Voltage conversion circuit for hydroelectric power generation

Abstract

The utility model discloses a voltage conversion circuit for hydroelectric power generation, which relates to the technical field of hydroelectric power generation control, and comprises a hydroelectric power generation module used for hydroelectric power generation, three-phase rectification, filtering processing and electric energy superposition; the low-voltage detection module is used for low-voltage detection; the energy storage control module is used for storing energy and releasing stored electric energy when the low-voltage detection module is low in voltage and is not fully charged; the battery control module is used for detecting full power and controlling the power supply control module to transmit the electric energy released by the energy storage control module to the hydroelectric generation module after full power; and the voltage conversion module is used for carrying out voltage conversion processing and supplying power to electric equipment connected with the output module. The voltage conversion circuit for hydroelectric power generation can control the energy storage control module and the hydroelectric power generation module to carry out electric energy superposition power supply through the power supply control module when the energy storage control module is fully charged and the hydroelectric power generation module is in a low voltage state, thereby improving the voltage conversion period and improving the electric energy utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy power generation control, in particular to a voltage conversion circuit for water conservancy power generation. Background Art

[0002] Hydroelectric power generation is the process of converting the impact energy of water flow into electrical energy. When hydroelectric power generation begins, the supply voltage gradually increases from a low level, and after power generation ends, the supply voltage gradually decreases. To provide a stable output voltage, conventional hydroelectric generators employ voltage conversion circuits comprised of voltage-stabilizing ICs to stabilize the generated electrical energy. However, when the voltage generated by hydroelectric power generation is low, voltage stabilization cannot be performed properly, shortening the voltage stabilization period. Therefore, this method requires improvement. Utility Model Content

[0003] The embodiment of the present invention provides a voltage conversion circuit for hydropower generation to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A voltage conversion circuit for hydropower generation, comprising: a hydropower generation module, a low voltage detection module, an energy storage control module, a battery control module, a power supply control module, a voltage conversion module and an output module;

[0006] a hydroelectric power generation module connected to the power supply control module, configured to perform hydroelectric power generation, three-phase rectification and filtering, and output a first electric energy; and upon receiving a second electric energy transmitted by the power supply control module, superimpose the first electric energy and the second electric energy and output a third electric energy;

[0007] a low-voltage detection module, connected to the hydropower generation module, configured to sample the voltage of the first electric energy and output a first control signal when the sampled signal is lower than a set low-voltage threshold;

[0008] an energy storage control module, connected to the low-voltage detection module, the power supply control module, and the hydropower generation module, configured to receive and store the first electric energy, release the stored electric energy, and provide the second electric energy when the first control signal is received and the second control signal output by the power supply control module is not received;

[0009] a battery control module connected to the energy storage control module, configured to sample the voltage of the second electric energy and output a third control signal and set a discharge threshold when the sampled signal is greater than a set full-charge threshold, and continuously output the third control signal when the sampled signal is greater than the discharge threshold;

[0010] a power supply control module, connected to the battery control module and the low-voltage detection module, configured to control the hydropower generation module to perform filtering, and transmit the second electric energy to the hydropower generation module upon receiving the third control signal and the first control signal;

[0011] a voltage conversion module, connected to the hydropower generation module, configured to perform DC-DC conversion on the first electric energy or the third electric energy and output fourth electric energy;

[0012] The output module is connected to the voltage conversion module and is used to transmit the fourth electric energy to the connected electric device.

[0013] As a further solution of the present invention: the hydropower generation module includes a hydroelectric generator, a three-phase rectifier, a first capacitor and a first diode; the voltage conversion module includes a first converter and a third capacitor; the output module includes an output port;

[0014] Preferably, the first end, the second end and the third end of the hydroelectric generator are respectively connected to the first input end, the second input end and the third input end of the three-phase rectifier, the first output end of the three-phase rectifier is connected to the anode of the first diode, one end of the first diode is connected to the first end of the first capacitor and the input end of the first converter, the output end of the first converter is connected to one end of the third capacitor and the first end of the output port, the second output end of the three-phase rectifier is connected to the ground end of the first converter, the other end of the third capacitor, the second end of the output port and the ground end, and the second end of the first capacitor is connected to the power supply control module.

[0015] As a further solution of the present invention: the low voltage detection module includes a first resistor, a second resistor, a first comparator and a first threshold device;

[0016] Preferably, one end of the first resistor is connected to the anode of the first diode, the other end of the first resistor is connected to the inverting end of the first comparator and connected to the second output end of the three-phase rectifier through the second resistor, the non-inverting end of the first comparator is connected to the first threshold device, and the output end of the first comparator is connected to the power supply control module and the energy storage control module.

[0017] As a further solution of the present invention: the energy storage control module includes a third power tube, a battery module, a second capacitor, a first logic chip and a first inverter;

[0018] Preferably, the drain of the third power tube is connected to the cathode of the first diode, the source of the third power tube is connected to the first end of the second capacitor and the first end of the battery module, the second end of the battery module is connected to the second end of the second capacitor and the ground, the gate of the third power tube is connected to the Y end of the first logic chip, the A end of the first logic chip is connected to the output end of the first comparator, the B end of the first logic chip is connected to the output end of the first inverter, and the input end of the first inverter is connected to the battery control module.

[0019] As a further solution of the present invention: the power supply control module includes a first power tube, a third resistor, a fourth resistor, a second power tube, a first switch tube and a second logic chip;

[0020] Preferably, the drain of the first power tube is connected to the source of the second power tube and the second end of the first capacitor, the source of the first power tube is connected to the emitter of the first switching tube and the second end of the battery module, the gate of the first power tube is connected to the collector of the first switching tube and is connected to the first end of the first capacitor through a third resistor, the drain of the second power tube is connected to the first end of the battery module, the gate of the second power tube is connected to the Y end of the second logic chip and is connected to the base of the first switching tube through a fourth resistor, the A end of the second logic chip is connected to the battery control module, and the B end of the second logic chip is connected to the output end of the first comparator.

[0021] As a further solution of the present invention: the battery control module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second switch tube, a second comparator, and a second power supply;

[0022] Preferably, the non-inverting end of the second comparator is connected to one end of the sixth resistor and is connected to the first end of the battery module through the fifth resistor, the inverting end of the second comparator is connected to the collector of the second switching tube and one end of the seventh resistor and is connected to the second power supply through the eighth resistor, the emitter of the second switching tube is connected to the other end of the seventh resistor, the other end of the sixth resistor and the ground through the ninth resistor, and the base of the second switching tube is connected to the output end of the second comparator, the A end of the first logic chip and the A end of the second logic chip.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the voltage conversion circuit of the hydropower generation of the present invention is processed by the hydropower generation module; when the generated electric energy is lower than the set low-voltage threshold, the energy storage control module will perform energy storage work; when the voltage of the electric energy stored in the energy storage control module exceeds the set full-charge threshold and the hydropower generation module is in a low-voltage state, the power supply control module will control the energy storage control module and the hydropower generation module to superimpose electric energy and supply power until the voltage of the energy storage control module is lower than the set discharge threshold, thereby improving the voltage conversion cycle and improving the electric energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The present invention provides a schematic block diagram of a voltage conversion circuit for hydropower generation.

[0026] Figure 2 The present invention provides a circuit diagram of a voltage conversion circuit for hydropower generation.

[0027] Figure 3 This is a connection circuit diagram of the battery control module provided by an example of the present utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In one embodiment, see Figure 1 , a voltage conversion circuit for hydropower generation, comprising: a hydropower generation module 1, a low voltage detection module 2, an energy storage control module 3, a battery control module 4, a power supply control module 5, a voltage conversion module 6 and an output module 7;

[0030] Specifically, the hydropower generation module 1 is connected to the power supply control module 5, and is used to perform hydropower generation, three-phase rectification and filtering processing and output first electric energy. When receiving the second electric energy transmitted by the power supply control module 5, the first electric energy and the second electric energy are superimposed and the third electric energy is output;

[0031] a low-voltage detection module 2 connected to the hydropower generation module 1, configured to sample the voltage of the first electric energy and output a first control signal when the sampled signal is lower than a set low-voltage threshold;

[0032] an energy storage control module 3 connected to the low-voltage detection module 2, the power supply control module 5, and the hydropower generation module 1, configured to receive and store the first electric energy, release the stored electric energy, and provide the second electric energy when the first control signal is received and the second control signal output by the power supply control module 5 is not received;

[0033] a battery control module 4 connected to the energy storage control module 3, configured to perform voltage sampling on the second electric energy and output a third control signal and set a discharge threshold when the sampled signal is greater than a set full-charge threshold, and continuously output the third control signal when the sampled signal is greater than the discharge threshold;

[0034] a power supply control module 5 connected to the battery control module 4 and the low voltage detection module 2, configured to control the hydropower generation module 1 to perform filtering, and transmit the second electric energy to the hydropower generation module 1 upon receiving the third control signal and the first control signal;

[0035] a voltage conversion module 6 connected to the hydropower generation module 1 and configured to perform DC-DC conversion on the first electric energy or the third electric energy and output fourth electric energy;

[0036] The output module 7 is connected to the voltage conversion module 6 and is used to transmit the fourth electric energy to the connected electric device.

[0037] In a specific embodiment, the above-mentioned hydropower generation module 1 can adopt a hydropower generation circuit composed of a hydroelectric generator, a three-phase rectifier T1, a capacitor, etc., which can perform hydropower generation, provide AC power and perform three-phase rectification and filtering on the AC power; the above-mentioned low-voltage detection module 2 can adopt a low-voltage detection circuit composed of a resistor, a comparator and a threshold device to perform voltage sampling, set a low-voltage threshold and compare the voltage of the sampled signal with the low-voltage threshold; the above-mentioned energy storage control module 3 can adopt an energy storage control circuit composed of a battery module, a logic chip, a field effect transistor, etc., which can perform energy storage work when the low-voltage detection module 2 detects low voltage and does not perform discharge work, release the stored electric energy and supply power to the power supply control module 5; the above-mentioned battery The control module 4 can adopt a battery control circuit composed of resistors, transistors, comparators, etc. to set the full charge threshold and the discharge threshold. When fully charged, it outputs a high-level signal and continues to output a high-level signal during the period when the sampled signal is greater than the discharge threshold; the above-mentioned power supply control module 5 can adopt a power supply control circuit composed of field-effect transistors, transistors and resistors to control the filtering work of the hydroelectric generator and control the power superposition work of the energy storage control module 3 and the hydroelectric power generation module 1; the above-mentioned voltage conversion module 6 can adopt a voltage conversion circuit composed of a voltage converter and a capacitor to perform DC-DC conversion and filtering; the above-mentioned output module 7 can adopt an output circuit composed of an output port to connect to the electrical equipment.

[0038] In another embodiment, see Figure 1 、 Figure 2 and Figure 3 The hydropower generation module 1 includes a hydroelectric generator, a three-phase rectifier T1, a first capacitor C1 and a first diode D1; the voltage conversion module 6 includes a first converter T2 and a third capacitor C3; the output module 7 includes an output port;

[0039] Specifically, the first end, the second end and the third end of the hydroelectric generator are respectively connected to the first input end, the second input end and the third input end of the three-phase rectifier T1, the first output end of the three-phase rectifier T1 is connected to the anode of the first diode D1, one end of the first diode D1 is connected to the first end of the first capacitor C1 and the input end of the first converter T2, the output end of the first converter T2 is connected to one end of the third capacitor C3 and the first end of the output port, the second output end of the three-phase rectifier T1 is connected to the ground end of the first converter T2, the other end of the third capacitor C3, the second end of the output port and the ground end, and the second end of the first capacitor C1 is connected to the power supply control module 5.

[0040] In a specific embodiment, the first converter T2 may be a DC-DC converter; the three-phase rectifier T1 is composed of six groups of diodes.

[0041] Furthermore, the low voltage detection module 2 includes a first resistor R1, a second resistor R2, a first comparator A1 and a first threshold device;

[0042] Specifically, one end of the first resistor R1 is connected to the anode of the first diode D1, the other end of the first resistor R1 is connected to the inverting end of the first comparator A1 and is connected to the second output end of the three-phase rectifier T1 through the second resistor R2, the non-inverting end of the first comparator A1 is connected to the first threshold device, and the output end of the first comparator A1 is connected to the power supply control module 5 and the energy storage control module 3.

[0043] In a specific embodiment, the first resistor R1 and the second resistor R2 perform voltage sampling; the first comparator A1 can be an LM358 comparator; the first threshold device can be composed of a reference source and a resistor to provide a low voltage threshold.

[0044] Furthermore, the energy storage control module 3 includes a third power tube Q3, a battery module, a second capacitor C2, a first logic chip J1 and a first inverter INV1;

[0045] Specifically, the drain of the third power tube Q3 is connected to the cathode of the first diode D1, the source of the third power tube Q3 is connected to the first end of the second capacitor C2 and the first end of the battery module, the second end of the battery module is connected to the second end of the second capacitor C2 and the ground, the gate of the third power tube Q3 is connected to the Y end of the first logic chip J1, the A end of the first logic chip J1 is connected to the output end of the first comparator A1, the B end of the first logic chip J1 is connected to the output end of the first inverter INV1, and the input end of the first inverter INV1 is connected to the battery control module 4.

[0046] In a specific embodiment, the third power transistor Q3 may be an N-channel field effect transistor; the first logic chip J1 may be an AND gate chip; and the first inverter INV1 may be a NOT gate chip.

[0047] Furthermore, the power supply control module 5 includes a first power tube Q1, a third resistor R3, a fourth resistor R4, a second power tube Q2, a first switch tube V1 and a second logic chip J2;

[0048] Specifically, the drain of the first power tube Q1 is connected to the source of the second power tube Q2 and the second end of the first capacitor C1, the source of the first power tube Q1 is connected to the emitter of the first switching tube V1 and the second end of the battery module, the gate of the first power tube Q1 is connected to the collector of the first switching tube V1 and is connected to the first end of the first capacitor C1 through the third resistor R3, the drain of the second power tube Q2 is connected to the first end of the battery module, the gate of the second power tube Q2 is connected to the Y end of the second logic chip J2 and is connected to the base of the first switching tube V1 through the fourth resistor R4, the A end of the second logic chip J2 is connected to the battery control module 4, and the B end of the second logic chip J2 is connected to the output end of the first comparator A1.

[0049] In a specific embodiment, the first power tube Q1 and the second power tube Q2 can be N-channel field effect tubes; the first switch tube V1 can be an NPN transistor; and the second logic chip J2 can be an AND gate chip.

[0050] Furthermore, the battery control module 4 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second switch tube V2, a second comparator A2 and a second power supply VCC2;

[0051] Specifically, the non-inverting terminal of the second comparator A2 is connected to one end of the sixth resistor R6 and is connected to the first end of the battery module through the fifth resistor R5. The inverting terminal of the second comparator A2 is connected to the collector of the second switching tube V2 and one end of the seventh resistor R7 and is connected to the second power supply VCC2 through the eighth resistor R8. The emitter of the second switching tube V2 is connected to the other end of the seventh resistor R7, the other end of the sixth resistor R6 and the ground through the ninth resistor R9. The base of the second switching tube V2 is connected to the output end of the second comparator A2, the A end of the first logic chip J1 and the A end of the second logic chip J2.

[0052] In a specific embodiment, the fifth resistor R5 and the sixth resistor R6 perform voltage sampling; the second power supply VCC2, the seventh resistor R7 and the eighth resistor R8 set the full-charge threshold; the second switch tube V2 can be an NPN-type transistor, which cooperates with the ninth resistor R9, the second power supply VCC2, the seventh resistor R7 and the eighth resistor R8 to set the discharge threshold; the second comparator A2 can be an LM358 comparator.

[0053] In a voltage conversion circuit for hydropower generation according to this embodiment, a hydroelectric generator generates hydropower, a three-phase rectifier T1 performs rectification processing and outputs first electric energy, a first resistor R1 and a second resistor R2 sample the first electric energy, and when the sampled signal is lower than a low-voltage threshold value set by a first threshold device, a first comparator A1 outputs a high level, and a fifth resistor R5 and a sixth resistor R6 sample the voltage of a battery module. When the sampled signal is lower than a full-charge threshold value set by a second power supply VCC2, an eighth resistor R8, and a seventh resistor R7, an output end of a first inverter INV1 outputs a high level, and a Y end of a first logic chip J1 controls a third power transistor Q3 to conduct, causing the battery module to perform energy storage. After the electric energy output by the three-phase rectifier T1 exceeds the low-voltage threshold value, the third power transistor Q3 is turned off, and the first converter T2 performs D conversion on the first electric energy. The C-DC conversion process is performed, and the third capacitor C3 performs filtering before transmitting the power to the connected electrical device through the output port. If the signal sampled by the fifth resistor R5 and the sixth resistor R6 exceeds the full-charge threshold, the second comparator A2 outputs a high level, controlling the second switch tube V2 to conduct. The ninth resistor R9, the seventh resistor R7, the eighth resistor R8, and the second power supply VCC2 provide a discharge threshold. When the signal sampled by the fifth resistor R5 and the sixth resistor R6 is greater than the discharge threshold, the second comparator A2 outputs a high level. At the same time, when the power provided by the three-phase rectifier T1 is lower than the low-voltage threshold, the third power tube Q3 is controlled to be turned off to stop energy storage. The second logic chip J2 controls the first switch tube V1 and the second power tube Q2 to conduct, so that the power released by the battery module is superimposed on the power output by the three-phase rectifier T1 to meet the power supply requirements of the first converter T2.

[0054] 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0055] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A voltage conversion circuit for hydropower generation, characterized in that: The voltage conversion circuit of the hydropower generation includes: a hydropower generation module, a low voltage detection module, an energy storage control module, a battery control module, a power supply control module, a voltage conversion module and an output module; The hydropower generation module is connected to the power supply control module and is used to perform hydropower generation, three-phase rectification and filtering, and output first electric energy. Upon receiving the second electric energy transmitted by the power supply control module, the first electric energy and the second electric energy are superimposed to output third electric energy. The low-voltage detection module is connected to the hydropower generation module and is used to sample the voltage of the first electric energy and output a first control signal when the sampled signal is lower than a set low-voltage threshold; The energy storage control module is connected to the low voltage detection module, the power supply control module and the hydropower generation module, and is configured to receive and store the first electric energy, release the stored electric energy and provide the second electric energy when receiving the first control signal and not receiving the second control signal output by the power supply control module; The battery control module is connected to the energy storage control module and is used to sample the voltage of the second electric energy and output a third control signal and set a discharge threshold when the sampled signal is greater than a set full-charge threshold, and continuously output the third control signal when the sampled signal is greater than the discharge threshold; The power supply control module is connected to the battery control module and the low voltage detection module, and is used to control the hydropower generation module to perform filtering, and transmit the second electric energy to the hydropower generation module when receiving the third control signal and the first control signal; The voltage conversion module is connected to the hydropower generation module and is used to perform DC-DC conversion on the first electric energy or the third electric energy and output fourth electric energy; The output module is connected to the voltage conversion module and is used to transmit the fourth electric energy to the connected electric device.

2. A voltage conversion circuit for hydropower generation according to claim 1, characterized in that: The hydropower generation module includes a hydroelectric generator, a three-phase rectifier, a first capacitor and a first diode; the voltage conversion module includes a first converter and a third capacitor; the output module includes an output port; The first end, second end and third end of the hydroelectric generator are respectively connected to the first input end, second input end and third input end of the three-phase rectifier, the first output end of the three-phase rectifier is connected to the anode of the first diode, one end of the first diode is connected to the first end of the first capacitor and the input end of the first converter, the output end of the first converter is connected to one end of the third capacitor and the first end of the output port, the second output end of the three-phase rectifier is connected to the ground end of the first converter, the other end of the third capacitor, the second end of the output port and the ground end, and the second end of the first capacitor is connected to the power supply control module.

3. The voltage conversion circuit for hydropower generation according to claim 2, characterized in that: The low voltage detection module includes a first resistor, a second resistor, a first comparator and a first threshold device; One end of the first resistor is connected to the anode of the first diode, the other end of the first resistor is connected to the inverting end of the first comparator and is connected to the second output end of the three-phase rectifier through the second resistor, the non-inverting end of the first comparator is connected to the first threshold device, and the output end of the first comparator is connected to the power supply control module and the energy storage control module.

4. The voltage conversion circuit for hydropower generation according to claim 3, characterized in that: The energy storage control module includes a third power tube, a battery module, a second capacitor, a first logic chip and a first inverter; The drain of the third power tube is connected to the cathode of the first diode, the source of the third power tube is connected to the first end of the second capacitor and the first end of the battery module, the second end of the battery module is connected to the second end of the second capacitor and the ground, the gate of the third power tube is connected to the Y end of the first logic chip, the A end of the first logic chip is connected to the output end of the first comparator, the B end of the first logic chip is connected to the output end of the first inverter, and the input end of the first inverter is connected to the battery control module.

5. The voltage conversion circuit for hydropower generation according to claim 4, characterized in that: The power supply control module includes a first power tube, a third resistor, a fourth resistor, a second power tube, a first switch tube and a second logic chip; The drain of the first power tube is connected to the source of the second power tube and the second end of the first capacitor, the source of the first power tube is connected to the emitter of the first switching tube and the second end of the battery module, the gate of the first power tube is connected to the collector of the first switching tube and is connected to the first end of the first capacitor through the third resistor, the drain of the second power tube is connected to the first end of the battery module, the gate of the second power tube is connected to the Y end of the second logic chip and is connected to the base of the first switching tube through the fourth resistor, the A end of the second logic chip is connected to the battery control module, and the B end of the second logic chip is connected to the output end of the first comparator.

6. The voltage conversion circuit for hydropower generation according to claim 5, characterized in that: The battery control module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second switch tube, a second comparator and a second power supply; The non-inverting end of the second comparator is connected to one end of the sixth resistor and is connected to the first end of the battery module through the fifth resistor. The inverting end of the second comparator is connected to the collector of the second switching tube and one end of the seventh resistor and is connected to the second power supply through the eighth resistor. The emitter of the second switching tube is connected to the other end of the seventh resistor, the other end of the sixth resistor and the ground through the ninth resistor. The base of the second switching tube is connected to the output end of the second comparator, the A end of the first logic chip and the A end of the second logic chip.

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