An intelligent control device for optimizing electric energy

Abstract

The present invention discloses an intelligent control device for optimizing electric energy, comprising an intelligent controller, a mutual inductor, a plurality of inductors and a plurality of switching switches, wherein the mutual inductor is arranged on the existing three-phase circuit L1 line, a voltage detection unit is arranged in the intelligent controller, and the voltage detection unit is electrically connected to the existing three-phase circuit L2 and L3 lines, and a current detection unit is arranged on the intelligent controller, and the current detection unit is electrically connected to the mutual inductor, and is used to collect and detect the current generated by the mutual inductor, and obtain the phase difference by calculating the waveform of the voltage and the current, so as to determine the parameters of the inductor that should be switched, and then control the corresponding inductor to be connected to the three-phase circuit through the output of the multi-channel output control interface. The present invention can block the reactive current entering the resonance zone outside the zone to avoid the disturbance to the resonance zone, and is also conducive to the control of the parameters of the electric optimizer in the resonance zone and maintain the stability of the resonance zone.

Description

Technical Field

[0001] The present invention relates to the field of power grid equipment, and in particular to an intelligent control device for optimizing electric energy. Background Art

[0002] The existing energy saving is to install power optimizers to save energy in circuits. Figure 3 In the situation shown in the figure, the 1#, 2#, and 3# areas may be three different units. They have their own electricity meters for electricity measurement, and each has the right to choose whether to carry out energy-saving transformation. If an electric optimizer is installed in the 1# area to achieve resonance in the area, the reactive current generated in the area can be controlled within the area. However, since the 2# and 3# areas may not belong to this unit, it is not certain whether they have installed electric optimizers, so a large amount of reactive current is injected into the power grid, as shown by arrows ① and ② in the figure. Both currents flow partly into the left ③ and partly into the right ④. The left side will flow into ⑤, that is, the power supply part (including transformer and capacitor cabinet). The right side is ④, that is, the two streams merge and enter the 1# resonance area, thereby affecting the detection and parameter adjustment of the resonance control, disrupting the normal working state, and even causing oscillation, seriously affecting the stability of the power grid. On the other hand, since this part is reactive current, it can cause the current of the internal line of the resonance area to increase, the heat loss to increase, the pressure difference to increase, and finally cause the output of the motor to decrease, which is very unfavorable for energy saving. Therefore, we make improvements to this and propose an intelligent control device for power optimization. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0004] The present invention discloses an intelligent control device for optimizing electric energy, comprising an intelligent controller, a mutual inductor, a plurality of inductors and a plurality of switching switches, wherein the mutual inductor is arranged on an existing three-phase circuit L1 line, the intelligent controller is provided with a voltage detection unit, the voltage detection unit is electrically connected to the existing three-phase circuit L2 and L3 lines, and is used to collect and detect the voltage on the three-phase circuit L2 and L3 lines, the intelligent controller is provided with a current detection unit, the current detection unit is electrically connected to the mutual inductor, and is used to collect and detect the current generated by the mutual inductor, the intelligent controller is provided with a central processing control module, the intelligent controller is also provided with a multi-channel output control interface, each of the inductors is electrically connected to the three-phase circuit L1, L2 and L3 lines via a switching switch; wherein the plurality of inductors are respectively recorded as S1, S2, S3...Sn; the plurality of switching switches are respectively recorded as J1, J2, J3...Jn;

[0005] The current detection unit, the voltage detection unit and the multi-channel output control interface are all electrically connected to the central processing control module. The central processing control module controls the switching switch through the multi-channel output control interface according to the current and voltage information received from the current detection unit and the voltage detection unit, and connects or exits the corresponding inductor from the three-phase circuit;

[0006] The control method of the central processing control module is to obtain the phase difference through the waveform calculation of the voltage and current, thereby determining the parameters of the inductor that should be switched, and then control the output of the multi-channel output control interface to control the corresponding inductor to be connected to the three-phase circuit.

[0007] As a preferred technical solution of the present invention, the control method of the central processing control module is, specifically, to obtain a phase difference by calculating the waveforms of voltage and current, and when the phase difference φ is less than zero, that is, a negative value, that is, the current leads the voltage, the number of inductors input is increased through the output of the multi-channel output control interface until the phase difference φ is zero;

[0008] When the phase difference φ is greater than zero, that is, it is positive, that is, the current lags behind the voltage, then the number of inductors put into operation is reduced through the output of the multi-channel output control interface until the phase difference φ is zero or all inductors are withdrawn.

[0009] As a preferred technical solution of the present invention, when the phase difference φ jumps between positive and negative, it means that the adjustment amount is too large or the network changes frequently. After jumping N times, the inductor input is not increased, and detection is continued after a period of time T.

[0010] As a preferred technical solution of the present invention, the installation position of the power optimization intelligent control device is close to the electrical equipment.

[0011] As a preferred technical solution of the present invention, a microcomputer is provided inside the intelligent controller, and the microcomputer is used to monitor the automatic dynamics of the intelligent controller and adjust internal parameters.

[0012] The beneficial effects of the present invention are:

[0013] This type of power optimization intelligent control device calculates the phase difference through the waveform of voltage and current. When the phase difference φ is less than zero, that is, a negative value, that is, the current leads the voltage, the number of inductors invested is increased through the output of the multi-channel output control interface until the phase difference φ is zero; when the phase difference φ is greater than zero, that is, positive, that is, the current lags behind the voltage, the number of inductors invested is reduced through the output of the multi-channel output control interface until the phase difference φ is zero or all inductors are withdrawn; thereby balancing the current and changing the voltage quality at the end of the line. It improves the power factor and has the advantages of low investment, good effect, small size, easy installation, maintenance-free, stable performance, etc. It effectively improves the stability and reliability of equipment operation, reduces equipment failures and accidents, and extends the service life of the equipment. It has a very significant effect on energy saving and reducing energy loss. In addition, the reactive current entering the resonance zone can be blocked outside the area to prevent it from disturbing the resonance zone, which is also conducive to the control of the parameters of the power optimizer in the resonance zone and maintaining the stability of the resonance zone. This effectively avoids the increase of current in the internal circuits of the resonance area, increased heat loss, increased pressure difference, and ultimately reduced output of the motor, which is very unfavorable to energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of an electric energy optimization intelligent control device of the present invention;

[0016] Figure 2 It is a schematic diagram of the installation of an electric energy optimization intelligent control device of the present invention;

[0017] Figure 3 It is a general circuit diagram of the installation and use environment of the present invention.

[0018] In the figure: 1. Intelligent controller; 2. Mutual inductor; 3. Inductor; 4. Switch; 5. Voltage detection unit; 6. Current detection unit; 7. Central processing control module; 8. Multi-channel output control interface. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] Example: Figure 1 , Figure 2The present invention provides an electric energy optimization intelligent control device, comprising an intelligent controller 1, a mutual inductor 2, a plurality of inductors 3 and a plurality of switching switches 4, wherein the mutual inductor 2 is arranged on an existing three-phase circuit L1 line, a voltage detection unit 5 is arranged in the intelligent controller 1, and the voltage detection unit 5 is electrically connected to the existing three-phase circuit L2 and L3 lines, and is used to collect and detect the voltage on the three-phase circuit L2 and L3 lines, a current detection unit 6 is arranged on the intelligent controller 1, and the current detection unit 6 is electrically connected to the mutual inductor 2, and is used to collect and detect the current generated by the mutual inductor 2, a central processing control module 7 is arranged in the intelligent controller 1, and a multi-channel output control interface 8 is also arranged on the intelligent controller 1, and each of the inductors 3 is electrically connected to the three-phase circuit L1, L2 and L3 lines via a switching switch 4; wherein the plurality of inductors 3 are respectively recorded as S1, S2, S3...Sn; and the plurality of switching switches 4 are respectively recorded as J1, J2, J3...Jn;

[0021] The current detection unit 6, the voltage detection unit 5 and the multi-channel output control interface 8 are all electrically connected to the central processing control module 7. The central processing control module 7 controls the switching switch 4 through the multi-channel output control interface 8 according to the current and voltage information received from the current detection unit 6 and the voltage detection unit 5, and connects or exits the corresponding inductor 3 to the three-phase circuit;

[0022] The control method of the central processing control module is to obtain the phase difference through the waveform calculation of the voltage and current, thereby determining the parameters of the inductor that should be switched, and then control the output of the multi-channel output control interface to control the corresponding inductor to be connected to the three-phase circuit.

[0023] The control method of the central processing control module is, specifically, to obtain a phase difference by calculating the waveforms of the voltage and the current, and when the phase difference φ is less than zero, i.e. a negative value, i.e. the current is ahead of the voltage, the number of inductors put into use is increased through the output of the multi-channel output control interface until the phase difference φ is zero;

[0024] When the phase difference φ is greater than zero, that is, it is positive, that is, the current lags behind the voltage, then the number of inductors put into operation is reduced through the output of the multi-channel output control interface until the phase difference φ is zero or all inductors are withdrawn.

[0025] When the phase difference φ fluctuates between positive and negative, it means that the adjustment is too large or the network changes frequently. After it fluctuates N times, do not increase the inductor input and continue testing after a period of time T.

[0026] The intelligent controller 1 is provided with a microcomputer, which is used to monitor the automatic dynamics of the intelligent controller 1 and adjust internal parameters.

[0027] The present invention calculates the phase difference through the waveform of voltage and current. When the phase difference φ is less than zero, that is, a negative value, that is, the current is ahead of the voltage, the number of inductors invested is increased through the output of the multi-channel output control interface until the phase difference φ is zero; when the phase difference φ is greater than zero, that is, positive, that is, the current lags behind the voltage, the number of inductors invested is reduced through the output of the multi-channel output control interface until the phase difference φ is zero or all inductors are withdrawn; thereby balancing the current and changing the voltage quality at the end of the line. The power factor is improved, and it has the advantages of low investment, good effect, small size, simple installation, maintenance-free, stable performance, etc., effectively improving the stability and reliability of equipment operation, reducing equipment failures and accidents, and extending the service life of the equipment, which has a very significant effect on energy saving and reducing energy loss. In addition, the reactive current entering the resonance zone can be blocked outside the zone to avoid disturbing the resonance zone, which is also beneficial to the control of the parameters of the electric optimizer in the resonance zone and maintaining the stability of the resonance zone. Thereby effectively avoiding the increase of the current in the internal line of the resonance zone, the increase of heat loss, and the increase of the pressure difference, which finally leads to the reduction of the output of the motor, which is very unfavorable to energy saving.

[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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. An intelligent control device for optimizing electric energy, comprising an intelligent controller (1), a mutual inductor (2), a plurality of inductors (3) and a plurality of switching switches (4), Features: The mutual inductor (2) is arranged on an existing three-phase circuit L1 line. The intelligent controller (1) is provided with a voltage detection unit (5). The voltage detection unit (5) is electrically connected to the existing three-phase circuit L2 and L3 lines and is used to collect and detect the voltage on the three-phase circuit L2 and L3 lines. The intelligent controller (1) is provided with a current detection unit (6). The current detection unit (6) is electrically connected to the mutual inductor (2) and is used to collect and detect the current generated by the mutual inductor (2). The intelligent controller (1) is provided with a central processing control module (7). The intelligent controller (1) is also provided with a multi-channel An output control interface (8), each of the inductors (3) is electrically connected to a three-phase circuit L1 line, L2 line and L3 line via a switching switch (4); wherein the plurality of inductors (3) are respectively denoted as S1, S2, S3 ... Sn; and the plurality of switching switches (4) are respectively denoted as J1, J2, J3 ... Jn; wherein the inductors S1, S2, S3 ... Sn are electrically connected to the three-phase circuit L1 line, L2 line and L3 line via the switching switches J1, J2, J3 ... Jn, respectively, and the inductors S1, S2, S3 ... Sn correspond one to one to the switching switches J1, J2, J3 ... Jn; The current detection unit (6), the voltage detection unit (5) and the multi-channel output control interface (8) are all electrically connected to the central processing control module (7); the central processing control module (7) controls the switching switch (4) through the multi-channel output control interface (8) to perform switching control according to the current information collected by the current detection unit (6) and the voltage information collected by the voltage detection unit (5), thereby connecting or exiting the corresponding inductor (3) from the three-phase circuit; The control method of the central processing control module is to calculate the phase difference through the voltage waveform collected by the voltage detection unit and the current waveform collected by the current detection unit, so as to determine the parameters of the inductor that should be switched, and then control the corresponding inductor to be connected to the three-phase circuit through the output of the multi-channel output control interface.

2. The electric energy optimization intelligent control device according to claim 1, It is characterized in that The control method of the central processing control module is to calculate the phase difference through the waveform of the voltage collected by the voltage detection unit and the waveform of the current collected by the current detection unit. When the phase difference φ is less than zero, that is, a negative value, that is, the current leads the voltage, the number of inductors put into use is increased through the output of the multi-channel output control interface until the phase difference φ is zero; When the phase difference φ is greater than zero, that is, it is positive, that is, the current lags behind the voltage, then the number of inductors put into operation is reduced through the output of the multi-channel output control interface until the phase difference φ is zero or all inductors are withdrawn.

3. The electric energy optimization intelligent control device according to claim 2, It is characterized in that When the phase difference φ fluctuates between positive and negative, it means that the adjustment amount is too large or the network changes frequently. After it fluctuates N times, the inductor input is not increased and detection is continued after a period of time T.

4. An intelligent control device for optimizing electric energy according to any one of claims 1 to 3, It is characterized in that The installation position of the electric energy optimization intelligent control device is close to the electric equipment.

5. The electric energy optimization intelligent control device according to claim 1, It is characterized in that The intelligent controller (1) is provided with a microcomputer, which is used to monitor the automatic dynamics of the intelligent controller (1) and adjust internal parameters.

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