CN210183018U - Grid-connected power supply system and grid-connected device of data center - Google Patents
Grid-connected power supply system and grid-connected device of data center Download PDFInfo
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Abstract
The utility model provides a data center's power supply system and device that is incorporated into power networks, wherein the power supply system that is incorporated into power networks includes first generator group and power supply line at least, the external power supply source is connected to the input of power supply line, the load equipment of data center is connected to the output of power supply line, first generator group is connected with the input of power supply line through the device that is incorporated into power networks, the device that is incorporated into power networks is used for carrying out rectification, contravariant and vary voltage processing to the alternating current of first generator group output to make the alternating current of output accord with the contemporary. Therefore, the first generator set can provide supplement and support for the external power supply source, when the external power supply source is limited or the maximum capacity of the external power supply source is exceeded due to the rise of the load power of the data center, the difference of the power required by the load equipment can be supplemented, the reliability of the power supply system is improved, and the situations that the power failure of the data center occurs, the load equipment stops working and the like due to insufficient power supply or the triggering of the line protection of the external power supply source are avoided.
Description
Technical Field
The application relates to the field of electric power, in particular to a grid-connected power supply system and a grid-connected device of a data center.
Background
Data centers are used to house large numbers of IT equipment, such as servers, data storage devices, and network devices, which consume large amounts of electrical energy for their proper operation. When the external power source in the area where the data center is located is in short supply or needs emergency scheduling, the power supply of the external power source is limited and cannot reach the designed capacity, and at this time, a large amount of IT equipment in the data center is forced to stop due to lack of power, so that service interruption is caused, and great loss is brought. In addition, in special extreme weather, such as extreme summer weather with temperature lower than the design value, the cooling power of the cooling equipment in the data center may rise greatly, which may cause the power demand of the data center to exceed the maximum capacity that can be provided by the external power supply source, thereby triggering line protection and causing power failure of the data center.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a grid-connected power supply system and a grid-connected device for a data center, so as to solve the problem that the data center cannot normally operate easily when an external power supply source cannot meet a demand to meet a load demand.
For realizing above-mentioned purpose, this application embodiment provides a data center's power supply system that is incorporated into power networks, and this system includes first generator system and power supply line, the external power supply source is connected to the input of power supply line, data center's load equipment is connected to the output of power supply line, first generator system is connected with the input of power supply line through the device that is incorporated into power networks, the device that is incorporated into power networks includes rectifier module, contravariant module and transformation module, is used for respectively carrying out rectification, contravariant and transformation to the alternating current of first generator system output to the alternating current that makes the output accords with the same term condition.
In addition, some embodiments of the present application further provide a grid-connected device for a grid-connected power supply system, wherein the grid-connected device includes:
the rectifying module is connected with the generator set for providing the alternating current and is used for rectifying the alternating current output by the generator set and outputting direct current;
the inversion module is connected with the output end of the rectification module and used for inverting the direct current obtained by the sorting processing and outputting alternating current;
and the voltage transformation module is connected with the output end of the inversion module and used for carrying out voltage transformation on the alternating current obtained by inversion processing and outputting the alternating current meeting the synchronous condition to a power supply line of a grid-connected power supply system.
The utility model provides a power supply system is incorporated into power networks includes first generator system and power supply line at least, the outside power supply source is connected to the input of power supply line, data center's load equipment is connected to the output of power supply line, first generator system is connected with the input of power supply line through the device of being incorporated into power networks, the device of being incorporated into power networks includes rectifier module, contravariant module and vary voltage module, is used for respectively carrying out rectification, contravariant and vary voltage processing to the alternating current of first generator system output to the alternating current that makes the output accords with the contemporary condition. Therefore, the first generator set can provide supplement and support for the external power supply source, when the external power supply source is limited or the maximum capacity of the external power supply source is exceeded due to the rise of the load power of the data center, the difference of the power required by the load equipment can be supplemented, the reliability of the power supply system is improved, and the situations that the power failure of the data center occurs, the load equipment stops working and the like due to insufficient power supply or the triggering of the line protection of the external power supply source are avoided.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a grid-connected power supply system of a data center according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another grid-connected power supply system of a data center according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a grid-connected device according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a power supply system of a data center according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a grid-connected power supply system of a data center in an embodiment of the present application;
FIG. 6 is a schematic diagram of a grid-connected power supply system of another data center according to an embodiment of the present disclosure;
the same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present application is described in further detail below with reference to the attached figures.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a grid-connected power supply system of a data center, and the structure of the system is shown in fig. 1, and the system comprises a first generator set 100 and a power supply circuit 400. The first generator set is a generator set used for providing grid-connected input, and may include one or more generators, and the power supply line is used for transmitting electric energy from various power supply sources to load equipment of the data center, so that the load equipment of the data center operates normally. In this embodiment, the power supply source may include an external power supply source, such as an area where the data center is located or a power grid of a city, in addition to the first power generation unit.
The input end of the power supply line 400 is connected to the first generator set 100 and the external power source 300, and the output end of the power supply line 400 is connected to the load device 600 of the data center. The first generator set 100 is connected to an input end of the power supply line 400 through a grid connection device 500, and the grid connection device 500 at least includes a rectification module, an inversion module and a transformation module, and is respectively used for rectifying, inverting and transforming the alternating current output by the first generator set, so that the frequency, the phase and the voltage of the output alternating current can be matched with the alternating current provided by an external power supply, and a synchronization condition is met.
The rectifier module is connected to a generator set providing an ac power, that is, connected to the first generator set 100, and configured to rectify the ac power output by the generator set and output a dc power. The inversion module is connected with the output end of the rectification module and used for inverting the direct current obtained by the arrangement processing and outputting alternating current. The transformation module is connected with the output end of the inversion module and is used for transforming the alternating current obtained by the inversion processing and outputting the alternating current meeting the synchronous condition to a power supply circuit 400 of the grid-connected power supply system. For example, when the external power supply source is a power grid, the grid-connected device processes the alternating current generated by the first generator, so that the frequency, the phase and the voltage of the output voltage of the first generator and the power grid can be within a certain range of deviation, and synchronization conditions can be met.
Therefore, the first generator set can provide supplement and support for the external power supply source, when the external power supply source is limited or the maximum capacity of the external power supply source is exceeded due to the rise of the load power of the data center, the difference of the power required by the load equipment can be supplemented, the reliability of the power supply system is improved, and the situations that the power failure of the data center occurs, the load equipment stops working and the like due to insufficient power supply or the triggering of the line protection of the external power supply source are avoided.
In some embodiments of the present application, the grid-tied power supply system of the data center may further include a second generator set. At this time, the grid-connected power supply system is configured as shown in fig. 2, and the second generator set 200 is not connected to the input end of the power supply line 400 through the grid-connected device, and there is a problem in synchronization with the external power supply source 300, so that the second generator set 200 cannot be used as an input source of electric energy together with the external power supply source 300, and in actual use, after the external power supply source is cut off, the second generator set can be used as a backup power supply to supply power to the load device 600 of the data center through the power supply line 400 together with the first generator set.
In an actual scene, the second generator set 200 is connected with the input end of the power supply line through a second circuit breaker, the external power supply source 300 is connected with the input end of the power supply line through a third circuit breaker, and the second circuit breaker or the third circuit breaker is used for being closed when another circuit breaker is disconnected, so as to control the second generator set or the external power supply source to input electric energy into the power supply line. That is, the second circuit breaker and the third circuit breaker may not be closed simultaneously, so as to avoid that the output voltages of the second power generator set 200 and the external power supply source 300 are not in accordance with the same period condition, and thus the power cannot be supplied normally, and therefore, the second circuit breaker may only be closed after the third circuit breaker is opened, and the third circuit breaker may only be closed after the second circuit breaker is opened, so as to ensure that only one of the second power generator set 200 and the external power supply source 300 supplies power to the load device 600 of the data center through the power supply line 400 together with the first power generator set.
In another embodiment of the present application, the grid-tie device further includes a first breaker, and thus the structure of the grid-tie device is as shown in fig. 3, including a rectifying module 510, an inverting module 520, a transforming module 530, and a first breaker Q1. The rectifying module 510 and the inverting module 520 may be controlled in a decoupling manner, for example, a set of rectifying circuit and an inverting circuit are respectively adopted, and no association relationship exists between the rectifying circuit and the inverting circuit, or the rectifying circuit and the inverting circuit may be realized in an integrated manner. The transformer module 530 may be an isolation transformer, and specific transformation parameters may be selected according to voltage levels on two sides to meet voltage requirements on two sides of the transformer module. The first circuit breaker is used for controlling on-off between the first generator set and the power supply line, when the first circuit breaker is disconnected, the first generator set is disconnected with the input end of the power supply line, otherwise, when the first circuit breaker is closed, the first generator set is communicated with the input end of the power supply line, and therefore grid-connected operation is achieved.
In an embodiment of the present application, the first circuit breaker is configured to open when a first switching condition is met and close when a second switching condition is met, wherein the first switching condition includes that the second circuit breaker and the third circuit breaker are both open, and the second switching condition includes that the second circuit breaker or the third circuit breaker is closed. Therefore, the interlocking design among the first circuit breaker, the second circuit breaker and the third circuit breaker is realized, namely when the grid-connected power supply system is switched between an external power supply source and the second generator set, the first generator set needs to be disconnected from the first circuit breaker to interrupt the grid-connected state, and after the switching is completed, the first circuit breaker is closed to re-enter the grid-connected state. During the whole operation process, the first generator set cannot independently supply power when other power supply sources (including an external power supply source or a second generator set) do not exist, and the first generator set is used for providing supplement for the other power supply sources.
FIG. 4 is a schematic diagram of a power supply system of a data center, in which an external power supply source is a power grid, the power grid is connected with an input end of a power supply line 400 through a third circuit breaker Q3, and a diesel generator set G1～GnAs a backup power source of the grid, the input end of the power supply line 400 is connected through a second breaker Q2. The power supply line can comprise a medium-voltage bus 410 and a low-voltage bus 420, wherein a transformer T is arranged between the medium-voltage bus 410 and the low-voltage bus 4201～TnAnd voltage conversion is realized. The medium-voltage bus and the low-voltage bus respectively refer to power supply lines with voltages in specified intervals, for example, in this embodiment, the voltage of the medium-voltage bus is 35KV, the voltage of the low-voltage bus is 1KV, and the diesel generator set G1～GnThe medium voltage bus is switched in by a second circuit breaker Q2. The load devices of the data center may include various servers, network connection devices, power distribution devices, environment conditioning devices, and the like, and are only represented by high-voltage direct current (HVDC) cabinets, head-of-line cabinets (HC), and the like.
In the scheme, a diesel generating set G1～GnThe second generator set is the second generator set, and the power is input to a power supply line through the medium-voltage busWhen the power supply is stopped, the diesel generator set G can be switched to only after the power supply of the power grid is stopped1～GnAnd supplying power. Therefore, when the power supply of the grid is limited, the diesel generator set G1～GnThe emergency power supply can only be switched as a standby power supply, and cannot be supplemented on the basis of power supply of a power grid, so that power supply of load equipment of the data center is interrupted, loss is caused, for example, a part of service servers are powered off, and service interruption is caused.
In addition, when the data center obtains power supply from an external power supply source such as a power grid, the data center has the maximum capacity of the power supply, and when the maximum capacity is exceeded, the data center triggers line protection of the power grid, so that the power supply of the power grid is cut off. Thus, during special extreme weather conditions that are outside of the design range, such as extreme summer heat with temperatures below the design value, the cooling power of the cooling equipment in the data center may rise significantly, which may result in the power requirements of the data center exceeding the maximum capacity that can be provided by the external power source. In the scheme of fig. 3, the diesel generating set G1～GnThe power supply can only be switched as a standby power supply, and the power supply can not be supplemented to supply power to load equipment of the data center together with the power grid, so that the condition that the power of the load exceeds the maximum capacity of the power grid can not be effectively guaranteed.
In practical situations, several diesel generators G are generally arranged as standby power supplies1～GnOf a diesel generator group G1～GnWhen a part of the generators are in failure, the generators can be replaced. For example, two diesel generators G may be providedn+1And Gn+2As diesel generator set G1～GnAnd these backup generators are switched from the grid to the diesel generator set G only when the power supply source of the power supply system is switched1～GnAnd the diesel generator set can be used only when a generator fails, so that the utilization rate of the diesel generator set is extremely low.
Comparing with the scheme of the power supply system shown in FIG. 45, in a grid-connected power supply system of a data center, a diesel generator set G is added, and the diesel generator set G is the first generator set and is connected with a medium-voltage bus 410 of a power supply line through a grid-connected device 500, wherein a first circuit breaker Q1 in the grid-connected device is used for controlling on/off between the diesel generator set G and the medium-voltage bus 410 of the power supply line. Because the grid-connected device can process the alternating current generated by the diesel generator set G, the frequency, the phase and the voltage of the output voltage of the grid-connected device are connected with a power grid or the diesel generator set G1～GnThe matching can be realized, and the synchronous conditions are met, so that the diesel generator set G can be directly operated in a grid-connected mode, and when the power supply power of a power grid is limited, the generated electric energy can be directly used as emergency supplement of the power grid, so that the condition of power supply interruption of load equipment of a data center can be avoided, and the possibility of service interruption is avoided. In addition, in the event of special extreme weather exceeding the design range, the electrical energy generated by the diesel generator set G can be used to supplement the abnormally increased load power, thus avoiding triggering the line protection as the grid reaches the maximum capacity of the power supply.
In consideration of practical situations, a backup generator with extremely low utilization rate is often present, such as the diesel generator Gn+1And Gn+2And the like. At this time, the diesel generator G may be usedn+1And Gn+2As the diesel generator set G for grid connection, the backup generator with extremely low utilization rate can be effectively utilized, and simultaneously, the power gap of an external power supply can be supplemented.
Fig. 6 shows another grid-connected power supply system of a data center, compared with the scheme in fig. 5, in the grid-connected power supply system, a diesel generator set G is connected with a low-voltage bus 420 of a power supply line through a grid-connected device 500, so that the scale of the power supply line corresponding to the diesel generator set G in grid-connected operation is smaller, and the diesel generator set G may only correspond to load equipment of a certain part of the data center, and therefore, the requirements on the scale of the diesel generator set G and the synchronous regulation capability of the grid-connected device are relatively lower, and the engineering implementation is easier.
In some embodiments of the present application, the inverter module of the grid-connected device is further configured to access the power supply line in parallel when the first generator set is not started, and perform power factor adjustment or harmonic compensation on the power supply line. For example, during daily operation, the first generator set may not be started, and the inverter module of the grid-connected device is connected in parallel to the power supply line and operates alone, and at this time, the inverter module may passively perform power factor adjustment or harmonic compensation on the power supply line, thereby realizing functions of harmonic compensation, power factor correction, and the like, and improving the power quality of the data center.
In addition, the neutral point of the first generator set is grounded in a high-resistance mode or is not grounded, and the neutral point is grounded in a high-resistance mode or is not grounded, so that a fault point cannot generate large short-circuit current when a fault occurs, the grid-connected power supply system is allowed to operate with the fault within a certain time, and the reliability of the operation of the system can be improved.
If the external power supply is a power grid, the power grid dispatching can be accepted under the condition of ensuring the power utilization safety of the data center according to the dispatching requirement of the power grid, the first generator set supplements power for the power grid or participates in frequency modulation, the peak-load and frequency-modulation subsidy is obtained, and the benefit of a data center grid-connected power supply system is increased.
To sum up, in the scheme provided by the embodiment of the application, the power supply system that is incorporated into the power networks includes first generator system and power supply line at least, the external power supply source is connected to the input of power supply line, data center's load equipment is connected to the output of power supply line, first generator system is connected with the input of power supply line through the device that is incorporated into the power networks, the device that is incorporated into the power networks includes rectifier module, contravariant module and transformation module, is used for respectively carrying out rectification, contravariant and transformation to the alternating current of first generator system output to make the alternating current of output accord with the contemporary condition. Therefore, the first generator set can provide supplement and support for the external power supply source, when the external power supply source is limited or the maximum capacity of the external power supply source is exceeded due to the rise of the load power of the data center, the difference of the power required by the load equipment can be supplemented, the reliability of the power supply system is improved, and the situations that the power failure of the data center occurs, the load equipment stops working and the like due to insufficient power supply or the triggering of the line protection of the external power supply source are avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (6)
1. A grid-connected power supply system of a data center comprises a first generator set and a power supply line, wherein the input end of the power supply line is connected with an external power supply source, the output end of the power supply line is connected with load equipment of the data center, the first generator set is connected with the input end of the power supply line through a grid-connected device, and the grid-connected device comprises a rectifying module, an inverting module and a voltage transformation module which are respectively used for rectifying, inverting and transforming alternating current output by the first generator set so that the output alternating current accords with a synchronous condition;
and the inverter module of the grid-connected device is also used for connecting the first generator set into the power supply line in parallel when not started, and carrying out power factor regulation or harmonic compensation on the power supply line.
2. The system of claim 1, further comprising a second power generation unit connected to the input of the power supply line via a second circuit breaker, and wherein the external power source is connected to the input of the power supply line via a third circuit breaker, and wherein the second or third circuit breaker is configured to close when the other circuit breaker is open to control the second power generation unit or the external power source to input power to the power supply line.
3. The system of claim 2, wherein the grid tie device further comprises a first circuit breaker, the first generator set being connected to the input of the power supply line through the first circuit breaker, the first circuit breaker being configured to open when a first switching condition is met and to close when a second switching condition is met, wherein the first switching condition comprises both the second circuit breaker and the third circuit breaker being open, and the second switching condition comprises either the second circuit breaker or the third circuit breaker being closed.
4. The system of claim 1, wherein the power supply line comprises a medium-voltage bus and a low-voltage bus, voltage transformation is achieved between the medium-voltage bus and the low-voltage bus through a transformer, and the first generator set is connected to the medium-voltage bus or the low-voltage bus of the power supply line through a grid-connected device.
5. The system of claim 1, wherein a neutral point of the first generator set is either high impedance grounded or ungrounded.
6. A grid tie device for a grid tie power supply system, wherein the grid tie device comprises:
the rectifying module is connected with the generator set for providing the alternating current and is used for rectifying the alternating current output by the generator set and outputting direct current;
the inversion module is connected with the output end of the rectification module and used for performing inversion processing on the direct current obtained by the arrangement processing and outputting alternating current, and when the generator set is not started, the inversion module is connected in parallel to a power supply line and performs power factor adjustment or harmonic compensation on the power supply line;
and the voltage transformation module is connected with the output end of the inversion module and used for carrying out voltage transformation on the alternating current obtained by inversion processing and outputting the alternating current meeting the synchronous condition to a power supply line of a grid-connected power supply system.
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| CN112103938A (en) * | 2020-10-10 | 2020-12-18 | 北京百度网讯科技有限公司 | Power supply architecture, method and system based on HVDC equipment |
| CN114471926A (en) * | 2021-12-16 | 2022-05-13 | 韶关核力重工机械有限公司 | Power supply intelligent control system and equipment for stone breaking and sand making |
| WO2023060704A1 (en) * | 2021-10-12 | 2023-04-20 | 烟台杰瑞石油装备技术有限公司 | Power supply system for well-site electric drive equipment |
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| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US12173594B2 (en) | 2019-06-13 | 2024-12-24 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing system |
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
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| CN112103938A (en) * | 2020-10-10 | 2020-12-18 | 北京百度网讯科技有限公司 | Power supply architecture, method and system based on HVDC equipment |
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| WO2023060704A1 (en) * | 2021-10-12 | 2023-04-20 | 烟台杰瑞石油装备技术有限公司 | Power supply system for well-site electric drive equipment |
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