CN210380253U - Multifunctional online transformer substation direct-current bus voltage loss prevention system - Google Patents
Multifunctional online transformer substation direct-current bus voltage loss prevention system Download PDFInfo
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- CN210380253U CN210380253U CN201921881907.8U CN201921881907U CN210380253U CN 210380253 U CN210380253 U CN 210380253U CN 201921881907 U CN201921881907 U CN 201921881907U CN 210380253 U CN210380253 U CN 210380253U
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Abstract
The utility model relates to a power equipment technical field specifically discloses a multi-functional online transformer substation direct current bus voltage loss prevention system, include: the direct current bus is used for providing direct current; the direct current emergency module comprises a lithium battery pack, and an output terminal of the lithium battery pack is electrically connected with the direct current bus; the output terminal of the self-starting generator is electrically connected with the direct current bus; and the controller module is respectively electrically connected with the direct current bus, the direct current emergency module and the self-starting generator and is used for detecting the voltage of the direct current bus, detecting the voltage of the lithium battery pack and controlling the input and the exit of the direct current emergency module and the self-starting generator. The utility model provides a multi-functional online transformer substation direct current generating line voltage loss prevention system even if under the condition that current power all disappears, still can ensure direct current generating line and continue the operation, until troubleshooting and the normal operating condition who resumes direct current generating line.
Description
Technical Field
The utility model relates to a power equipment technical field especially relates to a multi-functional online transformer substation direct current bus anti-decompression system.
Background
The direct current system of the transformer substation is necessary power supply equipment of the transformer substation, and the control, protection, energy storage, locking, signal loop, emergency lighting and the like of primary power equipment in the transformer substation are powered by direct current. A direct current system of the existing transformer substation mainly comprises a direct current bus, a charger, a storage battery pack, a monitoring module and the like. When the direct current system normally operates, the charger, the storage battery pack and each direct current feeder line are connected to a direct current bus, alternating current for a 400V station is rectified into direct current through a rectifying circuit of the charger, so that power is supplied to the loops, and the storage battery pack is charged at regular time. The purpose of using the storage battery in the direct current system is to release the stored electric quantity to maintain the power supply of direct current loops such as protection, energy storage, locking, signals and the like through the storage battery when the alternating current power supply for the substation disappears caused by accidents in the substation, and ensure that primary equipment in the substation can normally run for several hours.
Whether the storage battery is normal or not is related to the normal operation of the direct current system. The state of the storage battery can be judged by means of checking the capacity of the storage battery through periodic checking discharge, periodic maintenance and inspection of substation operators and the like, but based on the detection means, the condition that the storage battery is connected onto the direct current bus in a virtual mode due to the fault of a specific storage battery cannot be avoided.
In general, the dc bus may not only cause voltage loss due to the battery problem, but also cause power supply loss due to misoperation of the dc system by personnel.
Therefore, the existing dc bus power supply system has the following hidden troubles:
the voltage and current of the direct current bus of the transformer substation are normally provided by rectifying alternating current for station by a charger, when the station power consumption is lost, the voltage of the direct current bus is maintained by the electric energy released and stored by a storage battery, if the storage battery is connected to the direct current bus in a virtual mode for various reasons, once the station power consumption is lost, the storage battery cannot play a role. In addition, there is a risk that the dc bus may lose voltage during manual switching of the incoming power supply. The power supply of the direct current bus depends on mutual cooperation of station power consumption and a storage battery, and when the station power consumption and the storage battery are lost, the voltage is lost, so that risks are brought to stable operation of a transformer substation, and the prior art lacks a backup means for preventing the station power consumption and the storage battery from being lost together and ensuring the continuous operation of the direct current bus.
Therefore, a third power supply needs to be provided for the dc bus, so that even if the existing power supplies are all lost, the dc bus can still be ensured to continue to operate until the fault is eliminated and the normal operation state of the dc bus is recovered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multi-functional online transformer substation direct current generating line voltage loss prevention system, even if under the condition that current power all disappears, still can ensure direct current generating line continuous operation, until troubleshooting and resume direct current generating line's normal operating condition.
For reaching above purpose, the utility model provides a multi-functional online transformer substation direct current bus prevents decompression system, include:
the direct current bus is used for providing direct current;
the direct current emergency module comprises a lithium battery pack, and an output terminal of the lithium battery pack is electrically connected with the direct current bus;
the output terminal of the self-starting generator is electrically connected with the direct current bus;
and the controller module is respectively electrically connected with the direct current bus, the direct current emergency module and the self-starting generator and is used for detecting the voltage of the direct current bus, detecting the voltage of the lithium battery pack and controlling the input and the exit of the direct current emergency module and the self-starting generator.
Preferably, the lithium ion battery pack further comprises a first switch K1 and a second switch K2, wherein the lithium ion battery pack, the first switch K1, the second switch K2 and the direct current bus are connected in series.
Preferably, an access point is provided between the first switch K1 and the second switch K2, and the output terminal of the self-starting generator is electrically connected to the access point.
Preferably, an alternating current-direct current conversion module is further arranged between the self-starting generator and the access point, and is used for converting alternating current generated by the self-starting generator into direct current used by the direct current bus.
Preferably, the method further comprises the following steps:
and a station ac line electrically connected to the input terminal of the lithium battery pack and the output terminal of the self-starting generator, respectively.
Preferably, a third switch K3 is further disposed between the station ac line and the lithium battery pack, and the third switch K3 is electrically connected to the controller module and is controlled by the controller module to open and close.
Preferably, the self-starting generator is provided with a power switch K4, and the power switch K4 is electrically connected with the controller module and is controlled by the controller module to open and close.
Preferably, the method further comprises the following steps:
the casing, casing fixed mounting have operating condition pilot lamp, be used for with generator input interface, the DC power supply interface, group battery voltage display screen, group battery operating condition display screen, charger and the battery case that are used for being connected with direct current bus electricity that the output terminal of self-starting generator is connected.
The beneficial effects of the utility model reside in that: the controller module monitors the voltage of the direct current bus in real time, enters an emergency power supply state when the direct current bus is out of power due to the fact that an original storage battery cannot supply power to the direct current bus, and controls the lithium battery pack to supply power to the direct current bus if the voltage of the lithium battery pack is high, wherein the emergency power supply state is a state that the electric quantity of the lithium battery pack is sufficient; because the electric capacity of lithium cell group is limited, after a period of time, when the controller module detects that lithium cell group voltage is lower, start the self-starting generator, then supply power to direct current bus by the self-starting generator this moment, can break off the connection between lithium cell and the direct current bus afterwards. The utility model provides a decompression system is prevented to multi-functional online transformer substation direct current generating line not only can solve because the direct current generating line that battery and direct current generating line virtual meet lead to loses the electric problem, still can provide longer electric quantity supply time for direct current generating line to for fortune dimension personnel provide more sufficient maintenance time, even if under the condition that current power all disappears, still can ensure direct current generating line and continue the operation, until troubleshooting and resume direct current generating line's normal operating condition. In the whole emergency power supply process, if the power loss fault of the direct current bus is detected to be repaired, the original power supply is recovered to be normal, and the power supply loop of the lithium battery pack or the self-starting generator can be disconnected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a block diagram of a dc bus voltage loss prevention system of a multifunctional online substation according to an embodiment;
FIG. 2 is a schematic external view of a housing provided in an embodiment;
fig. 3 is a schematic structural diagram of a lithium battery pack according to an embodiment.
In the figure:
1. a direct current bus; 2. a lithium battery pack; 3. a self-starting generator; 4. a controller module; 5. an AC-DC conversion module; 6. an AC line for a station; 7. a housing; 8. a working state indicator light; 9. a generator input interface; 10. a DC power supply interface; 11. a battery pack voltage display screen; 12. a battery pack working state display screen; 13. a charger.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 to 3, the embodiment provides a multifunctional online substation direct current bus voltage loss prevention system, which includes a direct current bus 1, a direct current emergency module, a self-starting generator 3, and a controller module 4. The dc bus 1 is used to provide dc power. The direct current emergency module comprises a lithium battery pack 2, and an output terminal of the lithium battery pack 2 is electrically connected with the direct current bus 1. The output terminal of the self-starting generator 3 is electrically connected to the dc bus 1. The controller module 4 is respectively electrically connected with the direct current bus 1, the direct current emergency module and the self-starting generator 3 and is used for detecting the voltage of the direct current bus 1, detecting the voltage of the lithium battery pack 2 and controlling the input and the exit of the direct current emergency module and the self-starting generator 3.
Specifically, the controller module 4 monitors the voltage of the direct current bus 1 in real time, when the direct current bus 1 loses power due to the fact that the original storage battery cannot supply power to the direct current bus 1, the emergency power supply state is entered, if the voltage of the lithium battery pack 2 is high, it is indicated that the electric quantity of the lithium battery pack 2 is sufficient, and the controller module 4 controls the lithium battery pack 2 to supply power to the direct current bus 1; because the electric capacity of the lithium battery pack 2 is limited, after a period of time, when the controller module 4 detects that the voltage of the lithium battery pack 2 is low, the self-starting generator 3 is started, at the moment, the automatic starting generator supplies power to the direct current bus 1, and then the connection between the lithium battery and the direct current bus 1 can be disconnected. The utility model provides a multi-functional online transformer substation direct current generating line decompression system of preventing not only can solve because direct current generating line 1 that battery and direct current generating line 1 virtual meet lead to loses the electric problem, still can provide longer electric quantity supply time for direct current generating line 1 to for fortune dimension personnel provide more sufficient maintenance time, even if under the condition that current power all disappears, still can ensure direct current generating line 1 and continue the operation, until troubleshooting and resume direct current generating line 1's normal operating condition. In the whole emergency power supply process, if the power loss fault of the direct current bus 1 is detected to be repaired, the original power supply is recovered to be normal, and then the power supply loop of the lithium battery pack 2 or the self-starting generator 3 can be disconnected.
In this embodiment, the multifunctional online substation direct-current bus voltage loss prevention system is characterized by further comprising a first switch K1 and a second switch K2, wherein the lithium battery pack 2, the first switch K1, the second switch K2 and the direct-current bus 1 are connected in series. It will be appreciated that when using the lithium battery pack 2 for power, it is necessary to close both the first switch K1 and the second switch K2.
Optionally, an access point is provided between the first switch K1 and the second switch K2, and the output terminal of the self-starting generator 3 is electrically connected to the access point.
Specifically, when the self-starting generator 3 is used to supply power to the dc bus 1, the connection between the lithium battery pack 2 and the dc bus 1 can be disconnected by disconnecting the first switch K1. The second switch K2 is turned off, so that the power supply circuit of the lithium battery pack 2 and the self-starting generator 3 can be simultaneously cut off.
In this embodiment, an ac/dc conversion module 5 is further disposed between the self-starting generator 3 and the access point, and is configured to convert ac power generated by the self-starting generator 3 into dc power that can be used by the dc bus 1.
The multifunctional online transformer substation direct-current bus voltage loss prevention system further comprises a station alternating-current circuit 6, wherein the station alternating-current circuit 6 is respectively electrically connected with the input terminal of the lithium battery pack 2 and the output terminal of the self-starting generator 3. Further, a third switch K3 is further disposed between the station ac line 6 and the lithium battery pack 2, and the third switch K3 is electrically connected to the controller module 4 and is controlled by the controller module 4 to open and close.
Generally, the controller module 4 continuously monitors the voltage of the lithium battery pack 2, and when the dc bus 1 is not in a voltage loss state, if it is detected that the electric quantity of the lithium battery pack 2 is lower than a preset value, for example, 80%, the third switch K3 is immediately closed, and the lithium battery pack 2 is charged by the station ac line 6, so as to ensure that the lithium battery pack 2 has sufficient electric quantity when the dc bus 1 is in a voltage loss state. The self-starting generator 3 may directly supply power to the station ac line 6 to cope with a short-time power failure of the station ac line 6.
Optionally, the self-starting generator 3 is provided with a power switch K4, and the power switch K4 is electrically connected to the controller module 4 and is controlled by the controller module 4 to open and close.
The multifunctional online transformer substation direct-current bus voltage loss prevention system further comprises a shell 7, wherein the shell 7 is fixedly provided with a working state indicator lamp 8, a generator input interface 9 connected with an output terminal of the self-starting generator 3, a direct-current power supply interface 10 electrically connected with the direct-current bus 1, a battery pack voltage display screen 11, a battery pack working state display screen 12, a charger 13 and a battery box.
Specifically, the self-starting generator 3 may be an independent body, and the rest components may be all installed in the housing 7 to form another independent body, and in use, a cable is required to connect the output terminal of the self-starting generator 3 and the generator input interface 9 on the housing 7, and another cable is required to connect the dc bus 1 and the dc power supply interface 10.
Preferably, the charger 13 is provided with a wiring copper bar or a wiring terminal for connecting with the station ac line 6.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
Claims (8)
1. The utility model provides a multi-functional online transformer substation direct current bus voltage loss prevention system which characterized in that includes:
the direct current bus is used for providing direct current;
the direct current emergency module comprises a lithium battery pack, and an output terminal of the lithium battery pack is electrically connected with the direct current bus;
the output terminal of the self-starting generator is electrically connected with the direct current bus;
and the controller module is respectively electrically connected with the direct current bus, the direct current emergency module and the self-starting generator and is used for detecting the voltage of the direct current bus, detecting the voltage of the lithium battery pack and controlling the input and the exit of the direct current emergency module and the self-starting generator.
2. The multifunctional online substation direct current bus voltage loss prevention system according to claim 1, further comprising a first switch K1 and a second switch K2, wherein the lithium battery pack, the first switch K1, the second switch K2 and the direct current bus are connected in series.
3. The multifunctional online substation direct current bus voltage loss prevention system according to claim 2, wherein an access point is provided between the first switch K1 and the second switch K2, and the output terminal of the self-starting generator is electrically connected with the access point.
4. The system of claim 3, wherein an AC/DC conversion module is further disposed between the self-starting generator and the access point, and is configured to convert AC power generated by the self-starting generator into DC power usable by the DC bus.
5. The multifunctional online substation direct current bus voltage loss prevention system of claim 1, further comprising:
and a station ac line electrically connected to the input terminal of the lithium battery pack and the output terminal of the self-starting generator, respectively.
6. The multifunctional online substation direct-current bus voltage loss prevention system according to claim 5, wherein a third switch K3 is further provided between the substation alternating-current line and the lithium battery pack, and the third switch K3 is electrically connected with the controller module and controlled by the controller module to open and close.
7. The multifunctional online substation direct-current bus voltage loss prevention system according to claim 1, wherein the self-starting generator is provided with a power switch K4, and the power switch K4 is electrically connected with the controller module and controlled by the controller module to open and close.
8. The multifunctional online substation direct current bus voltage loss prevention system of claim 1, further comprising:
the casing, casing fixed mounting have operating condition pilot lamp, be used for with generator input interface, the DC power supply interface, group battery voltage display screen, group battery operating condition display screen, charger and the battery case that are used for being connected with direct current bus electricity that the output terminal of self-starting generator is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921881907.8U CN210380253U (en) | 2019-11-04 | 2019-11-04 | Multifunctional online transformer substation direct-current bus voltage loss prevention system |
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| CN201921881907.8U CN210380253U (en) | 2019-11-04 | 2019-11-04 | Multifunctional online transformer substation direct-current bus voltage loss prevention system |
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| CN210380253U true CN210380253U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471950A (en) * | 2021-08-03 | 2021-10-01 | 国网四川省电力公司电力科学研究院 | Storage battery pack fault self-healing system and method for power plant station |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471950A (en) * | 2021-08-03 | 2021-10-01 | 国网四川省电力公司电力科学研究院 | Storage battery pack fault self-healing system and method for power plant station |
| CN113471950B (en) * | 2021-08-03 | 2023-09-26 | 国网四川省电力公司电力科学研究院 | Storage battery fault self-healing system and method for power plant station |
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