Generator set transient power compensation system and generator set

Abstract

The invention discloses a generator set transient power compensation system and a generator set. The generator set comprises an internal combustion engine, a generator, an AC-DC rectification unit and a DC-AC inversion unit which are connected in sequence. The transient power compensation system comprises a power compensation unit and a compensation control unit, the power compensation unit is connected with the compensation control unit, and the power compensation unit and the compensation control unit are respectively connected with the direct current bus. The compensation control unit is used for collecting a voltage signal of a direct current bus or a voltage signal of an alternating current output end of the DC-AC inversion unit or a rotating speed signal of output voltage of a generator, and controlling the working state of the power compensation unit according to the collected voltage signal or rotating speed signal; and the power compensation unit is used for compensating power to the power supply input side of the direct-current bus under the control of the compensation control unit. Power can be supplemented in time at the moment when the generator set starts the load, and the transient load carrying capacity of the internal combustion engine generator set is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generator sets, and in particular to a generator set transient power compensation system and a generator set. Background Art

[0002] Internal combustion engine generator sets are widely used in many fields such as industrial production, commercial activities and daily life. In actual use, when starting inductive loads or mixed inductive and capacitive loads within the rated power range, these loads will generate a large peak power demand at the moment of starting. At this time, the internal combustion engine generator set will experience a decrease in speed and output voltage.

[0003] This drop in speed and output voltage will cause the load to fail to start due to low voltage. This not only affects the normal use of the load, but also reduces the applicable load range of the generator set, limits the application scenarios of the generator set, and reduces its applicability and practicality.

[0004] Therefore, there is an urgent need for a technical solution that can effectively solve the problem of speed and output voltage drop when an internal combustion engine generator set starts a specific load. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a generator set transient power compensation system and a generator set to improve and enhance the transient load-carrying capacity of the generator set, solve the speed and voltage drop problems caused by peak power demand when the internal combustion engine generator set starts the inductive or inductive and capacitive mixed load, avoid the load starting failure due to low voltage, and expand the load range applicable to the generator set.

[0006] A first object of the present invention is to provide a transient power compensation system for a generator set.

[0007] The above-mentioned application objective of the present invention is achieved through the following technical solutions:

[0008] A transient power compensation system for a generator set, the generator set comprising an internal combustion engine, a generator, an AC-DC rectifier unit and a DC-AC inverter unit, the internal combustion engine is drivingly connected to the generator, the power output end of the generator is connected to the AC input end of the AC-DC rectifier unit, the DC output end of the AC-DC rectifier unit is connected to the DC input end of the DC-AC inverter unit through a DC bus, and the AC output end of the DC-AC inverter unit is used to connect a load to supply power to the load;

[0009] The transient power compensation system includes a power compensation unit and a compensation control unit, wherein the power output end of the power compensation unit is connected to one end of the DC bus close to the AC-DC rectifier unit, the control end of the power compensation unit is connected to the signal output end of the compensation control unit, and the signal input end of the compensation control unit is connected to the AC output end of the DC bus or the DC-AC inverter unit or the power output end of the generator, wherein:

[0010] The compensation control unit is used to collect the voltage signal of the DC bus or the voltage signal of the AC output end of the DC-AC inverter unit or the speed signal of the output voltage of the power output end of the generator, and control the working state of the power compensation unit according to the collected voltage signal or speed signal;

[0011] The power compensation unit is used to compensate power to the power input side of the DC bus under the control of the compensation control unit.

[0012] Preferably, the power compensation unit comprises a battery module and a boost compensation circuit, wherein:

[0013] The battery module is used as a power source for the power compensation unit;

[0014] The power input end of the boost compensation circuit is connected to the output end of the battery module, the power output end of the boost compensation circuit is connected to the end of the DC bus close to the AC-DC rectifier unit as the power output end of the power compensation unit, the enable end of the boost compensation circuit is connected to the signal output end of the compensation control unit as the control end of the power compensation unit, and the boost compensation circuit is used to compensate the power output of the battery module to the power input side of the DC bus under the control of the boost module.

[0015] Preferably, the battery module adopts the starting battery provided by the generator set.

[0016] Preferably, the voltage boost compensation circuit adopts a Boost voltage boost circuit.

[0017] Preferably, the compensation control unit comprises a first voltage acquisition circuit and a first boost control module, wherein:

[0018] The signal acquisition end of the first voltage acquisition circuit is connected to the DC bus as the signal input end of the compensation control unit, the signal output end of the first voltage acquisition circuit is connected to the signal input end of the first boost control module, and the first voltage acquisition circuit is used to collect the voltage signal of the DC bus in real time;

[0019] The signal output end of the first boost control module is connected to the enable end of the boost compensation circuit as the signal output end of the compensation control unit, and the first boost control module is used to control the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit.

[0020] Preferably, when the first boost control module controls the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit, it is specifically used to:

[0021] The first boost control module compares the voltage signal collected by the first voltage collection circuit with a preset first voltage threshold.

[0022] When the voltage signal collected by the first voltage collection circuit is less than the first voltage threshold, the first boost control module outputs a high level, and the enable terminal of the boost compensation circuit is energized to turn on the boost compensation circuit and enter a working state, so as to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit to increase the voltage of the DC bus.

[0023] When the voltage signal collected by the first voltage collection circuit is greater than or equal to the first voltage threshold, the first boost control module outputs a low level, and the enable end of the boost compensation circuit is powered off to shut down the boost compensation circuit and exit the working state, so as to no longer consume the electrical energy of the battery module.

[0024] Preferably, when the first boost control module controls the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit, it is specifically used to:

[0025] The first boost control module compares the voltage signal collected by the first voltage collection circuit with a preset first voltage threshold.

[0026] When the voltage signal collected by the first voltage collection circuit is less than the first voltage threshold, the first boost control module outputs a high level, and the enable terminal of the boost compensation circuit is energized to turn on the boost compensation circuit and enter a working state, so as to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit to increase the voltage of the DC bus.

[0027] During the process of boosting the DC bus voltage, when the voltage signal collected by the first voltage collection circuit is greater than a preset second voltage threshold, the first boost control module outputs a low level, and the enable end of the boost compensation circuit is powered off to shut down the boost compensation circuit and exit the working state, so as to no longer consume the power of the battery module.

[0028] The first voltage threshold is smaller than the second voltage threshold.

[0029] Preferably, the boost module adopts an MCU microcontroller or a voltage comparator circuit.

[0030] Preferably, the generator set transient power compensation system further includes a filtering unit, and the filtering unit is connected in parallel with the first voltage acquisition circuit.

[0031] A second object of the present invention is to provide a generator set.

[0032] The second application objective of the present invention is achieved through the following technical solutions:

[0033] A generator set comprises the generator set transient power compensation system as described in the first aspect of the present invention.

[0034] The beneficial effects of the present invention are as follows:

[0035] 1. It can replenish power in time when the generator set starts the inductive load or the mixed inductive and capacitive load, effectively improve and enhance the transient load capacity of the internal combustion engine generator set, and ensure that the load can be started smoothly;

[0036] 2. Solve the problem of load start failure caused by voltage drop when the generator set is started, expand the applicable load range of the generator set, and improve the versatility and practicality of the generator set;

[0037] 3. By reasonably setting the voltage threshold, while meeting the power compensation demand, the frequent operation of the power compensation unit is avoided, the unnecessary consumption of energy of the power compensation unit is reduced, the energy utilization efficiency is improved, and the service life of the power compensation unit is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a principle block diagram of a transient power compensation system of a generator set in one embodiment of the present invention;

[0040] Figure 2 for Figure 1 The circuit schematic diagram of the transient power compensation system of the generator set in the embodiment shown;

[0041] Figure 3It is a principle block diagram of a transient power compensation system for a generator set in another embodiment of the present invention;

[0042] Figure 4 It is a principle block diagram of a transient power compensation system of a generator set in another embodiment of the present invention;

[0043] Figure 5 The figure is a functional block diagram of a generator set in one embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments 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 the field without creative work are within the scope of protection of the present invention.

[0045] In the embodiments provided by the present invention, it should be understood that the disclosed methods and systems can be implemented in other ways. The system embodiments described below are only schematic. For example, the division of units and modules is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or modules can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0046] In addition, all functional units in the embodiments of the present invention may be integrated into one processor, or each unit may be a separate device, or two or more units may be integrated into one device; each functional unit in the embodiments of the present invention may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0047] A person skilled in the art can understand that all or part of the steps of the following method embodiments can be completed by program instructions and related hardware. The aforementioned program instructions can be stored in a computer-readable storage medium. When the program instructions are executed, the steps of the following method embodiments are executed; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM), a magnetic disk or an optical disk, and other media that can store program codes.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0049] like Figure 1-4 As shown, an embodiment of the present invention provides a transient power compensation system for a generator set.

[0050] Specifically, the generator set includes an internal combustion engine 100, a generator 200, an AC-DC rectifier unit 300 and a DC-AC inverter unit 400. The internal combustion engine 100 is drivingly connected to the generator 200, the power output end of the generator 200 is connected to the AC input end of the AC-DC rectifier unit 300, the DC output end of the AC-DC rectifier unit 300 is connected to the DC input end of the DC-AC inverter unit 400 through a DC bus, and the AC output end of the DC-AC inverter unit 400 is used to connect a load to supply power to the load.

[0051] Specifically, the transient power compensation system includes a power compensation unit 1 and a compensation control unit 2, wherein the power output end of the power compensation unit 1 is connected to an end of the DC bus close to the AC-DC rectifier unit 300, the control end of the power compensation unit 1 is connected to the signal output end of the compensation control unit 2, and the signal input end of the compensation control unit 2 is connected to the DC bus, wherein:

[0052] The compensation control unit 2 is used to collect the voltage signal of the DC bus and control the working state of the power compensation unit 1 according to the collected voltage signal;

[0053] The power compensation unit 1 is used to compensate power to the power input side of the DC bus under the control of the compensation control unit 2.

[0054] The working principle of the transient power compensation system of the generator set in this embodiment is as follows:

[0055] When the generator set is working, the internal combustion engine 100 drives the generator 200 to rotate, and the generator 200 outputs three-phase AC power to the AC-DC rectifier unit 300. The AC-DC rectifier unit 300 converts the AC power into DC power and outputs it to the DC-AC inverter unit 400. The DC-AC inverter unit 400 converts the DC power into the AC power required by the load. During the operation of the generator set, the compensation control unit 2 collects the voltage signal of the DC bus and controls the working state of the power compensation unit 1 according to the collected voltage signal, that is, the compensation control unit 2 controls the switch state of the power compensation unit 1 according to the voltage signal of the DC bus. Under the control of the compensation control unit 2, the power compensation unit 1 compensates the power to the power input side of the DC bus, provides instantaneous power compensation, thereby increasing the peak power of the generator set, and then effectively improving and enhancing the transient load carrying capacity of the generator set, solving the problem of speed and voltage drop caused by peak power demand when the internal combustion engine 100 generator set starts the inductive or inductive and capacitive mixed load, avoiding the load starting failure due to too low voltage, and expanding the load range applicable to the generator set.

[0056] Specifically, when the generator set is in normal operation, the voltage u1 stably output by the DC bus is the preset stable voltage U1, and the voltage u2 output by the DC-AC inverter unit 400 to the load is the rated voltage U2 (wherein, U1>U2, U1 is set according to U2, U1=U2×1.414 / inversion efficiency, the rated voltage U2 is determined according to the rated output voltage of the generator 200, and U2 is not less than 80% of the rated output voltage of the generator 200). At this time, the compensation control unit 2 is used to collect the voltage signal of the DC bus. When the voltage of the DC bus is not less than the voltage U1 of the first voltage threshold, the power compensation unit 1 is not enabled, and the power compensation unit 1 is in a closed state;

[0057] When the load starting current of the generator set is greater than the rated current of the generator 200 at the moment of load starting, the speed of the internal combustion engine 100 will be reduced, and then the speed of the generator 200 will be reduced. The three-phase input voltage of the AC-DC rectifier unit 300 is too low, and the voltage u1 after rectification by the AC-DC rectifier unit 300 will also be reduced, which will cause the voltage u2 output by the DC-AC inverter unit 400 to the load to decrease; when the first voltage acquisition circuit 21 detects that u1 drops below the first voltage threshold, the power compensation unit 1 is enabled, and the power compensation unit 1 is in working state, and its output power is supplemented to the power input side of the DC bus as compensation power, so that the voltage u1 is increased, and then the voltage u2 output by the generator set is increased, so that the load can be started normally, thereby improving and enhancing the transient load capacity of the generator set.

[0058] In one embodiment, the power compensation unit 1 includes a battery module 11 and a boost compensation circuit 12, wherein:

[0059] The battery module 11 is used as a power source for the power compensation unit 1;

[0060] The power input end of the boost compensation circuit 12 is connected to the output end of the battery module 11, and the power output end of the boost compensation circuit 12 is connected to the end of the DC bus close to the AC-DC rectifier unit 300 as the power output end of the power compensation unit 1. The enable end of the boost compensation circuit 12 is connected to the signal output end of the compensation control unit 2 as the control end of the power compensation unit 1. The boost compensation circuit 12 is used to compensate the power output of the battery module 11 to the power input side of the DC bus under the control of the boost module.

[0061] In this embodiment, the power compensation unit 1 is provided with a battery module 11 and a boost compensation circuit 12. The battery module 11 serves as the power source of the power compensation unit 1. Under the control of the boost module, the boost compensation circuit 12 compensates the power output of the battery module 11 to the power input side of the DC bus, thereby increasing the peak power of the generator set when the transient power of the generator set is insufficient, thereby realizing instantaneous power compensation.

[0062] In one embodiment, the battery module 11 uses the starting battery of the generator set. Since the generator set usually has its own battery as a starting power source, in this embodiment, the battery module 11 uses the starting battery of the generator set, and there is no need to install additional batteries, which effectively reduces the production and use costs of the generator set transient power compensation system and the generator set.

[0063] In one embodiment, the boost compensation circuit 12 adopts a Boost boost circuit. The Boost boost circuit uses the energy storage element inductance as an intermittent power source, which is connected in series with the input power supply to achieve a boost. The Boost boost circuit includes components such as an inductor L, a capacitor C, a power switch tube Q, and an anti-backflow diode D. When the power output of the battery module 11 is used to compensate the DC bus through the Boost boost circuit, the voltage output to the DC bus can be controlled by controlling the conduction time of the power switch tube Q. The specific circuit structure of the Boost boost circuit belongs to the prior art and will not be repeated here.

[0064] like Figure 1 , Figure 2 As shown, in one embodiment, the compensation control unit 2 includes a first voltage acquisition circuit 21 and a first boost control module 22, wherein:

[0065] The signal acquisition end of the first voltage acquisition circuit 21 is connected to the DC bus as the signal input end of the compensation control unit 2, and the signal output end of the first voltage acquisition circuit 21 is connected to the signal input end of the first boost control module 22. The first voltage acquisition circuit 21 is used to collect the voltage signal of the DC bus in real time;

[0066] The signal output end of the first boost control module 22 is connected to the enable end of the boost compensation circuit 12 as the signal output end of the compensation control unit 2. The first boost control module 22 is used to control the working state of the boost compensation circuit 12 according to the voltage signal collected by the first voltage collection circuit 21.

[0067] In this embodiment, the compensation control unit 2 is configured with a first voltage acquisition circuit 21 and a first boost control module 22. The voltage signal of the DC bus is acquired in real time by the first voltage acquisition circuit 21 and transmitted to the first boost control module 22. The first boost control module 22 controls the working state of the boost compensation circuit 12 according to the voltage signal acquired by the first voltage acquisition circuit 21, that is, the first boost control module 22 controls the opening or closing of the boost compensation circuit 12 according to the voltage signal acquired by the first voltage acquisition circuit 21, so that the boost compensation circuit 12 inputs compensation power to the DC bus or stops inputting compensation power.

[0068] Specifically, in this embodiment, the DC bus includes a DC positive bus and a DC negative bus. The positive pole of the signal acquisition end of the first voltage acquisition circuit 21 is connected to the DC positive bus, and the negative pole of the signal acquisition end of the first voltage acquisition circuit 21 is connected to the DC negative bus. The voltage signal between the DC positive bus and the DC negative bus is collected in real time by the first voltage acquisition circuit 21.

[0069] In one embodiment, when the first boost control module 22 controls the working state of the boost compensation circuit 12 according to the voltage signal collected by the first voltage collection circuit 21, it is specifically used to:

[0070] The first boost control module 22 compares the voltage signal collected by the first voltage collection circuit 21 with a preset first voltage threshold.

[0071] When the voltage signal collected by the first voltage collection circuit 21 is less than the first voltage threshold, the first boost control module 22 outputs a high level, and the enable terminal of the boost compensation circuit 12 is energized to turn on the boost compensation circuit 12 and enter a working state, so as to compensate the power output of the battery module 11 to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the DC bus.

[0072] When the voltage signal collected by the first voltage collection circuit 21 is greater than or equal to the first voltage threshold, the first boost control module 22 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to shut down the boost compensation circuit 12 and exit the working state, so as to no longer consume the power of the battery module 11.

[0073] In this embodiment, the voltage signal collected by the first voltage collection circuit 21 is compared with a preset first voltage threshold value through the first boost control module 22. Only when the voltage signal collected by the first voltage collection circuit 21 is less than the first voltage threshold value, indicating that the output power of the generator set is insufficient at this time, the first boost control module 22 outputs a high level, so that the enable end of the boost compensation circuit 12 is energized, so that the boost compensation circuit 12 is turned on and enters the working state, and the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the DC bus. Otherwise, the first boost control module 22 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, thereby no longer consuming the power of the battery module 11.

[0074] Specifically, in this embodiment, the first boost control module 22 can adopt an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented by a comparator. One input terminal of the comparator is connected to a threshold memory, and the threshold memory stores a first voltage threshold. The other input terminal of the comparator is connected to the signal output terminal of the first voltage acquisition circuit 21 to receive the voltage signal collected by the first voltage acquisition circuit 21. The comparator outputs a high-level signal or a low-level signal to the boost compensation circuit 12 according to the comparison result between the first voltage threshold and the collected voltage signal, thereby controlling the boost compensation circuit 12 to start or exit work.

[0075] Specifically, in this embodiment, the first voltage threshold is reasonably set according to the actual operating parameters and load requirements of the generator set. In practical applications, the first voltage threshold can be optimized and adjusted through experimental tests and data analysis to achieve the best power compensation effect.

[0076] In one embodiment, when the first boost control module 22 controls the working state of the boost compensation circuit 12 according to the voltage signal collected by the first voltage collection circuit 21, it is specifically used to:

[0077] The first boost control module 22 compares the voltage signal collected by the first voltage collection circuit 21 with a preset first voltage threshold.

[0078] When the voltage signal collected by the first voltage collection circuit 21 is less than the first voltage threshold, the first boost control module 22 outputs a high level, and the enable terminal of the boost compensation circuit 12 is energized to turn on the boost compensation circuit 12 and enter a working state, so as to compensate the power output of the battery module 11 to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the DC bus.

[0079] In the process of boosting the DC bus voltage, when the voltage signal collected by the first voltage collection circuit 21 is greater than the preset second voltage threshold, the first boost control module 22 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to shut down the boost compensation circuit 12 and exit the working state, so as to no longer consume the power of the battery module 11.

[0080] The first voltage threshold is smaller than the second voltage threshold.

[0081] In this embodiment, the voltage signal collected by the first voltage collection circuit 21 is compared with a preset first voltage threshold through the first boost control module 22. When the voltage signal collected by the first voltage collection circuit 21 is less than the first voltage threshold, the first boost control module 22 outputs a high level, and the enable end of the boost compensation circuit 12 is powered on to turn on the boost compensation circuit 12 and enter the working state, so that the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the DC bus. In the process of boosting the DC bus voltage, when the voltage signal collected by the first voltage collection circuit 21 is greater than a preset second voltage threshold that is greater than the first voltage threshold, the first boost control module 22 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, thereby no longer consuming the power of the battery module 11. By controlling the boost compensation circuit 12 to shut down when the voltage signal collected by the first voltage collection circuit 21 is greater than a preset second voltage threshold that is greater than the first voltage threshold, the boost compensation circuit 12 can be effectively prevented from being frequently opened and closed, and the boost compensation circuit 12 can be effectively prevented from overheating due to frequent switching.

[0082] Specifically, in this embodiment, the first boost control module 22 can adopt an MCU microcontroller or a voltage comparator circuit composed of a hardware circuit. The voltage comparator circuit can be implemented by two comparators and a self-locking circuit, wherein the reference voltage of the first comparator is the first voltage threshold, and the reference voltage of the second comparator is the second voltage threshold. The inputs of the two comparators are connected to the output of the first voltage acquisition circuit 21. When the input voltage of the first comparator is lower than the first voltage threshold, a high level is output to the boost compensation circuit 12, and the boost compensation circuit 12 starts to work. At this time, the self-locking circuit is turned on to keep the first comparator outputting a high level. When the input voltage of the second comparator is higher than the second voltage threshold, the second comparator outputs a high level to trigger the self-locking circuit to turn off, so that the output end of the first comparator outputs a low level to the boost compensation circuit 12, and the boost compensation circuit 12 stops working.

[0083] The specific circuit connection relationship of the above-mentioned voltage comparator circuit can be obtained according to the above-mentioned functions, which belongs to the conventional technology in the field of comparators and will not be described in detail here.

[0084] It should be noted that if the first boost control module 22 adopts an MCU microcontroller, the voltage signal and the threshold voltage can be compared through the comparison device inside the MCU microcontroller and the corresponding level signal can be output to control the boost compensation circuit 12 without involving improvements to the control program.

[0085] Specifically, in this embodiment, the first voltage threshold and the second voltage threshold are reasonably set according to the actual operating parameters and load requirements of the generator set. In practical applications, the first voltage threshold and the second voltage threshold can be optimized and adjusted through experimental tests and data analysis to achieve the best power compensation effect.

[0086] In one embodiment, the transient power compensation system of the generator set further includes a filter unit 3, and the filter unit 3 is connected in parallel with the first voltage acquisition circuit 21. By setting the filter unit 3, the voltage signal collected by the first voltage acquisition circuit 21 is more accurate and reliable, thereby ensuring accurate switching of power compensation. Specifically, in this embodiment, the filter unit is implemented by a filter capacitor.

[0087] like Figure 3 As shown, in one embodiment, the compensation control unit 2 includes a second voltage acquisition circuit 23 and a second boost control module 24, wherein:

[0088] The signal acquisition end of the second voltage acquisition circuit 23 is connected to the AC output end of the DC-AC inverter unit 400 as the signal input end of the compensation control unit 2, and the signal output end of the second voltage acquisition circuit 23 is connected to the signal input end of the second boost control module 24. The second voltage acquisition circuit 23 is used to collect the voltage signal of the AC output end of the DC-AC inverter unit 400 in real time;

[0089] The signal output end of the second boost control module 24 is connected to the enable end of the boost compensation circuit 12 as the signal output end of the compensation control unit 2. The second boost control module 24 is used to control the working state of the boost compensation circuit 12 according to the voltage signal collected by the second voltage collection circuit 23.

[0090] In this embodiment, the compensation control unit 2 is provided with a second voltage acquisition circuit 23 and a second boost control module 24. The voltage signal of the AC output end of the DC-AC inverter unit 400 is collected in real time by the second voltage acquisition circuit 23 and transmitted to the second boost control module 24. The second boost control module 24 controls the working state of the boost compensation circuit 12 according to the voltage signal collected by the second voltage acquisition circuit 23, that is, the second boost control module 24 controls the opening or closing of the boost compensation circuit 12 according to the voltage signal collected by the second voltage acquisition circuit 23, so that the boost compensation circuit 12 inputs compensation power to the DC bus or stops inputting compensation power.

[0091] In one embodiment, the second boost control module 24 is specifically used to control the working state of the boost compensation circuit 12 according to the voltage signal collected by the second voltage collection circuit 23:

[0092] The second boost control module 24 compares the voltage signal collected by the second voltage collection circuit 23 with a preset third voltage threshold.

[0093] When the voltage signal collected by the second voltage collection circuit 23 is less than the third voltage threshold, the second boost control module 24 outputs a high level, and the enable end of the boost compensation circuit 12 is energized to turn on the boost compensation circuit 12 and enter a working state, so as to compensate the power output of the battery module 11 to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC bus.

[0094] When the voltage signal collected by the second voltage collection circuit 23 is greater than or equal to the third voltage threshold, the second boost control module 24 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to shut down the boost compensation circuit 12 and exit the working state, so as to no longer consume the power of the battery module 11.

[0095] In this embodiment, the voltage signal collected by the second voltage collection circuit 23 is compared with a preset third voltage threshold value through the second boost control module 24. Only when the voltage signal collected by the second voltage collection circuit 23 is less than the third voltage threshold value, indicating that the output power of the generator set is insufficient at this time, the second boost control module 24 outputs a high level, so that the enable end of the boost compensation circuit 12 is energized, so that the boost compensation circuit 12 is turned on and enters the working state, and the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC-AC inverter unit 400. Otherwise, the second boost control module 24 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, thereby no longer consuming the power of the battery module 11.

[0096] Specifically, in this embodiment, the second boost control module 24 can adopt an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented by a comparator. One input terminal of the comparator is connected to a threshold memory, and the threshold memory stores a third voltage threshold. The other input terminal of the comparator is connected to the signal output terminal of the second voltage acquisition circuit 23 to receive the voltage signal collected by the second voltage acquisition circuit 23. The comparator outputs a high-level signal or a low-level signal to the boost compensation circuit 12 according to the comparison result between the third voltage threshold and the collected voltage signal, thereby controlling the boost compensation circuit 12 to start or exit work.

[0097] Specifically, in this embodiment, the third voltage threshold is reasonably set according to the actual operating parameters and load requirements of the generator set. In practical applications, the third voltage threshold can be optimized and adjusted through experimental tests and data analysis to achieve the best power compensation effect.

[0098] In one embodiment, the second boost control module 24 is specifically used to control the working state of the boost compensation circuit 12 according to the voltage signal collected by the second voltage collection circuit 23:

[0099] The second boost control module 24 compares the voltage signal collected by the second voltage collection circuit 23 with a preset third voltage threshold.

[0100] When the voltage signal collected by the second voltage collection circuit 23 is less than the third voltage threshold, the second boost control module 24 outputs a high level, and the enable end of the boost compensation circuit 12 is energized to turn on the boost compensation circuit 12 and enter a working state, so as to compensate the power output of the battery module 11 to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC-AC inverter unit 400.

[0101] During the process of increasing the voltage at the AC output terminal of the DC-AC inverter unit 400, when the voltage signal collected by the second voltage collection circuit 23 is greater than the preset second voltage threshold, the second boost control module 24 outputs a low level, and the enable terminal of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, so as to no longer consume the power of the battery module 11.

[0102] The third voltage threshold is smaller than the second voltage threshold.

[0103] In this embodiment, the voltage signal collected by the second voltage collection circuit 23 is compared with a preset third voltage threshold through the second boost control module 24. When the voltage signal collected by the second voltage collection circuit 23 is less than the third voltage threshold, the second boost control module 24 outputs a high level, and the enable end of the boost compensation circuit 12 is powered on to turn on the boost compensation circuit 12 and enter the working state, so that the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC-AC inverter unit 400. In the process of increasing the voltage of the AC output end of the DC-AC inverter unit 400, when the voltage signal collected by the second voltage collection circuit 23 is greater than a preset second voltage threshold that is greater than the third voltage threshold, the second boost control module 24 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, thereby no longer consuming the power of the battery module 11. By controlling the boost compensation circuit 12 to shut down when the voltage signal collected by the second voltage collection circuit 23 is greater than a preset second voltage threshold that is greater than the third voltage threshold, the boost compensation circuit 12 can be effectively prevented from being frequently opened and closed, and the boost compensation circuit 12 can be effectively prevented from overheating due to frequent switching.

[0104] Specifically, in this embodiment, the second boost control module 24 can adopt a voltage comparator circuit composed of an MCU microcontroller or a hardware circuit. The voltage comparator circuit can be implemented by two comparators and a self-locking circuit, wherein the reference voltage of the first comparator is the third voltage threshold, and the reference voltage of the second comparator is the second voltage threshold. The inputs of the two comparators are connected to the output of the second voltage acquisition circuit 23. When the input voltage of the first comparator is lower than the third voltage threshold, a high level is output to the boost compensation circuit 12, and the boost compensation circuit 12 starts to work. At this time, the self-locking circuit is turned on to keep the first comparator outputting a high level. When the input voltage of the second comparator is higher than the second voltage threshold, the second comparator outputs a high level to trigger the self-locking circuit to turn off, so that the output end of the first comparator outputs a low level to the boost compensation circuit 12, and the boost compensation circuit 12 stops working.

[0105] The specific circuit connection relationship of the above-mentioned voltage comparator circuit can be obtained according to the above-mentioned functions, which belongs to the conventional technology in the field of comparators and will not be described in detail here.

[0106] It should be noted that if the second boost control module 24 adopts an MCU microcontroller, the voltage signal and the threshold voltage can be compared through the comparison device inside the MCU microcontroller and the corresponding level signal can be output to control the boost compensation circuit 12 without involving improvements to the control program.

[0107] Specifically, in this embodiment, the third voltage threshold and the second voltage threshold are reasonably set according to the actual operating parameters and load requirements of the generator set. In practical applications, the third voltage threshold and the second voltage threshold can be optimized and adjusted through experimental tests and data analysis to achieve the best power compensation effect.

[0108] like Figure 4 As shown, in one embodiment, the compensation control unit 2 includes a speed signal acquisition circuit 25 and a third boost control module 26, wherein:

[0109] The signal acquisition end of the speed signal acquisition circuit 25 is connected to the power output end of the generator 200 as the signal input end of the compensation control unit 2, and the signal output end of the speed signal acquisition circuit 25 is connected to the signal input end of the third boost control module 26. The speed signal acquisition circuit 25 is used to collect the frequency signal of the voltage output by the power output end of the generator 200 in real time, and convert the frequency signal into a corresponding speed signal;

[0110] The signal output end of the third boost control module 26 is connected to the enable end of the boost compensation circuit 12 as the signal output end of the compensation control unit 2. The third boost control module 26 is used to control the working state of the boost compensation circuit 12 according to the speed signal transmitted by the speed signal acquisition circuit 25.

[0111] In this embodiment, the compensation control unit 2 is provided with a speed signal acquisition circuit 25 and a third boost control module 26. The speed signal acquisition circuit 25 acquires the speed signal of the generator 200 in real time and transmits it to the third boost control module 26. The third boost control module 26 controls the working state of the boost compensation circuit 12 according to the speed signal acquired by the speed signal acquisition circuit 25, that is, the third boost control module 26 controls the opening or closing of the boost compensation circuit 12 according to the speed signal acquired by the speed signal acquisition circuit 25, so that the boost compensation circuit 12 inputs compensation power to the DC bus or stops inputting compensation power.

[0112] In one embodiment, the third boost control module 26 is specifically used to control the working state of the boost compensation circuit 12 according to the speed signal collected by the speed signal collection circuit 25:

[0113] The third boost control module 26 compares the speed signal collected by the speed signal collection circuit 25 with a preset speed threshold.

[0114] When the speed signal collected by the speed signal collection circuit 25 is less than the speed threshold, the third boost control module 26 outputs a high level, and the enable end of the boost compensation circuit 12 is energized to turn on the boost compensation circuit 12 and enter a working state, so that the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC bus.

[0115] When the speed signal collected by the speed signal acquisition circuit 25 is greater than or equal to the speed threshold, the third boost control module 26 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to shut down the boost compensation circuit 12 and exit the working state, so as to no longer consume the power of the battery module 11.

[0116] In this embodiment, the speed signal collected by the speed signal acquisition circuit 25 is compared with a preset speed threshold through the third boost control module 26. Only when the speed signal collected by the speed signal acquisition circuit 25 is less than the speed threshold, indicating that the output power of the generator set is insufficient at this time, the third boost control module 26 outputs a high level, so that the enable end of the boost compensation circuit 12 is energized, so that the boost compensation circuit 12 is turned on and enters the working state, and the power output of the battery module 11 is compensated to the power input side of the DC bus through the boost compensation circuit 12 to increase the voltage of the AC output end of the DC-AC inverter unit 400. Otherwise, the third boost control module 26 outputs a low level, and the enable end of the boost compensation circuit 12 is powered off to turn off the boost compensation circuit 12 and exit the working state, thereby no longer consuming the power of the battery module 11.

[0117] Specifically, in this embodiment, the third boost control module 26 can adopt an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented by a comparator. One input terminal of the comparator is connected to a threshold memory, and the threshold memory stores a speed threshold. The other input terminal of the comparator is connected to the signal output terminal of the speed signal acquisition circuit 25 to receive the speed signal collected by the speed signal acquisition circuit 25. The comparator outputs a high-level signal or a low-level signal to the boost compensation circuit 12 according to the comparison result between the speed threshold and the collected voltage signal, thereby controlling the boost compensation circuit 12 to start or exit work.

[0118] Specifically, in this embodiment, the speed threshold is reasonably set according to the actual operating parameters and load requirements of the generator set. In practical applications, the speed threshold can be optimized and adjusted through experimental tests and data analysis to achieve the best power compensation effect.

[0119] The specific circuit connection relationship of the above-mentioned voltage comparator circuit can be obtained according to the above-mentioned functions, which belongs to the conventional technology in the field of comparators and will not be described in detail here.

[0120] It should be noted that if the third boost control module 26 adopts an MCU microcontroller, the voltage signal and the threshold voltage can be compared through the comparison device inside the MCU microcontroller and the corresponding level signal can be output to control the boost compensation circuit 12 without involving improvements to the control program.

[0121] like Figure 5 As shown, an embodiment of the present invention further provides a generator set, comprising the generator set transient power compensation system in any of the above embodiments.

[0122] The generator set in this embodiment has the same working principle and technical effect as the transient power compensation system of the generator set in the above embodiment, which will not be described in detail here.

[0123] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0124] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0125] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, software modules executed by a processor, or a combination of the two. The software modules may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0126] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transient power compensation system for a generator set, characterized in that: The generator set includes an internal combustion engine, a generator, an AC-DC rectifier unit and a DC-AC inverter unit, the internal combustion engine is drivingly connected to the generator, the power output end of the generator is connected to the AC input end of the AC-DC rectifier unit, the DC output end of the AC-DC rectifier unit is connected to the DC input end of the DC-AC inverter unit through a DC bus, and the AC output end of the DC-AC inverter unit is used to connect a load to supply power to the load; The transient power compensation system includes a power compensation unit and a compensation control unit, wherein the power output end of the power compensation unit is connected to one end of the DC bus close to the AC-DC rectifier unit, the control end of the power compensation unit is connected to the signal output end of the compensation control unit, and the signal input end of the compensation control unit is connected to the AC output end of the DC bus or the DC-AC inverter unit or the power output end of the generator, wherein: The compensation control unit is used to collect the voltage signal of the DC bus or the voltage signal of the AC output end of the DC-AC inverter unit or the speed signal of the generator, and control the working state of the power compensation unit according to the collected voltage signal or speed signal; The power compensation unit is used to compensate power to the power input side of the DC bus under the control of the compensation control unit.

2. The generator set transient power compensation system according to claim 1, characterized in that: The power compensation unit includes a battery module and a boost compensation circuit, wherein: The battery module is used as a power source for the power compensation unit; The power input end of the boost compensation circuit is connected to the output end of the battery module, the power output end of the boost compensation circuit is connected to the end of the DC bus close to the AC-DC rectifier unit as the power output end of the power compensation unit, the enable end of the boost compensation circuit is connected to the signal output end of the compensation control unit as the control end of the power compensation unit, and the boost compensation circuit is used to compensate the power output of the battery module to the power input side of the DC bus under the control of the boost module.

3. The generator set transient power compensation system according to claim 2, characterized in that: The battery module adopts the starting battery of the generator set.

4. The generator set transient power compensation system according to claim 2, characterized in that: The boost compensation circuit adopts a Boost boost circuit.

5. The generator set transient power compensation system according to claim 2, characterized in that: The compensation control unit includes a first voltage acquisition circuit and a first boost control module, wherein: The signal acquisition end of the first voltage acquisition circuit is connected to the DC bus as the signal input end of the compensation control unit, the signal output end of the first voltage acquisition circuit is connected to the signal input end of the first boost control module, and the first voltage acquisition circuit is used to collect the voltage signal of the DC bus in real time; The signal output end of the first boost control module is connected to the enable end of the boost compensation circuit as the signal output end of the compensation control unit, and the first boost control module is used to control the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit.

6. The generator set transient power compensation system according to claim 5, characterized in that: When the first boost control module controls the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit, it is specifically used to: The first boost control module compares the voltage signal collected by the first voltage collection circuit with a preset first voltage threshold. When the voltage signal collected by the first voltage collection circuit is less than the first voltage threshold, the first boost control module outputs a high level, and the enable terminal of the boost compensation circuit is energized to turn on the boost compensation circuit and enter a working state, so as to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit to increase the voltage of the DC bus. When the voltage signal collected by the first voltage collection circuit is greater than or equal to the first voltage threshold, the first boost control module outputs a low level, and the enable end of the boost compensation circuit is powered off to shut down the boost compensation circuit and exit the working state, so as to no longer consume the electrical energy of the battery module.

7. The generator set transient power compensation system according to claim 5, characterized in that: When the first boost control module controls the working state of the boost compensation circuit according to the voltage signal collected by the first voltage collection circuit, it is specifically used to: The first boost control module compares the voltage signal collected by the first voltage collection circuit with a preset first voltage threshold. When the voltage signal collected by the first voltage collection circuit is less than the first voltage threshold, the first boost control module outputs a high level, and the enable terminal of the boost compensation circuit is energized to turn on the boost compensation circuit and enter a working state, so as to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit to increase the voltage of the DC bus. During the process of boosting the DC bus voltage, when the voltage signal collected by the first voltage collection circuit is greater than a preset second voltage threshold, the first boost control module outputs a low level, and the enable end of the boost compensation circuit is powered off to shut down the boost compensation circuit and exit the working state, so as to no longer consume the power of the battery module. The first voltage threshold is smaller than the second voltage threshold.

8. The generator set transient power compensation system according to any one of claims 5 to 7, characterized in that: The boost module adopts an MCU microcontroller or a voltage comparator circuit.

9. The generator set transient power compensation system according to claim 8, characterized in that: It also includes a filtering unit, and the filtering unit is connected in parallel with the first voltage collection circuit.

10. A generator set, characterized in that: A transient power compensation system for a generator set comprising the system described in any one of claims 1 to 9.

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