Energy monitoring control cabinet
By designing an energy monitoring control cabinet including a current transformer, a voltage transformer and a compensation capacitor, the problem of lack of automatic monitoring and compensation functions in the prior art is solved, and efficient power utilization and operating costs are achieved.
Patent Information
- Application Number
- CN202421464754.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The prior art lacks an energy monitoring and control cabinet that can monitor the voltage and current of the electrical equipment, and automatically switch the corresponding compensation capacitor according to the current of the electrical equipment, improve the efficiency of electricity utilization and reduce operating costs.
An energy monitoring control cabinet is designed, including a current transformer, a voltage transformer and a compensation capacitor. The current and voltage signals are obtained through the processor, and the relay is automatically switched and compensated capacitor.
Real-time monitoring of the voltage and current of the electrical equipment is realized, and compensation capacitors are automatically adjusted according to the current, which improves the efficiency of power utilization and reduces operating costs.
Smart Images
Figure CN222763602U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of power supply equipment, and in particular relates to an energy monitoring control cabinet. Background Art
[0002] In an electricity-consuming unit, there are usually one or more electrical equipment, such as two machine tools, where more than one electrical equipment is often used simultaneously or alternately; or one or more production lines are set up for production, and equipment managers need to monitor the voltage and current of the electrical equipment in order to observe whether the electrical equipment is working normally or calculate the power load.
[0003] In addition, electrical equipment is usually an inductive load, such as the AC motor used in machine tools, which has a power factor of 80%. If it is not compensated, the utilization rate of electric energy will be low. Therefore, for inductive loads, corresponding compensation capacitors need to be connected in parallel to improve their power factor, improve the utilization efficiency of electric energy, and reduce the operating costs of electricity users.
[0004] The defect of the prior art is that there is a lack of an energy monitoring control cabinet that can monitor the voltage and current of electrical equipment, and can also automatically switch the corresponding compensation capacitor according to the current of the electrical equipment, thereby improving the utilization efficiency of electric energy and reducing the operating costs of the power user. Utility Model Content
[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: how to provide an energy monitoring control cabinet that can detect the voltage and current of electrical equipment; and can also automatically switch the corresponding compensation capacitor according to the current of the electrical equipment, so as to improve the utilization efficiency of electric energy and reduce operating costs.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solution: an energy monitoring control cabinet is provided, comprising a cabinet (1), wherein a current transformer (2), a voltage transformer (3) and a compensation capacitor (4) are arranged in the cabinet (1), one end of the primary winding of the current transformer (2) is connected to one end of a power supply, the other end of the primary winding of the current transformer (2) is connected to an input end of an electric device, the output end of the electric device is connected to the other end of the power supply, the secondary winding of the current transformer (2) is connected to a current sampling circuit, one end of the primary winding of the voltage transformer (3) is connected to one end of the power supply, the other end of the primary winding of the voltage transformer (3) is connected to the output end of the power supply, and the current sampling circuit is connected to the secondary winding of the current transformer (2). the other end; the secondary winding of the voltage transformer (3) is connected to a voltage sampling circuit; the current sampling circuit and the voltage sampling circuit are connected to an analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is connected to a processor (5); the number of compensation capacitors (4) is the same as that of electrical equipment, one end of the compensation capacitor (4) is connected to one end of a power supply via a normally open switch of a corresponding relay, and the other end of the compensation capacitor (4) is connected to the other end of the power supply; the processor (5) is connected to a corresponding switching transistor, the processor (5) controls the on and off of the coil of the corresponding relay via the switching transistor, and the processor (5) obtains the current signal of the current transformer (2) and controls the on and off of the coil of the relay according to the current signal.
[0007] The processor (5) is connected to a display (6).
[0008] The processor (5) is connected to a wireless communication module.
[0009] A vertical partition (11) is arranged in the cabinet (1), and the vertical partition (11) divides the cabinet (1) into a high-voltage chamber (12) at the rear and a low-voltage chamber (13) at the front. Two horizontal partitions (14) are arranged in parallel in the high-voltage chamber (12), and the horizontal partition (14) divides the high-voltage chamber (12) into an upper current transformer chamber (15), a middle capacitor chamber (16), and a lower voltage transformer chamber (17). The current transformer (2) is arranged in the current transformer chamber (15), the voltage transformer (3) is arranged in the voltage transformer chamber (17), the compensation capacitor (4) is arranged in the capacitor chamber (16), and the current sampling circuit, the voltage sampling circuit, the analog-to-digital conversion circuit, and the processor (5) are arranged in the low-voltage chamber (13).
[0010] First cable through holes (151) are arranged on both sides of the current transformer chamber (15); a second cable through hole (141) is arranged on the transverse partition (14); and a third cable through hole (111) is arranged on the vertical partitions (11) of the current transformer chamber (15), the voltage transformer chamber (17), and the capacitor chamber (16).
[0011] The cabinet (1) is provided with windows (18) at the front and rear, and the front and rear windows (18) are provided with a front cabinet door (19) and a rear cabinet door (20) respectively.
[0012] Beneficial effects: The utility model provides an energy monitoring control cabinet, which can detect the voltage and current of electrical equipment; it can also automatically switch on and off corresponding compensation capacitors according to the current of the electrical equipment, thereby improving the utilization efficiency of electric energy and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural diagram of the utility model;
[0014] Figure 2 This is the main view of the cabinet;
[0015] Figure 3 for Figure 2 Left view of;
[0016] Figure 4 for Figure 3 A cross-sectional view of
[0017] Figure 5 for Figure 2 Rear view of
[0018] Figure 6 for Figure 3 AA section view;
[0019] Figure 7 is a circuit diagram of a current sampling circuit;
[0020] Figure 8 is a circuit diagram of a voltage sampling circuit;
[0021] Fig. 9 is a circuit diagram of an analog-to-digital conversion circuit;
[0022] Fig.10 The schematic diagram of the processor circuit. DETAILED DESCRIPTION
[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0024] When implementing: Figures 1 to 10As shown, an energy monitoring control cabinet comprises a cabinet (1), wherein a current transformer (2), a voltage transformer (3) and a compensation capacitor (4) are arranged in the cabinet (1), one end of the primary winding of the current transformer (2) is connected to one end of a power supply, the other end of the primary winding of the current transformer (2) is connected to an input end of an electric device, the output end of the electric device is connected to the other end of the power supply, the secondary winding of the current transformer (2) is connected to a current sampling circuit, one end of the primary winding of the voltage transformer (3) is connected to one end of the power supply, the other end of the primary winding of the voltage transformer (3) is connected to the other end of the power supply; the secondary winding of the voltage transformer (3) is connected to A voltage sampling circuit is provided; the current sampling circuit and the voltage sampling circuit are connected to an analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is connected to a processor (5); the number of compensation capacitors (4) is the same as that of electrical equipment, one end of the compensation capacitor (4) is connected to one end of a power supply via a normally open switch of a corresponding relay, and the other end of the compensation capacitor (4) is connected to the other end of the power supply; the processor (5) is provided with a corresponding control end, the control end is connected to a corresponding switching transistor, the processor (5) controls the power on and off of the coil of the corresponding relay via the switching transistor, and the processor (5) obtains the current signal of the current transformer (2) and controls the power on and off of the coil of the relay according to the current signal.
[0025] Wherein, the electrical equipment is an inductive load, such as an AC motor, with a power factor of 80%, and a corresponding compensation capacitor (4) needs to be connected in parallel to improve its power factor, improve the utilization efficiency of electric energy, and reduce the operating cost of the power user. The electrical equipment is one, two, or even more than one set, or a corresponding production line; the power and power factor of each set of equipment are basically the same.
[0026] like Figure 1 , Fig.10 As shown, the electrical equipment includes an electrical equipment A and an electrical equipment B connected in parallel, the compensation capacitor (4) includes a compensation capacitor A and a compensation capacitor B, there are two switching transistors, a switching transistor Q1 and a switching transistor Q2, the switching transistor Q1 controls the on and off of the coil of relay A, the switching transistor Q2 controls the on and off of the coil of relay B, the normally open switch of relay A controls the on and off of compensation capacitor A, and the normally open switch of relay B controls the on and off of compensation capacitor B.
[0027] The current transformer (2) is used to convert the large current of the electric device into a corresponding small current and output it from the secondary winding. The current sampling circuit converts the current signal of the secondary winding of the current transformer (2) into a DC voltage signal and outputs it to the analog-to-digital conversion circuit. The analog-to-digital conversion circuit converts the current signal into a corresponding digital signal and sends it to the processor (5). The voltage transformer (3) is used to convert the high voltage at both ends of the electric device into a corresponding low voltage. The voltage sampling circuit converts the voltage signal of the secondary winding of the voltage transformer (3) into a corresponding DC voltage signal and outputs it to the analog-to-digital conversion circuit. The analog-to-digital conversion circuit converts the DC voltage signal into a corresponding digital signal and sends it to the processor (5). Thus, the voltage and current of the electric device are detected, and further, the power of the electric device can be calculated.
[0028] The current transformer (2) adopts a 0.2S-class current transformer to accurately measure the current of the electrical equipment; the voltage transformer (3) adopts a 0.2-class voltage transformer to accurately measure the voltage of the electrical equipment.
[0029] like Figure 7 , Fig. 9 As shown, the current transformer (2) is Figure 7 In the CT, the secondary winding output current of the current transformer (2) is converted into a corresponding AC voltage signal through the conversion resistor R0, the AC voltage signal is converted into a DC voltage signal through the bridge rectifier circuit, the DC voltage signal is filtered by the capacitor C11, the capacitor C12, and the capacitor C13, and then output to the analog-to-digital conversion circuit for analog-to-digital conversion. The voltage regulator D15 is used to prevent instantaneous high voltage from damaging the analog-to-digital conversion circuit.
[0030] like Figure 8 , Fig. 9 As shown, the voltage transformer (3) is Figure 8 The output voltage of the secondary winding of the voltage transformer (3) is converted by the resistor R X The AC voltage signal is converted into a corresponding AC voltage signal, which is converted into a DC voltage signal by a bridge rectifier circuit. The DC voltage signal is filtered by capacitors C21, C22, and C23 and then output to the analog-to-digital conversion circuit for analog-to-digital conversion. The voltage regulator D25 is used to prevent instantaneous high voltage from damaging the analog-to-digital conversion circuit.
[0031] For example, when one electrical device is started, its current is 20A, when two electrical devices are started, its current is 40A, and so on. After the processor (5) detects the corresponding current, it puts in the corresponding compensation capacitor (4) for compensation; when one electrical device is started, one set of compensation capacitors (4) is put in for compensation, when two electrical devices are started, two sets of compensation capacitors (4) are put in for compensation, and so on. When none of the electrical devices is started, its current is 0, and there is no need to put in the compensation capacitor (4).
[0032] One end of the compensation capacitor (4) is connected to one end of a power supply via a normally open switch of a corresponding relay, and the other end of the compensation capacitor (4) is connected to the other end of the power supply; the processor (5) is provided with a corresponding control end, and the corresponding high and low level signals are outputted through the corresponding control end, that is, the corresponding switch transistor can be controlled to be turned on and off, thereby controlling the coil of the corresponding relay to be powered on and off, controlling the normally open switch of the corresponding relay to be closed or opened, thereby controlling the corresponding compensation capacitor (4) to be connected or removed.
[0033] The processor (5) is connected to a display (6).
[0034] The processor (5) displays the voltage and current of the electrical equipment via the display (6).
[0035] The processor (5) is connected to a wireless communication module. The circuit diagram of the wireless communication module is omitted.
[0036] The processor (5) remotely transmits the voltage and current of the electrical equipment via the wireless communication module, thereby facilitating remote monitoring.
[0037] like Figure 2-Figure 6 As shown, a vertical partition (11) is arranged in the cabinet (1), and the vertical partition (11) divides the cabinet (1) into a high-voltage chamber (12) at the rear and a low-voltage chamber (13) at the front. Two horizontal partitions (14) are arranged in parallel in the high-voltage chamber (12), and the horizontal partition (14) divides the high-voltage chamber (12) into an upper current transformer chamber (15), a middle capacitor chamber (16) and a lower voltage transformer chamber (17); the current transformer (2) is arranged in the current transformer chamber (15), the voltage transformer (3) is arranged in the voltage transformer chamber (17), the compensation capacitor (4) is arranged in the capacitor chamber (16), and the current sampling circuit, the voltage sampling circuit, the analog-to-digital conversion circuit and the processor (5) are arranged in the low-voltage chamber (13).
[0038] The vertical partition (11) divides the cabinet (1) into a high-voltage chamber (12) at the rear and a low-voltage chamber (13) at the front, thereby isolating the high-voltage and low-voltage of the energy monitoring control cabinet, making operation safer for management personnel.
[0039] Two horizontal partitions (14) are arranged in parallel and spaced apart in the upper and lower parts of the high-voltage chamber (12); the horizontal partition (14) divides the high-voltage chamber (12) into an upper current transformer chamber (15), a middle capacitor chamber (16) and a lower voltage transformer chamber (17); the current transformer (2), the compensation capacitor (4) and the voltage transformer (3) are conveniently installed respectively; the power supply wire is introduced from the upper part of the energy monitoring control cabinet, the primary winding wire of the current transformer (2) is the thickest, the wire of the compensation capacitor (4) is the second thickest, and the primary winding wire of the voltage transformer (3) is the thinnest, and they are installed in sequence from top to bottom, which is convenient for saving copper used for the wires.
[0040] A small transformer is also provided in the voltage transformer room (17) to supply power to the processor (5).
[0041] like Figure 4-Figure 6 As shown, first cable holes (151) are provided on both sides of the current transformer chamber (15); a second cable hole (141) is provided on the transverse partition (14); and a third cable hole (111) is provided on the vertical partitions (11) of the current transformer chamber (15), the voltage transformer chamber (17), and the capacitor chamber (16).
[0042] The first cable through hole (151) facilitates the introduction and extraction of the power supply wire; the power supply wire is introduced from the upper part of the energy monitoring control cabinet. The wires of the compensation capacitor (4) and the voltage transformer (3) are connected to the wires of the power supply through the second cable through hole (141). The secondary winding wire of the current transformer (2) is introduced into the low-voltage chamber (13) through the third cable through hole (111) to connect to the current sampling circuit; the secondary winding wire of the voltage transformer (3) is introduced into the low-voltage chamber (13) through the third cable through hole (111) to connect to the voltage sampling circuit; the relay is arranged in the capacitor chamber (16), and the wire of the coil of the relay is introduced into the low-voltage chamber (13) through the third cable through hole (111) to connect to the corresponding switch transistor.
[0043] like Figure 2 and Figure 5 As shown, windows (18) are provided at the front and rear of the cabinet (1), and the front and rear windows (18) are provided with a front cabinet door (19) and a rear cabinet door (20) respectively.
[0044] The current sampling circuit, the voltage sampling circuit, the analog-to-digital conversion circuit, the processor (5), and the wireless communication module are fixedly arranged on the inner wall of the front cabinet door (19), the display (6) is arranged on the outer wall of the front cabinet door (19), and the antenna of the wireless communication module is led out of the front cabinet door (19). The front cabinet door (19) is opened to facilitate the inspection and repair of low-voltage equipment such as the current sampling circuit, the voltage sampling circuit, the analog-to-digital conversion circuit, and the processor (5).
[0045] The rear cabinet door (20) is opened to facilitate inspection and repair of the current transformer (2), the voltage transformer (3) and the compensation capacitor (4).
[0046] The front cabinet door (19) and the rear cabinet door (20) are both equipped with door locks, and the rear cabinet door (20) is also provided with a warning sign.
[0047] The above are only preferred implementations of the present invention. It should be pointed out that a number of modifications and improved technical solutions made by those skilled in the art without departing from the technical solution should also be deemed to fall within the scope of protection required by the claims.
Claims
1. An energy monitoring control cabinet, comprising a cabinet (1), characterized in that: A current transformer (2), a voltage transformer (3) and a compensation capacitor (4) are arranged in the cabinet (1); one end of the primary winding of the current transformer (2) is connected to one end of a power supply; the other end of the primary winding of the current transformer (2) is connected to an input end of an electrical device; the output end of the electrical device is connected to the other end of the power supply; the secondary winding of the current transformer (2) is connected to a current sampling circuit; one end of the primary winding of the voltage transformer (3) is connected to one end of the power supply; the other end of the primary winding of the voltage transformer (3) is connected to the other end of the power supply; the secondary winding of the voltage transformer (3) is connected to a voltage sampling circuit; The sampling circuit comprises a current sampling circuit and a voltage sampling circuit connected to an analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is connected to a processor (5); the number of the compensation capacitors (4) is the same as that of the electrical equipment, one end of the compensation capacitor (4) is connected to one end of a power supply via a normally open switch of a corresponding relay, and the other end of the compensation capacitor (4) is connected to the other end of the power supply; the processor (5) is connected to a corresponding switching transistor, and the processor (5) controls the on / off of the coil of the corresponding relay via the switching transistor. The processor (5) obtains the current signal of the current transformer (2) and controls the on / off of the coil of the relay according to the current signal.
2. An energy monitoring control cabinet according to claim 1, characterized in that: The processor (5) is connected to a display (6).
3. An energy monitoring control cabinet according to claim 1, characterized in that: The processor (5) is connected to a wireless communication module.
4. The energy monitoring control cabinet according to claim 1, characterized in that: A vertical partition (11) is arranged in the cabinet (1), and the vertical partition (11) divides the cabinet (1) into a high-voltage chamber (12) at the rear and a low-voltage chamber (13) at the front. Two horizontal partitions (14) are arranged in parallel in the high-voltage chamber (12), and the horizontal partition (14) divides the high-voltage chamber (12) into an upper current transformer chamber (15), a middle capacitor chamber (16), and a lower voltage transformer chamber (17). The current transformer (2) is arranged in the current transformer chamber (15), the voltage transformer (3) is arranged in the voltage transformer chamber (17), the compensation capacitor (4) is arranged in the capacitor chamber (16), and the current sampling circuit, the voltage sampling circuit, the analog-to-digital conversion circuit, and the processor (5) are arranged in the low-voltage chamber (13).
5. An energy monitoring control cabinet according to claim 4, characterized in that: First cable through holes (151) are arranged on both sides of the current transformer chamber (15); a second cable through hole (141) is arranged on the transverse partition (14); and a third cable through hole (111) is arranged on the vertical partitions (11) of the current transformer chamber (15), the voltage transformer chamber (17), and the capacitor chamber (16).
6. An energy monitoring control cabinet according to claim 4, characterized in that: The cabinet (1) is provided with windows (18) at the front and rear, and the front and rear windows (18) are provided with a front cabinet door (19) and a rear cabinet door (20) respectively.