Load prediction device

Abstract

The utility model discloses a load forecasting device, which relates to the technical field of power station equipment, and comprises a step-down transformer, a primary coil of which is connected with a power supply to be measured; the input end of the rectifying and filtering module is connected with the secondary coil of the step-down transformer; the input end of the comparison module is connected with the output end of the rectifying and filtering module; the control module is respectively connected with the comparison module and the prompt module; the control module detects the voltage of the to-be-detected power supply through the comparison module, and when the voltage of the to-be-detected power supply is lower than a first preset threshold value, the control module controls the prompt module to send out a first prompt signal. When the voltage of the power system is lower than the first preset threshold value, the load is large, and the control module controls the prompt module to send out a first prompt signal so as to take countermeasures in advance.

Description

Technical Field

[0001] This utility model relates to the field of power plant equipment technology, and in particular to a load forecasting device. Background Technology

[0002] The power system plays an important role in people's daily lives and various production environments. Over the years, how to effectively plan the power system and how to rationally dispatch the power system load to ensure that people have access to safe and high-quality electricity has received increasing attention from the public.

[0003] Due to the randomness and diversity of power load, there are many factors that can affect the load and the process is complex. In addition, online load forecasting places higher demands on forecasting time, which leads to many difficulties in load forecasting and low forecasting accuracy.

[0004] Electricity load is a critical indicator of power system performance. Predicting electricity load values ​​can provide effective solutions for the optimization of the power system itself, making it easier to achieve high-quality management of the power system. Utility Model Content

[0005] The purpose of this utility model is to provide a load prediction device. When the voltage of the power system is lower than a first preset threshold, it indicates that the load is large. The control module controls the prompting module to issue a first prompt signal so as to take countermeasures in advance.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] One aspect of this utility model provides a load prediction device, comprising: a step-down transformer, the primary coil of which is connected to a power supply under test; a rectifier and filter module, the input of which is connected to the secondary coil of the step-down transformer; a comparison module, the input of which is connected to the output of the rectifier and filter module; a control module and a prompting module, the control module being connected to the comparison module and the prompting module respectively; the control module detects the voltage of the power supply under test through the comparison module, and when the voltage of the power supply under test is lower than a first preset threshold, the control module controls the prompting module to issue a first prompt signal.

[0008] In some embodiments, the comparison module includes a first comparator, a first resistor, a second resistor, a third resistor, and a fourth resistor. The non-inverting input of the first comparator is connected to one end of the first resistor. The other end of the first resistor is connected to one end of the third resistor and one end of the fourth resistor. The other end of the third resistor is connected to a power supply through the second resistor. The other end of the fourth resistor is grounded. The inverting input of the first comparator is connected to a first reference voltage.

[0009] In some embodiments, the comparison module further includes a second comparator and a fifth resistor, the non-inverting input of the second comparator is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the third resistor and one end of the fourth resistor, and the inverting input of the second comparator is connected to a second reference voltage.

[0010] In some embodiments, the comparison module further includes a reference voltage circuit, which includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a Zener diode, and a capacitor. One end of the sixth resistor is connected to a power supply, and the other end of the sixth resistor is connected to one end of the seventh resistor, the cathode of the Zener diode, and the anode of the capacitor. The other end of the seventh resistor is connected to one end of the eighth resistor and outputs a first reference voltage to the inverting input of the first comparator. The other end of the eighth resistor is connected to one end of the ninth resistor and outputs a second reference voltage to the inverting input of the second comparator. The other end of the ninth resistor, the anode of the Zener diode, and the cathode of the capacitor are grounded.

[0011] In some embodiments, the reference voltage circuit further includes a first NPN transistor, a second NPN transistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The first NPN transistor is disposed between the sixth resistor and the seventh resistor. The collector of the first NPN transistor is connected to the other end of the sixth resistor and one end of the tenth resistor. The other end of the tenth resistor is connected to the base of the first NPN transistor and the collector of the second NPN transistor. The emitter of the first NPN transistor is connected to one end of the eleventh resistor, one end of the seventh resistor, the cathode of the Zener diode, and the positive terminal of the capacitor. The other end of the eleventh resistor is connected to the base of the second NPN transistor. The emitter of the second NPN transistor is grounded through the twelfth resistor.

[0012] In some embodiments, the prompting module includes a third NPN transistor, a prompting light, and a thirteenth resistor. The collector of the third NPN transistor is connected to a power supply through the thirteenth resistor. The base of the third NPN transistor is connected to the first control output terminal of the control module. The emitter of the third NPN transistor is connected to the positive terminal of the prompting light, and the negative terminal of the prompting light is grounded.

[0013] In some embodiments, the prompting module further includes a fourth NPN transistor, a horn, and a fourteenth resistor. The collector of the fourth NPN transistor is connected to a power supply through the fourteenth resistor. The base of the fourth NPN transistor is connected to the second control output terminal of the control module. The emitter of the fourth NPN transistor is connected to the first electrode of the horn, and the second electrode of the horn is grounded.

[0014] In some embodiments, the prompting module further includes a diode, the positive terminal of which is connected to the second electrode of the speaker, and the negative terminal of which is connected to the first electrode of the speaker.

[0015] According to an embodiment of the present invention, a load prediction device has at least the following beneficial effects: when the voltage of the power system is lower than a first preset threshold, the voltage at the non-inverting input terminal of the first comparator is less than the voltage at the inverting input terminal, indicating that the load is large. The control module controls the prompting module to issue a first prompt signal, that is, the prompt light stays on. When the voltage of the power system is lower than a second preset threshold, the voltage at the non-inverting input terminal of the second comparator is less than the voltage at the inverting input terminal, indicating that the load is too large. The control module controls the prompting module to issue a second prompt signal, that is, the prompt light flashes and the horn sounds an alarm.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic block diagram of a load prediction device according to an embodiment;

[0019] Figure 2 The circuit schematic of the comparison module according to the embodiment;

[0020] Figure 3 This is a schematic diagram of a reference voltage circuit according to an embodiment;

[0021] Figure 4 This is a circuit schematic diagram of the prompting module according to an embodiment. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0026] The technical solutions of the embodiments of this application are briefly described below:

[0027] According to some embodiments, such as Figure 1 As shown, this application provides a load forecasting device, which includes:

[0028] A step-down transformer, the primary coil of which is connected to the power supply under test;

[0029] The input terminal of the rectifier and filter module is connected to the secondary coil of the step-down transformer.

[0030] The input of the comparison module is connected to the output of the rectifier and filter module.

[0031] The control module is connected to both the comparison module and the prompt module.

[0032] The control module detects the voltage of the power supply under test through the comparison module. When the voltage of the power supply under test is lower than the first preset threshold, the control module controls the prompting module to issue the first prompt signal.

[0033] The working principle of the above embodiment is as follows: the primary coil of the step-down transformer is connected to the power supply of the power system, the rectifier and filter module rectifies and filters the power output from the secondary coil of the step-down transformer, and then outputs it to the comparison module, the control module and the prompting module for power supply. The control module detects the voltage change of the power system through the comparison module.

[0034] When the voltage of the power system falls below the first preset threshold, it indicates a large load, and the control module controls the prompting module to issue a first prompt signal. When the voltage of the power system falls below the second preset threshold, it indicates an excessive load, and the control module controls the prompting module to issue a second prompt signal. Staff can then take appropriate measures based on these prompt signals.

[0035] The following is in conjunction with the appendix to this instruction manual. Figures 1 to 4 The preferred embodiments of this disclosure will be further described in detail below.

[0036] According to some embodiments, such as Figure 2 As shown, the comparison module includes a first comparator U1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, and its specific connection method is as follows.

[0037] The non-inverting input of the first comparator U1 is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the third resistor R3 is connected to the power supply through the second resistor R2. The other end of the fourth resistor R4 is grounded. The inverting input of the first comparator U1 is connected to the first reference voltage.

[0038] Furthermore, such as Figure 2 As shown, the comparison module also includes a second comparator U2 and a fifth resistor R5, and their specific connection method is as follows:

[0039] The non-inverting input of the second comparator U2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The inverting input of the second comparator U2 is connected to the second reference voltage.

[0040] The working principle of the above embodiment is as follows: when the voltage of the power system is lower than the first preset threshold, the voltage at the non-inverting input terminal of the first comparator U1 is less than the voltage at the inverting input terminal, indicating that the load is large, and the control module controls the prompting module to issue a first prompt signal; when the voltage of the power system is lower than the second preset threshold, the voltage at the non-inverting input terminal of the second comparator U2 is less than the voltage at the inverting input terminal, indicating that the load is too large, and the control module controls the prompting module to issue a second prompt signal.

[0041] According to some embodiments, such as Figure 3 As shown, the comparison module also includes a reference voltage circuit, which consists of a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a Zener diode DZ, and a capacitor C. The specific connection method is as follows:

[0042] One end of the sixth resistor R6 is connected to the power supply. The other end of the sixth resistor R6 is connected to one end of the seventh resistor R7, the cathode of the Zener diode DZ, and the positive terminal of the capacitor C. The other end of the seventh resistor R7 is connected to one end of the eighth resistor R8, and outputs the first reference voltage to the inverting input terminal of the first comparator U1. The other end of the eighth resistor R8 is connected to one end of the ninth resistor R9, and outputs the second reference voltage to the inverting input terminal of the second comparator U2. The other end of the ninth resistor R9, the anode of the Zener diode DZ, and the negative terminal of the capacitor C are grounded.

[0043] Among them, the Zener diode DZ is used to stabilize the reference voltage to prevent voltage fluctuations from affecting the reference voltage and thus affecting the detection results.

[0044] Furthermore, such as Figure 3 As shown, the reference voltage circuit also includes a first NPN transistor Q1, a second NPN transistor Q2, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12, and their specific connection method is as follows.

[0045] The first NPN transistor Q1 is positioned between the sixth resistor R6 and the seventh resistor R7. The collector of the first NPN transistor Q1 is connected to the other end of the sixth resistor R6 and one end of the tenth resistor R10. The other end of the tenth resistor R10 is connected to the base of the first NPN transistor Q1 and the collector of the second NPN transistor Q2. The emitter of the first NPN transistor Q1 is connected to one end of the eleventh resistor R11, one end of the seventh resistor R7, the cathode of the Zener diode DZ, and the positive terminal of the capacitor C. The other end of the eleventh resistor R11 is connected to the base of the second NPN transistor Q2. The emitter of the second NPN transistor Q2 is grounded through the twelfth resistor R12.

[0046] In this circuit, the first NPN transistor Q1 and the second NPN transistor Q2 form a voltage regulator circuit. When the output voltage of the first NPN transistor Q1 is high, the output of the second NPN transistor Q2 increases, causing the output of the first NPN transistor Q1 to decrease. When the output voltage of the first NPN transistor Q1 is low, the output of the second NPN transistor Q2 decreases, causing the output of the first NPN transistor Q1 to increase.

[0047] According to some embodiments, such as Figure 4 As shown, the indicator module includes a third NPN transistor Q3, an indicator LED, and a thirteenth resistor R13. Its specific connection method is as follows:

[0048] The collector of the third NPN transistor Q3 is connected to the power supply through the thirteenth resistor R13. The base of the third NPN transistor Q3 is connected to the first control output terminal of the control module. The emitter of the third NPN transistor Q3 is connected to the positive terminal of the indicator LED. The negative terminal of the indicator LED is grounded.

[0049] Furthermore, such as Figure 4 As shown, the prompt module also includes a fourth NPN transistor Q4, a speaker LS, and a fourteenth resistor R14, with the specific connection method as follows:

[0050] The collector of the fourth NPN transistor Q4 is connected to the power supply through the fourteenth resistor R14, the base of the fourth NPN transistor Q4 is connected to the second control output terminal of the control module, the emitter of the fourth NPN transistor Q4 is connected to the first electrode of the speaker LS, and the second electrode of the speaker LS is grounded.

[0051] Furthermore, such as Figure 4 As shown, the prompt module also includes a diode D, the positive terminal of which is connected to the second electrode of the speaker LS, and the negative terminal of which is connected to the first electrode of the speaker LS.

[0052] Diode D is used to freewheel the internal inductive components of the speaker LS when it is powered off.

[0053] The working principle of the above embodiment is as follows: when the voltage of the power system is lower than the first preset threshold, the voltage at the non-inverting input terminal of the first comparator U1 is less than the voltage at the inverting input terminal, indicating that the load is large. The control module controls the prompting module to issue a first prompt signal, that is, the prompting LED stays on. When the voltage of the power system is lower than the second preset threshold, the voltage at the non-inverting input terminal of the second comparator U2 is less than the voltage at the inverting input terminal, indicating that the load is too large. The control module controls the prompting module to issue a second prompt signal, that is, the prompting LED flashes and the horn LS sounds an alarm.

[0054] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A load forecasting device, characterized in that, The load forecasting device includes: A step-down transformer, wherein the primary coil of the step-down transformer is connected to the power supply under test; A rectifier and filter module, wherein the input terminal of the rectifier and filter module is connected to the secondary coil of the step-down transformer; A comparison module, wherein the input of the comparison module is connected to the output of the rectifier-filter module; A control module and a prompting module, wherein the control module is connected to the comparison module and the prompting module respectively; The control module detects the voltage of the power supply under test through the comparison module. When the voltage of the power supply under test is lower than a first preset threshold, the control module controls the prompting module to issue a first prompt signal.

2. The load forecasting device according to claim 1, characterized in that, The comparison module includes a first comparator, a first resistor, a second resistor, a third resistor, and a fourth resistor. The non-inverting input of the first comparator is connected to one end of the first resistor. The other end of the first resistor is connected to one end of the third resistor and one end of the fourth resistor. The other end of the third resistor is connected to a power supply through the second resistor. The other end of the fourth resistor is grounded. The inverting input of the first comparator is connected to a first reference voltage.

3. The load forecasting device according to claim 2, characterized in that, The comparison module further includes a second comparator and a fifth resistor. The non-inverting input of the second comparator is connected to one end of the fifth resistor, and the other end of the fifth resistor is connected to one end of the third resistor and one end of the fourth resistor. The inverting input of the second comparator is connected to a second reference voltage.

4. The load forecasting device according to claim 3, characterized in that, The comparison module further includes a reference voltage circuit, which includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a Zener diode, and a capacitor. One end of the sixth resistor is connected to a power supply, and the other end of the sixth resistor is connected to one end of the seventh resistor, the cathode of the Zener diode, and the anode of the capacitor. The other end of the seventh resistor is connected to one end of the eighth resistor and outputs a first reference voltage to the inverting input of the first comparator. The other end of the eighth resistor is connected to one end of the ninth resistor and outputs a second reference voltage to the inverting input of the second comparator. The other end of the ninth resistor, the anode of the Zener diode, and the cathode of the capacitor are grounded.

5. The load forecasting device according to claim 4, characterized in that, The reference voltage circuit further includes a first NPN transistor, a second NPN transistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The first NPN transistor is disposed between the sixth resistor and the seventh resistor. The collector of the first NPN transistor is connected to the other end of the sixth resistor and one end of the tenth resistor. The other end of the tenth resistor is connected to the base of the first NPN transistor and the collector of the second NPN transistor. The emitter of the first NPN transistor is connected to one end of the eleventh resistor, one end of the seventh resistor, the cathode of the Zener diode, and the positive terminal of the capacitor. The other end of the eleventh resistor is connected to the base of the second NPN transistor. The emitter of the second NPN transistor is grounded through the twelfth resistor.

6. The load forecasting device according to claim 1, characterized in that, The notification module includes a third NPN transistor, a notification light, and a thirteenth resistor. The collector of the third NPN transistor is connected to the power supply through the thirteenth resistor. The base of the third NPN transistor is connected to the first control output terminal of the control module. The emitter of the third NPN transistor is connected to the positive terminal of the notification light, and the negative terminal of the notification light is grounded.

7. The load forecasting device according to claim 6, characterized in that, The prompting module also includes a fourth NPN transistor, a speaker, and a fourteenth resistor. The collector of the fourth NPN transistor is connected to the power supply through the fourteenth resistor. The base of the fourth NPN transistor is connected to the second control output terminal of the control module. The emitter of the fourth NPN transistor is connected to the first electrode of the speaker. The second electrode of the speaker is grounded.

8. The load forecasting device according to claim 7, characterized in that, The prompting module also includes a diode, the positive terminal of which is connected to the second electrode of the speaker, and the negative terminal of which is connected to the first electrode of the speaker.

Images