Generator set transient power compensation system and generator set

Abstract

The utility model 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. According to the utility model, power can be timely supplemented at the moment when the generator set starts the load, and the transient load capacity of the internal combustion engine generator set is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of generator set technology, and in particular to a generator set transient power compensation system and a generator set. Background Technology

[0002] Internal combustion engine generator sets are widely used in many fields, including 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 generate a large peak power demand at startup. At this time, the internal combustion engine generator set will experience a drop in speed and output voltage.

[0003] This drop in speed and output voltage can 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, limiting its application scenarios and reducing its applicability and practicality.

[0004] Therefore, there is an urgent need for a technical solution that can effectively address the problem of speed and output voltage drop when starting an internal combustion engine generator set under a specific load. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a transient power compensation system and generator set to improve and enhance the transient load-carrying capacity of the generator set, solve the problem of speed and voltage drop caused by peak power demand when starting an internal combustion engine generator set with inductive or mixed inductive and capacitive loads, avoid load failure due to low voltage, and expand the applicable load range of the generator set.

[0006] The first objective of this invention is to provide a transient power compensation system for generator sets.

[0007] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0008] A transient power compensation system for a 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 driven and connected to the generator. The power output terminal of the generator is connected to the AC input terminal of the AC-DC rectifier unit. The DC output terminal of the AC-DC rectifier unit is connected to the DC input terminal of the DC-AC inverter unit via a DC bus. The AC output terminal 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. The power output terminal of the power compensation unit is connected to the end of the DC bus closest to the AC-DC rectifier unit. The control terminal of the power compensation unit is connected to the signal output terminal of the compensation control unit. The signal input terminal of the compensation control unit is connected to the AC output terminal of the DC bus, the DC-AC inverter unit, or the power output terminal of the generator.

[0010] The compensation control unit is used to collect the voltage signal of the DC bus, the voltage signal of the AC output terminal of the DC-AC inverter unit, or the speed signal of the output voltage of the power output terminal 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 includes 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 terminal of the boost compensation circuit is connected to the output terminal of the battery module. The power output terminal of the boost compensation circuit serves as the power output terminal of the power compensation unit and is connected to the end of the DC bus closest to the AC-DC rectifier unit. The enable terminal of the boost compensation circuit serves as the control terminal of the power compensation unit and is connected to the signal output terminal of the compensation control unit. 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 compensation control unit.

[0015] Preferably, the battery module is a starting battery that comes with the generator set.

[0016] Preferably, the boost compensation circuit is a Boost converter circuit.

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

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

[0019] The signal output terminal of the first boost control module is connected to the enable terminal of the boost compensation circuit as the signal output terminal of the compensation control unit. The first boost control module is used to control the working state of the boost compensation circuit according to the voltage signal acquired by the first voltage acquisition circuit.

[0020] Preferably, when the first boost control module controls the operating state of the boost compensation circuit based on the voltage signal acquired by the first voltage acquisition circuit, it is specifically used for:

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

[0022] When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit to enter the working state. In order to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit, thereby boosting the voltage of the DC bus.

[0023] When the voltage signal acquired by the first voltage acquisition circuit is greater than or equal to the first voltage threshold, the first boost control module outputs a low level, and the enable terminal of the boost compensation circuit is de-energized, causing the boost compensation circuit to shut down and exit the working state, so as to no longer consume the power of the battery module.

[0024] Preferably, when the first boost control module controls the operating state of the boost compensation circuit based on the voltage signal acquired by the first voltage acquisition circuit, it is specifically used for:

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

[0026] When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit to enter the working state. In order to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit, thereby boosting the voltage of the DC bus.

[0027] During the DC bus voltage boosting process, when the voltage signal acquired by the first voltage acquisition circuit exceeds a preset second voltage threshold, the first boost control module outputs a low level, and the enable terminal of the boost compensation circuit is de-energized, causing the boost compensation circuit to shut down and exit the working state, so as to no longer consume the power of the battery module.

[0028] Wherein, the first voltage threshold is less than the second voltage threshold.

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

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

[0031] The second objective of this invention is to provide a generator set.

[0032] The second objective of this utility model is achieved through the following technical solution:

[0033] A generator set includes the transient power compensation system for the generator set described in the first object of this utility model.

[0034] The beneficial effects of this utility model are as follows:

[0035] 1. It can promptly supplement power when the generator set starts an inductive load or a mixed inductive and capacitive load, effectively improving and enhancing the transient load-carrying capacity of the internal combustion engine generator set, and ensuring that the load can start smoothly;

[0036] 2. It solves the problem of load starting failure caused by voltage drop during generator set startup, thus expanding the applicable load range of the generator set and improving its versatility and practicality.

[0037] 3. By setting the voltage threshold reasonably, the power compensation requirements are met while avoiding frequent operation of the power compensation unit, reducing unnecessary energy consumption of the power compensation unit, improving energy utilization efficiency, and extending the service life of the power compensation unit. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

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

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

[0043] Figure 5 This is a schematic block diagram of a generator set in one embodiment of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

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

[0046] In addition, each functional unit in the various embodiments of this utility model can be integrated into a single processor, or each unit can be a separate device, or two or more units can be integrated into a single device; each functional unit in the various embodiments of this utility model can be implemented in hardware or in the form of hardware plus software functional units.

[0047] Those skilled in the art will understand that all or part of the steps of the following method embodiments can be implemented 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, they perform the steps of the following method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0049] like Figure 1-4 As shown, this utility model embodiment 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 driven and connected to the generator 200. The power output terminal of the generator 200 is connected to the AC input terminal of the AC-DC rectifier unit 300. The DC output terminal of the AC-DC rectifier unit 300 is connected to the DC input terminal of the DC-AC inverter unit 400 through a DC bus. The AC output terminal of the DC-AC inverter unit 400 is used to connect to the load and supply power to the load.

[0051] Specifically, the transient power compensation system includes a power compensation unit 1 and a compensation control unit 2. The power output terminal of the power compensation unit 1 is connected to the end of the DC bus closest to the AC-DC rectifier unit 300. The control terminal of the power compensation unit 1 is connected to the signal output terminal of the compensation control unit 2. The signal input terminal of the compensation control unit 2 is connected to the DC bus.

[0052] The compensation control unit 2 is used to acquire the voltage signal of the DC bus and control the working state of the power compensation unit 1 according to the acquired 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 generator transient power compensation system in this embodiment is as follows:

[0055] When the generator set is working, the internal combustion engine 100 drives the generator 200 to rotate. 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 switching 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 input side of the DC bus, providing instantaneous power compensation, thereby increasing the peak power of the generator set. This effectively improves and enhances the transient load-carrying capacity of the generator set, solves the problem of speed and voltage drop caused by peak power demand when the internal combustion engine 100 generator set starts inductive or mixed inductive and capacitive loads, avoids load starting failure due to low voltage, and expands the applicable load range of the generator set.

[0056] Specifically, under normal operating conditions, the voltage u1 output by the DC bus of the generator set 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 (where U1 > U2, U1 is set according to U2, U1 = U2 × 1.414 / inverter efficiency, the rated voltage U2 is determined according to the rated output voltage of the generator 200, and U2 is not lower 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 lower 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 the closed state.

[0057] When the load starts at the moment of load startup, if the starting current of the generator set is greater than the rated current of the generator 200, the speed of the internal combustion engine 100 will decrease, which in turn will cause the speed of the generator 200 to decrease. The three-phase input voltage of the AC-DC rectifier unit 300 will be too low, and the voltage u1 after rectification by the AC-DC rectifier unit 300 will also decrease, which in turn 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 has dropped below the first voltage threshold, the power compensation unit 1 is enabled and in working state. Its output power is used as compensation power to supplement the power input side of the DC bus, so that the voltage u1 is increased, which in turn increases the voltage u2 output by the generator set, so that the load can start normally, thereby improving and enhancing the transient load-carrying 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 terminal of the boost compensation circuit 12 is connected to the output terminal of the battery module 11. The power output terminal of the boost compensation circuit 12 is connected to the end of the DC bus near the AC-DC rectifier unit 300 as the power output terminal of the power compensation unit 1. The enable terminal of the boost compensation circuit 12 is connected to the signal output terminal of the compensation control unit 2 as the control terminal 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 compensation control unit.

[0061] In this embodiment, the power compensation unit 1 is equipped with a battery module 11 and a boost compensation circuit 12. The battery module 11 serves as the power source for the power compensation unit 1. Under the control of the compensation control unit, 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, and realizing instantaneous power compensation.

[0062] In one embodiment, the battery module 11 uses the generator set's built-in starting battery. Since generator sets typically come with their own batteries as starting power, in this embodiment, the battery module 11 uses the generator set's built-in starting battery, eliminating the need for additional battery installation, effectively reducing the production and operating costs of the generator set's transient power compensation system and the generator set itself.

[0063] In one embodiment, the boost compensation circuit 12 employs a Boost converter. The Boost converter uses the inductor, an energy storage element, as an intermittent power source, connected in series with the input power supply to achieve voltage boosting. The Boost converter includes components such as an inductor L, a capacitor C, a power switch Q, and an anti-reverse-current diode D. When the power output from the battery module 11 is used to compensate the DC bus via the Boost converter, the voltage output to the DC bus can be controlled by controlling the on-time of the power switch Q. The specific circuit structure of the Boost converter is prior art and will not be described in detail 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 terminal of the first voltage acquisition circuit 21 is connected to the DC bus as the signal input terminal of the compensation control unit 2, and the signal output terminal of the first voltage acquisition circuit 21 is connected to the signal input terminal of the first boost control module 22. The first voltage acquisition circuit 21 is used to acquire the voltage signal of the DC bus in real time.

[0066] The signal output terminal of the first boost control module 22 is connected to the enable terminal of the boost compensation circuit 12 as the signal output terminal 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 acquired by the first voltage acquisition circuit 21.

[0067] In this embodiment, the compensation control unit 2 is equipped with a first voltage acquisition circuit 21 and a first boost control module 22. The first voltage acquisition circuit 21 acquires the voltage signal of the DC bus in real time and transmits it 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 boost compensation circuit 12 to turn on or off 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 positive DC bus and a negative DC bus. The positive terminal of the signal acquisition terminal of the first voltage acquisition circuit 21 is connected to the positive DC bus, and the negative terminal of the signal acquisition terminal of the first voltage acquisition circuit 21 is connected to the negative DC bus. The voltage signal between the positive DC bus and the negative DC bus is acquired in real time through the first voltage acquisition circuit 21.

[0069] In one embodiment, when the first boost control module 22 controls the operating state of the boost compensation circuit 12 based on the voltage signal acquired by the first voltage acquisition circuit 21, it is specifically used for:

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

[0071] When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit 12 to enter the working state. In order 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, thereby boosting the voltage of the DC bus.

[0072] When the voltage signal acquired by the first voltage acquisition 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 terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, so as to no longer consume the power of the battery module 11.

[0073] In this embodiment, the first boost control module 22 compares the voltage signal acquired by the first voltage acquisition circuit 21 with a preset first voltage threshold. Only when the voltage signal acquired by the first voltage acquisition circuit 21 is less than the first voltage threshold, it indicates that the generator set output power is insufficient. In this case, the first boost control module 22 outputs a high level, which powers on the enable terminal of the boost compensation circuit 12, thereby turning on the boost compensation circuit 12 and putting it into operation. The boost compensation circuit 12 then compensates the power output of the battery module 11 to the power input side of the DC bus to boost the voltage of the DC bus. Otherwise, the first boost control module 22 outputs a low level, and the enable terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, thus no longer consuming the power of the battery module 11.

[0074] Specifically, in this embodiment, the first boost control module 22 can be an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented using a single comparator. One input of the comparator is connected to a threshold memory, which stores a first voltage threshold. The other input of the comparator is connected to the signal output of the first voltage acquisition circuit 21 to receive the voltage signal acquired 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 based on the comparison result between the first voltage threshold and the acquired voltage signal, thereby controlling the boost compensation circuit 12 to start or stop working.

[0075] Specifically, in this embodiment, the first voltage threshold is set reasonably based on 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 testing and data analysis to achieve the best power compensation effect.

[0076] In one embodiment, when the first boost control module 22 controls the operating state of the boost compensation circuit 12 based on the voltage signal acquired by the first voltage acquisition circuit 21, it is specifically used for:

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

[0078] When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit 12 to enter the working state. In order 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, thereby boosting the voltage of the DC bus.

[0079] During the DC bus voltage boosting process, when the voltage signal acquired by the first voltage acquisition circuit 21 is greater than the preset second voltage threshold, the first boost control module 22 outputs a low level, and the enable terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, so as to no longer consume the power of the battery module 11.

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

[0081] In this embodiment, the first boost control module 22 compares the voltage signal acquired by the first voltage acquisition circuit 21 with a preset first voltage threshold. When the voltage signal acquired by the first voltage acquisition 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 the working state. Thus, the boost compensation circuit 12 compensates the power output of the battery module 11 to the power input side of the DC bus to increase the voltage of the DC bus. During the process of increasing the DC bus voltage, when the voltage signal acquired by the first voltage acquisition 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 terminal of the boost compensation circuit 12 is de-energized to turn off the boost compensation circuit 12 and exit the working state, so as to stop consuming the power of the battery module 11. By controlling the boost compensation circuit 12 to shut down only when the voltage signal acquired by the first voltage acquisition circuit 21 is greater than a preset second voltage threshold which is greater than the first voltage threshold, the frequent switching of the boost compensation circuit 12 can be effectively avoided, thus preventing overheating caused by frequent switching of the boost compensation circuit 12.

[0082] Specifically, in this embodiment, the first boost control module 22 can be a voltage comparator circuit composed of an MCU microcontroller or a hardware circuit. The voltage comparator circuit can be implemented using two comparators and a self-locking circuit. The reference voltage of the first comparator is a first voltage threshold, and the reference voltage of the second comparator is a second voltage threshold. The inputs of both 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, it outputs a high level 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, thereby causing the output of the first comparator to output 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 voltage comparator circuit described above can be obtained from the above functions. It 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 uses an MCU microcontroller, the voltage signal and the threshold voltage can be compared by the comparator inside the MCU microcontroller and the corresponding level signal can be output to control the boost compensation circuit 12 without involving any improvement 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 testing and data analysis to achieve the best power compensation effect.

[0086] In one embodiment, the generator transient power compensation system further includes a filter unit 3, which is connected in parallel with the first voltage acquisition circuit 21. By setting the filter unit 3, the voltage signal acquired by the first voltage acquisition circuit 21 is made more accurate and reliable, thereby ensuring accurate power compensation. Specifically, in this embodiment, the filter unit is implemented using 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 terminal of the second voltage acquisition circuit 23 is connected to the AC output terminal of the DC-AC inverter unit 400 as the signal input terminal of the compensation control unit 2. The signal output terminal of the second voltage acquisition circuit 23 is connected to the signal input terminal of the second boost control module 24. The second voltage acquisition circuit 23 is used to acquire the voltage signal of the AC output terminal of the DC-AC inverter unit 400 in real time.

[0089] The signal output terminal of the second boost control module 24 is connected to the enable terminal of the boost compensation circuit 12 as the signal output terminal 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 acquired by the second voltage acquisition circuit 23.

[0090] In this embodiment, the compensation control unit 2 is equipped with a second voltage acquisition circuit 23 and a second boost control module 24. The second voltage acquisition circuit 23 acquires the voltage signal of the AC output terminal of the DC-AC inverter unit 400 in real time and transmits it 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 acquired by the second voltage acquisition circuit 23. That is, the second boost control module 24 controls the boost compensation circuit 12 to turn on or off according to the voltage signal acquired 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, when the second boost control module 24 controls the operating state of the boost compensation circuit 12 based on the voltage signal acquired by the second voltage acquisition circuit 23, it is specifically used for:

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

[0093] When the voltage signal acquired by the second voltage acquisition circuit 23 is less than the third voltage threshold, the second boost control module 24 outputs a high level, and the enable terminal of the boost compensation circuit 12 is energized, enabling the boost compensation circuit 12 to enter the working state. In order 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, thereby increasing the voltage of the AC output terminal of the DC bus.

[0094] When the voltage signal acquired by the second voltage acquisition 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 terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, so as to no longer consume the power of the battery module 11.

[0095] In this embodiment, the second boost control module 24 compares the voltage signal collected by the second voltage acquisition circuit 23 with a preset third voltage threshold. Only when the voltage signal collected by the second voltage acquisition circuit 23 is less than the third voltage threshold, it indicates that the generator set output power is insufficient. In this case, the second boost control module 24 outputs a high level, which powers on the enable terminal of the boost compensation circuit 12, thereby turning on the boost compensation circuit 12 and putting it into operation. The boost compensation circuit 12 compensates the power output of the battery module 11 to the power input side of the DC bus to increase the voltage of the AC output terminal of the DC-AC inverter unit 400. Otherwise, the second boost control module 24 outputs a low level, and the enable terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, thus no longer consuming the power of the battery module 11.

[0096] Specifically, in this embodiment, the second boost control module 24 can be an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented using a single comparator. One input of the comparator is connected to a threshold memory, which stores a third voltage threshold. The other input of the comparator is connected to the signal output of the second voltage acquisition circuit 23 to receive the voltage signal acquired 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 based on the comparison result between the third voltage threshold and the acquired voltage signal, thereby controlling the boost compensation circuit 12 to start or stop working.

[0097] Specifically, in this embodiment, the third voltage threshold is set reasonably based on 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 testing and data analysis to achieve the best power compensation effect.

[0098] In one embodiment, when the second boost control module 24 controls the operating state of the boost compensation circuit 12 based on the voltage signal acquired by the second voltage acquisition circuit 23, it is specifically used for:

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

[0100] When the voltage signal acquired by the second voltage acquisition circuit 23 is less than the third voltage threshold, the second boost control module 24 outputs a high level, and the enable terminal of the boost compensation circuit 12 is energized, enabling the boost compensation circuit 12 to enter the working state. In order 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, thereby increasing the voltage of the AC output terminal of the DC-AC inverter unit 400.

[0101] During the voltage boosting process at the AC output terminal of the DC-AC inverter unit 400, when the voltage signal acquired by the second voltage acquisition circuit 23 exceeds 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 de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, so as to no longer consume the power of the battery module 11.

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

[0103] In this embodiment, the second boost control module 24 compares the voltage signal acquired by the second voltage acquisition circuit 23 with a preset third voltage threshold. When the voltage signal acquired by the second voltage acquisition circuit 23 is less than the third voltage threshold, the second boost control module 24 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 the working state. Thus, the boost compensation circuit 12 compensates the power output of the battery module 11 to the power input side of the DC bus to increase the voltage of the AC output terminal of the DC-AC inverter unit 400. During the process of increasing the AC output terminal voltage of the DC-AC inverter unit 400, when the voltage signal acquired by the second voltage acquisition circuit 23 is greater than the preset second voltage threshold which is greater than the third voltage threshold, the second boost control module 24 outputs a low level, and the enable terminal of the boost compensation circuit 12 is de-energized to turn off the boost compensation circuit 12 and exit the working state, so as to stop consuming the power of the battery module 11. By controlling the boost compensation circuit 12 to shut down only when the voltage signal acquired by the second voltage acquisition circuit 23 is greater than the preset second voltage threshold which is greater than the third voltage threshold, the frequent opening and closing of the boost compensation circuit 12 can be effectively avoided, thus preventing overheating caused by frequent switching of the boost compensation circuit 12.

[0104] Specifically, in this embodiment, the second boost control module 24 can be a voltage comparator circuit composed of an MCU microcontroller or a hardware circuit. The voltage comparator circuit can be implemented using two comparators and a self-locking circuit. 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 both 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, it outputs a high level 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, thereby causing the output of the first comparator to output 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 voltage comparator circuit described above can be obtained from the above functions. It 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 uses an MCU microcontroller, the voltage signal and the threshold voltage can be compared through the comparator inside the MCU microcontroller, and the corresponding level signal can be output to control the boost compensation circuit 12 without involving any improvement 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 testing 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 terminal of the speed signal acquisition circuit 25 is connected to the power output terminal of the generator 200 as the signal input terminal of the compensation control unit 2. The signal output terminal of the speed signal acquisition circuit 25 is connected to the signal input terminal of the third boost control module 26. The speed signal acquisition circuit 25 is used to acquire the frequency signal of the voltage output by the power output terminal of the generator 200 in real time and convert the frequency signal into the corresponding speed signal.

[0110] The signal output terminal of the third boost control module 26 is connected to the enable terminal of the boost compensation circuit 12 as the signal output terminal 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 from the speed signal acquisition circuit 25.

[0111] In this embodiment, the compensation control unit 2 is equipped 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 boost compensation circuit 12 to turn on or off 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, when the third boost control module 26 controls the operation of the boost compensation circuit 12 based on the speed signal acquired by the speed signal acquisition circuit 25, it is specifically used for:

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

[0114] When the speed signal acquired by the speed signal acquisition circuit 25 is less than the speed threshold, the third boost control module 26 outputs a high level, and the enable terminal of the boost compensation circuit 12 is energized, enabling the boost compensation circuit 12 to enter the working state. In order 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, thereby increasing the voltage of the AC output terminal of the DC bus.

[0115] When the speed signal acquired 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 terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the working state, so as to no longer consume the power of the battery module 11.

[0116] In this embodiment, the third boost control module 26 compares the speed signal acquired by the speed signal acquisition circuit 25 with a preset speed threshold. Only when the speed signal acquired by the speed signal acquisition circuit 25 is less than the speed threshold, it indicates that the generator set output power is insufficient. In this case, the third boost control module 26 outputs a high level, which powers on the enable terminal of the boost compensation circuit 12, thereby turning on the boost compensation circuit 12 and putting it into operation. The boost compensation circuit 12 compensates the power output of the battery module 11 to the power input side of the DC bus to increase the voltage of the AC output terminal of the DC-AC inverter unit 400. Otherwise, the third boost control module 26 outputs a low level, and the enable terminal of the boost compensation circuit 12 is de-energized, causing the boost compensation circuit 12 to shut down and exit the operation state, thus no longer consuming the power of the battery module 11.

[0117] Specifically, in this embodiment, the third boost control module 26 can be an MCU microcontroller or a voltage comparator circuit. The voltage comparator circuit can be implemented using a single comparator. One input of the comparator is connected to a threshold memory, which stores the speed threshold. The other input of the comparator is connected to the signal output of the speed signal acquisition circuit 25 to receive the speed signal acquired 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 based on the comparison result between the speed threshold and the acquired voltage signal, thereby controlling the boost compensation circuit 12 to start or stop working.

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

[0119] The specific circuit connection relationship of the voltage comparator circuit described above can be obtained from the above functions. It 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 uses an MCU microcontroller, the voltage signal and the threshold voltage can be compared through the comparator inside the MCU microcontroller, and the corresponding level signal can be output to control the boost compensation circuit 12 without involving any improvement to the control program.

[0121] like Figure 5 As shown, this utility model embodiment also provides a generator set, including 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, and will not be described again here.

[0123] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0124] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

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

[0126] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those 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 is not to be limited to the embodiments shown herein, but is to be accorded 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 driven and connected to the generator. The power output terminal of the generator is connected to the AC input terminal of the AC-DC rectifier unit. The DC output terminal of the AC-DC rectifier unit is connected to the DC input terminal of the DC-AC inverter unit through a DC bus. The AC output terminal of the DC-AC inverter unit is used to connect to the load and supply power to the load. The transient power compensation system includes a power compensation unit and a compensation control unit. The power output terminal of the power compensation unit is connected to the end of the DC bus closest to the AC-DC rectifier unit. The control terminal of the power compensation unit is connected to the signal output terminal of the compensation control unit. The signal input terminal of the compensation control unit is connected to the AC output terminal of the DC bus, the DC-AC inverter unit, or the power output terminal of the generator. The compensation control unit is used to collect the voltage signal of the DC bus, the voltage signal of the AC output terminal 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 terminal of the boost compensation circuit is connected to the output terminal of the battery module. The power output terminal of the boost compensation circuit serves as the power output terminal of the power compensation unit and is connected to the end of the DC bus closest to the AC-DC rectifier unit. The enable terminal of the boost compensation circuit serves as the control terminal of the power compensation unit and is connected to the signal output terminal of the compensation control unit. 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 compensation control unit.

3. The generator set transient power compensation system according to claim 2, characterized in that, The battery module uses the generator set's own starting battery.

4. The generator set transient power compensation system according to claim 2, characterized in that, The boost compensation circuit uses a 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 terminal of the first voltage acquisition circuit is connected to the DC bus as the signal input terminal of the compensation control unit, and the signal output terminal of the first voltage acquisition circuit is connected to the signal input terminal of the first boost control module. The first voltage acquisition circuit is used to acquire the voltage signal of the DC bus in real time. The signal output terminal of the first boost control module is connected to the enable terminal of the boost compensation circuit as the signal output terminal of the compensation control unit. The first boost control module is used to control the working state of the boost compensation circuit according to the voltage signal acquired by the first voltage acquisition circuit.

6. The generator set transient power compensation system according to claim 5, characterized in that, When the first boost control module controls the operating state of the boost compensation circuit based on the voltage signal acquired by the first voltage acquisition circuit, it is specifically used for: The first boost control module compares the voltage signal acquired by the first voltage acquisition circuit with a preset first voltage threshold. When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit to enter the working state. In order to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit, thereby boosting the voltage of the DC bus. When the voltage signal acquired by the first voltage acquisition circuit is greater than or equal to the first voltage threshold, the first boost control module outputs a low level, and the enable terminal of the boost compensation circuit is de-energized, causing the boost compensation circuit to shut down and exit the working state, so as to no longer consume the power 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 operating state of the boost compensation circuit based on the voltage signal acquired by the first voltage acquisition circuit, it is specifically used for: The first boost control module compares the voltage signal acquired by the first voltage acquisition circuit with a preset first voltage threshold. When the voltage signal acquired by the first voltage acquisition 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, enabling the boost compensation circuit to enter the working state. In order to compensate the power output of the battery module to the power input side of the DC bus through the boost compensation circuit, thereby boosting the voltage of the DC bus. During the DC bus voltage boosting process, when the voltage signal acquired by the first voltage acquisition circuit exceeds a preset second voltage threshold, the first boost control module outputs a low level, and the enable terminal of the boost compensation circuit is de-energized, causing the boost compensation circuit to shut down and exit the working state, so as to no longer consume the power of the battery module. Wherein, the first voltage threshold is less than the second voltage threshold.

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

9. The transient power compensation system for generator sets according to claim 8, characterized in that, It also includes a filtering unit, which is connected in parallel with the first voltage acquisition circuit.

10. A generator set, characterized in that, Includes the generator set transient power compensation system as described in any one of claims 1-9.

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