Condensate water system control method for a genset

Abstract

The application relates to the technical field of condensate water system control, and provides a condensate water system control method of a generator set. During the operation of the generator set, a variable-frequency condensate water pump, a main regulating valve of the water level of a deaerator and a secondary regulating valve of the water level of the deaerator are put into an automatic regulating state. The working modes of the variable-frequency condensate water pump, the main regulating valve of the water level of the deaerator and the secondary regulating valve of the water level of the deaerator are adjusted by acquiring the load of the generator set in real time and based on multiple load intervals. On the basis of improving the automation level of the generator set, the economy of the generator set during wide-load operation is improved.

Description

Technical Field

[0001] This application relates to the field of condensate system control technology, and in particular to a method for controlling the condensate system of a generator set. Background Technology

[0002] With the establishment of the national dual-carbon strategy and the implementation of frequency regulation market and electricity market trading, the environmental protection and energy-saving requirements for generator units are becoming increasingly stringent. How to further tap the energy-saving potential of generator units under normal wide-load operation conditions and improve their economic efficiency at full load has become a key focus for power generation companies. Summary of the Invention

[0003] This application provides a method for controlling the condensate system of a generator set and a condensate system for the generator set, which can improve the economy of the generator set when operating at full load.

[0004] In a first aspect, embodiments of this application provide a method for controlling a condensate system of a generator set. The condensate system includes a condenser, a variable frequency condensate pump, a deaerator water level main control valve, a deaerator water level auxiliary control valve, and a deaerator. The method includes:

[0005] Put the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve into automatic adjustment mode.

[0006] The load of the generator set is acquired in real time during the operation of the generator set:

[0007] When the load is in the first load range, the condensate pressure is controlled by the variable frequency condensate pump, the deaerator water level is controlled by the deaerator water level auxiliary regulating valve in a single-impulse regulation mode, and the deaerator water level main regulating valve is kept fully closed.

[0008] When the load increases from the first load range to the second load range, the deaerator water level main control valve is opened and the deaerator water level is controlled by the three-impulse regulation method through the deaerator water level main control valve, and the deaerator water level secondary control valve is closed at a preset rate.

[0009] When the load increases from the second load range to the third load range, the deaerator water level is controlled by the variable frequency condensate pump using a three-impulse regulation method, the condensate pressure is controlled by the main deaerator water level control valve, and the secondary deaerator water level control valve is kept fully closed.

[0010] When the load increases from the third load range to the fourth load range, the deaerator water level auxiliary regulating valve is opened and condensate replenishment is carried out through the deaerator water level auxiliary regulating valve.

[0011] According to an embodiment of this application, a method for controlling the condensate system of a generator set, wherein the condensate replenishment is performed through the deaerator water level auxiliary regulating valve, includes:

[0012] The deaerator water level auxiliary regulating valve adjusts the condensate replenishment amount based on the load, condensate pressure, and deaerator feedwater flow rate.

[0013] According to an embodiment of this application, a condensate system control method for a generator set is provided. When the load is in the first load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, the deaerator water level auxiliary regulating valve is switched to manual adjustment mode, the deaerator water level main regulating valve is opened, and the deaerator water level is controlled by single-impulse regulation through the deaerator water level main regulating valve.

[0014] According to an embodiment of this application, a condensate system control method for a generator set is provided. When the load is in the second load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, the main deaerator water level control valve is switched to manual adjustment mode, the secondary deaerator water level control valve is opened, and the deaerator water level is controlled by the secondary deaerator water level control valve in a single-impulse manner.

[0015] According to an embodiment of this application, a condensate system control method for a generator set is provided. When the load is in the third load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, and the deaerator water level is controlled in a three-impulse manner through the deaerator water level main control valve. If the deaerator water level main control valve is not in automatic adjustment mode, the deaerator water level secondary control valve is opened and the deaerator water level is controlled in a single-impulse manner through the deaerator water level secondary control valve.

[0016] According to an embodiment of this application, a condensate system control method for a generator set is provided. When the load is in the third load range and a fault occurs, the variable frequency condensate pump is kept in automatic adjustment mode, the deaerator water level main control valve is switched to manual adjustment mode, and the deaerator water level is controlled by the variable frequency condensate pump using a three-impulse adjustment method.

[0017] According to an embodiment of this application, a condensate system control method for a generator set is provided. When the load is in the fourth load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode. The deaerator water level is controlled by the deaerator water level main control valve in a three-impulse adjustment mode. The deaerator water level is controlled by the deaerator water level main control valve according to the load. If the deaerator water level main control valve is not in automatic adjustment mode, the deaerator water level is controlled by the deaerator water level main control valve in a single-impulse adjustment mode.

[0018] According to an embodiment of this application, a condensate system control method for a generator set is provided, wherein the first load range is 0% to 25% of the rated capacity of the generator set, the second load range is 25% to 38% of the rated capacity of the generator set, the third load range is 38% to 60% of the rated capacity of the generator set, and the fourth load range is 60% to 100% of the rated capacity of the generator set.

[0019] Secondly, embodiments of this application provide a condensate system for a generator set, the condensate system including a condenser, a variable frequency condensate pump, a deaerator water level main regulating valve, a deaerator water level secondary regulating valve, and a deaerator, the condensate system performing the method provided in any of the embodiments of the first aspect above.

[0020] This embodiment of the application, during generator set operation, puts the variable frequency condensate pump, deaerator water level main control valve, and deaerator water level auxiliary control valve into automatic regulation mode, and acquires the generator set load in real time. Then, it adjusts the operating modes of the variable frequency condensate pump, deaerator water level main control valve, and deaerator water level auxiliary control valve according to load changes. Specifically, when the load is in the first load range, the variable frequency condensate pump controls the condensate pressure, and the deaerator water level is controlled by the deaerator water level auxiliary control valve using a single-impulse regulation method, while keeping the deaerator water level main control valve fully closed. When the load increases from the first load range to the second load range, the deaerator water level main and auxiliary control valves are switched. The process involves several steps: First, the main deaerator level control valve is opened and the deaerator level is controlled using a three-impulse regulation method. The secondary deaerator level control valve is closed at a preset rate. Second, when the load increases from the second load range to the third load range, the deaerator level control is switched from the main deaerator level control valve to the variable frequency condensate pump. This means the deaerator level is controlled using a three-impulse regulation method, while the main deaerator level control valve controls the condensate pressure, and the secondary deaerator level control valve remains fully closed. Finally, when the load increases from the third load range to the fourth load range, the secondary deaerator level control valve is opened and condensate is replenished through it. In this embodiment of the application, during the operation of the generator set, the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve are put into automatic adjustment mode. Then, by acquiring the load of the generator set in real time and based on the load range of multiple stages, the working mode of the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve is adjusted. This improves the automation level of the generator set and enhances the economy of the generator set when operating under wide loads. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a condensate system for a generator set provided in an embodiment of this application;

[0022] Figure 2This is a schematic flowchart of a condensate system control method for a generator set provided in an embodiment of this application;

[0023] Figure 3 This is a schematic flowchart of a condensate system control method for a generator set provided in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be understood that in the description of the embodiments of this application, the use of terms such as "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated. "At least one" refers to one or more, and "more" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any group of these items, including any group of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0026] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0027] With the establishment of the national dual-carbon strategy and the implementation of frequency regulation market and electricity market trading, the environmental protection and energy-saving requirements for generator units are becoming increasingly stringent. How to further tap the energy-saving potential of generator units under normal wide-load operation conditions and improve their economic efficiency at full load has become a key focus for power generation companies.

[0028] Based on this, the embodiments of this application propose a control method for the condensate system of a generator set and a condensate system for the generator set, which can improve the economy of the generator set operating at full load.

[0029] First, a control method for a generator set's condensate system provided in an embodiment of this application is described. (See also...) Figure 1 , Figure 1A schematic diagram of the condensate system of a generator set according to an embodiment of this application is shown. Figure 1 As shown, the condensate system includes a condenser, a variable frequency condensate pump, a deaerator water level main regulating valve, a deaerator water level auxiliary regulating valve, and a deaerator. (See attached image.) Figure 2 , Figure 2 This is a schematic flowchart of a condensate system control method for a generator set provided in an embodiment of this application, as shown below. Figure 2 As shown, the method includes, but is not limited to, steps S110 to S160.

[0030] Step S110: Put the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve into automatic adjustment mode.

[0031] Step S120: Obtain the load of the generator set in real time during the operation of the generator set:

[0032] Step S130: When the load is in the first load range, the condensate pressure is controlled by the variable frequency condensate pump, the deaerator water level is controlled by the deaerator water level auxiliary regulating valve in a single-impulse regulation mode, and the deaerator water level main regulating valve is kept fully closed.

[0033] Step S140: When the load increases from the first load range to the second load range, the deaerator water level main regulating valve is opened and the deaerator water level is controlled by the three-impulse regulation method through the deaerator water level main regulating valve, and the deaerator water level secondary regulating valve is closed at a preset rate.

[0034] Step S150: When the load increases from the second load range to the third load range, the deaerator water level is controlled by the variable frequency condensate pump using a three-impulse regulation method, the condensate pressure is controlled by the main deaerator water level control valve, and the secondary deaerator water level control valve is kept fully closed.

[0035] Step S160: When the load increases from the third load range to the fourth load range, the deaerator water level auxiliary regulating valve is opened and condensate replenishment is performed through the deaerator water level auxiliary regulating valve.

[0036] Understandably, during generator set operation, the variable frequency condensate pump, deaerator water level main control valve, and deaerator water level auxiliary control valve are put into automatic regulation mode. By acquiring the generator set's load in real time and adjusting the operating modes of these valves based on multiple load ranges, the generator set's automation level is improved, thereby enhancing its economy during wide-load operation. It should be noted that the full load range is divided into four segments: the first load range, the second load range, the third load range, and the fourth load range, all of which are continuous ranges.

[0037] On the one hand, the condensate system suffers from significant throttling losses due to the large margins in the capacity and head of the condensate pumps. This is especially problematic under peak-shaving conditions and when the deaerator level control valves are not fully open. Furthermore, the condensate pumps operate far outside their designed high-efficiency range, impacting the economic operation of the generator set. Therefore, variable frequency drive (VFD) technology is used to adjust the pump speed, thereby regulating the condensate pump speed. This, combined with the main and auxiliary deaerator level control valves, helps control and maintain the deaerator level. By adjusting the condensate pump's VFD, the condensate flow and pressure adapt to changes in the unit load, reducing throttling losses from the control valves.

[0038] On the other hand, based on the actual application scenarios of thermal power units and their condensate systems, the range values ​​of the first load range, the second load range, the third load range, and the fourth load range are set. This allows for adaptive adjustment of the operating modes of the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve for different load stages, thereby improving the economic efficiency of the generator unit operating at full load.

[0039] In some embodiments, see Figure 3 As shown, Figure 3 This application provides a schematic flowchart of a condensate system control method for a generator set, as illustrated in an embodiment of the present application. Figure 3 As shown, the first load range is 0% to 25% of the unit's rated capacity (Pe), the second load range is 25% to 38% Pe, the third load range is 38% to 60% Pe, and the fourth load range is 60% to 100% Pe.

[0040] Understandably, the condensate pump controls condensate pressure when the load is in the first and second load ranges, and controls deaerator level when the load is in the third and fourth load ranges. Therefore, when the load is higher than 25% Pe, the main deaerator level control valve and the secondary deaerator level control valve are switched, and the main deaerator level control valve is connected to the deaerator level control pipe. This allows the condensate pump to engage deaerator level control earlier (when the load is higher than 38% Pe), reducing the workload of operation monitoring and the power consumption of the condensate pump, and lowering the condensate pressure earlier.

[0041] It should be noted that the single-impulse regulation method refers to a regulation method that uses the deaerator water level as feedback information, while the three-impulse regulation method refers to a regulation method that uses the deaerator water level, deaerator feedwater flow rate, and condensate flow rate as feedback information. For example, Figure 1 As shown, the deaerator water level can be measured by a deaerator water level gauge installed inside the deaerator. The deaerator feedwater flow rate can be measured by a condensate flow meter installed between the deaerator inlet and the deaerator water level control valve. The condensate flow rate can be measured by a flow meter installed between the deaerator water level control valve and the condensate pump. The condensate pressure refers to the condensate pump header outlet pressure, which can be measured by a pressure gauge installed between the deaerator water level control valve and the condensate pump.

[0042] It should also be noted that condensate pressure control refers to adjusting condensate pressure by controlling the rotation speed of the condensate valve or the valve opening of the deaerator water level control valve, while deaerator water level control refers to adjusting the deaerator water level by controlling the rotation speed of the condensate valve or the valve opening of the deaerator water level control valve.

[0043] Understandably, during the load reduction process, the variable frequency condensate pump, the main deaerator level control valve, and the secondary deaerator level control valve are put into automatic regulation mode.

[0044] When the load drops from the fourth load range to the third load range, the deaerator water level is controlled by the condensate pump using a three-impulse regulation method, the condensate pressure is controlled by the main deaerator water level control valve, the secondary deaerator water level control valve is closed, and the secondary deaerator water level control valve stops replenishing the condensate.

[0045] When the load drops from the third load range to the second load range, the condensate pressure is adjusted by the condensate pump, and the deaerator water level is controlled by the main deaerator water level control valve in a three-impulse manner, while keeping the secondary deaerator water level control valve fully closed.

[0046] When the load drops from the second load range to the first load range, the valves of the deaerator water level main control valve and the deaerator water level auxiliary control valve are switched until the deaerator water level main control valve is fully closed. The deaerator water level is controlled by the deaerator water level auxiliary control valve in a single-impulse regulation mode, and the condensate pressure is controlled by the condensate pump.

[0047] In some embodiments, the condensate replenishment via the deaerator water level auxiliary regulating valve includes:

[0048] The deaerator water level auxiliary regulating valve adjusts the condensate replenishment amount based on the load, condensate pressure, and deaerator feedwater flow rate.

[0049] Understandably, when the unit is under high load, specifically in the final fourth load range, the condensate pump uses a three-impulse regulation method to control the deaerator water level, and the main deaerator water level control valve controls the condensate pressure. As the load increases, the secondary deaerator water level control valve adjusts the condensate replenishment based on the load, condensate pressure, and deaerator feedwater flow rate, which further reduces the condensate pressure of the unit during the high load phase.

[0050] In some embodiments, when condensate pressure is controlled by the deaerator water level regulating valve and the condensate pump, the maximum value among the first preset value of the load function superimposed with the manual bias, the second preset value of the condensate pump sealing water pressure + 0.2 MPa, and the third preset value of the condensate pressure required for low bypass operation + 0.2 MPa is taken as the condensation pressure setting value, which serves as a protective limit during condensate pressure control.

[0051] In some embodiments, during the operation of the thermal power unit, deaerator water level regulation is the primary safety assurance objective. As long as any of the main and auxiliary deaerator water level regulating valves and condensate pumps is in automatic regulation mode, deaerator water level regulation is prioritized. For each load range failure scenario:

[0052] When the load is in the first load range and a fault occurs, switch the variable frequency condensate pump to manual adjustment mode, switch the deaerator water level auxiliary valve to manual adjustment mode, open the deaerator water level main valve, and control the deaerator water level through the deaerator water level main valve in a single-impulse adjustment mode.

[0053] When the load is in the second load range and a fault occurs, switch the variable frequency condensate pump to manual adjustment mode, switch the deaerator water level main control valve to manual adjustment mode, open the deaerator water level secondary control valve, and control the deaerator water level in a single-impulse manner through the deaerator water level secondary control valve.

[0054] When the load is in the third load range and a fault occurs, switch the variable frequency condensate pump to manual adjustment mode and control the deaerator water level through the main deaerator water level control valve in a three-impulse manner. If the main deaerator water level control valve is not in automatic adjustment mode, open the secondary deaerator water level control valve and control the deaerator water level through the secondary deaerator water level control valve in a single-impulse manner. Alternatively, keep the variable frequency condensate pump in automatic adjustment mode, switch the main deaerator water level control valve to manual adjustment mode, and continue to control the deaerator water level through the variable frequency condensate pump using the three-impulse adjustment method.

[0055] When the load is in the fourth load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode. The deaerator water level is controlled by the deaerator water level main control valve in a three-impulse adjustment mode. The deaerator water level is controlled by the deaerator water level main control valve according to the load. If the deaerator water level main control valve is not in automatic adjustment mode, the deaerator water level is controlled by the deaerator water level main control valve in a single-impulse adjustment mode.

[0056] In some embodiments, such as Figure 1 As shown, the condensate system also includes a power frequency condensate pump. After the power frequency interlock starts, the method further includes: the deaerator water level main control valve overshoots to the opening degree corresponding to the current load and then controls the deaerator water level using a three-impulse regulation method; the variable frequency condensate pump switches from automatic regulation to manual regulation. Deaerator water level control is preferentially switched to deaerator water level main control valve control; the deaerator water level secondary control valve in the cascade loop first overshoots to the load-corresponding opening degree function at the time of the power frequency switch and then switches to closed-loop regulation. If the deaerator water level main control valve is not in automatic regulation mode, the deaerator water level is controlled through the deaerator water level secondary control valve.

[0057] This application also provides a condensate system for a generator set, such as... Figure 1 As shown, the system includes a condenser, a variable frequency condensate pump, a deaerator water level main control valve, a deaerator water level auxiliary control valve, and a deaerator. The condensate system implements the condensate system control method of the generator set described above.

[0058] It should be understood that the specific steps, processes, and effects of the condensate system of a generator set provided in this application embodiment can be found in the relevant descriptions in the generator set condensate system control method provided in the above embodiments, and will not be repeated here.

[0059] It should be noted that in the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0060] This embodiment of the application, during generator set operation, puts the variable frequency condensate pump, deaerator water level main control valve, and deaerator water level auxiliary control valve into automatic regulation mode, and acquires the generator set load in real time. Then, it adjusts the operating modes of the variable frequency condensate pump, deaerator water level main control valve, and deaerator water level auxiliary control valve according to load changes. Specifically, when the load is in the first load range, the variable frequency condensate pump controls the condensate pressure, and the deaerator water level is controlled by the deaerator water level auxiliary control valve using a single-impulse regulation method, while keeping the deaerator water level main control valve fully closed. When the load increases from the first load range to the second load range, the deaerator water level main and auxiliary control valves are switched. The process involves several steps: First, the main deaerator level control valve is opened and the deaerator level is controlled using a three-impulse regulation method. The secondary deaerator level control valve is closed at a preset rate. Second, when the load increases from the second load range to the third load range, the deaerator level control is switched from the main deaerator level control valve to the variable frequency condensate pump. This means the deaerator level is controlled using a three-impulse regulation method, while the main deaerator level control valve controls the condensate pressure, and the secondary deaerator level control valve remains fully closed. Finally, when the load increases from the third load range to the fourth load range, the secondary deaerator level control valve is opened and condensate is replenished through it. In this embodiment of the application, during the operation of the generator set, the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve are put into automatic adjustment mode. Then, by acquiring the load of the generator set in real time and based on the load range of multiple stages, the working mode of the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve is adjusted. This improves the automation level of the generator set and enhances the economy of the generator set when operating under wide loads.

[0061] The foregoing has provided a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined in this application.

Claims

1. A control method for the condensate system of a generator set, characterized in that, The condensate system includes a condenser, a variable frequency condensate pump, a deaerator water level main control valve, a deaerator water level auxiliary control valve, and a deaerator. The method includes: Put the variable frequency condensate pump, the main deaerator water level control valve, and the secondary deaerator water level control valve into automatic adjustment mode. The load of the generator set is acquired in real time during the operation of the generator set: When the load is in the first load range, the condensate pressure is controlled by the variable frequency condensate pump, the deaerator water level is controlled by the deaerator water level auxiliary regulating valve in a single-impulse regulation mode, and the deaerator water level main regulating valve is kept fully closed. When the load increases from the first load range to the second load range, the deaerator water level main control valve is opened and the deaerator water level is controlled by the three-impulse regulation method through the deaerator water level main control valve, and the deaerator water level secondary control valve is closed at a preset rate. When the load increases from the second load range to the third load range, the deaerator water level is controlled by the variable frequency condensate pump using a three-impulse regulation method, the condensate pressure is controlled by the main deaerator water level control valve, and the secondary deaerator water level control valve is kept fully closed. When the load increases from the third load range to the fourth load range, the deaerator water level auxiliary regulating valve is opened, and the condensate replenishment is adjusted according to the load, the condensate pressure, and the deaerator feedwater flow rate through the deaerator water level auxiliary regulating valve. The value of the condensate pressure is the maximum value among the following: a first preset value of the load superimposed with the first preset value of the operating bias, a second preset value greater than the sealing water pressure of the variable frequency condensate pump, and a third preset value greater than the condensate pressure under low bypass operation requirements. The first load range is 0% to 25% of the unit's rated capacity, the second load range is 25% to 38% of the unit's rated capacity, the third load range is 38% to 60% of the unit's rated capacity, and the fourth load range is 60% to 100% of the unit's rated capacity.

2. The method according to claim 1, characterized in that, The method further includes: When the load is in the first load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, the deaerator water level auxiliary regulating valve is switched to manual adjustment mode, the deaerator water level main regulating valve is opened, and the deaerator water level is controlled by single-impulse regulation through the deaerator water level main regulating valve.

3. The method according to claim 1, characterized in that, The method further includes: When the load is in the second load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, the deaerator water level main control valve is switched to manual adjustment mode, the deaerator water level secondary control valve is opened, and the deaerator water level is controlled by single impulse through the deaerator water level secondary control valve.

4. The method according to claim 1, characterized in that, The method further includes: When the load is in the third load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, and the deaerator water level is controlled in a three-impulse manner through the deaerator water level main control valve. If the deaerator water level main control valve is not in automatic adjustment mode, the deaerator water level secondary control valve is opened and the deaerator water level is controlled in a single-impulse manner through the deaerator water level secondary control valve.

5. The method according to claim 1, characterized in that, The method further includes: When the load is in the third load range and a fault occurs, the variable frequency condensate pump is kept in automatic adjustment mode, the deaerator water level main control valve is switched to manual adjustment mode, and the deaerator water level is controlled by the variable frequency condensate pump using the three-impulse adjustment method.

6. The method according to claim 1, characterized in that, The method further includes: When the load is in the fourth load range and a fault occurs, the variable frequency condensate pump is switched to manual adjustment mode, and the deaerator water level is controlled by the deaerator water level main control valve in a three-impulse adjustment mode. The deaerator water level is controlled by the deaerator water level main control valve according to the load. If the deaerator water level main control valve is not in automatic adjustment mode, the deaerator water level is controlled by the deaerator water level main control valve in a single-impulse adjustment mode.

7. A condensate system for a generator set, characterized in that, The condensate system includes a condenser, a variable frequency condensate pump, a deaerator water level main control valve, a deaerator water level auxiliary control valve, and a deaerator, and the condensate system performs the method as described in any one of claims 1 to 6.

Images