Temperature control method and device, gas generator set and power supply equipment

Abstract

The invention discloses a temperature control method and device, a gas generator set and power supply equipment, the method is suitable for the multi-machine parallel gas generator set, and the gas generator set comprises a gas engine and a generator; the temperature control method comprises the steps that the temperature of mixed gas in an intake manifold of the gas engine after intercooling is obtained; and when the temperature is greater than or equal to the preset temperature alarm value, activating a power limit alarm program of the gas generator set, and meanwhile, controlling the opening degree of a throttle valve to be reduced until the temperature is less than the preset temperature alarm value. According to the embodiment, the gas engine can be protected, and damage to the gas engine caused by sudden stop in a high-power section is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to a temperature control method and device, a gas generator set, and power supply equipment. Background Art

[0002] Existing large-bore gas generator sets have limited protection against high mixed air temperature (MAT) after the intercooler. Currently, high MAT simply triggers an alarm and shutdown in the control system. This high-power emergency shutdown can be particularly damaging to the engine, shortening the life of the supercharger, causing rupture and leakage in the high-temperature water pipe, and straining the cylinder liner.

[0003] After gas engines are assembled into a unit, they typically operate continuously, either in an islanded configuration or connected to the utility grid. In both operating conditions, the engine output power is set by the power generation management controller. For users, adding or removing load on the generator set is a common operation. The post-intercooler MAT of a gas generator set is a very important variable. Extensive bench test data indicates that, within specific load ranges, excessively high MAT can trigger engine knock, causing irreversible damage. Current control systems generate an alarm when MAT exceeds the alarm threshold; they initiate an emergency shutdown when MAT exceeds the shutdown threshold. Users often operate gas generator sets at high power levels in the hope of generating high economic returns. At user sites, abnormally high external circulation low-temperature water temperatures, often caused by external factors such as plate erosion and water shortage in the horizontal heat exchanger, trigger an emergency shutdown of the engine. Reviewing historical alarms afterwards often reveals fault records of high MAT and engine knock. Existing technologies simply issue alarms and emergency shutdowns without proactively reducing power, resulting in drawbacks and poor engine protection. Summary of the Invention

[0004] The present invention provides a temperature control method, device, gas generator set and power supply equipment, which can protect the gas engine and avoid damage to the gas engine caused by emergency stop in the high power section.

[0005] In a first aspect, an embodiment of the present invention provides a temperature control method applicable to a gas generator set having multiple units connected in parallel, the gas generator set comprising a gas engine and a generator;

[0006] The temperature control method comprises:

[0007] obtaining a temperature of a mixed gas in an intake manifold of a gas engine after intercooling;

[0008] When the temperature is greater than or equal to a preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is controlled to decrease until the temperature is less than the preset temperature alarm value.

[0009] Optionally, when the temperature is greater than or equal to a preset temperature alarm value, activating a power limit alarm program of the gas generator set and controlling the throttle opening to decrease until the temperature is less than the preset temperature alarm value includes:

[0010] When it is detected that the temperature is greater than or equal to a preset temperature alarm value, controlling the throttle opening to decrease by a first preset value and activating a power limit alarm program of the gas generator set;

[0011] After controlling the throttle opening to decrease by a first preset value, if the temperature is still greater than or equal to the preset temperature alarm value, the throttle opening is again controlled to decrease by a second preset value, while keeping the power limit alarm program of the gas generator set activated until the temperature is less than the preset temperature alarm value.

[0012] Optionally, activating the power limit alarm procedure of the gas generator set includes:

[0013] Manually confirm activation of the power limit alarm program of the gas generator set on the control panel side of the gas generator set.

[0014] Optionally, when the temperature is greater than or equal to a preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is controlled to decrease until the temperature is less than the preset temperature alarm value, the method further includes:

[0015] When the temperature is lower than a preset temperature alarm value, the power limiting alarm program for controlling the gas generator set remains activated.

[0016] Optionally, after controlling the power limit alarm program of the gas generator set to remain activated when the temperature is lower than a preset temperature alarm value, the method further includes:

[0017] Reset the power limit alarm program of the gas generator set.

[0018] In a second aspect, an embodiment of the present invention further provides a temperature control device, comprising:

[0019] A temperature acquisition module, used to acquire the temperature of the mixed gas in the intake manifold of the gas engine after intercooling;

[0020] The alarm activation and throttle opening control module is used to activate the power limit alarm program of the gas generator set when the temperature obtained by the temperature acquisition module is greater than or equal to the preset temperature alarm value, and at the same time control the throttle opening to decrease until the temperature is less than the preset temperature alarm value.

[0021] Optionally, the alarm activation and throttle opening control module includes: an alarm activation unit and a throttle opening control unit;

[0022] The throttle opening control unit is used to control the throttle opening to decrease by a first preset value when detecting that the temperature acquired by the temperature acquisition module is greater than or equal to a preset temperature alarm value, and the alarm activation unit is used to simultaneously activate the power limit alarm program of the gas generator set;

[0023] The throttle opening control unit is also used to control the throttle opening to decrease by a second preset value again if the temperature is still greater than or equal to the preset temperature alarm value after controlling the throttle opening to decrease by a first preset value. The alarm activation unit is also used to simultaneously keep activating the power limitation alarm program of the gas generator set until the temperature is lower than the preset temperature alarm value.

[0024] Optionally, the alarm activation and throttle opening control module is further configured to control the power limit alarm program of the gas generator set to remain activated when the temperature is less than a preset temperature alarm value.

[0025] In a third aspect, an embodiment of the present invention further provides a gas generator set, which uses the temperature control method as described in the first aspect to achieve temperature control;

[0026] The gas generator set includes a gas engine and a generator;

[0027] The gas generator set is operated in a mode of multiple units being islanded and connected to the mains power grid.

[0028] In a fourth aspect, an embodiment of the present invention further provides a power supply device, comprising the gas generator set described in the third aspect.

[0029] Embodiments of the present invention provide a temperature control method, device, gas generator set, and power supply equipment. When the temperature of the intercooled gas mixture is greater than or equal to a preset temperature alarm value, the gas generator set's power limit alarm program is activated, and the throttle opening is simultaneously controlled to decrease. This allows the gas generator set to actively reduce its load when the intercooled gas mixture temperature is high, until the measured intercooled gas temperature falls below the preset temperature alarm value. This active load reduction function, introduced when the intercooled gas mixture temperature is high, protects the gas engine and prevents damage to the gas engine caused by an emergency stop during high power operation.

[0030] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a flow chart of a temperature control method provided by an embodiment of the present invention;

[0033] Figure 2 is a flow chart of another temperature control method provided by an embodiment of the present invention;

[0034] Figure 3 1 is a schematic structural diagram of a temperature control device provided by an embodiment of the present invention;

[0035] Figure 4 It is a structural schematic diagram of another temperature control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Figure 1 This is a flow chart of a temperature control method provided by an embodiment of the present invention. This embodiment is applicable to a gas generator set with multiple machines connected in parallel, and the gas generator set includes a gas engine and a generator; the method can be executed by a temperature control device, and the temperature control device can be implemented in the form of hardware and / or software.

[0039] refer to Figure 1 , the temperature control method comprises the following steps:

[0040] S110: Obtaining the temperature of the mixed gas in the intake manifold of the gas engine after intercooling.

[0041] The gas engine of the present invention may be a gas engine that uses natural gas, biogas, oilfield associated gas and other combustible gases as fuel.

[0042] Specifically, by acquiring the temperature detected by the temperature sensor installed on the intercooler, the temperature of the mixed gas in the intake manifold of the gas engine after intercooling can be acquired.

[0043] S120: When the temperature is greater than or equal to the preset temperature alarm value, activate the power limit alarm program of the gas generator set and control the throttle opening to decrease until the temperature is lower than the preset temperature alarm value.

[0044] Among them, the preset temperature alarm value can be freely selected according to actual conditions.

[0045] It is understood that when the intercooled mixed gas temperature is greater than or equal to the preset temperature alarm value, an active throttle closing action is performed to achieve active power reduction, while simultaneously activating the gas generator set's power limit alarm program. If, after actively closing the throttle, the intercooled mixed gas temperature is still detected to be greater than or equal to the preset temperature alarm value, another active throttle closing action may be performed to further reduce the unit's power while maintaining the activation of the gas generator set's power limit alarm program until the intercooled mixed gas temperature falls below the preset temperature alarm value.

[0046] It should be noted that the power limit alarm program of the gas generator set mainly monitors the unit operating parameters in real time, combines preset safety thresholds and control logic, and provides early warning and limitation of abnormal power status.

[0047] In this embodiment of the present invention, when the temperature of the intercooled mixed gas exceeds or equals a preset temperature alarm value, the power limit alarm program of the gas generator set is activated and the throttle opening is simultaneously controlled to decrease. This allows the gas generator set to actively reduce the load when the intercooled mixed gas temperature is high, until the measured intercooled mixed gas temperature falls below the preset temperature alarm value. This active load reduction function protects the gas engine and prevents damage to the gas engine caused by an emergency stop during high power operation.

[0048] Figure 2 This is a flow chart of another temperature control method provided by an embodiment of the present invention, refer to Figure 2 , the method comprises the following steps:

[0049] S210: Obtain the temperature of the mixed gas in the intake manifold of the gas engine after intercooling.

[0050] S220: When it is detected that the temperature is greater than or equal to the preset temperature alarm value, the throttle opening is controlled to decrease by a first preset value, and the power limit alarm program of the gas generator set is activated at the same time.

[0051] S230. After the throttle opening is controlled to decrease by the first preset value, if the temperature is still greater than or equal to the preset temperature alarm value, the throttle opening is controlled to decrease by the second preset value again, while keeping the power limit alarm program of the gas generator set activated until the temperature is less than the preset temperature alarm value.

[0052] The first and second preset values ​​can be freely set. When setting these values, the stability of parallel operation of multiple units should be taken into consideration to prevent disconnection failures. The magnitude of each throttle opening reduction should not be too large. The first and second preset values ​​can be equal or unequal.

[0053] Optionally, based on the above embodiment, step S120 may include steps S220 to S230.

[0054] In this embodiment of the present invention, when the temperature of the intercooled mixed gas is greater than or equal to a preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is simultaneously controlled to decrease. This allows for active load reduction when the mixed gas temperature after intercooling is high within the gas generator set. If the high mixed gas temperature after intercooling persists after active load reduction, the throttle opening is further controlled to decrease, thereby further reducing power until the measured temperature of the mixed gas after intercooling falls below the preset temperature alarm value. The introduction of this active load reduction function when the mixed gas temperature after intercooling is high protects the gas engine and prevents damage to the gas engine caused by an emergency stop during high power operation.

[0055] Optionally, based on the above embodiment, activating the power limit alarm program of the gas generator set includes: manually confirming the activation of the power limit alarm program of the gas generator set on the control panel side of the gas generator set.

[0056] S240: When the temperature is lower than the preset temperature alarm value, the power limit alarm program of the control gas generator set remains activated.

[0057] It is understandable that when the temperature is lower than the preset temperature alarm value, the power limit alarm program controlling the gas generator set remains activated, and the ECU will continue to issue a power limit alarm to remind the user to check the operation of the unit's external circulation low-temperature water.

[0058] Optionally, based on the above embodiment, after step S120, the following step may be included: step S240.

[0059] S250: Reset the power limit alarm program of the gas generator set.

[0060] It should be noted that the "limited power" refers to the power of the gas generator set when it is in the power-limited state, the "actual power" refers to the actual power of the gas generator set during operation, and the "target power" refers to the target power value of the gas generator set, as transmitted by the power generation management module in a CAN message format. When the power limit alarm program for the gas generator set is not activated, the actual power of the gas generator set is equal to the target power. When the power limit alarm program for the gas generator set is activated, the actual power of the gas generator set is equal to the "limited power."

[0061] It is understood that when the temperature is lower than the preset temperature alarm value, but the power limit alarm program of the gas generator set remains activated, the gas generator set will continue to operate in a power-limited state. The gas generator set will not resume operation at the power setting of the power management controller until the operator manually resets the power limit alarm program of the gas generator set.

[0062] Optionally, based on the above embodiment, after step S240, step S250 is further included.

[0063] In summary, in this embodiment of the present invention, when the temperature of the intercooled mixed gas is greater than or equal to a preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is simultaneously controlled to decrease. This allows for active load reduction when the mixed gas temperature after intercooling is high within the gas generator set. If the high mixed gas temperature after intercooling persists after active load reduction, the throttle opening is further controlled to decrease, thereby further reducing power until the measured temperature of the mixed gas after intercooling falls below the preset temperature alarm value. The introduction of this active load reduction function when the mixed gas temperature after intercooling is high protects the gas engine and prevents damage to the gas engine caused by an emergency stop during high power operation.

[0064] Figure 3 This is a schematic diagram of the structure of a temperature control device provided by an embodiment of the present invention, with reference to Figure 3 The device includes: a temperature acquisition module 310 and an alarm activation and throttle opening control module 320.

[0065] In an embodiment of the present invention, the temperature acquisition module 310 is used to obtain the temperature of the mixed gas in the intake manifold of the gas engine after cooling; the alarm activation and throttle opening control module 320 is used to activate the power limit alarm program of the gas generator set when the temperature obtained by the temperature acquisition module is greater than or equal to the preset temperature alarm value, and at the same time control the throttle opening to decrease until the temperature is less than the preset temperature alarm value.

[0066] Figure 4 This is a schematic diagram of the structure of another temperature control device provided by an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 4 The alarm activation and throttle opening control module 320 includes: an alarm activation unit 321 and a throttle opening control unit 322 .

[0067] In an embodiment of the present invention, the throttle opening control unit 322 is used to control the throttle opening to reduce a first preset value when it is detected that the temperature obtained by the temperature acquisition module is greater than or equal to the preset temperature alarm value, and the alarm activation unit 321 is used to simultaneously activate the power limitation alarm program of the gas generator set; the throttle opening control unit 322 is also used to control the throttle opening to reduce a first preset value if the temperature is still greater than or equal to the preset temperature alarm value after controlling the throttle opening to reduce a first preset value, and the alarm activation unit 321 is also used to simultaneously keep activating the power limitation alarm program of the gas generator set until the temperature is lower than the preset temperature alarm value.

[0068] Optionally, based on the above embodiment, the alarm activation and throttle opening control module 320 is further configured to control the power limit alarm program of the gas generator set to remain activated when the temperature is lower than a preset temperature alarm value.

[0069] The temperature control device provided in the embodiment of the present invention can execute the temperature control method provided in any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For the contents not described in detail in the embodiment of the present invention, reference can be made to the temperature control method provided in the above embodiment.

[0070] An embodiment of the present invention also provides a gas generator set, which uses the temperature control method provided in the above embodiment to achieve temperature control; the gas generator set includes a gas engine and a generator; the gas generator set operates in a multi-unit island parallel mode or in a mains power grid mode.

[0071] An embodiment of the present invention further provides a power supply device, comprising the gas generator set provided in the above embodiment.

[0072] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0073] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A temperature control method, characterized in that: Applicable to a gas generator set with multiple units connected in parallel, the gas generator set comprising a gas engine and a generator; The temperature control method comprises: obtaining a temperature of a mixed gas in an intake manifold of a gas engine after intercooling; When the temperature is greater than or equal to a preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is controlled to decrease until the temperature is less than the preset temperature alarm value.

2. The temperature control method according to claim 1, characterized in that: When the temperature is greater than or equal to a preset temperature alarm value, activating the power limit alarm program of the gas generator set and controlling the throttle opening to decrease until the temperature is less than the preset temperature alarm value includes: When it is detected that the temperature is greater than or equal to a preset temperature alarm value, controlling the throttle opening to decrease by a first preset value and activating a power limit alarm program of the gas generator set; After controlling the throttle opening to decrease by a first preset value, if the temperature is still greater than or equal to the preset temperature alarm value, the throttle opening is again controlled to decrease by a second preset value, while keeping the power limit alarm program of the gas generator set activated until the temperature is less than the preset temperature alarm value.

3. The temperature control method according to claim 1, characterized in that: The power limit alarm procedure for activating the gas generator set includes: Manually confirm activation of the power limit alarm program of the gas generator set on the control panel side of the gas generator set.

4. The temperature control method according to claim 3, characterized in that: When the temperature is greater than or equal to the preset temperature alarm value, the power limit alarm program of the gas generator set is activated, and the throttle opening is controlled to decrease until the temperature is less than the preset temperature alarm value, the method further includes: When the temperature is lower than a preset temperature alarm value, the power limiting alarm program for controlling the gas generator set remains activated.

5. The temperature control method according to claim 4, characterized in that: After controlling the power limit alarm program of the gas generator set to remain in an activated state when the temperature is less than a preset temperature alarm value, the method further includes: Reset the power limit alarm program of the gas generator set.

6. A temperature control device, characterized in that: include: A temperature acquisition module, used to acquire the temperature of the mixed gas in the intake manifold of the gas engine after intercooling; The alarm activation and throttle opening control module is used to activate the power limit alarm program of the gas generator set when the temperature obtained by the temperature acquisition module is greater than or equal to the preset temperature alarm value, and at the same time control the throttle opening to decrease until the temperature is less than the preset temperature alarm value.

7. The temperature control device according to claim 6, characterized in that The alarm activation and throttle opening control module includes: an alarm activation unit and a throttle opening control unit; The throttle opening control unit is used to control the throttle opening to decrease by a first preset value when detecting that the temperature acquired by the temperature acquisition module is greater than or equal to a preset temperature alarm value, and the alarm activation unit is used to simultaneously activate the power limit alarm program of the gas generator set; The throttle opening control unit is also used to control the throttle opening to decrease by a second preset value again if the temperature is still greater than or equal to the preset temperature alarm value after controlling the throttle opening to decrease by a first preset value. The alarm activation unit is also used to simultaneously keep activating the power limitation alarm program of the gas generator set until the temperature is lower than the preset temperature alarm value.

8. The temperature control device according to claim 6, characterized in that The alarm activation and throttle opening control module is further configured to control the power limit alarm program of the gas generator set to remain activated when the temperature is less than a preset temperature alarm value.

9. A gas generator set, characterized in that: Temperature control is achieved by using the temperature control method according to any one of claims 1 to 5; The gas generator set includes a gas engine and a generator; The gas generator set is operated in a mode of multiple units being islanded and connected to the mains power grid.

10. A power supply device, characterized in that: Including the gas generator set as described in claim 9.

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