A voltage regulating system for hydroelectric power generation

Abstract

The utility model discloses a voltage regulation system of hydroelectric generation relates to hydroelectric generation technical field, including hydroelectric generation control module, for hydroelectric generation and three -phase controllable rectification, output module is used for with the electrical equipment connection, output sampling module is used for voltage sampling and when the signal of sampling is greater than the set charging threshold value, control battery control module carries out energy storage work, battery control module is used for energy storage and power supply, voltage regulation module, voltage sampling and when the signal of sampling is greater than first overvoltage threshold value, control hydroelectric generation control module step -down, overvoltage judging module is used for when the signal of voltage regulation module sampling is greater than second overvoltage threshold value, step -down regulation module carries out step -down processing to hydroelectric generation control module. The utility model discloses voltage regulation system of hydroelectric generation can gradually step -down processing to hydroelectric generation control module through voltage regulation module, when the electric energy voltage is higher, accelerates the step -down rate, improves power supply stability and security.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, specifically a voltage regulation system for hydropower generation. Background Technology

[0002] Hydropower generation equipment is a device that converts the kinetic energy generated by water flow into mechanical energy, and then into electrical energy. In order to provide a stable output voltage, existing hydropower generation equipment generally uses an electronic regulator composed of transistors, diodes, resistors, etc. When the output voltage of the hydropower generation equipment exceeds the set voltage range, the output electrical energy is reduced by disconnecting the magnetic field circuit inside the hydropower generation equipment. However, since the output voltage of the hydropower generation equipment decreases slowly after the magnetic field circuit is disconnected, the voltage drop rate is slow when the output voltage is far beyond the voltage range, so it needs to be improved. Utility Model Content

[0003] This utility model provides a voltage regulation system for hydropower generation to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A voltage regulation system for hydropower generation includes: a hydropower generation control module, a battery control module, an output module, an output sampling module, a voltage regulation module, an overvoltage judgment module, and a step-down regulation module;

[0006] The hydropower generation control module is connected to the battery control module and is used to generate hydropower and output AC power. When it receives the second power output from the battery control module, it performs three-phase rectification on the AC power and outputs the first power.

[0007] The output module is connected to the hydropower generation control module and is used to transmit the first electrical energy to the connected electrical equipment.

[0008] An output sampling module, connected to the output module, is used to sample the voltage of the first electrical energy input to the output module and output a first control signal when the sampled signal is greater than a set charging threshold.

[0009] A battery control module, connected to the output sampling module, is used to receive a first control signal and store the input first electrical energy, release the stored energy and provide a second electrical energy;

[0010] A voltage regulation module, connected to the voltage regulation module, is used to sample the voltage of the first electrical energy and output a first sampling signal, set a first overvoltage threshold, and control the hydropower generation control module to reduce the voltage of the generated AC power when the first sampling signal is greater than the first overvoltage threshold;

[0011] An overvoltage detection module, connected to the voltage regulation module, is used to set a second overvoltage threshold and a voltage threshold. When the first sampled signal is greater than the second overvoltage threshold, it outputs a second control signal and continues to output the second control signal while the first sampled signal is greater than the voltage threshold.

[0012] The voltage reduction regulation module, connected to the overvoltage judgment module, is used to receive the second control signal and reduce the voltage of the first electrical energy output by the hydropower generation control module.

[0013] As a further embodiment of this utility model: the hydropower generation control module includes a first inductor, a second inductor, a third inductor, a fourth inductor, a first thyristor, a second thyristor, a third thyristor, a fourth thyristor, a fifth switching transistor, a sixth thyristor, a sixth resistor, and a second diode;

[0014] Preferably, the first end of the first inductor is connected to the cathodes of the first, second, and third thyristors; the second end of the first inductor is connected to the voltage regulation module; the anode of the first thyristor is connected to the cathode of the fourth thyristor and, through the fourth inductor, to one end of the third inductor and one end of the second inductor; the anode of the third thyristor is connected to the other end of the second inductor and the cathode of the sixth thyristor; the anode of the second thyristor is connected to the other end of the third inductor and the cathode of the fifth thyristor; the anode of the fourth thyristor is connected to the anodes of the fifth and sixth thyristors and ground; the control terminal of the first thyristor is connected to the control terminals of the second, third, fourth, fifth, and sixth thyristors and, through the sixth resistor, to the cathode of the second diode; and the anode of the second diode is connected to the battery control module.

[0015] As a further embodiment of this utility model: the battery control module includes a first power transistor and a battery module; the output sampling module includes an eighth resistor, a ninth resistor, and a third diode; the output module includes an output port;

[0016] Preferably, the drain of the first power transistor is connected to the cathode of the third thyristor and one end of the output port, and is connected to the cathode of the third diode and one end of the ninth resistor through the eighth resistor. The anode of the third diode is connected to the gate of the first power transistor, the source of the first power transistor is connected to the anode of the second diode and one end of the battery pack, and the other end of the ninth resistor is connected to the other end of the output port, the other end of the battery pack, and ground.

[0017] As a further improvement of this utility model: the step-down regulation module includes a third switching transistor and a seventh resistor;

[0018] Preferably, the collector of the third switching transistor is connected to the control terminal of the sixth thyristor, the emitter of the third switching transistor is grounded through the seventh resistor, and the base of the third switching transistor is connected to the overvoltage detection module.

[0019] As a further embodiment of this utility model: the voltage regulation module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first power supply, a first comparator, a fifth resistor, a first diode, a first switching transistor, a second switching transistor, and a first push-button switch;

[0020] Preferably, the stationary end of the first push-button switch is connected to the first end of the first inductor, the second end of the first inductor is connected to the anode of the first diode, the collector of the second switching transistor, and the second end of the first inductor, the moving end of the first push-button switch is connected to the cathode of the first diode and the first end of the first resistor, and is connected to the collector of the first switching transistor and the base of the second switching transistor through a fifth resistor, the base of the first switching transistor is connected to the output terminal of the first comparator, the non-inverting end of the first comparator is connected to the second end of the first resistor and is grounded through a second resistor, the inverting end of the first comparator is connected to one end of a fourth resistor and is connected to the first power supply through a third resistor, and the other end of the fourth resistor is connected to the emitter of the first switching transistor, the emitter of the second switching transistor, and ground.

[0021] As a further embodiment of this utility model: the overvoltage judgment module includes a second power supply, an eleventh resistor, a twelfth resistor, a fourth switching transistor, and a second comparator;

[0022] Preferably, the non-inverting input of the second comparator is connected to the second terminal of the first resistor, the inverting input of the second comparator is connected to the collector of the fourth switch and one end of the eleventh resistor, and is connected to the second power supply through the tenth resistor, the emitter of the fourth switch is connected to the other end of the eleventh resistor and the ground terminal through the twelfth resistor, and the base of the fourth switch is connected to the output terminal of the second comparator and the base of the third switch.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: The voltage regulation system of this utility model for hydropower generation uses a hydropower generation control module to generate hydropower. When the generated electrical energy exceeds the charging threshold set by the battery control module, the battery control module stores the energy. When the generated electrical energy exceeds the first overvoltage threshold set by the voltage regulation module, the voltage regulation module gradually reduces the voltage of the hydropower generation control module until the generated electrical energy is lower than the overvoltage threshold, and then power generation resumes. When the generated electrical energy exceeds the second overvoltage threshold set by the overvoltage judgment module, the voltage reduction regulation module directly reduces the electrical energy output by the hydropower generation control module, and works in conjunction with the voltage regulation module to gradually reduce the voltage of the hydropower generation control module, thereby accelerating the voltage reduction rate and improving the stability and safety of power supply. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic block diagram of a voltage regulation system for hydropower generation, provided as an example of this utility model.

[0026] Figure 2 A circuit diagram of a voltage regulation system for hydropower generation provided as an example of this utility model.

[0027] Figure 3 The connection circuit diagram of the overvoltage detection module provided in this utility model embodiment. Detailed Implementation

[0028] 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.

[0029] In one embodiment, see Figure 1 A voltage regulation system for hydropower generation includes: a hydropower generation control module 1, a battery control module 2, an output module 3, an output sampling module 4, a voltage regulation module 5, an overvoltage judgment module 6, and a step-down regulation module 7.

[0030] Specifically, the hydropower generation control module 1 is connected to the battery control module 2 and is used to generate hydropower and output AC power. When it receives the second power output from the battery control module 2, it performs three-phase rectification on the AC power and outputs the first power.

[0031] Output module 3 is connected to the hydropower generation control module 1 and is used to transmit the first electrical energy to the connected electrical equipment;

[0032] Output sampling module 4, connected to output module 3, is used to sample the voltage of the first electrical energy input to output module 3 and output a first control signal when the sampled signal is greater than a set charging threshold.

[0033] Battery control module 2, connected to the output sampling module 4, is used to receive a first control signal and store the first input electrical energy, release the stored energy and provide a second electrical energy;

[0034] Voltage regulation module 5, connected to the voltage regulation module 5, is used to sample the voltage of the first electrical energy and output a first sampling signal, set a first overvoltage threshold, and control the hydropower generation control module 1 to reduce the voltage of the generated AC power when the first sampling signal is greater than the first overvoltage threshold;

[0035] The overvoltage judgment module 6 is connected to the voltage regulation module 5 and is used to set a second overvoltage threshold and a voltage threshold. When the first sampling signal is greater than the second overvoltage threshold, it outputs a second control signal and continues to output the second control signal while the first sampling signal is greater than the voltage threshold.

[0036] The voltage reduction adjustment module 7 is connected to the overvoltage judgment module 6 and is used to receive the second control signal and reduce the voltage of the first electrical energy output by the hydropower generation control module 1.

[0037] In a specific embodiment, the aforementioned hydropower generation control module 1 can be a hydropower generation control module composed of an excitation coil, generator stator winding, and thyristors, etc., which controls the rotation of the turbine by the water flow, controls the excitation coil, generator stator winding, etc. to generate AC power, and then performs three-phase controllable rectification by the thyristors; the aforementioned battery control module 2 can be a battery control circuit composed of field-effect transistors and battery modules, which performs energy storage and discharge operations; the aforementioned output module 3 can be an output circuit composed of output ports, which is connected to the electrical equipment; the aforementioned output sampling module 4 can be an output sampling circuit composed of resistors and diodes, which can perform voltage sampling and determine whether the sampled signal is greater than a set charging threshold, which is the charging voltage required by the battery control module 2; the aforementioned voltage regulation module 5 can be an electric... The voltage regulation circuit, composed of resistors, comparators, transistors, diodes, etc., can sample voltage and set a first overvoltage threshold. When the sampled signal is greater than the first overvoltage threshold, the excitation coil in the hydropower generation control module 1 is disconnected, causing the hydropower generation control module 1 to gradually reduce the voltage. The overvoltage judgment module 6 can use an overvoltage judgment circuit composed of resistors, comparators, transistors, etc., and can set a second overvoltage threshold. This second overvoltage threshold is greater than the first overvoltage threshold. When the signal sampled by the voltage regulation module 5 is greater than the second overvoltage threshold, a high-level signal is output and the voltage threshold is set. During the period when the sampled signal is greater than the voltage threshold, a high-level signal is continuously output. The step-down regulation module 7 can use a step-down regulation circuit composed of transistors and resistors to regulate the electrical energy output after rectification by the hydropower generation control module 1.

[0038] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3The hydropower generation control module 1 includes a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a first thyristor S1, a second thyristor S2, a third thyristor S3, a fourth thyristor S4, a fifth switch V5, a sixth thyristor V6, a sixth resistor R6, and a second diode D2.

[0039] Specifically, the first end of the first inductor L1 is connected to the cathodes of the first thyristor S1, the second thyristor S2, and the third thyristor S3. The second end of the first inductor L1 is connected to the voltage regulation module 5. The anode of the first thyristor S1 is connected to the cathode of the fourth thyristor S4 and is connected to one end of the third inductor L3 and one end of the second inductor L2 through the fourth inductor L4. The anode of the third thyristor S3 is connected to the other end of the second inductor L2 and the cathode of the sixth thyristor V6. The anode of the second thyristor S2 is connected to the other end of the third inductor L3 and the cathode of the fifth thyristor. The anode of the fourth thyristor S4 is connected to the anode of the fifth thyristor, the anode of the sixth thyristor V6, and ground. The control terminal of the first thyristor S1 is connected to the control terminals of the second thyristor S2, the third thyristor S3, the fourth thyristor S4, the fifth thyristor, and the sixth thyristor V6 and is connected to the cathode of the second diode D2 through the sixth resistor R6. The anode of the second diode D2 is connected to the battery control module 2.

[0040] In a specific embodiment, the first thyristor S1, the second thyristor S2, the third thyristor S3, the fourth thyristor S4, the fifth switch V5, and the sixth thyristor V6 can all be unidirectional thyristors for three-phase controllable rectification. The electrical energy transmitted by the sixth resistor R6 and the second diode D2 triggers and conducts the circuit. The first inductor L1 is the excitation coil, and the second inductor L2, the third inductor L3, and the fourth inductor L4 form the generator stator winding.

[0041] Furthermore, the battery control module 2 includes a first power transistor Q1 and a battery module; the output sampling module 4 includes an eighth resistor R8, a ninth resistor R9 and a third diode D3; the output module 3 includes an output port;

[0042] Specifically, the drain of the first power transistor Q1 is connected to the cathode of the third thyristor S3 and one end of the output port, and is connected to the cathode of the third diode D3 and one end of the ninth resistor R9 through the eighth resistor R8. The anode of the third diode D3 is connected to the gate of the first power transistor Q1. The source of the first power transistor Q1 is connected to the anode of the second diode D2 and one end of the battery pack. The other end of the ninth resistor R9 is connected to the other end of the output port, the other end of the battery pack, and the ground terminal.

[0043] In a specific embodiment, the first power transistor Q1 can be an N-channel MOSFET; the eighth resistor R8 and the ninth resistor R9 are used for voltage sampling, and the third diode D3 sets the charging threshold.

[0044] Furthermore, the buck regulator module 7 includes a third switch V3 and a seventh resistor R7;

[0045] Specifically, the collector of the third switch V3 is connected to the control terminal of the sixth thyristor V6, the emitter of the third switch V3 is grounded through the seventh resistor R7, and the base of the third switch V3 is connected to the overvoltage judgment module 6.

[0046] In a specific embodiment, the third switch V3 mentioned above can be an NPN transistor.

[0047] Furthermore, the voltage regulation module 5 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first power supply VCC1, a first comparator A1, a fifth resistor R5, a first diode D1, a first switching transistor V1, a second switching transistor V2, and a first push-button switch K1;

[0048] Specifically, the stationary end of the first push-button switch K1 is connected to the first terminal of the first inductor L1. The second terminal of the first inductor L1 is connected to the anode of the first diode D1, the collector of the second switching transistor V2, and the second terminal of the first inductor L1. The moving end of the first push-button switch K1 is connected to the cathode of the first diode D1 and the first terminal of the first resistor R1, and is connected to the collector of the first switching transistor V1 and the base of the second switching transistor V2 through the fifth resistor R5. The base of the first switching transistor V1 is connected to the output terminal of the first comparator A1. The non-inverting terminal of the first comparator A1 is connected to the second terminal of the first resistor R1 and is grounded through the second resistor R2. The inverting terminal of the first comparator A1 is connected to one terminal of the fourth resistor R4 and is connected to the first power supply VCC1 through the third resistor R3. The other terminal of the fourth resistor R4 is connected to the emitter of the first switching transistor V1, the emitter of the second switching transistor V2, and the ground terminal.

[0049] In a specific embodiment, the first resistor R1 and the second resistor R2 are used for voltage sampling; the first power supply VCC1, together with the third resistor R3 and the fourth resistor R4, sets the first overvoltage threshold; the first comparator A1 can be an LM358 comparator; the first switch V1 and the second switch V2 can both be NPN transistors.

[0050] Furthermore, the overvoltage judgment module 6 includes a second power supply VCC2, an eleventh resistor R11, a twelfth resistor R12, a fourth switch V4, and a second comparator A2;

[0051] Specifically, the non-inverting input of the second comparator A2 is connected to the second terminal of the first resistor R1, the inverting input of the second comparator A2 is connected to the collector of the fourth switch V4 and one end of the eleventh resistor R11, and is connected to the second power supply VCC2 through the tenth resistor, the emitter of the fourth switch V4 is connected to the other end of the eleventh resistor R11 and the ground terminal through the twelfth resistor R12, and the base of the fourth switch V4 is connected to the output terminal of the second comparator A2 and the base of the third switch V3.

[0052] In a specific embodiment, the second power supply VCC2, the tenth resistor, and the eleventh resistor R11 set the second overvoltage threshold; the fourth switch V4 can be an NPN transistor, which, together with the twelfth resistor R12, the second power supply VCC2, the tenth resistor, and the eleventh resistor R11, sets the voltage threshold; the second comparator A2 can be an LM358 comparator.

[0053] In this embodiment, a voltage regulation system for hydropower generation, a generator composed of a first inductor L1, a second inductor L2, a third inductor L3, and a fourth inductor L4 converts mechanical energy into electrical energy and outputs AC power when the water flow controls the turbine rotation. The power supplied by the battery module is transmitted through a second diode D2 and a sixth resistor R6, triggering the conduction of the first thyristor S1, the second thyristor S2, the third thyristor S3, the fourth thyristor S4, the fifth switch V5, and the sixth thyristor V6. This performs three-phase AC processing on the AC power, outputting the first electrical energy. An eighth resistor R8 and a ninth resistor R9 sample the voltage of the first electrical energy. When the sampled signal exceeds the charging threshold set by the third diode D3, the first power transistor Q1 conducts, and the battery module stores the energy. The received first electrical energy is then transmitted to the connected electrical equipment via the output port. After the first push-button switch K1 is pressed, the first resistor R1 and the second resistor R2 sample the first electrical energy. When the sampled signal exceeds the voltage of the first power supply VCC1 and the third resistor R9, the voltage of the first electrical energy is increased. When the first overvoltage threshold set by resistors 3 and 4 (R4 and R1) is reached, the first comparator A1 outputs a high level, controlling the first switch V1 to conduct, causing the second switch V2 to turn off, and the first inductor L1 to be de-energized, i.e., the generator's excitation coil is de-energized. The AC power output by the generator gradually decreases until it is below the first overvoltage threshold. When the signal sampled by the first resistor R1 and the second resistor R2 is greater than the second overvoltage threshold set by the second power supply VCC2, the tenth resistor, and the eleventh resistor R11, the AC power is in a step-down state. At the same time, the second comparator A2 controls the third switch V3 and the fourth switch V4 to conduct, reducing the conduction level of the first thyristor S1, the second thyristor S2, the third thyristor S3, the fourth thyristor S4, the fifth switch V5, and the sixth thyristor V6, further reducing the voltage of the first power output until it is below the voltage threshold set by the second power supply VCC2, the tenth resistor, the eleventh resistor R11, the twelfth resistor R12, and the fourth switch V4. At this point, the second comparator A2 stops controlling the third switch V3.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] 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. A voltage regulation system for hydroelectric power generation, characterized in that, The voltage regulation system for this hydropower generation includes: a hydropower generation control module, a battery control module, an output module, an output sampling module, a voltage regulation module, an overvoltage detection module, and a step-down regulation module. The hydropower generation control module is connected to the battery control module and is used to generate hydropower and output AC power. When it receives the second power output from the battery control module, it performs three-phase rectification on the AC power and outputs the first power. The output module is connected to the hydropower generation control module and is used to transmit the first electrical energy to the connected electrical equipment. The output sampling module is connected to the output module and is used to sample the voltage of the first electrical energy input to the output module and output a first control signal when the sampled signal is greater than a set charging threshold. The battery control module is connected to the output sampling module and is used to receive a first control signal and store the input first electrical energy, release the stored energy and provide a second electrical energy; The voltage regulation module, connected to the voltage regulation module, is used to sample the voltage of the first electrical energy and output a first sampling signal, set a first overvoltage threshold, and control the hydropower generation control module to reduce the voltage of the generated AC electrical energy when the first sampling signal is greater than the first overvoltage threshold. The overvoltage judgment module is connected to the voltage regulation module and is used to set a second overvoltage threshold and a voltage threshold. When the first sampling signal is greater than the second overvoltage threshold, it outputs a second control signal and continuously outputs the second control signal while the first sampling signal is greater than the voltage threshold. The voltage reduction regulation module is connected to the overvoltage judgment module and is used to receive the second control signal and reduce the voltage of the first electrical energy output by the hydropower generation control module.

2. The voltage regulation system for hydropower generation according to claim 1, characterized in that, The hydropower generation control module includes a first inductor, a second inductor, a third inductor, a fourth inductor, a first thyristor, a second thyristor, a third thyristor, a fourth thyristor, a fifth switching transistor, a sixth thyristor, a sixth resistor, and a second diode. The first end of the first inductor is connected to the cathodes of the first, second, and third thyristors. The second end of the first inductor is connected to the voltage regulation module. The anode of the first thyristor is connected to the cathode of the fourth thyristor and, through the fourth inductor, to one end of the third inductor and one end of the second inductor. The anode of the third thyristor is connected to the other end of the second inductor and the cathode of the sixth thyristor. The anode of the second thyristor is connected to the other end of the third inductor and the cathode of the fifth thyristor. The anode of the fourth thyristor is connected to the anodes of the fifth and sixth thyristors and ground. The control terminal of the first thyristor is connected to the control terminals of the second, third, fourth, fifth, and sixth thyristors and, through the sixth resistor, to the cathode of the second diode. The anode of the second diode is connected to the battery control module.

3. The voltage regulation system for hydropower generation according to claim 2, characterized in that, The battery control module includes a first power transistor and a battery module; the output sampling module includes an eighth resistor, a ninth resistor, and a third diode; the output module includes an output port; The drain of the first power transistor is connected to the cathode of the third thyristor and one end of the output port, and is connected to the cathode of the third diode and one end of the ninth resistor through the eighth resistor. The anode of the third diode is connected to the gate of the first power transistor. The source of the first power transistor is connected to the anode of the second diode and one end of the battery pack. The other end of the ninth resistor is connected to the other end of the output port, the other end of the battery pack, and the ground terminal.

4. The voltage regulation system for hydropower generation according to claim 3, characterized in that, The step-down regulation module includes a third switching transistor and a seventh resistor; The collector of the third switch is connected to the control terminal of the sixth thyristor, the emitter of the third switch is grounded through the seventh resistor, and the base of the third switch is connected to the overvoltage detection module.

5. A voltage regulation system for hydropower generation according to claim 4, characterized in that, The voltage regulation module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first power supply, a first comparator, a fifth resistor, a first diode, a first switching transistor, a second switching transistor, and a first push-button switch; The stationary end of the first push-button switch is connected to the first end of the first inductor. The second end of the first inductor is connected to the anode of the first diode, the collector of the second switching transistor, and the second end of the first inductor. The moving end of the first push-button switch is connected to the cathode of the first diode and the first end of the first resistor, and is connected to the collector of the first switching transistor and the base of the second switching transistor through a fifth resistor. The base of the first switching transistor is connected to the output of the first comparator. The non-inverting end of the first comparator is connected to the second end of the first resistor and is grounded through a second resistor. The inverting end of the first comparator is connected to one end of a fourth resistor and is connected to the first power supply through a third resistor. The other end of the fourth resistor is connected to the emitter of the first switching transistor, the emitter of the second switching transistor, and ground.

6. A voltage regulation system for hydropower generation according to claim 5, characterized in that, The overvoltage detection module includes a second power supply, an eleventh resistor, a twelfth resistor, a fourth switching transistor, and a second comparator. The non-inverting input of the second comparator is connected to the second end of the first resistor. The inverting input of the second comparator is connected to the collector of the fourth switch and one end of the eleventh resistor, and is connected to the second power supply through the tenth resistor. The emitter of the fourth switch is connected to the other end of the eleventh resistor and the ground through the twelfth resistor. The base of the fourth switch is connected to the output of the second comparator and the base of the third switch.

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