Novel all-round mass processor

Abstract

The utility model discloses a novel all-round quality processor which comprises a high-frequency filter, a circuit A, a circuit B and a circuit C, wherein the circuit A, the circuit B and the circuit C are electrically connected with the high-frequency filter. The circuit A, the circuit B and the circuit C are connected to the output end of the high-frequency filter and are equally divided into branches, and the branches of the circuit A, the circuit B and the circuit C are electrically connected with resistors for resistance-capacitance absorption. The beneficial effects of the utility model are that through the high-frequency filter and the resistors connected in parallel, the novel all-round quality processor realizes harmonic control, reactive compensation, three-phase imbalance compensation, zero sequence current elimination, and elimination of 50-100 higher harmonics of electric energy quality, thereby reducing higher harmonic current interference of a power grid; and compared with a traditional APF active filter, the novel all-round quality processor has a zero-sequence current processing function and a 50-100 higher harmonic elimination function.

Description

Technical Field

[0001] This utility model relates to the field of power quality technology, specifically to a novel all-around power quality processor. Background Technology

[0002] To address the shortcomings of traditional APF active power filters in controlling harmonics with small functions and ineffective zero-sequence current elimination, as well as their limitations in handling high-order harmonic currents with reactive power, a new all-around quality processor has been developed. This processor adds a high-IC filter branch and a PFC DC filter branch, and designs a new IC and PFC filter branch to better eliminate harmonic currents with small functions and eliminate high-order harmonics between the 50th and 100th orders. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a novel all-around quality processor.

[0004] Includes a high-frequency filter and circuits A, B, and C electrically connected to the high-frequency filter;

[0005] Circuits A, B, and C are each connected to a branch at the output of the high-frequency filter, and each branch of circuits A, B, and C is electrically connected to a resistor for RC absorption.

[0006] Furthermore, a branch switch is provided between the branch and the resistor in the A circuit, the B circuit, and the C circuit.

[0007] Furthermore, the branch switch and the resistor are connected in parallel to the main circuits of circuits A, B, and C.

[0008] Furthermore, the output terminal of the high-frequency filter is connected to an output switch via the A circuit, the B circuit, and the C circuit.

[0009] Furthermore, the A circuit, B circuit, and C circuit at the input terminal of the high-frequency filter are powered on and connected to an input switch and a capacitor.

[0010] Furthermore, the input terminal of the capacitor is connected to the input switch through the A circuit, the B circuit, and the C circuit, and the output terminal of the capacitor is connected to the high-frequency filter through the A circuit, the B circuit, and the C circuit.

[0011] Compared with the prior art, the advantages of this utility model are as follows: By using a high-frequency filter and parallel resistors, a new type of all-around power quality processor is realized to perform harmonic control, reactive power compensation, three-phase imbalance compensation, elimination of zero-sequence current, and elimination of high-order harmonics between the 50th and 100th orders, thereby reducing the interference of high-order harmonic currents in the power grid; and the new all-around power quality processor adds zero-sequence current processing function and high-order harmonic elimination function between the 50th and 100th orders compared with the traditional APF active filter. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall circuit flow in this utility model.

[0013] Figure 2 This utility model Figure 1 Circuit diagram.

[0014] Figure 3 This utility model Figure 2 Schematic diagram of working principle.

[0015] Figure 4 This is a schematic diagram illustrating the working principle of the filter in this utility model.

[0016] Figure 5 This is a schematic diagram of the unit composition in this utility model.

[0017] In the picture:

[0018] 1. Incoming line switch;

[0019] 2. Capacitors;

[0020] 3. High-frequency filter;

[0021] 4. Outgoing switch;

[0022] 5. Branch circuit switches;

[0023] 6. Resistor components. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] To address the shortcomings of traditional APF active power filters in controlling harmonics with small functions and ineffective zero-sequence current elimination, as well as their limitations in handling high-order harmonic currents with reactive power, a new all-around quality processor has been developed. This processor adds a high-IC filter branch and a PFC DC filter branch, and designs a new IC and PFC filter branch to better eliminate harmonic currents with small functions and eliminate high-order harmonics between the 50th and 100th orders.

[0028] In order to solve the above-mentioned problems with power quality, this utility model proposes a novel all-around power quality processor.

[0029] Please see Figure 1 and Figure 2 It includes a high-frequency filter 3 and circuits A, B, and C electrically connected to the high-frequency filter 3; each of circuits A, B, and C branches off from the output terminal of the high-frequency filter 3; each branch of circuits A, B, and C is electrically connected to a resistor 6 for RC absorption; a branch switch 5 is provided between the branch of circuits A, B, and C and the resistor 6; the branch switch 5 and the resistor 6 are connected in parallel to the main circuit of circuits A, B, and C.

[0030] like Figure 1 and Figure 2 As shown, the new all-around quality processor is composed of a series high-frequency filter 3 (IC filter circuit) and a parallel resistor 6 (PFC with different resistance values), which changes the rectifier filter circuit and adds a high-pass filter circuit to better eliminate high-order harmonic currents in the rectifier circuit.

[0031] Specifically, the circuit consists of three circuits: A, B, and C. All three circuits are arranged in the same direction and connected to each component in the same direction. Furthermore, some components are arranged in the same quantity as those in circuits A, B, and C, and are located on the main and branch lines of circuits A, B, and C to ensure the normal flow and use of current.

[0032] In some embodiments, please refer to Figure 3 By using series IC filter circuits and parallel PFC with different resistor values, harmonic currents of small and high-order harmonics are eliminated. Figure 3The leftmost diagram shows a single-phase equivalent circuit, while the two diagrams on the right show current leading and current lagging circuits, respectively. Figure 1 , 2 Working principle diagram.

[0033] Please see Figure 1 and Figure 2 The output of the high-frequency filter 3 is connected to the output switch 4 through circuits A, B and C. The main circuits A, B and C of the input of the high-frequency filter 3 are connected to the input switch 1 and capacitor 2. The input of capacitor 2 is connected to the input switch 1 through circuits A, B and C, and the output of capacitor 2 is connected to the high-frequency filter 3 through circuits A, B and C.

[0034] like Figure 1 and Figure 2 As shown, the outgoing switch 4, incoming switch 1, and branch switch 5 control the opening and closing of the current in circuits A, B, and C. The number of outgoing switches 4, incoming switches 1, and branch switches 5 is set according to the number of circuits A, B, and C, and they are connected one-to-one. They can control the opening and closing of each component by controlling the outgoing switches 4, incoming switches 1, and branch switches 5.

[0035] In some embodiments, please refer to Figure 4 ,as follows:

[0036] Is = I L +Ic (1)

[0037] I L = I Lfp+ + I Lfq+ + I Lf- + I Lh (2)

[0038] In order to ensure that the power supply current Is does not contain fundamental positive sequence reactive and fundamental negative sequence current, the DNA output current Ic needs to be controlled to satisfy equation (3). In this way, the power supply current will only contain fundamental positive sequence active and harmonic current, as shown in equation (4).

[0039] Ic = -( I Lfp+ + I Lf- (3)

[0040] Is = (I) Lfp+ + I Lh (4).

[0041] In other embodiments, please refer to Figure 5The main circuit of the system adopts a chain-type series structure. Each phase consists of N power units as shown in the figure, and a redundant design is adopted. The power units use high-power power electronic devices (such as IGBTs) that can be turned off to form a bridge circuit. Its output voltage is a stepped wave synthesized from multiple level steps. The voltage stress on the switching devices is small, avoiding problems caused by large dv / dt.

[0042] 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.

[0043] 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.

[0044] 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 new all-powerful quality processor, characterized by, The high-frequency filter (3) is connected with A circuit, B circuit and C circuit. The A circuit, B circuit and C circuit are connected with the high-frequency filter (3) output end branch, and the A circuit, B circuit and C circuit branch are connected with resistance (6) for blocking capacity absorption.

2. The new all-purpose quality processor as claimed in claim 1, wherein, The A circuit, B circuit and C circuit branch and the resistance (6) are connected with branch switch (5).

3. The new and improved universal mass processor of claim 2, wherein, The branch switch (5) and the resistance (6) are connected with the A circuit, B circuit and C circuit main road in parallel.

4. The new and improved universal mass processor of claim 1, wherein, The high-frequency filter (3) output end is connected with outlet switch (4) through the A circuit, B circuit and C circuit.

5. The new and improved universal mass processor as defined in claim 1, wherein, The A circuit, B circuit and C circuit main road of the high-frequency filter (3) input end are connected with incoming line switch (1) and capacitor (2).

6. The new and improved mass quality processor of claim 5, wherein, The capacitor (2) input end is connected with the incoming line switch (1) through the A circuit, B circuit and C circuit, and the capacitor (2) output end is connected with the high-frequency filter (3) through the A circuit, B circuit and C circuit.

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