CN113141027A - System and method for adapting load power factor of mobile gas turbine generator set - Google Patents
System and method for adapting load power factor of mobile gas turbine generator set Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/02—Details of the control
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Abstract
本发明公开了一种移动型燃气轮机发电机组适应负荷功率因数的系统和方法，涉及应急发电技术领域，包括：发电机组，发电机组为可移动的燃气轮机发电机组；可调节电抗器，可调节电抗器的输入端与发电机组的输出端电连接；输出母线，输出母线的第一端与可调节电抗器的输出端电连接，输出母线的第二端与负荷的输入端电连接；采集单元，采集单元与输出母线电连接；控制单元，控制单元的输入端与采集单元电连接，控制单元的输出端与可调节电抗器电连接，调节可调节电抗器产生的无功功率的极性和无功功率的容量大小，进一步平衡发电机组输出的部分无功功率。本发明采用在发电机组的输出端串联可调节电抗器的方式，使发电机组稳定、安全、经济的运行。
The invention discloses a system and method for adapting a load power factor of a mobile gas turbine generator set, and relates to the technical field of emergency power generation, comprising: a generator set, which is a movable gas turbine generator set; an adjustable reactor, an adjustable reactor The input end of the generator set is electrically connected with the output end of the generator set; the output busbar, the first end of the output busbar is electrically connected with the output end of the adjustable reactor, and the second end of the output busbar is electrically connected with the input end of the load; The unit is electrically connected to the output busbar; the control unit, the input end of the control unit is electrically connected to the acquisition unit, and the output end of the control unit is electrically connected to the adjustable reactor to adjust the polarity and reactive power of the reactive power generated by the adjustable reactor The size of the power capacity further balances part of the reactive power output by the generator set. The invention adopts the method of connecting the adjustable reactor in series at the output end of the generator set, so that the generator set can run stably, safely and economically.
Description
Technical Field
The invention relates to the technical field of emergency power generation, in particular to a system and a method for adapting a load power factor of a mobile gas turbine generator set.
Background
After the commercial power of the client is powered off, the vehicle-mounted generator set can be quickly moved to the position of the client to carry out corresponding power protection work. The traditional generator set is designed and manufactured according to national standards, the premise of outputting rated power is that the generator set operates under the working condition of specified rated power factor, and the numerical value of the power factor is lagging, namely, inductive power factor; even if the load of the client is in the form of inductive load for a long time, the output of the generator set can basically meet the load requirement.
In recent years, with the development of power electronic technology, capacitive power factor loads dominate the market, for example, halogen lamps for outdoor lighting are replaced by LED energy-saving lamps, the current of lighting lines is changed from original inductive loads to capacitive loads, and the existing power protection equipment cannot meet the requirements. In addition, the IT equipment such as a computer, a server and a small-sized machine of the data center are designed into capacitive loads, so that the problem of the capacitive load power factor is not outstanding in the power supply environment with small scale of the data center and small power load ratio, but the power supply load of the data center is rapidly expanded along with rapid increase of social communication demand, and the capacitive power factor characteristic of the data center brings great challenges to a vehicle-mounted generator set.
Disclosure of Invention
In view of the above, the present invention provides a system and method for adapting load power factor of a mobile gas turbine generator set, wherein an adjustable reactor is connected in series with an output terminal of the generator set, so that the generator set can operate stably, safely and economically.
In a first aspect, the present application provides a system for adapting a load power factor of a mobile gas turbine power plant, comprising:
the power generating set is a movable gas turbine power generating set, and comprises an output end, and the power generating set outputs active power and reactive power;
the adjustable reactor comprises an input end and an output end, and the input end of the adjustable reactor is electrically connected with the output end of the generator set;
the polarity of the power factor of the load is capacitive or inductive, and the load comprises an input end;
the output bus comprises a first end and a second end, the first end of the output bus is electrically connected with the output end of the adjustable reactor, and the second end of the output bus is electrically connected with the input end of the load;
the acquisition unit is electrically connected with the output bus and is used for acquiring information on the output bus, and the information on the output bus comprises the voltage and the current of the output bus and the phase difference between the voltage and the current;
the control unit comprises an input end and an output end, the input end of the control unit is electrically connected with the acquisition unit, and the control unit calculates the power factor of the load according to the information on the output bus acquired by the acquisition unit; the output end of the control unit is electrically connected with the adjustable reactor and is used for adjusting the polarity of reactive power generated by the adjustable reactor and the capacity of the reactive power, so that the output power factor value of the generator set reaches a threshold value, and partial reactive power output by the generator set is automatically balanced; the power factor of the load comprises the power factor polarity of the load and the capacity of reactive power.
Optionally, the polarity of the output power factor of the generator set adjusted by the adjustable reactor is inductive, and the threshold of the power factor value is 0.95.
Optionally, after the genset automatically balances a portion of the reactive power, the inductive reactive power output by the genset is 1/3 of the active power.
Optionally, the adjustable reactor is a capacity and polarity adjustable reactor.
Optionally, the method further comprises: the generator set is integrated in the container, the container is fixed on a girder of a chassis, and a shock absorber is arranged between the container and the girder;
the container also comprises an air conditioner and a ventilation system, and the outer wall of the container is attached with a heat insulation layer.
In a second aspect, the present application further provides a method for adapting to a load power factor of a mobile gas turbine generator set, where the mobile gas turbine generator set is moved to a load requiring power conservation, and the generator set automatically adjusts an output power factor of the generator set through an adjustable reactor under a condition that the power factors of the loads are different, so that the output power factor value of the generator set reaches a threshold value, and the polarity is an inductive value, specifically:
electrically connecting the output end of the generator set with the input end of the adjustable reactor, electrically connecting the output end of the adjustable reactor with the first end of the output bus, and electrically connecting the second end of the output bus with the input end of the load;
electrically connecting the acquisition unit with an output bus, electrically connecting the input end of the control unit with the acquisition unit, and electrically connecting the output end of the control unit with the adjustable reactor;
the acquisition unit acquires information on the output bus and transmits the information to the control unit, the control unit calculates the power factor of the load according to the information on the output bus, adjusts the polarity of the reactive power of the adjustable reactor and the capacity of the reactive power, correspondingly adjusts the output power factor of the generator set, enables the output power factor value of the generator set to reach a threshold value, and automatically balances the reactive power output by the generator set, wherein the polarity is inductive.
Optionally, the specific method for adjusting the polarity of the reactive power and the capacity of the reactive power of the adjustable reactor is as follows:
the control unit adjusts the polarity of reactive power and the magnitude of reactive power capacity generated by the adjustable reactor according to the power factor of the load, namely the polarity and the capacity of the power factor of the load, so that the adjustable reactor generates reactive power which is opposite to the polarity of the load and is proper in the magnitude of the capacity.
Compared with the prior art, the system and the method for adapting to the load power factor of the mobile gas turbine generator set provided by the invention at least realize the following beneficial effects:
the system and the method for adapting to the load power factor of the mobile gas turbine generator set adopt a mode of connecting an adjustable reactor in series at the output end of the generator set, under application scenes of different load power factors, the system comprises a mode of accurately adjusting the adjustable reactor under application scenes of capacitive load or inductive load, automatically balancing partial reactive power output by the generator set, and outputting sufficient active power on the premise of outputting normal voltage by the balanced generator set, so that the generator set can stably, safely and economically run.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of an external characteristic of a generator set;
fig. 2 is a schematic structural diagram of a generator set system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an exemplary embodiment of a power-generating unit output power ratio;
fig. 4 is a vector diagram of power factors of a generator set and a load according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of an external characteristic curve of a generator set, please refer to fig. 1, it can be seen from the external characteristic curve of the generator set that when the polarity of the load power factor is capacitive, the power factor angle of the load is advanced, that is, the external characteristic curve of the generator set is a rising curve, the output voltage of the generator set increases with the increase of the output current, in order to ensure that the output voltage does not exceed the limit, the generator set can only maintain normal operation by reducing the rated output current, that is, for the capacitive load, the generator set maintains safe operation in the form of sacrificing output power, and the larger the capacitive load power factor angle is, the larger the sacrificial output power is, thus causing the generator set to output reactive power, sacrificing the output power, and causing the energy not to be utilized to the maximum.
The following detailed description is to be read in connection with the drawings and the detailed description.
Fig. 2 is a schematic structural diagram of a power generating unit system according to an embodiment of the present application, and referring to fig. 2, the present application provides a system 100 for adapting load power factor of a mobile gas turbine power generating unit, including:
the power generating set 10 is a movable gas turbine power generating set 10, the power generating set 10 comprises an output end, and the power generating set 10 outputs active power and reactive power;
the adjustable reactor 20 comprises an input end and an output end, and the input end of the adjustable reactor 20 is electrically connected with the output end of the generator set 10;
a load 30, the polarity of the power factor of the load 30 is capacitive or inductive, the load 30 comprises an input end;
an output bus 40, wherein the output bus 40 comprises a first end and a second end, the first end of the output bus 40 is electrically connected with the output end of the adjustable reactor 20, and the second end of the output bus 40 is electrically connected with the input end of the load 30;
the acquisition unit 50 is electrically connected with the output bus 40 and is used for acquiring information on the output bus 40, and the information on the output bus 40 comprises the voltage and the current of the output bus 40 and the phase difference between the voltage and the current;
the control unit 60, the control unit 60 includes an input end and an output end, the input end of the control unit 60 is electrically connected with the acquisition unit 50, and the control unit 60 calculates the power factor of the load 30 according to the information on the output bus 40 acquired by the acquisition unit 50; the output end of the control unit 60 is electrically connected to the adjustable reactor 20, and is used for adjusting the polarity of the reactive power generated by the adjustable reactor 20 and the capacity of the reactive power, so that the output power factor value of the generator set 10 reaches a threshold value, and automatically balancing part of the reactive power output by the generator set 10; the power factor of the load 30 includes the power factor polarity and the reactive power capacity of the load 30.
It should be noted that the generator set 10 in this embodiment is a movable gas turbine generator set, and can be moved to a load position where power conservation is required, and the specific implementation is that the generator set is a vehicle-mounted gas turbine generator set, and through the movable arrangement, the generator set can be flexibly applied to various scenes, so that the practicability of the generator set 10 is improved; the load 30 in this embodiment may be various electric devices, such as an office electric device, a home electric device, a conference electric device, and the like, which is not required in this application; the load 30 in this embodiment is a capacitive load or an inductive load, which is not required by the present application.
Specifically, as shown in fig. 2, the generator set system in this embodiment moves to the load 30 that needs to maintain power when the utility power is lost, so as to efficiently maintain power for various loads 30. The generator set system comprises a generator set 10, an adjustable reactor 20, a load 30, an output bus 40, a collection unit 50 and a control unit 60, wherein the output end of the generator set 10 is electrically connected with the input end of the adjustable reactor 20, and the output end of the adjustable reactor 20 is electrically connected with the load 30; optionally, an output bus 40 is further provided, a first end of the output bus 40 is electrically connected with the output end of the adjustable reactor 20, and a second end of the output bus 40 is electrically connected with the input end of the load 30, so that the adjustable reactor 20 is electrically connected with the load 30; in addition, the output bus 40 is also electrically connected with the acquisition unit 50, and the acquisition unit 50 can acquire information on the output bus 40, that is, the voltage and the current on the output bus 40, and the phase difference between the voltage and the current, and the acquired information is used for the next calculation.
Further, as shown in fig. 2, an input end of the control unit 60 in the present embodiment is electrically connected to the acquisition unit 50, and an output end of the control unit 60 is electrically connected to the adjustable reactor 20; the control unit 60 calculates a specific numerical value of the power factor of the load 30 and the polarity of the power factor of the load according to the information on the output bus 40 acquired by the acquisition unit 50, and according to the power factor of the load 30, the control unit 60 adjusts the property of the reactive power generated by the adjustable reactor 20 and the capacity of the reactive power so that the numerical value of the output power factor of the generator set 10 reaches a threshold value, at this time, no matter the output power factor of the generator set 10 is higher or lower than the threshold value, the control unit 60 can make the output power factor reach the threshold value under the adjustment of the control unit 60, so that part of the reactive power output by the generator set 10 can be automatically balanced, and on the premise that the balanced generator set 10 outputs normal voltage, sufficient active power is output, so that the generator set 10 can operate stably, safely and economically.
Optionally, as shown in fig. 2, the polarity of the output power factor of the generator set 10 after being adjusted by the adjustable reactor is inductive, and the threshold of the power factor value is 0.95.
Specifically, referring to fig. 2, in this embodiment, the threshold of the output power factor value of the generator set 10 after being adjusted by the adjustable reactor 20 is 0.95, and the polarity of the output power of the generator set 10 is inductive; when the output power factor value of the generator set 10 is larger, the larger the output power is, the serious heating of the generator set 10 is caused, and the long-time use of the generator set 10 can influence the service life of the generator set 10, and in addition, the larger the output power of the generator set 10 is, the greater the difficulty in realizing the movement of the generator set 10 is; when the output power factor value of the generator set 10 is smaller, the application scenes of the movable generator set 10 are fewer, and the movable generator set cannot be well applied; therefore, the threshold of the output power factor of the generator set 10 in this embodiment is set to 0.95, which can maximize the efficiency of the generator set 10 and has a wide application range.
It should be noted that the output power range of the generator set 10 in this embodiment is 1000KW to 4000KW, which basically meets various application scenarios.
Optionally, fig. 3 is a schematic structural diagram of the output power ratio of the generator set provided in the embodiment of the present application, please refer to fig. 3 in combination with fig. 2, and after the generator set 10 automatically balances part of the reactive power, the inductive reactive power output by the generator set 10 is 1/3 of the active power.
Specifically, please refer to fig. 3 in combination with fig. 2, in this embodiment, after the generator set 10 automatically balances partial reactive power, the inductive power output by the generator set 10 is 1/3 times of the active power, so that the threshold of the output power factor value of the generator set 10 adjusted by the adjustable reactor 20 can reach 0.95, and the generator set 10 can operate efficiently, safely and stably.
Alternatively, the adjustable reactor 20 is a capacity and polarity adjustable reactor.
Specifically, in this embodiment, the capacity and polarity of the adjustable reactor 20 are variable, and according to the power factor value of the load 30, the control unit 60 adjusts the property of the reactive power generated by the reactor and the magnitude of the reactive power, so that the output power factor value of the generator set 10 finally reaches the threshold value, so as to balance the reactive power output by the generator set 10, and thus the generator set 10 operates efficiently.
Optionally, please refer to fig. 2, which further includes: the generator set 10 is integrated in the container, the container is fixed on a girder of a chassis, and a shock absorber is arranged between the container and the girder;
the container also comprises an air conditioner and a ventilation system, and the outer wall of the container is attached with a heat insulation layer.
Specifically, referring to fig. 2, in the present embodiment, the generator set system further includes a container (not shown in the figure), the generator set 10 is integrated in the container, the container is fixed on a girder of the chassis, and a shock absorber is installed between the container and the girder, and the shock absorber can effectively reduce the shock force applied to the generator set 10 during operation; in addition, the container also comprises an air conditioner and a ventilation system, and the outer wall of the container is attached with an insulating layer, so that on one hand, proper temperature is provided for the container, and the stable operation of the generator set system in a low-temperature environment is ensured; on the other hand, fresh air is continuously charged into the container, which is beneficial to the effective operation of the generator set 10.
Based on the same inventive concept, please refer to fig. 2, the present application further provides a method for adapting to load power factor for a mobile gas turbine generator set, wherein the mobile gas turbine generator set 10 is moved to a load 30 requiring power conservation, and the generator set 10 automatically adjusts the output power factor of the generator set 10 through an adjustable reactor under the condition that the power factors of the load 30 are different, so that the output power factor value of the generator set 10 reaches a threshold value, and the polarity is an inductive value, specifically:
electrically connecting the output end of the generator set 10 with the input end of the adjustable reactor, electrically connecting the output end of the adjustable reactor with the first end of the output bus 40, and electrically connecting the second end of the output bus 40 with the input end of the load 30;
electrically connecting the acquisition unit 50 with the output bus 40, electrically connecting the input end of the control unit 60 with the acquisition unit 50, and electrically connecting the output end of the control unit 60 with the adjustable reactor;
the collecting unit 50 collects information on the output bus 40 and transmits the information to the control unit 60, the control unit 60 calculates the power factor of the load 30 according to the information on the output bus 40, adjusts the polarity of the reactive power of the adjustable reactor and the capacity of the reactive power, correspondingly adjusts the output power factor of the generator set 10, and enables the output power factor value of the generator set 10 to reach a threshold value, the polarity is inductive, and the reactive power output by the generator set 10 is automatically balanced.
Specifically, please refer to fig. 2, in this embodiment, a movable gas turbine generator set 10 is moved to a position of a load 30 requiring power protection, and the generator set 10 automatically adjusts an output power factor of the generator set 10 through an adjustable reactor under a condition that the power factors of the load 30 are different, so that the value of the output power factor of the generator set 10 reaches a threshold value, which can automatically balance a part of reactive power output by the generator set 10, and output sufficient active power on the premise that the balanced generator set 10 outputs a normal voltage, so that the generator set 10 stably, safely and economically operates, specifically:
electrically connecting the output end of the generator set 10 with the input end of the adjustable reactor, electrically connecting the output end of the adjustable reactor with the first end of the output bus 40, electrically connecting the second end of the output bus 40 with the input end of the load 30, electrically connecting the acquisition unit 50 with the output bus 40, electrically connecting the input end of the control unit 60 with the acquisition unit 50, and electrically connecting the output end of the control unit 60 with the adjustable reactor;
the collecting unit 50 collects the voltage and the current on the output bus 40 and the phase difference between the voltage and the current, the control unit 60 can calculate the power factor of the load 30 through the information, the control unit 60 adjusts the polarity of the reactive power of the adjustable reactor and the capacity of the reactive power according to the power factor of the load 30, correspondingly adjusts the output power factor of the generator set 10, so that the output power factor value of the generator set 10 reaches a threshold value, the polarity is inductive, the reactive power output by the generator set 10 is automatically balanced, and through the steps, the generator set 10 can operate efficiently and safely, and the movable electricity protection can be realized.
Optionally, please refer to fig. 2, a specific method for adjusting the polarity of the reactive power and the capacity of the reactive power of the adjustable reactor 20 is as follows:
the control unit 60 adjusts the polarity of the reactive power generated by the adjustable reactor and the magnitude of the reactive power capacity according to the power factor of the load 30, that is, the polarity and the capacity of the power factor of the load 30, so that the adjustable reactor generates the reactive power with the polarity opposite to that of the load 30 and the appropriate magnitude of the capacity.
Specifically, referring to fig. 2, in the present embodiment, the parameters of the adjustable reactor 20 are specifically adjusted as follows: the control unit 60 adjusts the polarity of the reactive power generated by the adjustable reactor 20 and the capacity of the reactive power according to the power factor value of the load 30, including the power polarity and the power magnitude of the load 30, so that the polarity and the magnitude of the reactive power generated by the adjustable reactor 20 are opposite to the power polarity of the load 30 and the capacity is proper, and thus, the reactive power of the generator set 10 is automatically balanced and sufficient active power is output.
The content of the present application will be further explained below in a practical case.
Fig. 4 shows a vector diagram of power factors of a generator set and a load provided in the embodiment of the present application, please refer to fig. 4 in combination with fig. 2, in order to satisfy an application scenario of more than 95%, an output power of the generator set 10 in the embodiment needs to be adapted to an adjustable maximum range of the power factor of the load 30:
(load 30 Power polarity is perceptual)
(the power polarity of the load 30 is capacitive), the output power factor value of the generator set 10 after being balanced by the adjustable reactor reaches a threshold value, that is to say
(the polarity of the output power of the generator set 10 is inductive), specifically: at present, the information on the factory nameplate of a certain generator set 10 is taken as a reference to carry out accurate configuration calculation, the information on the nameplate shows that the output power P of the generator set 10 is 1600KW, and the numerical value of the output power factor is 1600KW
(the generator set 10 is a lag generator set 10); calculating the capacity of the adjustable reactor 20 according to the property of the load 30; first, the maximum compensated reactive power Q of the capacitive load 30 is calculatedlPlease refer toReferring to fig. 4, the self-brought inductive reactive power of the generator set 10 is
The capacitive reactive power of the load 30 is
The two have proper capacity and opposite polarity, and can be completely offset; thus, the output power of genset 10 need only be from
Compensating to inductive reactive power of
That is, referring to fig. 3, according to the triangular model of power, the compensated power factor of the generator set 10 is:
the inductive reactive power Q/P of the compensated output of the generator set 10 is 1/3, Ql533kvar (inductive) 1600/3; secondly, the reactive power Q with the property of maximum compensation of the inductive load 30 is calculatedcReferring to fig. 3, according to the power triangle model, the compensated power factor of the generator set 10 is
When the load has a power factor of 30
If the compensated power factor is 1, then Q/P is 71/70 ≈ 1; q01600kvar (capacitive) is achieved according to the compensated power factor of the generator set 10
The result of the compensation calculation of the capacitive load 30 is: qc1600kvar (capacitive) -533kvar (inductive) -1067 kvar (capacitive); from this, it follows that the adjustable range of the adjustable reactor 20 is: 1067kvar (capacitive) -533kvar (inductive), further, the polarity and the capacity of the output power of the adjustable reactor 20 are adjusted, and the reactive power output by the generator set 10 is balanced, so that the efficient operation of the generator set 10 is guaranteed.
The content of the present application will be further explained below in another practical case.
In the system for adapting to load power factor of a mobile gas turbine generator set provided in this embodiment, please refer to fig. 2, which takes a data center as an example, the data center line is provided with 300 racks, the power consumption of each rack is 5KW, the active power of the total load 30 is 1500KW, the loads 30 of the data center are all IT devices, all are capacitive loads 30, and the average power factor is equal to
(advance), because the expansion of the power distribution room is needed, the power failure operation is necessary, so the application for ensuring the power supply is required.
After receiving the customer demand, the emergency support department arranges a mobile 1600KW/400V gas turbine generator set 10 with adaptive load 30 power factor for emergency, and the mobile 1600KW/400V gas turbine generator set is accessed to the inlet side of a machine room main distribution switch of the data center. Because the original fixed power factor compensation device of the data center is arranged in the power distribution room, and the power supply power factor compensation task is ensured by accessing the machine room of the data center only by the generator set 10 because the power supply room is powered off. In order to avoid the surge caused by power restart after the power failure of the data center, the guarantee scheme is that the generator set 10 runs in parallel with the mains supply, then the load 30 is sequentially and completely transferred to the generator set 10, and the power distribution room is maintained in a power failure mode. In the process that the load 30 of the generator set 10 is continuously increased, the adjustable reactor 20 is also automatically and synchronously adjusted, when the load 30 is transferred, the commercial power is cut off, all the loads 30 are supplied by the generator set 10, the terminal of the generator set 10 displays that the output power is 1496KW, the compensation power is 500Kvar, the power factor is 0.95, and the output voltage is alternating current 402v, so far, the generator set 10 operates in an island for 11 hours, and displays that the temperature rise of each item of the rotor, the stator and the like of the generator set 10 is in a safe range every half hour, and the current power-preserving task operates efficiently, safely and stably.
In summary, the invention at least achieves the following advantages:
the system and the method for adapting to the load power factor of the mobile gas turbine generator set adopt a mode of connecting an adjustable reactor in series at the output end of the generator set, under application scenes of different load power factors, the system comprises a mode of accurately adjusting the adjustable reactor under application scenes of capacitive load or inductive load, automatically balancing partial reactive power output by the generator set, and outputting sufficient active power on the premise of outputting normal voltage by the balanced generator set, so that the generator set can stably, safely and economically run.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. A system for adapting load power factor for a mobile gas turbine power generation unit, comprising:
the generator set is a movable gas turbine generator set and comprises an output end, and the generator set outputs active power and reactive power;
the adjustable reactor comprises an input end and an output end, and the input end of the adjustable reactor is electrically connected with the output end of the generator set;
the polarity of the power factor of the load is capacitive or inductive, and the load comprises an input end;
an output bus comprising a first end and a second end, the first end of the output bus being electrically connected to the output of the adjustable reactor, the second end of the output bus being electrically connected to the input of the load;
the acquisition unit is electrically connected with the output bus and is used for acquiring information on the output bus, and the information on the output bus comprises the voltage and the current of the output bus and the phase difference between the voltage and the current;
the control unit comprises an input end and an output end, the input end of the control unit is electrically connected with the acquisition unit, and the control unit calculates the power factor of the load according to the information on the output bus acquired by the acquisition unit; the output end of the control unit is electrically connected with the adjustable reactor and is used for adjusting the polarity of reactive power generated by the adjustable reactor and the capacity of the reactive power, so that the output power factor value of the generator set reaches a threshold value, and partial reactive power output by the generator set is automatically balanced; wherein the power factor of the load comprises the power factor polarity of the load and the capacity magnitude of the reactive power.
2. The system of claim 1, wherein the output power factor of the genset after regulation by the adjustable reactor has an inductive polarity and a power factor value threshold of 0.95.
3. The system of claim 2, wherein the reactive power output by the genset is 1/3 real power after the genset automatically balances a portion of the reactive power.
4. The system for adapting load power factor of a mobile gas turbine power generation unit according to claim 1, wherein said adjustable reactor is a capacity and polarity adjustable reactor.
5. The system for adapting load power factor of a mobile gas turbine power generation unit of claim 1, further comprising: the generator set is integrated in the container, the container is fixed on a girder of a chassis, and a shock absorber is arranged between the container and the girder;
the container also comprises an air conditioner and a ventilation system, and the outer wall of the container is attached with a heat insulation layer.
6. A method for adapting load power factor of a mobile gas turbine generator set is characterized in that the mobile gas turbine generator set is moved to the load needing power conservation, the generator set automatically adjusts the output power factor of the generator set through an adjustable reactor under the condition that the power factors of the loads are different, so that the value of the output power factor of the generator set reaches a threshold value, and the polarity is inductive, and specifically, the method comprises the following steps:
electrically connecting an output end of the generator set with an input end of the adjustable reactor, electrically connecting an output end of the adjustable reactor with a first end of the output bus, and electrically connecting a second end of the output bus with an input end of the load;
electrically connecting the acquisition unit with the output bus, electrically connecting the input end of the control unit with the acquisition unit, and electrically connecting the output end of the control unit with the adjustable reactor;
the control unit calculates the power factor of the load according to the information on the output bus, adjusts the polarity of the reactive power of the adjustable reactor and the capacity of the reactive power, correspondingly adjusts the output power factor of the generator set, enables the output power factor value of the generator set to reach a threshold value, and automatically balances the reactive power output by the generator set when the polarity is sensitive.
7. The method of claim 6, wherein the adjusting the polarity of the reactive power and the magnitude of the capacity of the reactive power of the adjustable reactor is performed by:
the control unit adjusts the polarity and the reactive power capacity of the reactive power generated by the adjustable reactor according to the power factor of the load, namely the polarity and the capacity of the power factor of the load, so that the adjustable reactor generates the reactive power with the polarity opposite to that of the load and the proper capacity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115149572A (en) * | 2022-07-13 | 2022-10-04 | 北京百度网讯科技有限公司 | Parallel operation control method and device of generator and computer program product |
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| CN112736990A (en) * | 2020-12-02 | 2021-04-30 | 邯郸钢铁集团有限责任公司 | Method for adjusting reactive power balance of power generation and utilization system |
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