Generator set rotating speed control method, generator set, energy storage power generation system

Abstract

The application relates to the technical field of generator control, and provides a generator set rotating speed control method, a generator set and an energy storage power generation system, the generator set is in communication connection with an energy storage device, and the method comprises the following steps: receiving a first signal sent by the energy storage device, wherein the first signal comprises a first power requested by the energy storage device; when the first power is smaller than the rated power of the generator set, determining a first rotating speed according to the first power; the first rotating speed is smaller than the rated rotating speed of the generator set; and the rotating speed of the generator set is adjusted to the first rotating speed. According to the first power, the rotating speed of the generator set can be adjusted, the generator set works at the first rotating speed which is smaller than the rated rotating speed, and therefore the noise can be adaptively reduced when the load of the generator set is the energy storage device.

Description

Technical Field

[0001] This application relates to the field of generator control technology, and in particular to a generator set speed control method, a generator set, and an energy storage power generation system. Background Technology

[0002] A generator set generally refers to a complete set of mechanical equipment that converts other forms of energy into electrical energy, and may include an engine, a generator, etc. Currently, when a power frequency generator set supplies power to a load, the engine in the power frequency generator set drives the generator to generate electricity. During this process, the operator usually sets the generator set to operate at its rated power.

[0003] However, in reality, the engine noise is quite high when it is operating at its rated speed; but there is currently no good mechanism to reduce the noise generated when the engine is operating. Summary of the Invention

[0004] This application provides a generator set speed control method, system, electronic device, and storage medium.

[0005] In a first aspect, embodiments of this application provide a generator set speed control method, wherein the generator set is communicatively connected to an energy storage device, and the method includes:

[0006] Receive a first signal sent by the energy storage device, the first signal including a first power request from the energy storage device;

[0007] When the first power is less than the rated power of the generator set, the first speed is determined based on the first power; the first speed is less than the rated speed of the generator set.

[0008] Adjust the generator set speed to the first speed.

[0009] In a generator set speed control method provided in this application embodiment, the first power includes a preset power range. Before determining the first speed based on the first power, the method includes:

[0010] When the rated power of the generator set is greater than the lowest value of the preset power range, the first power is determined to be less than the rated power of the generator set.

[0011] In a generator set speed control method provided in this application embodiment, the first power includes a preset power range, and the step of determining the first speed based on the first power when the first power is less than the rated power of the generator set includes:

[0012] When the first power is less than the rated power of the generator set, the target output power of the generator set is determined according to the lowest value of the preset power range;

[0013] The first rotational speed is determined based on the target output power.

[0014] In a generator set speed control method provided in this application embodiment, determining the first speed based on the target output power includes:

[0015] Based on a preset mapping relationship between the output power and rotational speed of the generator set, the rotational speed corresponding to the target output power is determined as the first rotational speed.

[0016] In a generator set speed control method provided in this application embodiment, the first signal further includes a first frequency range, and the step of determining the target output power of the generator set based on the lowest value of the preset power range includes:

[0017] The first output power of the generator set is determined based on the lowest value of the preset power range;

[0018] Based on a preset mapping relationship between the output power and speed of the generator set, the second speed corresponding to the first output power is determined;

[0019] Calculate the corresponding first output frequency of the generator set based on the second rotational speed;

[0020] When the first output frequency falls within the first frequency range, the first output power is determined to be the target output power.

[0021] In a generator set speed control method provided in this application embodiment, the method further includes:

[0022] When the first power is greater than or equal to the rated power of the generator set, the speed of the generator set is maintained at the rated speed.

[0023] In a generator set speed control method provided in this application embodiment, the method further includes:

[0024] When the first power is greater than or equal to the rated power of the generator set, a first feedback message is sent to the energy storage device; the first feedback message is used to instruct the energy storage device to reduce the first power.

[0025] Secondly, this application also provides a generator set speed control method, applied to an energy storage device, wherein the energy storage device is communicatively connected to the generator set, and the method includes:

[0026] When the generator set is detected to be connected, a first power is determined based on the power information of the energy storage device and the load connection information; the first power is the input power that the energy storage device can receive.

[0027] A first signal is generated based on the first power, and the first signal is sent to the generator set; wherein the first signal is used to instruct the generator set to adjust its speed based on the first power.

[0028] Thirdly, this application also provides a generator set, characterized in that the generator set includes a generator and a controller, the controller being communicatively connected to the generator and an energy storage device, and the controller being used to execute the steps of the generator set speed control method described above.

[0029] Fourthly, this application also provides an energy storage power generation system, including a generator set, an energy storage device, and a controller. The controller is communicatively connected to the generator set and the energy storage device, and is used to execute the steps of the generator set speed control method described in the above embodiments.

[0030] Compared to existing technologies, the generator set speed control method provided in this application determines the first power that the energy storage device can accept by receiving a first signal sent by the energy storage device, and adjusts the generator set speed according to the first power so that the generator set operates at a first speed lower than the rated speed, thereby adaptively reducing noise when the generator set load is the energy storage device.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 The diagram shown illustrates the application environment of the generator set speed control method provided in this embodiment.

[0034] Figure 2 The diagram shown is a schematic flowchart of the generator set speed control method provided in an embodiment of this application;

[0035] Figure 3 The diagram shown is a flowchart of step S200 in the generator set speed control method provided in this application embodiment;

[0036] Figure 4 The figure shown is a diagram illustrating the relationship between rotational speed and power mapping provided in an embodiment of this application.

[0037] Figure 5 The diagram shown is a flowchart of step S201 in the first generator set speed control method provided in this application embodiment;

[0038] Figure 6 The diagram shown illustrates the application environment of another generator set speed control method provided in this application embodiment.

[0039] Figure 7 The diagram shown is a flowchart illustrating the second generator set speed control method provided in this application embodiment;

[0040] Figure 8 The diagram shown is a flowchart of step S700 in the second generator set speed control method provided in this application embodiment;

[0041] Figure 9 The diagram shown is a flowchart of step S701 in the fourth generator set speed control method provided in this application embodiment;

[0042] Figure 10 The diagram shown is a structural schematic of a generator set or energy storage device provided in an embodiment of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0045] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0046] It should be understood that, in order to clearly describe the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish the same or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0047] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0048] The inventors of this application have discovered that when a power frequency generator set supplies power to a load, the generator typically operates at a fixed frequency (also known as the rated frequency, where the engine speed is at its rated speed), such as 50Hz or 60Hz, thereby outputting AC power that meets the load requirements. However, when the generator set operates at its rated speed, the output usually stabilizes at the rated power. In reality, the generator set can operate at a power level slightly lower than its rated power. Maintaining the rated power for extended periods results in relatively high noise levels, while in many work scenarios, users require generator sets with lower noise levels. Therefore, embodiments of this application provide a generator set speed control method to adjust the generator set speed to adapt to different scenarios, resulting in lower noise during operation.

[0049] It is understandable that power frequency can refer to the operating frequency of a generator set when its rated output is AC power that conforms to the power grid frequency, that is, the AC power frequency of the local power grid, such as 50Hz or 60Hz.

[0050] See Figure 1 , Figure 1 The diagram shows the application environment of the generator set speed control method provided in this embodiment. Figure 1 As shown, the generator set 100 includes a generator 110, an engine 120, a controller 130, a first AC (Alternating Current) output interface 140, and a first DC (Direct Current) output interface 150. The energy storage device 200 includes an AC input interface 210, a second AC output interface 220, a DC input interface 230, and a second DC output interface 240.

[0051] In generator set 100, engine 120 converts the chemical energy of fuel combustion into mechanical kinetic energy, and generator 110 converts the mechanical energy output from engine 120 into electrical energy output. Controller 130 can be connected to both generator 110 and engine 120, and controller 130 can adjust the speeds of generator 110 and engine 120. Generator 110 is connected to engine 120, and the output port of generator 110 can be connected to a first AC output port 140 and a first DC output port 150, respectively.

[0052] The AC input interface 210 in the energy storage device is connected to the first AC output interface 140, and the second AC output interface 220 is connected to the first DC output interface 150. The second AC output interface 220 and the second DC output interface 240 can be used to connect to external load devices.

[0053] Furthermore, the energy storage device 200 may include a voltage conversion circuit, such as a connected bidirectional inverter circuit and a step-up / step-down circuit. For example, the bidirectional inverter circuit can convert direct current (DC) to alternating current (AC) or vice versa. The step-up / step-down circuit is used to regulate the DC input of the energy storage device's DC input interface, or to regulate the DC output of the bidirectional inverter circuit. It is understood that the voltage conversion circuit can also perform AC-AC conversion on the AC input from the generator set, for example, frequency conversion of the AC input from the generator to output AC power that meets the required industrial frequency specifications.

[0054] In some embodiments, when the generator set 100 is connected to the energy storage device 200, the energy storage device 200 can determine the power it can receive and generate a feedback signal as a first signal based on the power it can receive, and send the first signal to the generator set 100. The generator set 100 determines the first power requested by the energy storage device 200 based on the feedback signal.

[0055] Please refer to Figure 2 , Figure 2 The diagram shown is a flowchart illustrating a generator set speed control method provided in an embodiment of this application. This generator set speed control method can be implemented by... Figure 1 The generator set shown is implemented, for example, by a controller for the generator set, or by a separate controller. In this embodiment, the generator set is communicatively connected to an energy storage device, and the generator set speed control method includes steps S100-S300.

[0056] Step S100: Receive a first signal sent by the energy storage device, the first signal including a first power request from the energy storage device.

[0057] When a generator set connects to the AC input port of an energy storage device via its AC output port, in addition to outputting electrical energy to the energy storage device, the generator set and the energy storage device simultaneously communicate. The communication method can be Power Line Communication (PLC) or other communication methods, such as CAN (Controller Area Network) bus communication, wireless communication, etc. Thus, when the generator set and the energy storage device are connected, the energy storage device can send a first signal back to the generator set.

[0058] It is understandable that if the generator communicates with the energy storage device via power lines, both the energy storage device and the generator are equipped with PLC communication modules. Conversely, if the generator communicates wirelessly with the energy storage device, both the generator and the energy storage device are equipped with wireless communication modules.

[0059] It's understandable that, since the voltage conversion circuit inside the energy storage device can regulate the input of the generator set, the AC input that the energy storage device can receive doesn't have to be at the power frequency. Furthermore, the energy storage device also contains energy storage units such as batteries. When the energy storage device has no output requirement, the generator set's input is actually to charge the energy storage units, so the requirements for the generator set's input frequency and power are not high. When a load is connected to the energy storage device, i.e., there is an output requirement, due to the presence of the energy storage units, the energy storage device can also receive a wider range of power inputs through the supplementary function of the energy storage units. Therefore, when the generator set is connected to the energy storage device and outputs power to the energy storage device, its output power can fluctuate within a wide range, and the frequency of the output AC power does not need to be fixed at the power frequency. In this case, the generator set can adaptively adjust its speed to reduce noise.

[0060] Step S200: When the first power is less than the rated power of the generator set, determine the first speed based on the first power; the first speed is less than the rated speed of the generator set.

[0061] When the initial power is less than the rated power, it indicates that the energy storage device does not require the generator set to operate at its rated speed continuously to meet the power generation demands of the generator set. Therefore, it is safe and acceptable for the generator set to adjust its speed based on the initial power, and thus the generator set can determine its initial speed based on the initial power. Since the initial power is less than the rated power, the initial speed of the generator set is also less than its rated speed, thereby adaptively reducing the noise generated by the generator set.

[0062] It should be emphasized that the embodiments of this application can reduce the speed of the generator set, but the reduced initial speed will not damage the generator's operating condition. At the same time, reducing the generator set's speed can also adaptively reduce the noise generated by the generator set during operation.

[0063] Step S300: Adjust the generator set speed to the first speed.

[0064] After determining a first speed lower than the rated speed based on the first power output, the controller adjusts the generator set's speed to the required engine speed, that is, adjusts the generator set's speed to the first speed. At this time, the AC power output by the generator set can be accepted by the energy storage device. Simultaneously, the generator set can operate at a first speed lower than the rated speed, meeting load requirements while adaptively reducing noise.

[0065] The generator set speed control method provided in the above embodiments of this application determines the first power that the energy storage device can accept by receiving a first signal sent by the energy storage device, and adjusts the speed of the generator set according to the first power so that the generator set operates at a first speed lower than the rated speed, thereby adaptively reducing noise when the generator set load is the energy storage device.

[0066] In some embodiments, the first power includes a preset power range, and before determining the first speed based on the first power, the control method includes: determining that the first power is less than the rated power of the generator set when the rated power of the generator set is greater than the minimum value of the preset power range.

[0067] The endpoint values ​​of the preset power range can include the preset minimum power value and the preset maximum power value, respectively; when the rated power is greater than the preset minimum power value, it can be determined that the first power is less than the rated power.

[0068] It is worth mentioning that the preset power range is determined based on the magnitude of the first power. If the magnitude of the first power changes, the preset power range will also change accordingly.

[0069] Specifically, the preset power range can be [first power value - first threshold, first power value + second threshold]; where the first threshold and the second threshold can be set according to the actual situation, and they can be the same or different.

[0070] Furthermore, in some embodiments, see Figure 3 As shown, Figure 3 The diagram shows a flowchart of step S200 in the generator set speed control method provided in this application embodiment. Step S200 includes steps S201-S202.

[0071] Step S201: When the first power is less than the rated power of the generator set, determine the target output power of the generator set according to the lowest value of the preset power range.

[0072] In one embodiment, the first power includes a preset power range, and the two endpoints of the preset power range are the preset minimum power value and the preset maximum power value, respectively.

[0073] It can be understood that as long as any power value in the preset power range is less than the rated power of the generator set, it can be considered that the first power is less than the rated power of the generator set. Therefore, the first power being less than the rated power of the generator set includes the following situations:

[0074] Case 1: The preset minimum power is less than the rated power, and the preset maximum power is greater than the rated power.

[0075] Case 2: The preset maximum power is less than the rated power.

[0076] The higher the generator set's output power, the greater the noise. Therefore, in both scenario 1 and scenario 2, the lowest value within a preset power range is selected to determine the generator set's target output power in this embodiment. This ensures that the generator's output power is lower than its rated power. When the generator set's output power is lower than its rated power, its rotational speed is also lower than its rated speed, thereby achieving an adaptive reduction in noise.

[0077] It is understood that in other embodiments, a non-minimum value can also be selected as the target output power. For example, in case 2, if the preset maximum power value is less than the rated power, then any value in the preset power range is less than the rated power. In this case, selecting any value can achieve the effect of reducing noise, and any value in this power range can be selected as the target output power according to the user's actual needs.

[0078] Step S202: Determine the first rotational speed based on the target output power.

[0079] Once the target output power of the generator set is determined based on the lowest value of the preset power range, the generator set can adjust its own speed according to the target output power to obtain the first speed.

[0080] Because the target output power will not exceed the rated power, the generator set speed will also not exceed the rated speed. At this time, the first speed of the generator set is also less than the rated speed of the generator set, thereby adaptively reducing the noise generated by the generator set operation.

[0081] In some embodiments, step S202 includes: determining the speed corresponding to the target output power as the first speed based on a preset mapping relationship between the output power and speed of the generator set.

[0082] See Figure 4 As shown, Figure 4The diagram shown illustrates the relationship between rotational speed and power mapping provided in an embodiment of this application. Based on this mapping, a mapping relationship between output power and rotational speed can be pre-stored within the generator set, for example, through programming or other means. Figure 4 As shown, when the engine speed is 3 rpm / min, the output power is 3 kW; when the engine speed is 6 rpm / min, the output power is 6 kW. Thus, once the target output power is determined, the generator set's controller can determine the first speed corresponding to the target output power based on this mapping relationship.

[0083] In some embodiments, see Figure 5 As shown, Figure 5 The diagram shown is a flowchart of step S201 in the first generator set speed control method provided in this application embodiment; the first signal may also include a first frequency range, and the target output power of the generator set is determined according to the lowest value of the preset power range, including steps S2012-S2015.

[0084] Step S2012: Determine the first output power of the generator set based on the lowest value of the preset power range.

[0085] By determining the first output power of the generator set by the lowest value of the preset power range, the generator set speed can be reduced to the maximum extent, thereby reducing noise.

[0086] Step S2013: Based on the preset mapping relationship between the output power and speed of the generator set, determine the second speed corresponding to the first output power.

[0087] As mentioned earlier, the generator set can determine the output power based on the mapping relationship between output power and speed, and then determine the second speed based on the same mapping relationship. For example, it can be based on... Figure 4 The mapping relationship shown determines the corresponding rotational speed based on the output power.

[0088] Step S2014: Calculate the corresponding first output frequency of the generator set based on the second rotational speed.

[0089] For a generator set, its rotational speed and frequency have the following relationship: n = 60f / P. Assuming the generator has 1 pole pair, when the generator's output frequency f = 50Hz, n = 3000 rpm. When the generator's output frequency f = 60Hz, n = 3600 rpm. Therefore, knowing the second rotational speed, the corresponding first output frequency can be calculated from it.

[0090] Step S2015: When the first output frequency falls within the first frequency range, determine the first output power as the target output power.

[0091] The first frequency range can be between 40Hz and 70Hz. When the first output frequency falls within the first frequency range, it means that the generator set is safe to operate at the first output frequency, so the first output power can be used as the target output power.

[0092] Furthermore, in one embodiment of this application, the first power fed back by the energy storage device and the first frequency range for receiving AC input can be determined by the input parameters of the energy storage device or set by the user. For example, when the generator set is too noisy, the user can connect to the energy storage device through the corresponding APP and set the first power input and the first frequency range for receiving AC input on the APP to adjust the generator set's engine speed.

[0093] In some embodiments, the generator set speed control method further includes step S400.

[0094] Step S400: When the first power is greater than or equal to the rated power of the generator set, maintain the speed of the generator set at the rated speed.

[0095] Generators are manufactured with specified load conditions, such as an operating output power range not exceeding 10% of the rated value. Prolonged operation exceeding 10% of the rated value may affect the generator set's lifespan. When the initial power is greater than or equal to the rated power, it indicates that the energy storage device requires significant power. If the generator set supplies this initial power to the energy storage device, it may damage the generator set itself. Therefore, the generator set can limit its initial output power and initial output frequency within a certain range to maintain the generator set's rated speed. This range can be set according to actual conditions. If the generator set's initial output power or initial output frequency exceeds this range, the output should be cut off.

[0096] In some embodiments, the generator set speed control method further includes step S500.

[0097] Step S500: When the first power is greater than or equal to the rated power of the generator set, send first feedback information to the energy storage device; the first feedback information is used to instruct the energy storage device to reduce the first power.

[0098] When the initial power is greater than or equal to the rated power, it indicates that the energy storage device requires a large amount of power, exceeding the safe operating range of the generator set. At this point, the generator set can send a first feedback message to the energy storage device, instructing it to reduce its required power. Then, the energy storage device reduces its required initial power according to the first feedback message, making the initial power less than or equal to the rated power of the generator set; this ensures that the generator set operates in a safe state.

[0099] In summary, the energy storage device feeds back its required initial power and frequency range to the generator set. The generator set adjusts its speed according to the target output power, thereby adjusting its speed to meet the required initial speed and enabling the generator set to output AC power to the energy storage device. When the power required by the energy storage device is less than the rated power of the generator set, the initial signal fed back by the energy storage device can adjust the generator set's output power to be less than the rated power, avoiding the generator set from supplying power at the rated power for a long time, which would cause energy waste. When the generator set's output power is less than the rated power, the generator set's speed is also less than the rated speed, thus adaptively reducing noise when the generator set load is the energy storage device.

[0100] On the other hand, in some embodiments, see Figure 6 As shown, Figure 6 The diagram shown illustrates an application environment for another generator set speed control method provided in this embodiment. It is understood that... Figure 6 The generator set 100 and energy storage device 200 in the middle Figure 1 The same as in. And Figure 6 The illustration shows only one load 300, but this does not mean that the energy storage device 200 is only connected to one load 300. In different application scenarios, the energy storage device can be equipped with multiple AC output ports or multiple loads 300 can be connected. The load 300 can be connected to the second AC output port 220 of the energy storage device 200, or to the second DC output port 240 of the energy storage device 200. When the energy storage device 200 is simultaneously connected to the generator set 100 and the load 300 (connected to the AC output port), the energy storage device 200 can be charged by the generator set 100 and output AC power that meets the requirements of the load 300.

[0101] In some embodiments, see Figure 7 As shown, Figure 7 The diagram shown is a flowchart illustrating a second generator set speed control method provided in this application embodiment. This generator set speed control method can be implemented by... Figure 6 The energy storage device shown is implemented, for example, by a controller of the energy storage device, or by a separate controller. In this embodiment, the generator set speed control method includes steps S600-S700.

[0102] Step S600: When the generator set is detected to be connected, the first power is determined based on the power information of the energy storage device and the load connection information; the first power is the input power that the energy storage device can receive.

[0103] In some embodiments, when the generator set is communicatively connected to the energy storage device, the energy storage device can detect the generator set's intervention. Load access information may include information such as power, voltage, current, and type of the load under its operating conditions.

[0104] Step S700: Generate a first signal based on the first power and send the first signal to the generator set; wherein, the first signal is used to instruct the generator set to adjust the speed based on the first power.

[0105] Under normal circumstances, when a generator set operates at its rated speed, its output power is usually stable at the rated power. If the power required by the load is less than the generator's output power, energy is wasted, and engine noise is also higher. In the above solution, the energy storage device can include a bidirectional inverter circuit and a battery. When receiving power, the bidirectional inverter circuit converts the input AC power to DC power to charge the energy storage battery and store energy. When discharging, the bidirectional inverter circuit converts the DC power output from the energy storage battery back to AC power to supply power to the load. This adaptively reduces the generator's output power while ensuring the load has sufficient power to operate.

[0106] Further, see Figure 8 As shown, Figure 8 The diagram shown is a flowchart of step S700 in the second generator set speed control method provided in this application embodiment; when the energy storage device is connected to a load, determining the first power according to the energy storage device's power information or load access information includes steps S701-S702.

[0107] Step S701: Determine the power consumption rate of the load based on the power information of the energy storage device or the load access information.

[0108] Different load types can be identified by load access information. Different types of loads output different power when working, so different types of loads consume power at different rates.

[0109] Furthermore, to facilitate understanding of how the power consumption rate of the load is determined, in some embodiments, see [reference needed]. Figure 9 As shown, Figure 9 The diagram shown is a flowchart of step S701 in the fourth generator set speed control method provided in this application embodiment; step S701 includes steps S7011-S7013.

[0110] Step S7011: When the energy storage device is not charging and is supplying power to the load, obtain the first energy level of the energy storage device at the first moment. Step S7012: Obtain the second energy level of the energy storage device at the second moment. Step S7013: Calculate the power consumption rate of the load using the difference between the first and second energy levels and the time difference between the first and second moments.

[0111] In some embodiments, determining the load's power consumption rate can also be achieved by: determining the load's rated power based on the load access information, ensuring the load operates at its rated power, and statistically analyzing the load's output power over a preset time period to obtain the load's power consumption rate.

[0112] Step S702: Calculate the first power of the energy storage device based on the energy consumption rate of the energy storage device and the load; wherein, the first power includes the minimum charging speed for maintaining the load at the rated power.

[0113] After determining the energy storage device's remaining power (i.e., the energy storage device's own remaining power) and the rate of power consumption, the energy storage device can calculate the required first power based on its remaining power and the rate of power consumption. Under the first power, the energy storage device can charge while simultaneously supplying power to the load.

[0114] Preferably, in the process of calculating the required first power, it can be ensured that the first power meets the following conditions: when the generator set is operating at the first power, the rate at which the generator set supplies power to the energy storage device (i.e., the charging rate of the energy storage device, which is an inherent function of the energy storage device and is known) is greater than or equal to the rate of power consumption, and the energy storage device is fully charged within a preset time period. This ensures that the energy storage device's power is not completely consumed by the load and can be fully charged within the required time.

[0115] In some implementations, the generator set can charge the energy storage device while simultaneously using the energy storage device to supply power to the load. This can appropriately reduce the output power of the generator set. When the output power of the generator set is reduced, the speed of the generator set can also be reduced, thereby reducing the noise generated by the generator set during operation.

[0116] In summary, when an energy storage device is connected to a load, the device can determine the rate of power consumption based on the load connection information. It then determines the initial power output based on the device's power information and the rate of power consumption, and sends this initial power to the generator set to adjust the generator's speed. In this state, the energy storage device can simultaneously charge and utilize its stored power to supply power to the load, thereby reducing the generator set's output power. When the generator set's output power decreases, its speed also decreases, thus reducing the noise generated during generator operation.

[0117] In some embodiments, the energy storage device may also be disconnected from the load. See also Figure 1 As shown, in this case, the power consumption rate of the load is also equivalent to 0. Therefore, the embodiments of this application also include:

[0118] Based on the power information of the energy storage device, a first power is determined; the first power is the input power that the energy storage device can receive; a first signal is generated based on the first power and sent to the generator set; wherein, the first signal is used to instruct the generator set to adjust its speed according to the first power.

[0119] When the energy storage device is not connected to a load, it can not only charge the device, but also send back a first signal to adjust the speed of the generator set, thereby reducing the noise generated by the generator set.

[0120] On the other hand, this application also provides a generator set, which includes an engine, a generator and a controller. The controller is connected to the generator and the engine set, and the generator set is communicatively connected to an energy storage device. The controller is used to execute the generator set speed control method as described in the above embodiment.

[0121] On the other hand, this application also provides an energy storage power generation system, including a generator set, an energy storage device, and a controller. The controller is communicatively connected to the generator set and the energy storage device, and is used to execute the steps of the generator set speed control method as described in the above embodiment.

[0122] See Figure 10 As shown, Figure 10 The diagram shows a schematic representation of a generator set or energy storage device according to an embodiment of this application. Taking a generator set as an example, the generator set 50 may include a processor (CPU, GPU, FPGA, etc.) 501, which can execute some or all of the processing described in the above figures according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage portion 508 into a random access memory (RAM) 503. The RAM 503 also stores various programs and data required for system operation. The processor 501, ROM 502, and RAM 503 are interconnected via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0123] The following components are connected to I / O interface 505: an input section 506 including a keyboard, mouse, etc.; an output section 507 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN card, modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to I / O interface 505 as needed. A removable medium 511, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 510 as needed so that computer programs read from it can be installed into storage section 508 as needed.

[0124] In particular, according to embodiments of this application, the methods described above with reference to the accompanying drawings can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program tangibly embodied on a readable medium thereof, the computer program containing program code for performing the methods in the drawings. In such embodiments, the computer program can be downloaded and installed from a network via communication section 509, and / or installed from removable medium 511.

[0125] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0126] The units or modules described in the embodiments of this application can be implemented in software or hardware. The described units or modules can also be located in a processor, and the names of these units or modules do not necessarily constitute a limitation on the unit or module itself.

[0127] In another aspect, this application also provides a computer-readable storage medium, which may be the computer-readable storage medium included in the projection device described above; or it may be a standalone computer-readable storage medium not assembled into the device. The computer-readable storage medium stores one or more programs, which are used by one or more processors to execute the generator set speed control method described in this application.

[0128] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A generator set speed control method, characterized in that, The generator set is communicatively connected to the energy storage device, and the method includes: Receive a first signal sent by the energy storage device, the first signal including a first power request from the energy storage device; When the first power is less than the rated power of the generator set, the first speed is determined based on the first power; the first speed is less than the rated speed of the generator set. Adjust the generator set speed to the first speed; The first power includes a preset power range, and when the first power is less than the rated power of the generator set, determining the first speed based on the first power includes: When the first power is less than the rated power of the generator set, the target output power of the generator set is determined according to the lowest value of the preset power range; The first rotational speed is determined based on the target output power; The first signal further includes a first frequency range, and the step of determining the target output power of the generator set based on the lowest value of the preset power range includes: The first output power of the generator set is determined based on the lowest value of the preset power range; Based on a preset mapping relationship between the output power and speed of the generator set, the second speed corresponding to the first output power is determined; Calculate the corresponding first output frequency of the generator set based on the second rotational speed; When the first output frequency falls within the first frequency range, the first output power is determined to be the target output power.

2. The generator set speed control method according to claim 1, characterized in that, The first power includes a preset power range. Before determining the first rotational speed based on the first power, the method includes: When the rated power of the generator set is greater than the lowest value of the preset power range, the first power is determined to be less than the rated power of the generator set.

3. The generator set speed control method according to claim 1, characterized in that, Determining the first rotational speed based on the target output power includes: Based on a preset mapping relationship between the output power and rotational speed of the generator set, the rotational speed corresponding to the target output power is determined as the first rotational speed.

4. The generator set speed control method according to claim 1, characterized in that, The method further includes: When the first power is greater than or equal to the rated power of the generator set, the speed of the generator set is maintained at the rated speed.

5. The generator set speed control method according to any one of claims 1-4, characterized in that, The method further includes: When the first power is greater than or equal to the rated power of the generator set, a first feedback message is sent to the energy storage device; the first feedback message is used to instruct the energy storage device to reduce the first power.

6. A generator set speed control method, characterized in that, Applied to an energy storage device, the energy storage device being communicatively connected to a generator set performing the method according to any one of claims 1-5, the method comprising: When the generator set is detected to be connected, a first power is determined based on the power information or load connection information of the energy storage device; the first power is the input power that the energy storage device can receive. A first signal is generated based on the first power, and the first signal is sent to the generator set; wherein the first signal is used to instruct the generator set to adjust its speed based on the first power.

7. A generator set, characterized in that, The generator set includes a generator and a controller, the controller being communicatively connected to the generator and the energy storage device, and the controller being used to execute the generator set speed control method as described in any one of claims 1-5.

8. An energy storage power generation system, characterized in that, The device includes a generator set, an energy storage device, and a controller. The controller is communicatively connected to the generator set and the energy storage device. The controller is used to execute the steps of the generator set speed control method as described in any one of claims 1-5.

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