compensation transformer. The compensation transformer and the sampling transformer are electrically connected through circuits A, B, C, and N.

[0045] like Figure 3 As shown, the power supply is transformed by a compensation transformer to supply different IGBT inverters at different stages, and the output phase difference is the sum of the values ​​of several outputs.

[0046] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A power quality DNV voltage distortion elimination stabilizer comprising a load device (6) and a DVA voltage stabilizer (4) for said load device (6), characterized in that, It also includes circuits A, B, C and N that are electrically connected to the DVA voltage stabilizer (4) and the load device (6); The input terminal of the DVA voltage stabilizer (4) is electrically connected to the voltage regulator current transformer (3) and the filter current transformer (1) through circuits A, B and C. The output terminal of the filter current transformer (1) is electrically connected to the input terminal of the voltage regulator current transformer (3).

2. The power quality DNV voltage distortion canceling stabilizer of claim 1, wherein, A first input switch (2) is electrically connected between the voltage regulator current transformer (3) and the filter current transformer (1). The input terminal of the first input switch (2) is connected to the filter current transformer (1) and the output terminal is connected to the voltage regulator current transformer (3).

3. The power quality DNV voltage distortion rate elimination stabilizer as described in claim 1, characterized in that, A line switch (5) is electrically connected between the DVA voltage stabilizer (4) and the load device (6). The output terminal of the line switch (5) is connected to the load device (6) and the input terminal is connected to the DVA voltage stabilizer (4).

4. The power quality DNV voltage distortion rate elimination stabilizer as described in claim 3, characterized in that, The A circuit, B circuit and C circuit are branched off between the first incoming switch (2) and the filter current transformer (1) / and are also branched off between the outgoing switch (5) and the load device (6). A bypass / maintenance switch (7) is electrically connected between the two first branches.

5. The power quality DNV voltage distortion rate elimination stabilizer as described in claim 1, characterized in that, The A circuit, B circuit and C circuit are located between the first incoming switch (2) and the filter current transformer (1) and branch off into a second branch. The N circuit is located at the input terminal of the DVA voltage stabilizer (4) and branch off into a third branch.

6. The power quality DNV voltage distortion rate elimination stabilizer as described in claim 5, characterized in that, One end of the second branch is electrically connected to a second incoming switch (8), and the output end of the second incoming switch (8) is connected to multiple modules (9).

7. The power quality DNV voltage distortion rate elimination stabilizer as described in claim 6, characterized in that, A current transformer body (10) is electrically connected between the third branch and the plurality of modules (9).

8. A sampling circuit for a power quality (DNV) voltage distortion rate elimination stabilizer, characterized in that, The power quality DNV voltage distortion rate elimination stabilizer, as described in any one of claims 1-7, wherein the sampling circuit includes a compensation transformer and a sampling transformer electrically connected to the compensation transformer.

9. The sampling circuit of the power quality DNV voltage distortion rate elimination stabilizer as described in claim 8, characterized in that, The compensation transformer and the sampling transformer are electrically connected through circuits A, B, C and N.

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