A power distribution network power taking and sensor integrated device

Abstract

The application discloses a power distribution network power taking and sensor integrated device, and relates to the electric signal field.The power distribution network power taking and sensor integrated device comprises a power taking and measuring integrated module, which is used for taking power while realizing power distribution network voltage measurement, and provides working power supply for electronic elements in power distribution equipment; compared with the prior art, the application has the beneficial effects that the application integrates the functions of measurement and power taking, avoids separately arranging two sets of devices, greatly reduces the product volume, meets the requirement of the State Grid on primary and secondary deep integration, and is an ideal power distribution network device; the principle of the capacitor type voltage transformer is adopted to realize primary and secondary isolation, so that the sensor has strong load carrying capacity and anti-interference capacity; the traditional capacitor type voltage transformer has the risk of ferromagnetic resonance, but the application omits intermediate compensation reactance by using the characteristics of the amorphous alloy material transformer, avoids the ferromagnetic resonance hidden danger from the technical principle, and improves the reliability of equipment operation.

Description

Technical Field

[0001] This invention relates to the field of electrical signals, specifically to an integrated device for power supply and sensor in a power distribution network. Background Technology

[0002] In the field of power distribution networks, voltage sensors are used to measure voltage in circuits, providing crucial data for power system monitoring and protection. Power extraction devices provide operating power to electronic components in power distribution equipment. With the development of intelligent power distribution networks, the requirements for equipment integration and miniaturization are becoming increasingly stringent.

[0003] In practical applications, if measurement and power extraction functions are to be realized simultaneously, the measurement device (voltage sensor) and the power extraction device need to be installed separately. This not only increases the cost and size of the equipment, but also reduces the integration and reliability of the equipment. It cannot meet the State Grid's requirements for deep integration of primary and secondary distribution network equipment. There is an urgent need for a device that can deeply integrate measurement and power extraction functions. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated device for power distribution network access and sensors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An integrated power distribution network and sensor device, comprising:

[0007] The integrated power supply and measurement module is used to simultaneously measure the voltage of the power distribution network and supply power to the electronic components in the power distribution equipment.

[0008] The integrated power acquisition and measurement module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a transformer. One end of the first capacitor acquires the voltage from the power distribution network. The other end of the first capacitor is connected to one end of the second capacitor, one end of the first winding of the transformer, one end of the third winding of the transformer, and one end of the first resistor. The other end of the first resistor is connected to one end of the third capacitor. The other end of the third capacitor is grounded, and the other end of the second capacitor is also grounded. The other end of the third winding of the transformer provides operating power to the electronic components in the power distribution equipment. The second winding of the transformer outputs the sampled voltage from the power distribution network.

[0009] As a further aspect of the present invention, the transformer is made of amorphous alloy.

[0010] As a further embodiment of the present invention: the integrated power distribution network and sensor device further includes a fluctuation limiting measurement module, which includes:

[0011] The load current detection unit for power distribution equipment is used to detect the magnitude of the load current flowing through the power distribution equipment, convert it into a voltage signal, and output it as the first signal to the signal amplification and output unit.

[0012] The signal amplification and output unit amplifies the first input signal to obtain a second signal, which is then output to the dual-signal output unit.

[0013] The dual-signal output unit is used to divide the second signal and output it to the dual-signal comparison unit immediately and after a delay, respectively. The two signals output to the dual-signal comparison unit are the third signal and the fourth signal, respectively.

[0014] The dual-signal comparison unit is used to compare the voltage difference between the third and fourth signals. When the voltage difference is greater than the threshold, it drives the sampling unit to stop working; when the voltage difference is less than the threshold, it does not drive the sampling unit to stop working.

[0015] The stop sampling unit is used to disconnect the circuit of the transformer's second winding and the voltage magnitude indication device (specifically, a voltmeter) during operation.

[0016] The input terminal of the power distribution equipment load current detection unit is connected to the output terminal of the power measurement integrated module. The output terminal of the power distribution equipment load current detection unit is connected to the input terminal of the signal amplification output unit. The output terminal of the signal amplification output unit is connected to the input terminal of the dual signal output unit. The output terminal of the dual signal output unit is connected to the input terminal of the dual signal comparison unit. The output terminal of the dual signal comparison unit is connected to the input terminal of the stop sampling unit.

[0017] As a further embodiment of the present invention: the power distribution equipment load current detection unit includes a load and a Hall sensor. One end of the load is connected to a common point C (the output end of the power measurement integrated module), and the other end of the load is grounded through the Hall sensor. The output end of the Hall sensor is connected to the input end of the signal amplification output unit.

[0018] As a further embodiment of the present invention: the signal amplification output unit includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first amplifier. The non-inverting input of the first amplifier is connected to one end of the third resistor and one end of the fifth resistor. The other end of the third resistor is connected to the output terminal of the power distribution equipment load current detection unit. The other end of the fifth resistor is connected to the output terminal of the first amplifier and the input terminal of the dual signal output unit. The inverting input of the first amplifier is connected to one end of the second resistor and one end of the fourth resistor. The other end of the fourth resistor is grounded. The other end of the second resistor is connected to the output terminal of the power distribution equipment load current detection unit.

[0019] As a further embodiment of the present invention: the dual-signal output unit includes a first diode, a second diode, a first potentiometer, a second potentiometer, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a sixth capacitor. The anode of the first diode is connected to the anode of the second diode and the output terminal of the signal amplification output unit. The cathode of the first diode is connected to one end of the first potentiometer. The other end of the first potentiometer is connected to one end of the sixth resistor. The other end of the sixth resistor is connected to one end of the eighth resistor and a common point D (input terminal of the dual-signal comparison unit). The other end of the eighth resistor is grounded. The cathode of the second diode is connected to one end of the second potentiometer. The other end of the second potentiometer is connected to one end of the seventh resistor. The other end of the seventh resistor is connected to one end of the sixth capacitor, one end of the ninth resistor, and a common point E (input terminal of the dual-signal comparison unit). The other end of the sixth capacitor and the other end of the ninth resistor are grounded.

[0020] As a further embodiment of the present invention: the dual-signal comparison unit includes a second amplifier, a third amplifier, a tenth resistor, a third diode, a fourth diode, a sixth diode, and a seventh diode. The non-inverting input of the second amplifier is connected to the negative terminal of the sixth diode, and the positive terminal of the sixth diode is connected to a common point E. The non-inverting input of the third amplifier is connected to the negative terminal of the seventh diode, and the positive terminal of the seventh diode is connected to a common point D. The inverting input of the second amplifier is connected to the output terminal of the second amplifier and one end of the tenth resistor. The inverting input of the third amplifier is connected to the output terminal of the third amplifier, the negative terminal of the third diode, and the positive terminal of the fourth diode. The positive terminal of the third diode is connected to the negative terminal of the fourth diode and the other end of the tenth resistor.

[0021] As a further embodiment of the present invention: the stop sampling unit includes an eleventh resistor, a first transistor, a first relay, a fifth diode, a first switch, a second switch, and a voltmeter. The first transistor is a phototransistor, and the third and fourth diodes are light-emitting diodes. The base of the first transistor receives light emitted by the third or fourth diode. The collector of the first transistor is connected to the power supply voltage through the eleventh resistor. The emitter of the first transistor is connected to one end of the first relay and the negative terminal of the fifth diode. The other end of the first relay is grounded, and the positive terminal of the fifth diode is grounded. When the first relay is working, it controls the first and second switches to open. One end of the first switch is connected to a common point A, and the other end of the first switch is connected to one end of the voltmeter. One end of the second switch is connected to a common point B, and the other end of the second switch is connected to the other end of the voltmeter.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention integrates measurement and power extraction functions into one unit. Compared with the existing schemes that separately set up measurement and power extraction devices, it avoids the need for separate installation of two sets of devices, greatly reduces the product size, improves the degree of integration, meets the State Grid's requirements for deep integration of primary and secondary circuits, and is an ideal power distribution network device. By adopting the principle of a capacitive voltage transformer, primary and secondary isolation is achieved, giving the sensor (here, the transformer's tertiary winding serves as the measuring device) strong load-carrying capacity and anti-interference capability, enabling stable operation in complex power environments. Traditional capacitive voltage transformers have the risk of ferroresonance, while this invention utilizes the characteristics of amorphous alloy material (specifically, permalloy) transformers to omit intermediate compensation reactance, technically avoiding the risk of ferroresonance, improving the reliability of equipment operation, and reducing maintenance costs and the probability of failure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an integrated power distribution network and sensor device.

[0024] Figure 2 This is the circuit diagram for the integrated power supply and measurement module.

[0025] Figure 3 This is the equivalent circuit diagram of the power supply and measurement integrated module.

[0026] Figure 4 This is the circuit diagram for the fluctuation limiting measurement module. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 and Figure 2 An integrated power distribution network and sensor device, comprising:

[0029] The integrated power supply and measurement module 1 is used to simultaneously measure the voltage of the power distribution network and supply power to the electronic components in the power distribution equipment.

[0030] The power-taking and measurement integrated module 1 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, and a transformer T1. One end of the first capacitor C1 obtains the distribution network voltage, and the other end of the first capacitor C1 is connected to one end of the second capacitor C2 and one end of the first winding T1 of the transformer T1. The other end of the first winding T1 of the transformer T1 is connected to one end of the third winding T3 of the transformer T1 and one end of the first resistor R1. The other end of the first resistor R1 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is grounded. The other end of the second capacitor C2 is grounded. The other end of the third winding T3 of the transformer T1 provides a working power supply for the electronic components in the power distribution equipment. The second winding T2 of the transformer T1 outputs the sampled voltage of the distribution network.

[0031] In this embodiment: Please refer to Figure 2 , the transformer T1 is made of amorphous alloy material.

[0032] The voltage of the distribution network is divided by the first capacitor C1 (high-voltage capacitor) and the second capacitor C2. The transformer T1 is made of amorphous alloy material. The primary side winding is the first winding T1, and the second winding T2 in the secondary side winding is the measurement winding column (for voltage signal sampling), and the third winding T3 is the power-taking winding (for supplying power to the load X). The voltage compensation circuit is composed of the first resistor R1 and the third capacitor C3 connected in series, and is used to offset the voltage drop of the measurement winding. After the voltage of the distribution network is divided by the first capacitor C1 and the second capacitor C2, the voltage signal is mutually induced to the second winding T2 and the third winding Tl through the first winding T1 of the transformer T1. The voltage signal output by the second winding T2 is used for measurement, and the third winding T3 converts electromagnetic energy into electrical energy to achieve the power-taking function.

[0033] Please refer to Figure 3 , for the convenience of analysis and understanding, all the leakage inductances and leakage resistances of the first winding T1, the second winding T2, and the third winding T3 of the transformer T1 are converted to the primary side, and the equivalent circuit of the capacitive voltage sensor is obtained. The equivalent circuit includes a voltage source Us, a high-voltage equivalent capacitor C4 (corresponding to the first capacitor C1), a low-voltage equivalent capacitor C5 (corresponding to the second capacitor C2), a compensation inductor L, a resistor R, and a load resistor R'. L is the value of the compensation inductor plus the leakage inductance of the primary and secondary side windings of the transformer T1 converted to the primary side, and R is the value of the leakage resistance of the primary and secondary side windings of the transformer T1 converted to the primary side. The impedance of the rated load resistor R' is set to 1 MΩ, and R << R', so R is ignored in the calculation.

[0034] Then, from the circuit schematic diagram, it can be obtained that:

[0035] (1).

[0036] (2).

[0037] (3).

[0038] In the formula This represents the current flowing through the high-voltage equivalent capacitor C4. To compensate for the current flowing through the inductor L circuit. This represents the current flowing through the low-voltage equivalent capacitor C5. Us is the voltage obtained from the distribution network. C4 is the capacitive reactance of the high voltage equivalent capacitance. The low-voltage equivalent capacitance C5 is the capacitive reactance. To compensate for the inductive reactance of inductor L. J represents the load terminal voltage. In the phasor method of circuit analysis, J is the imaginary unit.

[0039] Substituting equation (1) into equation (2), we get:

[0040] (4).

[0041] Substituting equation (3) into equation (4) yields

[0042] (5).

[0043] During the design process, at a power supply frequency of 50Hz, the high and low voltage capacitors are connected in parallel, and their equivalent impedance to the leakage inductance of transformer T1 is equal to that of the transformer T1.

[0044] (6).

[0045] Substituting equation (6) into equation (5), we get:

[0046] (7).

[0047] Adjusting equation (7) yields:

[0048] (8).

[0049] It can be seen that at a power supply frequency of 50Hz, the load terminal voltage The voltage is determined by the voltage division ratio of the high-voltage equivalent capacitance C4 and the low-voltage equivalent capacitance C5. That is, in Figure 2 In this circuit, the output voltage of the third winding T3 of transformer T1 is determined by the first capacitor C1 and the second capacitor C2, so as to ensure that the output voltage meets the power demand of load X.

[0050] In another embodiment: for the material of transformer T1, in addition to amorphous alloys, other magnetic materials with high permeability and low loss can be explored. Similarly, the intermediate compensation reactance is omitted to realize the integrated measurement and power supply function, which may have advantages in some aspects of cost or performance.

[0051] In this embodiment: Please refer to Figure 1 and Figure 4 The integrated power distribution network and sensor device further includes a fluctuation limiting measurement module 2, which comprises:

[0052] The load current detection unit for power distribution equipment is used to detect the magnitude of the current flowing through the load X of the power distribution equipment, convert it into a voltage signal, and output it as the first signal to the signal amplification and output unit.

[0053] The signal amplification and output unit amplifies the first input signal to obtain a second signal, which is then output to the dual-signal output unit.

[0054] The dual-signal output unit is used to divide the second signal and output it to the dual-signal comparison unit immediately and after a delay, respectively. The two signals output to the dual-signal comparison unit are the third signal and the fourth signal, respectively.

[0055] The dual-signal comparison unit is used to compare the voltage difference between the third and fourth signals. When the voltage difference is greater than the threshold, it drives the sampling unit to stop working; when the voltage difference is less than the threshold, it does not drive the sampling unit to stop working.

[0056] The stop sampling unit is used to disconnect the circuit of the second winding T2 of transformer T1 and the voltage magnitude indication device (specifically, a voltmeter V) during operation.

[0057] The input terminal of the power distribution equipment load current detection unit is connected to the output terminal of the power measurement integrated module 1. The output terminal of the power distribution equipment load current detection unit is connected to the input terminal of the signal amplification output unit. The output terminal of the signal amplification output unit is connected to the input terminal of the dual signal output unit. The output terminal of the dual signal output unit is connected to the input terminal of the dual signal comparison unit. The output terminal of the dual signal comparison unit is connected to the input terminal of the stop sampling unit.

[0058] In this embodiment: Please refer to Figure 4 The load current detection unit of the power distribution equipment includes a load X and a Hall sensor H1. One end of the load X is connected to a common point C (the output terminal of the power measurement integrated module 1), and the other end of the load X is grounded through the Hall sensor H1. The output terminal of the Hall sensor H1 is connected to the input terminal of the signal amplification output unit.

[0059] Measuring distribution network voltage requires high precision, but fluctuations in the power-drawing load X can affect voltage stability. For example, when the power-drawing load X changes suddenly, the current change may couple to the first winding T1 through transformer T1, causing voltage fluctuations at the voltage divider point, thus affecting measurement accuracy. Since transformer T1 is based on the principle of a capacitive voltage transformer, it achieves primary and secondary isolation and has strong load-carrying capacity and anti-interference capability. Therefore, a fluctuation limiting measurement module 2 is designed to stop measuring the distribution network voltage when a large fluctuation in load X is detected.

[0060] When the load X fluctuates, the total current flowing through the load X changes. The magnitude of the total current is detected by the Hall sensor H1 and converted into a voltage signal, which is output as the first signal. When the load X fluctuates, the magnitude of the first signal changes.

[0061] In this embodiment: Please refer to Figure 4 The signal amplification output unit includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first amplifier U1. The non-inverting input of the first amplifier U1 is connected to one end of the third resistor R3 and one end of the fifth resistor R5. The other end of the third resistor R3 is connected to the output of the power distribution equipment load current detection unit. The other end of the fifth resistor R5 is connected to the output of the first amplifier U1 and the input of the dual signal output unit. The inverting input of the first amplifier U1 is connected to one end of the second resistor R2 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded. The other end of the second resistor R2 is connected to the output of the power distribution equipment load current detection unit.

[0062] The first signal is amplified by the first amplifier U1 to obtain the second signal, which is then output to the bidirectional output unit.

[0063] In this embodiment: Please refer to Figure 4 The dual-signal output unit includes a first diode D1, a second diode D2, a first potentiometer RP1, a second potentiometer RP2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a sixth capacitor C6. The positive terminal of the first diode D1 is connected to the positive terminal of the second diode D2 and the output terminal of the signal amplification output unit. The negative terminal of the first diode D1 is connected to one end of the first potentiometer RP1. The other end of the first potentiometer RP1 is connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to one end of the eighth resistor R8 and the common point D (the input terminal of the dual-signal comparison unit). The other end of the eighth resistor R8 is grounded. The negative terminal of the second diode D2 is connected to one end of the second potentiometer RP2. The other end of the second potentiometer RP2 is connected to one end of the seventh resistor R7. The other end of the seventh resistor R7 is connected to one end of the sixth capacitor C6, one end of the ninth resistor R9, and the common point E (the input terminal of the dual-signal comparison unit). The other end of the sixth capacitor C6 and the other end of the ninth resistor R9 are grounded.

[0064] The second signal passes through the first diode D1, the first potentiometer RP1, the sixth resistor R6 to the eighth resistor R8. The voltage across the eighth resistor R8 serves as the third signal and is immediately output to the dual-signal comparison unit. The second signal then passes through the second diode D2, the second potentiometer RP2, the seventh resistor R7, the sixth capacitor C6 to the ninth resistor R9. The voltage across the ninth resistor R9 serves as the fourth signal and is output to the dual-signal comparison unit. When the first diode D1, the first potentiometer RP1, the sixth resistor R6, and the eighth resistor R8 are all equal to the second diode D2, the second potentiometer RP2, the seventh resistor R7, and the ninth resistor R9, the fourth signal is the third signal before the delay due to the charging and discharging function of the sixth capacitor C6. For example, the currently output fourth signal is the third signal from 5 seconds ago. The specific delay time depends on the resistance values ​​of the second potentiometer RP2 and the seventh resistor R7.

[0065] In this embodiment: Please refer to Figure 4 The dual-signal comparison unit includes a second amplifier U2, a third amplifier U3, a tenth resistor R10, a third diode D3, a fourth diode D4, a sixth diode D6, and a seventh diode D7. The non-inverting input of the second amplifier U2 is connected to the negative terminal of the sixth diode D6, and the positive terminal of the sixth diode D6 is connected to the common point E. The non-inverting input of the third amplifier U3 is connected to the negative terminal of the seventh diode D7, and the positive terminal of the seventh diode D7 is connected to the common point D. The inverting input of the second amplifier U2 is connected to the output terminal of the second amplifier U2 and one end of the tenth resistor R10. The inverting input of the third amplifier U3 is connected to the output terminal of the third amplifier U3, the negative terminal of the third diode D3, and the positive terminal of the fourth diode D4. The positive terminal of the third diode D3 is connected to the negative terminal of the fourth diode D4 and the other end of the tenth resistor R10.

[0066] When the load X fluctuates, the current fluctuates, causing a difference between the third and fourth signals. When the load X fluctuates significantly, the difference is large enough to conduct the third diode D3 or the fourth diode D4 (i.e., the corresponding voltage difference is greater than the threshold). The second amplifier U2 and the third amplifier U3 are used as followers here, and the sixth diode D6 and the seventh diode D7 are set to provide isolation and prevent the common point D and E from forming a loop.

[0067] In this embodiment: Please refer to Figure 4The stop sampling unit includes an eleventh resistor R11, a first transistor V1, a first relay J1, a fifth diode D5, a first switch S1, a second switch S2, and a voltmeter V. The first transistor V1 is a phototransistor, and the third diode D3 and the fourth diode D4 are light-emitting diodes. The base of the first transistor V1 receives light emitted by the third diode D3 or the fourth diode D4. The collector of the first transistor V1 is connected to the power supply voltage through the eleventh resistor R11. The emitter of the first transistor V1 is connected to one end of the first relay J1 and the cathode of the fifth diode D5. The other end of the first relay J1 is grounded, and the anode of the fifth diode D5 is grounded. When the first relay J1 is working, it controls the first switch S1 and the second switch S2 to open. One end of the first switch S1 is connected to a common point A, and the other end of the first switch S1 is connected to one end of the voltmeter V. One end of the second switch S2 is connected to a common point B, and the other end of the second switch S2 is connected to the other end of the voltmeter V.

[0068] When the third diode D3 or the fourth diode D4 is turned on and emits light, the first transistor V1 is turned on, which energizes the first relay J1 and controls the first switch S1 and the second switch S2 to be turned off, thus preventing the voltmeter V from reading incorrectly and causing misleading information.

[0069] In another embodiment: the voltmeter can be other voltage magnitude indicating devices, such as AC millivoltmeters, digital multimeters, etc.

[0070] The working principle of this invention is as follows: The integrated power measurement module 1 is used to simultaneously measure the voltage of the power distribution network and obtain power to provide operating power for the electronic components in the power distribution equipment. The power distribution equipment load current detection unit is used to detect the magnitude of the current flowing through the load X of the power distribution equipment, convert it into a voltage signal, and output it as the first signal to the signal amplification output unit. The signal amplification output unit amplifies the input first signal to obtain a second signal, which is then output to the dual-signal output unit. The dual-signal output unit divides the second signal and outputs it immediately and after a delay to the dual-signal comparison unit, respectively. The two signals output to the dual-signal comparison unit are the third signal and the fourth signal, respectively. The dual-signal comparison unit compares the voltage difference between the third signal and the fourth signal. When the voltage difference is greater than a threshold, it drives the stop sampling unit to work; when the voltage difference is less than the threshold, it does not drive the stop sampling unit to work. The stop sampling unit disconnects the circuit between the second winding T2 of transformer T1 and the voltage magnitude indicator device during operation.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated device for power distribution network acquisition and sensors, characterized in that, The integrated power distribution network and sensor device includes: The integrated power supply and measurement module is used to simultaneously measure the voltage of the power distribution network and supply power to the electronic components in the power distribution equipment. The integrated power acquisition and measurement module includes a first capacitor, a second capacitor, a third capacitor, a first resistor, and a transformer. One end of the first capacitor acquires the voltage from the power distribution network. The other end of the first capacitor is connected to one end of the second capacitor, one end of the first winding of the transformer, one end of the third winding of the transformer, and one end of the first resistor. The other end of the first resistor is connected to one end of the third capacitor. The other end of the third capacitor is grounded, and the other end of the second capacitor is grounded. The other end of the third winding of the transformer provides operating power to the electronic components in the power distribution equipment. The second winding of the transformer outputs the sampling voltage from the power distribution network. The transformer is made of amorphous alloy. The integrated power distribution network and sensor device also includes a fluctuation limiting measurement module, which includes: The load current detection unit for power distribution equipment is used to detect the magnitude of the load current flowing through the power distribution equipment, convert it into a voltage signal, and output it as the first signal to the signal amplification and output unit. The signal amplification and output unit amplifies the first input signal to obtain a second signal, which is then output to the dual-signal output unit. The dual-signal output unit is used to divide the second signal and output it to the dual-signal comparison unit immediately and after a delay, respectively. The two signals output to the dual-signal comparison unit are the third signal and the fourth signal, respectively. The dual-signal comparison unit is used to compare the voltage difference between the third and fourth signals. When the voltage difference is greater than the threshold, it drives the sampling unit to stop working; when the voltage difference is less than the threshold, it does not drive the sampling unit to stop working. The stop sampling unit is used to disconnect the circuit of the transformer's second winding and the voltage magnitude indication device during operation; The input terminal of the power distribution equipment load current detection unit is connected to the output terminal of the power measurement integrated module. The output terminal of the power distribution equipment load current detection unit is connected to the input terminal of the signal amplification output unit. The output terminal of the signal amplification output unit is connected to the input terminal of the dual signal output unit. The output terminal of the dual signal output unit is connected to the input terminal of the dual signal comparison unit. The output terminal of the dual signal comparison unit is connected to the input terminal of the stop sampling unit.

2. The integrated power distribution network and sensor device according to claim 1, characterized in that, The load current detection unit for power distribution equipment includes a load and a Hall sensor. One end of the load is connected to a common point C, and the other end of the load is grounded through the Hall sensor. The output of the Hall sensor is connected to the input of the signal amplification output unit.

3. The integrated power distribution network and sensor device according to claim 1, characterized in that, The signal amplification output unit includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first amplifier. The non-inverting input of the first amplifier is connected to one end of the third resistor and one end of the fifth resistor. The other end of the third resistor is connected to the output terminal of the power distribution equipment load current detection unit. The other end of the fifth resistor is connected to the output terminal of the first amplifier and the input terminal of the dual signal output unit. The inverting input of the first amplifier is connected to one end of the second resistor and one end of the fourth resistor. The other end of the fourth resistor is grounded. The other end of the second resistor is connected to the output terminal of the power distribution equipment load current detection unit.

4. The integrated power distribution network and sensor device according to claim 1, characterized in that, The dual-signal output unit includes a first diode, a second diode, a first potentiometer, a second potentiometer, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a sixth capacitor. The anode of the first diode is connected to the anode of the second diode and the output terminal of the signal amplification output unit. The cathode of the first diode is connected to one end of the first potentiometer. The other end of the first potentiometer is connected to one end of the sixth resistor. The other end of the sixth resistor is connected to one end of the eighth resistor and a common point D. The other end of the eighth resistor is grounded. The cathode of the second diode is connected to one end of the second potentiometer. The other end of the second potentiometer is connected to one end of the seventh resistor. The other end of the seventh resistor is connected to one end of the sixth capacitor, one end of the ninth resistor, and a common point E. The other end of the sixth capacitor and the other end of the ninth resistor are grounded.

5. The integrated power distribution network and sensor device according to claim 1, characterized in that, The dual-signal comparison unit includes a second amplifier, a third amplifier, a tenth resistor, a third diode, a fourth diode, a sixth diode, and a seventh diode. The non-inverting input of the second amplifier is connected to the negative terminal of the sixth diode, and the positive terminal of the sixth diode is connected to the common point E. The non-inverting input of the third amplifier is connected to the negative terminal of the seventh diode, and the positive terminal of the seventh diode is connected to the common point D. The inverting input of the second amplifier is connected to the output terminal of the second amplifier and one end of the tenth resistor. The inverting input of the third amplifier is connected to the output terminal of the third amplifier, the negative terminal of the third diode, and the positive terminal of the fourth diode. The positive terminal of the third diode is connected to the negative terminal of the fourth diode and the other end of the tenth resistor.

6. The integrated power distribution network and sensor device according to claim 5, characterized in that, The stop sampling unit includes an eleventh resistor, a first transistor, a first relay, a fifth diode, a first switch, a second switch, and a voltmeter. The first transistor is a phototransistor, and the third and fourth diodes are light-emitting diodes. The base of the first transistor receives light emitted by the third or fourth diode. The collector of the first transistor is connected to the power supply voltage through the eleventh resistor. The emitter of the first transistor is connected to one end of the first relay and the cathode of the fifth diode. The other end of the first relay is grounded, and the anode of the fifth diode is grounded. When the first relay is working, it controls the first and second switches to open. One end of the first switch is connected to a common point A, and the other end of the first switch is connected to one end of the voltmeter. One end of the second switch is connected to a common point B, and the other end of the second switch is connected to the other end of the voltmeter.

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