New energy ship with photovoltaic power station reactive voltage control system

Abstract

The invention discloses a new energy ship with a photovoltaic power station reactive voltage control system, a power factor module is used for feeding back a current power factor signal in a power grid to a reactive compensation module, and a zero-crossing detection module is used for generating a current voltage and current zero-crossing signal and feeding back the current voltage and current zero-crossing signal to a reactive compensation cabinet. The reactive power compensation module generates an input or removal control signal based on the current power factor signal and feeds back the input or removal control signal to the reactive power compensation cabinet, and the reactive power compensation cabinet selects a corresponding voltage or current zero-crossing signal to compensate the power grid based on the input or removal control signal fed back by the reactive power compensation module.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy ships, and particularly relates to a new energy ship with a reactive voltage control system for a photovoltaic power station. Background Art

[0002] The power supply of new energy ships generally adopts hybrid power supply. The power generation side consists of a generator and photovoltaic power generation to form a power grid. However, since the actual capacity of the power grid will change due to the fixed power of the generator, the influence of weather changes, sea conditions, etc. on the photovoltaic power generation, capacity reservation is required to cope with it. Under reactive power compensation, the line loss of the power grid can be reduced, the reactive power state of the load can be compensated for electricity consumption, the actual electricity consumption of the power grid can be reduced, and the capacity can be increased indirectly. The existing reactive power compensation adopts the principle of local compensation. Most of the loads on ships are inductive loads. When compensating each time, the signal loop occupies too many resources, which will slow down the response, especially when there are too many compensation points. Summary of the Invention

[0003] Aiming at the above technical problems, the purpose of the present invention is to provide a new energy ship with a reactive voltage control system for a photovoltaic power station, which is characterized by including a power factor module, a reactive power compensation cabinet, a zero-crossing detection module, and a reactive power compensation module;

[0004] The power factor module is used to feedback the current power factor signal in the power grid to the reactive power compensation module. The zero-crossing detection module is used to generate the zero-crossing signals of the current voltage and current and feedback them to the reactive power compensation cabinet;

[0005] The reactive power compensation module generates an input or cut-off control signal based on the current power factor signal and feedbacks it to the reactive power compensation cabinet;

[0006] The reactive power compensation cabinet compensates the power grid based on the input or cut-off control signal feedback by the reactive power compensation module and selects the corresponding voltage or current zero-crossing signal;

[0007] The reactive power compensation module includes two reactive power control units and a reactive power pre-stage unit. The reactive power pre-stage unit is used to receive the current power factor signal, generate an input or cut-off start signal to the reactive power compensation cabinet, and a multiplexing signal to the reactive power control unit. The reactive power control unit resets according to the multiplexing signal or generates an input or cut-off external stop signal to the reactive power compensation cabinet.

[0008] Further, the reactive power pre-positioning unit includes a first resistor R1, a second resistor R2, a third resistor R3, a first MOS transistor Q1, a first connection terminal X1, a second connection terminal X2, a third connection terminal X3, a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a first diode D1, a second diode D2, a third diode D3, a first signal P1, and a second signal P2. One end of the first resistor R1 is connected to a power supply, and the other end of the first resistor R1 is connected to one end of the second resistor R2 and the source electrode of the first MOS transistor Q1. The gate electrode of the first MOS transistor Q1 is connected to one end of the third connection terminal X3, the output terminal of the second operational amplifier U2, and the cathode of the second diode D2. The anode of the second diode D2 is connected to the output terminal of the first operational amplifier U1 and the second signal P2. The inverting terminal of the first operational amplifier U1, the inverting terminal of the second operational amplifier U2, the non-inverting terminal of the third operational amplifier U3, and the first connection terminal X1 are connected. The drain electrode of the first MOS transistor Q1 is connected to one end of the third resistor R3 and the anode of the third diode D3. The cathode of the third diode D3 is connected to the second connection terminal X2 and the cathode of the first diode D1. The anode of the first diode D1 is connected to the output terminal of the third operational amplifier U3 and the first signal P1. The other end of the third resistor R3 is connected to a ground terminal.

[0009] Further, the reactive power control unit includes a fourth operational amplifier U4, a fifth operational amplifier U5, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second triode Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a sixth MOS transistor Q6, a seventh MOS transistor Q7, a fourth diode D4, a fifth diode D5, a sixth thyristor D6, a seventh thyristor D7, a fourth connection terminal X4, and a first relay K1. The non-inverting input terminal of the fourth operational amplifier U4 is connected to the signal integration module. The output terminal of the fourth operational amplifier U4 is connected to the base of the second triode Q2. The collector of the second triode Q2 is connected to the power supply. The emitter of the second triode Q2 is connected to the anode of the fourth diode D4 and the anode of the fifth diode D5. The cathode of the fifth diode D5 is connected to the base of the third triode Q3. The collector of the third triode Q3 is connected to the power supply. The emitter of the third triode Q3 is connected to the control electrode of the sixth thyristor D6. The anode of the sixth thyristor D6 is connected to the anode of the seventh thyristor D7 and the normally open contact of the first relay K1. The coil of the first relay K1 is connected to the fourth connection terminal X4. The fourth connection terminal X4 is connected to the output terminal of the fifth operational amplifier U5. The non-inverting input terminal of the fifth operational amplifier U5 is connected to one end of the twelfth resistor R12 and the collector of the fifth triode Q5. The emitter of the fifth triode Q5 is connected to the power supply. The base of the fifth triode Q5 is connected to the source of the sixth MOS transistor Q6 and the source of the seventh MOS transistor Q7. The gate of the seventh MOS transistor Q7 is connected to the cathode of the sixth thyristor D6 and one end of the eleventh resistor R11. The gate of the sixth MOS transistor Q6 is connected to the cathode of the seventh thyristor D7 and one end of the tenth resistor R10. The control electrode of the seventh thyristor D7 is connected to the collector of the fourth triode Q4. The base of the fourth triode Q4 is connected to one end of the ninth resistor R9 and the cathode of the fourth diode D4. The drains of the seventh MOS transistor Q7, the sixth MOS transistor Q6, the other end of the twelfth resistor R12, the other end of the eleventh resistor R11, the other end of the tenth resistor R10, and the other end of the ninth resistor R9 are connected to the ground terminal.

[0010] Further, the reactive power pre-stage unit further includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. One end of the fifth resistor R5 is connected to the inverting input terminal of the second operational amplifier U2, the inverting input terminal of the first operational amplifier U1, and the non-inverting input terminal of the third operational amplifier U3. One end of the eighth resistor R8 is connected to the power supply. The other end of the eighth resistor R8 is connected to the inverting input terminal of the third operational amplifier U3 and one end of the seventh resistor R7. The other end of the seventh resistor R7 is connected to one end of the sixth resistor R6 and the non-inverting input terminal of the second operational amplifier U2. The other end of the sixth resistor R6 is connected to one end of the fourth resistor R4 and the non-inverting input terminal of the first operational amplifier U1. The other end of the fourth resistor R4 is connected to the ground terminal.

[0011] Further, the reactive power control unit further includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and an eighteenth resistor R18. One end of the fourteenth resistor R14 is connected to the inverting terminal of the fourth operational amplifier U4 and one end of the thirteenth resistor R13. The other end of the fourteenth resistor R14 is connected to the power supply, and the other end of the thirteenth resistor R13 is connected to the ground terminal.

[0012] Further, one end of the fifteenth resistor R15 in the reactive power control unit is connected to the emitter of the fourth triode Q4 and one end of the sixteenth resistor R16. One end of the fifteenth resistor R15 is connected to the power supply, and the other end of the sixteenth resistor R16 is connected to the ground terminal.

[0013] Further, one end of the seventeenth resistor R17 in the reactive power control unit is connected to the inverting terminal of the fifth operational amplifier U5 and one end of the eighteenth resistor R18. One end of the seventeenth resistor R17 is connected to the power supply, and the other end of the eighteenth resistor R18 is connected to the ground terminal.

[0014] The beneficial effects of the present invention compared with the prior art are as follows:

[0015] Before the operation of the reactive power compensation cabinet, multiple required signals can complete the input or cut-off of capacitors within one loop, reducing the resources occupied by the number of signal loops. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the prior art and the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the reactive power compensation module provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the circuit of the reactive power pre-stage unit provided by the present invention.

[0020] Figure 4 It is a schematic diagram of the circuit of the reactive power control unit provided by the present invention DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives and advantages of the present invention more clear and understandable, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0022] Referring to the attached drawings, the present invention is a new energy ship with a reactive voltage control system for a photovoltaic power station, which is characterized by including a power factor module, a reactive power compensation cabinet, a zero-crossing detection module, and a reactive power compensation module;

[0023] The power factor module is used to feedback the current power factor signal in the power grid to the reactive power compensation module, and the zero-crossing detection module is used to generate the zero-crossing signals of the current voltage and current and feedback them to the reactive power compensation cabinet;

[0024] The reactive power compensation module generates an input or cut-off control signal based on the current power factor signal and feedbacks it to the reactive power compensation cabinet;

[0025] The reactive power compensation cabinet compensates the power grid based on the input or cut-off control signal feedback by the reactive power compensation module, selecting the corresponding voltage or current zero-crossing signal;

[0026] The reactive power compensation module includes two reactive power control units and a reactive power pre-stage unit. The reactive power pre-stage unit is used to receive the current power factor signal, generate a start signal for input or cut-off to the reactive power compensation cabinet, and a multiplexing signal to the reactive power control unit. The reactive power control unit resets according to the multiplexing signal or generates an external stop signal for input or cut-off to the reactive power compensation cabinet.

[0027] Specifically, the reactive power pre-stage unit includes a first resistor R1, a second resistor R2, a third resistor R3, a first MOS transistor Q1, a first connection terminal X1, a second connection terminal X2, a third connection terminal X3, a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a first diode D1, a second diode D2, a third diode D3, a first signal P1, and a second signal P2. One end of the first resistor R1 is connected to the power supply, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the source of the first MOS transistor Q1. The gate of the first MOS transistor Q1 is connected to one end of the third connection terminal X3, the output terminal of the second operational amplifier U2, and the cathode of the second diode D2. The anode of the second diode D2 is connected to the output terminal of the first operational amplifier U1 and the second signal P2. The inverting terminal of the first operational amplifier U1, the inverting terminal of the second operational amplifier U2, the non-inverting terminal of the third operational amplifier U3, and the first connection terminal X1 are connected. The drain of the first MOS transistor Q1 is connected to one end of the third resistor R3 and the anode of the third diode D3. The cathode of the third diode D3 is connected to the second connection terminal X2 and the cathode of the first diode D1. The anode of the first diode D1 is connected to the output terminal of the third operational amplifier U3 and the first signal P1. The other end of the third resistor R3 is connected to the ground terminal.

[0028] Specifically, the reactive power control unit includes a fourth operational amplifier U4, a fifth operational amplifier U5, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second triode Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a sixth MOS transistor Q6, a seventh MOS transistor Q7, a fourth diode D4, a fifth diode D5, a sixth thyristor D6, a seventh thyristor D7, a fourth connection terminal X4, and a first relay K1. The non-inverting input terminal of the fourth operational amplifier U4 is connected to the signal integration module. The output terminal of the fourth operational amplifier U4 is connected to the base of the second triode Q2. The collector of the second triode Q2 is connected to the power supply. The emitter of the second triode Q2 is connected to the anode of the fourth diode D4 and the anode of the fifth diode D5. The cathode of the fifth diode D5 is connected to the base of the third triode Q3. The collector of the third triode Q3 is connected to the power supply. The emitter of the third triode Q3 is connected to the control electrode of the sixth thyristor D6. The anode of the sixth thyristor D6 is connected to the anode of the seventh thyristor D7 and the normally open contact of the first relay K1. The coil of the first relay K1 is connected to the fourth connection terminal X4. The fourth connection terminal X4 is connected to the output terminal of the fifth operational amplifier U5. The non-inverting input terminal of the fifth operational amplifier U5 is connected to one end of the twelfth resistor R12 and the collector of the fifth triode Q5. The emitter of the fifth triode Q5 is connected to the power supply. The base of the fifth triode Q5 is connected to the source of the sixth MOS transistor Q6 and the source of the seventh MOS transistor Q7. The gate of the seventh MOS transistor Q7 is connected to the cathode of the sixth thyristor D6 and one end of the eleventh resistor R11. The gate of the sixth MOS transistor Q6 is connected to the cathode of the seventh thyristor D7 and one end of the tenth resistor R10. The control electrode of the seventh thyristor D7 is connected to the collector of the fourth triode Q4. The base of the fourth triode Q4 is connected to one end of the ninth resistor R9 and the cathode of the fourth diode D4. The drains of the seventh MOS transistor Q7, the sixth MOS transistor Q6, the other end of the twelfth resistor R12, the other end of the eleventh resistor R11, the other end of the tenth resistor R10, and the other end of the ninth resistor R9 are connected to the ground terminal.

[0029] Specifically, the reactive power pre-stage unit further includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. One end of the fifth resistor R5 is connected to the inverting input terminal of the second operational amplifier U2, the inverting input terminal of the first operational amplifier U1, and the non-inverting input terminal of the third operational amplifier U3. One end of the eighth resistor R8 is connected to the power supply. The other end of the eighth resistor R8 is connected to the inverting input terminal of the third operational amplifier U3 and one end of the seventh resistor R7. The other end of the seventh resistor R7 is connected to one end of the sixth resistor R6 and the non-inverting input terminal of the second operational amplifier U2. The other end of the sixth resistor R6 is connected to one end of the fourth resistor R4 and the non-inverting input terminal of the first operational amplifier U1. The other end of the fourth resistor R4 is connected to the ground terminal.

[0030] Specifically, the reactive power control unit further includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and an eighteenth resistor R18. One end of the fourteenth resistor R14 is connected to the inverting terminal of the fourth operational amplifier U4 and one end of the thirteenth resistor R13. The other end of the fourteenth resistor R14 is connected to the power supply, and the other end of the thirteenth resistor R13 is connected to the ground terminal.

[0031] Specifically, the reactive power control unit further includes one end of the fifteenth resistor R15 connected to the emitter of the fourth triode Q4 and one end of the sixteenth resistor R16. One end of the fifteenth resistor R15 is connected to the power supply, and the other end of the sixteenth resistor R16 is connected to the ground terminal.

[0032] Specifically, the reactive power control unit further includes one end of the seventeenth resistor R17 connected to the inverting terminal of the fifth operational amplifier U5 and one end of the eighteenth resistor R18. One end of the seventeenth resistor R17 is connected to the power supply, and the other end of the eighteenth resistor R18 is connected to the ground terminal.

[0033] Considering the principle of local compensation for the reactive power compensation cabinet, when the reactive power compensation cabinet corresponding to each network point performs reactive power injection and cut-off compensation operations on the power grid, it is necessary to have the preset signal for cutting off the capacitor of the corresponding reactive power compensation cabinet under high power factor, the preset signal for injecting the capacitor of the corresponding reactive power compensation cabinet under low power factor, and the actual control signal corresponding to the power factor signal under the preset signal. When each control signal is arranged in a way of sending and receiving, the resources occupied by the signal loop quantity are too much. Therefore, it is completed within one loop by multiplexing the signal in the same loop, reducing the resource occupation. Among them, the first connection terminal X1 is connected to the power factor module to obtain the current power factor signal of the power grid. The inverting terminal of the third operational amplifier U3 is set with the preset signal for cutting off the capacitor of the reactive power compensation cabinet under high power factor. The non-inverting terminal of the first operational amplifier U1 is set with the preset signal for injecting the capacitor of the reactive power compensation cabinet under low power factor (hereinafter referred to as the preset signal corresponding to the operational amplifier). The non-inverting terminal of the second operational amplifier U2 is set with the auxiliary control signal for high or low power factor. The first signal P1 is the control signal for cutting off the capacitor of the reactive power compensation cabinet. The second signal P2 is the control signal for injecting the capacitor of the reactive power compensation cabinet. The third operational amplifier U3 and the second operational amplifier U2 combine to output a signal to the second connection terminal X2. The first operational amplifier U1 and the second operational amplifier U2 combine to output a signal to the third connection terminal X3. The second connection terminal X2 and the third connection terminal X3 are respectively connected to a reactive power control unit. Each reactive power control unit outputs a stop signal and a reset signal according to the signal output of the second operational amplifier U2, the first operational amplifier U1 or the third operational amplifier U3. At this time, the change of the signal input will be classified into 3 control states. The first is that the signal of the first connection terminal X1 is within the preset signal range set by the third operational amplifier U3 and the first operational amplifier U1, indicating that there is no need to change the current switching state. The second is higher than the preset range set by the third operational amplifier U3, indicating that cutting is required, making the first connection terminal X1 lower than the preset signal set by the second operational amplifier U2. The third is lower than the preset signal range set by the first operational amplifier U1, indicating that injection is required, making the first connection terminal X1 higher than the preset signal set by the second operational amplifier U2. Assume that the first reactive power control unit is connected to the second connection terminal X2, and the second reactive power control unit is connected to the third connection terminal X3. When in the first state, the first operational amplifier U1 and the third operational amplifier U3 have no output. At this time, the second operational amplifier U2 will have two sub-state signals;The first seed state is that the second operational amplifier U2 has an output, the first MOS transistor Q1 is cut off, at this time the third connection terminal X3 outputs, the second connection terminal X2 has no output, and the state of the reactive power control unit corresponding to the second connection terminal X2 having no output is that the fourth operational amplifier U4 has no output, the second triode Q2 is cut off, the fourth triode Q4 and the seventh thyristor D7 are conducting, the sixth MOS transistor Q6 is cut off, and the fifth operational amplifier U5 outputs. The state of the reactive power control unit corresponding to the third connection terminal X3 is that the fourth operational amplifier U4 outputs, the second triode Q2, the fourth diode D4, and the fifth diode D5 are conducting, the fourth triode Q4 is cut off, the third triode Q3 and the sixth thyristor D6 are conducting, the seventh MOS transistor Q7 is cut off, and the fifth operational amplifier U5 outputs; conversely, if it is the second seed state, the second operational amplifier U2 has no output, the first MOS transistor Q1 is conducting, the third connection terminal X3 has no output, the second connection terminal X2 outputs, and the states of the reactive power control units corresponding to the second connection terminal X2 and the third connection terminal X3 are opposite to those of the first seed state. When there is no crossover between the two seed states, the fifth operational amplifier U5 outputs. The two seed states are determined during initial power-on; when there is no crossover between the two seed states, when the third operational amplifier U3 outputs, the first signal P1 outputs a cut-off signal, and the signal is fed back to the fourth operational amplifier U4 through the first diode D1 and the second connection terminal X2, and the state of the reactive power control unit remains unchanged. As the capacitor is cut off, the first connection terminal X1 first drops below the preset signal range of the third operational amplifier U3, and the signal of the first MOS transistor Q1 is fed back to the second connection terminal X2 through the third diode D3, and then after dropping below the preset signal range of the second operational amplifier U2, the second operational amplifier U2 outputs, and both the second connection terminal X2 and the fourth operational amplifier U4 have no output, the fourth triode Q4 and the seventh thyristor D7 are conducting, the sixth MOS transistor Q6 is cut off, and the fifth operational amplifier U5 has no output; when the first operational amplifier U1 outputs, the second signal P2 outputs an input signal, and the state of the reactive power control unit remains unchanged. As the capacitor is input, after the first connection terminal X1 is higher than the first operational amplifier U1, the second operational amplifier U2 outputs a signal to the third connection terminal X3, and then when the first connection terminal X1 is higher than the second operational amplifier U2 again, the third connection terminal X3 changes, and both the third connection terminal X3 and the fourth operational amplifier U4 have no output, the fourth triode Q4 and the seventh thyristor D7 are conducting, the sixth MOS transistor Q6 is cut off, and the fifth operational amplifier U5 has no output; the state signal of the fifth operational amplifier U5 is fed back to the fourth connection terminal X4, and the fourth connection terminal X4 is used for the unified control of the reset, input stop, and cut-off stop signals of the reactive power control unit;When the sub-states cross, the fifth operational amplifier U5 also has no output. At this time, when there is no signal and the coil of the first relay K1 is disconnected after passing through the fourth connection terminal X4, the normally closed contact of the first relay K1 is disconnected, and the other end of the normally closed contact of the first relay K1 is connected to the power supply (not shown in the attached drawing). The sixth thyristor D6 and the seventh thyristor D7 are cut off (the reactive power control unit is reset), and the state of entering the first sub-state and the second sub-state is judged again (the normal cross occurs after the outputs of the third operational amplifier U3 and the first operational amplifier U1 cross. When the third operational amplifier U3 and the first operational amplifier U1 have no output but the output of the second operational amplifier U2 changes, the reset still occurs). The second connection terminal X2 and the third connection terminal X3 are connected to the reactive power control unit, and the fourth connection terminals X4 of the two reactive power control units are in parallel. The input and cut-off corresponding stop signals are also in parallel with the fourth connection terminal X4. The internal and external signal control of the reactive power compensation cabinet is completed through the first signal P1, the second signal P2, and the fourth connection terminal X4. When the reactive power compensation module outputs a cut-off or input signal (the first signal P1 or the second signal P2), the reactive power compensation cabinet cuts off the capacitor by using the current zero-crossing signal fed back by the zero-crossing detection module for the first signal P1, and inputs the capacitor by using the voltage zero-crossing signal of the zero-crossing detection module for the second signal P2. The switching principles are all during the feedback of the first signal P1 or the second signal P2. When the fourth connection terminal X4 feeds back a signal, the switching operation is stopped and the current state is maintained.

[0034] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed claim.

Claims

1. A new energy ship with a reactive voltage control system for a photovoltaic power station, characterized in that It includes a power factor module, a reactive power compensation cabinet, a zero-crossing detection module, and a reactive power compensation module; The power factor module is used to feedback the current power factor signal in the power grid to the reactive power compensation module, and the zero-crossing detection module is used to generate the zero-crossing signals of the current voltage and current and feedback them to the reactive power compensation cabinet; The reactive power compensation module generates an input or cut-off control signal based on the current power factor signal and feedbacks it to the reactive power compensation cabinet; The reactive power compensation cabinet compensates the power grid based on the input or cut-off control signal feedback by the reactive power compensation module by selecting the corresponding zero-crossing signal of the voltage or current; The reactive power compensation module includes two reactive power control units and a reactive power pre-stage unit. The reactive power pre-stage unit is used to receive the current power factor signal, generate a start signal for input or cut-off to the reactive power compensation cabinet, and a multiplexing signal to the reactive power control unit. The reactive power control unit resets according to the multiplexing signal or generates an external stop signal for input or cut-off to the reactive power compensation cabinet.

2. The new energy ship with a reactive voltage control system for a photovoltaic power station according to claim 1, characterized in that The reactive power pre-stage unit includes a first resistor, a second resistor, a third resistor, a first MOS transistor, a first connection terminal, a second connection terminal, a third connection terminal, a first operational amplifier, a second operational amplifier, a third operational amplifier, a first diode, a second diode, a third diode, a first signal, and a second signal. One end of the first resistor is connected to the power supply, the other end of the first resistor is connected to one end of the second resistor and the source electrode of the first MOS transistor. The gate electrode of the first MOS transistor is connected to one end of the third connection terminal, the output terminal of the second operational amplifier, and the cathode of the second diode. The anode of the second diode is connected to the output terminal of the first operational amplifier and the second signal. The inverting terminal of the first operational amplifier is connected to the inverting terminal of the second operational amplifier, the non-inverting terminal of the third operational amplifier, and the first connection terminal. The drain electrode of the first MOS transistor is connected to one end of the third resistor and the anode of the third diode. The cathode of the third diode is connected to the second connection terminal and the cathode of the first diode. The anode of the first diode is connected to the output terminal of the third operational amplifier and the first signal. The other end of the third resistor is connected to the ground terminal.

3. The new energy ship with a reactive voltage control system for a photovoltaic power station according to claim 1, wherein The reactive power control unit includes a fourth operational amplifier, a fifth operational amplifier, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second triode, a third triode, a fourth triode, a fifth triode, a sixth MOS transistor, a seventh MOS transistor, a fourth diode, a fifth diode, a sixth thyristor, a seventh thyristor, a fourth connection terminal, and a first relay. The non-inverting input terminal of the fourth operational amplifier is connected to the signal integration module, the output terminal of the fourth operational amplifier is connected to the base of the second triode, the collector of the second triode is connected to the power supply, the emitter of the second triode is connected to the anode of the fourth diode and the anode of the fifth diode, the cathode of the fifth diode is connected to the base of the third triode, the collector of the third triode is connected to the power supply, the emitter of the third triode is connected to the control electrode of the sixth thyristor, the anode of the sixth thyristor is connected to the normally open contact of the first relay and the anode of the seventh thyristor, the coil of the first relay is connected to the fourth connection terminal, the fourth connection terminal is connected to the output terminal of the fifth operational amplifier, the non-inverting input terminal of the fifth operational amplifier is connected to one end of the twelfth resistor and the collector of the fifth triode, the emitter of the fifth triode is connected to the power supply, the base of the fifth triode is connected to the source of the sixth MOS transistor and the source of the seventh MOS transistor, the gate of the seventh MOS transistor is connected to the cathode of the sixth thyristor and one end of the eleventh resistor, the gate of the sixth MOS transistor is connected to the cathode of the seventh thyristor and one end of the tenth resistor, the control electrode of the seventh thyristor is connected to the collector of the fourth triode, the base of the fourth triode is connected to one end of the ninth resistor and the cathode of the fourth diode, and the drains of the seventh MOS transistor, the sixth MOS transistor, the other end of the twelfth resistor, the other end of the eleventh resistor, the other end of the tenth resistor, and the other end of the ninth resistor are connected to the ground terminal.

4. The new energy ship with a reactive voltage control system for a photovoltaic power station according to claim 2, characterized in that, The reactive power pre-stage unit further includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. One end of the fifth resistor is connected to the inverting input terminal of the second operational amplifier, the inverting input terminal of the first operational amplifier, and the non-inverting input terminal of the third operational amplifier. One end of the eighth resistor is connected to the power supply, the other end of the eighth resistor is connected to the inverting input terminal of the third operational amplifier and one end of the seventh resistor. The other end of the seventh resistor is connected to one end of the sixth resistor and the non-inverting input terminal of the second operational amplifier. The other end of the sixth resistor is connected to one end of the fourth resistor and the non-inverting input terminal of the first operational amplifier. The other end of the fourth resistor is connected to the ground terminal.

5. The new energy ship with a reactive voltage control system for a photovoltaic power station according to claim 3, characterized in that, The reactive power control unit further includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and an eighteenth resistor. One end of the fourteenth resistor is connected to the inverting input terminal of the fourth operational amplifier and one end of the thirteenth resistor. The other end of the fourteenth resistor is connected to the power supply. The other end of the thirteenth resistor is connected to the ground terminal.

6. The new energy ship with a reactive voltage control system for a photovoltaic power station according to claim 3, characterized in that, The reactive power control unit further includes that one end of the fifteenth resistor is connected to the emitter of the fourth triode and one end of the sixteenth resistor. One end of the fifteenth resistor is connected to the power supply. The other end of the sixteenth resistor is connected to the ground terminal.

7. The new energy ship with a reactive power voltage control system for a photovoltaic power station according to claim 3, characterized in that, The reactive power control unit further includes that one end of the seventeenth resistor is connected to the inverting input terminal of the fifth operational amplifier and one end of the eighteenth resistor. One end of the seventeenth resistor is connected to the power supply. The other end of the eighteenth resistor is connected to the ground terminal.

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