CN217036752U - Transformer substation direct current power supply device and system connected with new energy - Google Patents
Transformer substation direct current power supply device and system connected with new energy Download PDFInfo
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- CN217036752U CN217036752U CN202220744510.XU CN202220744510U CN217036752U CN 217036752 U CN217036752 U CN 217036752U CN 202220744510 U CN202220744510 U CN 202220744510U CN 217036752 U CN217036752 U CN 217036752U
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Abstract
The utility model relates to the technical field of new energy, and discloses a transformer substation direct current power supply device and system connected with new energy. The device comprises a power conversion module, a boosting module, a filtering module, a charging module, a discharging module, a storage battery and a CPU module, wherein multiple electric energy is converted into a power supply with uniform voltage through the power conversion module, the power supply is converted into standard voltage through the boosting module to supply power to a load, the storage battery is charged through the charging module, the electric energy in the storage battery can be discharged through the discharging module to supply power to an alternating current/direct current load, and the CPU module is used for performing start-stop control on the power conversion module, the boosting module, the charging module and the discharging module according to the voltage of the storage battery; the device can be used as an independent module, and multiple modules can be connected in parallel according to the capacity of new energy or the size of an electric load. The utility model realizes mutual standby of various energy sources, improves the reliability of direct current power supply of the transformer substation, and realizes smooth grid connection and efficient utilization of new energy sources.
Description
Technical Field
The utility model relates to the technical field of new energy, in particular to a transformer substation direct current power supply device and system connected with new energy.
Background
The direct-current power supply of the transformer substation mainly supplies power for various devices in the transformer substation, such as a circuit breaker, a disconnecting link, a relay protection device, monitoring equipment and the like, and the operation reliability of the direct-current power supply of the transformer substation is very important for guaranteeing safe power supply.
At present, a series-connected battery is mainly used as a direct-current power supply for a transformer substation, or power is supplied based on new energy sources such as photovoltaic energy, solar energy and the like. However, when batteries connected in series are used as a dc power supply, the function of the whole battery pack is affected once a single battery fails. When power is supplied based on new energy, uncertain risks are easily brought to power supply reliability due to large power fluctuation of the new energy.
SUMMERY OF THE UTILITY MODEL
The utility model provides a transformer substation direct-current power supply device and system connected with new energy, and solves the technical problems that the existing transformer substation direct-current power supply mode is not high in reliability and can not realize smooth grid connection of the new energy.
The utility model provides a transformer substation direct-current power supply device accessed with new energy, which comprises a power conversion module, a boosting module, a filtering module, a charging module, a discharging module, a storage battery and a CPU module, wherein the boosting module is connected with the power conversion module; wherein:
the power conversion module, the boosting module and the filtering module are sequentially connected, and the output end of the filtering module is connected with a direct-current load; the power conversion module is used for converting input voltages of the commercial power module and the at least one new energy module into a uniform voltage; after the uniform voltage is boosted to a standard voltage by the boosting module, the direct current load is supplied with power by the filtering module;
the input end of the charging module is connected with the output end of the power conversion module, and the output end of the charging module is connected with the storage battery;
the input end of the discharging module is connected with the storage battery, and the output end of the discharging module is connected with the input end of the filtering module;
the CPU module is used for monitoring the voltage of the storage battery and controlling the power conversion module, the boosting module, the charging module and the discharging module to start and stop according to the voltage of the storage battery.
According to an implementable aspect of the first aspect of the present invention, the power conversion module is specifically configured to:
and converting the input voltage of the commercial power module and at least one new energy module into a direct current (48V) or direct current (24V) unified voltage.
According to an implementable aspect of the first aspect of the present invention, the power conversion module includes:
the first AC/DC converter is connected with the commercial power module through an alternating current branch;
a second AC/DC converter and/or a first DC/DC converter; the second AC/DC converter is connected with the wind power generation module; the first DC/DC converter is connected with the photovoltaic power generation module.
According to an implementable aspect of the first aspect of the present invention, the boost module includes:
a second DC/DC converter for boosting the unified voltage to either DC 110V or DC 220V.
According to an implementable manner of the first aspect of the present invention, the charging module includes:
a third DC/DC converter for converting the unified voltage to a 12V voltage.
According to an implementable manner of the first aspect of the present invention, the discharge module includes:
and the fourth DC/DC converter is used for converting the voltage of the storage battery into the voltage of direct current 110V or direct current 220V.
According to one possible implementation form of the first aspect of the utility model, the apparatus further comprises:
the input end of the internet module is connected with the storage battery, and the output end of the internet module is connected with an alternating current load; the internet module is used for converting the voltage of the storage battery into alternating current 220V.
According to a manner that can be implemented in the first aspect of the present invention, the internet access module includes:
a DC/AC converter.
The second aspect of the present invention provides a dc power supply system of a substation accessing new energy, including:
a direct current load;
an AC load;
a mains supply module;
a new energy module;
and at least one substation direct current power supply device which is connected with the new energy in any one mode.
According to an implementable aspect of the second aspect of the present invention, when there are a plurality of the substation dc power supply devices, the substation dc power supply devices are connected in parallel.
According to the technical scheme, the utility model has the following advantages:
the device comprises a power conversion module, a boosting module, a filtering module, a charging module, a discharging module, a storage battery and a CPU module, wherein multiple electric energy is converted into a power supply with uniform voltage through the power conversion module, the power supply is converted into standard voltage through the boosting module to supply power to a load, the storage battery is charged through the charging module, the electric energy in the storage battery can be discharged through the discharging module to supply power to an alternating current/direct current load, and the CPU module is used for performing start-stop control on the power conversion module, the boosting module, the charging module and the discharging module according to the voltage of the storage battery; the device can be used as an independent module, and can be used for carrying out multi-module parallel connection according to the capacity of new energy or the size of an electric load so as to construct a transformer substation direct-current power supply system accessed with new energy; the utility model realizes mutual standby of various energy sources, improves the reliability of direct current power supply of the transformer substation, and realizes smooth grid connection and efficient utilization of new energy sources by storing energy by using the storage battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and 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 these drawings without inventive exercise.
Fig. 1 is a structural connection block diagram of a dc power supply apparatus of a substation accessing new energy according to an alternative embodiment of the present invention;
fig. 2 is a schematic view of an application scenario of a dc power supply apparatus of a substation according to an alternative embodiment of the present invention;
fig. 3 is a schematic diagram of a substation dc power supply system accessing new energy according to an alternative embodiment of the present invention.
Reference numerals:
1-a power conversion module; 2-a boost module; 3-a filtering module; 4-a charging module; 5-a discharge module; 6-a storage battery; 7-a CPU module; 8-a network access module; 11-a first AC/DC converter; 12-a second AC/DC converter; 13-a first DC/DC converter; r1 — dc load; r2-ac load; y1-mains module; y2-wind power generation module; y3-photovoltaic power generation module.
The first AC/DC converter is connected with the commercial power module Y1 through an alternating current branch;
a second AC/DC converter connected to the wind power generation module Y2;
and a first DC/DC converter connected to the photovoltaic power generation module Y3.
In a specific implementation manner, the boost module 2 includes:
second DC/DC converter
Detailed Description
The embodiment of the utility model provides a transformer substation direct-current power supply device and system accessed with new energy, and aims to solve the technical problems that the existing transformer substation direct-current power supply mode is not high in reliability and can not realize smooth grid connection of the new energy.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The utility model provides a transformer substation direct current power supply device connected with new energy.
Referring to fig. 1, fig. 1 is a schematic structural diagram illustrating a dc power supply device of a substation, which is accessed to new energy according to an embodiment of the present invention.
The embodiment of the utility model provides a transformer substation direct current power supply device accessed with new energy, which comprises a power conversion module 1, a boosting module 2, a filtering module 3, a charging module 4, a discharging module 5, a storage battery 6 and a CPU module 7; the power conversion module 1, the boost module 2 and the filter module 3 are sequentially connected, the input end of the charging module 4 is connected with the output end of the power conversion module 1, and the output end of the charging module 4 is connected with the storage battery 6; the input end of the discharging module 5 is connected with the storage battery 6, and the output end of the discharging module 5 is connected with the input end of the filtering module 3.
The power conversion module 1 is used for converting the input voltages of the commercial power module Y1 and at least one new energy module into a uniform voltage; after the uniform voltage is boosted to the standard voltage by the boosting module 2, the power is supplied to the direct current load R1 by the filtering module 3. Meanwhile, the unified voltage charges the storage battery 6 through the charging module 4, and the current in the storage battery 6 can also be discharged through the discharging module 5 and supplies power to the alternating current/direct current load R1.
The CPU module 7 is configured to monitor the voltage of the storage battery 6, and perform start-stop control on the power conversion module 1, the boost module 2, the charge module 4, and the discharge module 5 according to the voltage of the storage battery 6. Through this CPU module 7, can realize carrying out the utilization of new forms of energy according to actual need, improve the flexibility of supplying power.
In an implementable manner, the power conversion module 1 is specifically configured to:
and converting the input voltage of the commercial power module Y1 and the at least one new energy module into a uniform voltage of direct current 48V or direct current 24V.
The new energy module can be a plurality of photovoltaic cells or a plurality of wind driven generators or a combination of a plurality of photovoltaic cells and wind driven generators. The embodiment of the utility model does not limit the specific type of the new energy module.
As shown in fig. 2, the dc power supply device of the substation according to the embodiment of the present invention includes two new energy modules, which are a wind power generation module Y2 and a photovoltaic power generation module Y3. In order to utilize the electric power of the wind power generation module Y2 and the photovoltaic power generation module Y3, the power conversion module 1 includes:
a first AC/DC converter 11 connected to the utility power module Y1 through an AC branch;
a second AC/DC converter 12 connected to the wind power generation module Y2;
and a first DC/DC converter 13 connected to the photovoltaic power generation module Y3.
In order to realize the communication with each module, the CPU module is connected with a communication CAN/RS485 circuit.
In a specific implementation manner, the boost module 2 includes:
a second DC/DC converter for boosting the uniform voltage to either DC 110V or DC 220V.
The charging module 4 includes:
a third DC/DC converter for converting the uniform voltage to a 12V voltage.
The discharge module 5 includes:
and a fourth DC/DC converter for converting the voltage of the battery 6 into a direct current of 110V or 220V.
Further, the apparatus further comprises:
the input end of the internet module 8 is connected with the storage battery 6, and the output end of the internet module is connected with an alternating current load R2; the internet module 8 is configured to convert the voltage of the storage battery 6 into an alternating current 220V.
In an implementation manner, the internet access module 8 includes a DC/AC converter.
According to the embodiment of the utility model, mutual standby of various energy sources is realized, the reliability of direct current power supply of the transformer substation is improved, and the storage battery 6 is utilized for energy storage, so that smooth grid connection and efficient utilization of new energy sources are realized.
The utility model also provides a transformer substation direct current power supply system accessed with the new energy.
The embodiment of the utility model provides a transformer substation direct current power supply system accessed with new energy, which comprises:
a dc load R1;
an AC load R2;
a mains supply module Y1;
a new energy module;
and at least one substation direct current power supply device which is connected with the new energy in any one of the above-mentioned modes.
The new energy module can be any type of new energy supply equipment, such as photovoltaic power generation equipment, wind power generation equipment and the like.
As shown in fig. 3, the system has two new energy modules, namely a photovoltaic power generation module Y3 and a wind power generation module Y2. The number of the direct-current power supply devices of the transformer substation can be determined according to the new energy capacity or the size of the electric load, and the direct-current power supply devices of the transformer substation are connected in parallel as shown in fig. 3.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A transformer substation direct current power supply device connected with new energy is characterized by comprising a power conversion module, a boosting module, a filtering module, a charging module, a discharging module, a storage battery and a CPU module; wherein:
the power conversion module, the boosting module and the filtering module are sequentially connected, and the output end of the filtering module is connected with a direct-current load; the power conversion module is used for converting the input voltages of the commercial power module and the at least one new energy module into a uniform voltage; after the uniform voltage is boosted to a standard voltage by the boosting module, the direct current load is supplied with power by the filtering module;
the input end of the charging module is connected with the output end of the power conversion module, and the output end of the charging module is connected with the storage battery;
the input end of the discharging module is connected with the storage battery, and the output end of the discharging module is connected with the input end of the filtering module;
the CPU module is used for monitoring the voltage of the storage battery and controlling the power conversion module, the boosting module, the charging module and the discharging module to start and stop according to the voltage of the storage battery.
2. The substation direct-current power supply device accessed to the new energy source according to claim 1, wherein the power conversion module is specifically configured to:
and converting the input voltage of the commercial power module and the at least one new energy module into a direct current (48V) or direct current (24V) unified voltage.
3. The substation direct current power supply device connected to new energy according to claim 2, wherein the power conversion module comprises:
the first AC/DC converter is connected with the commercial power module through an alternating current branch;
a second AC/DC converter and/or a first DC/DC converter; the second AC/DC converter is connected with the wind power generation module; the first DC/DC converter is connected with the photovoltaic power generation module.
4. The substation direct-current power supply device accessed to the new energy source according to claim 1, wherein the boosting module comprises:
a second DC/DC converter for boosting the unified voltage to either DC 110V or DC 220V.
5. The substation direct-current power supply device accessed to the new energy source according to claim 1, wherein the charging module comprises:
a third DC/DC converter for converting the unified voltage to a 12V voltage.
6. The substation direct current power supply device connected to new energy according to claim 1, wherein the discharging module comprises:
and the fourth DC/DC converter is used for converting the voltage of the storage battery into the voltage of direct current 110V or direct current 220V.
7. The substation direct-current power supply device connected to the new energy source according to claim 1, further comprising:
the input end of the internet module is connected with the storage battery, and the output end of the internet module is connected with an alternating current load; the internet module is used for converting the voltage of the storage battery into alternating current 220V.
8. The substation direct current power supply device of access new forms of energy of claim 7, characterized in that, the networking module includes:
a DC/AC converter.
9. The utility model provides an insert new forms of energy's direct current power supply system of transformer substation which characterized in that includes:
a direct current load;
an AC load;
a mains supply module;
a new energy module;
and at least one substation direct current power supply device with new energy source access according to any one of claims 1-8.
10. The new energy source-connected substation direct-current power supply system according to claim 9, wherein when there are a plurality of substation direct-current power supply devices, the substation direct-current power supply devices are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220744510.XU CN217036752U (en) | 2022-04-01 | 2022-04-01 | Transformer substation direct current power supply device and system connected with new energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220744510.XU CN217036752U (en) | 2022-04-01 | 2022-04-01 | Transformer substation direct current power supply device and system connected with new energy |
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| Publication Number | Publication Date |
|---|---|
| CN217036752U true CN217036752U (en) | 2022-07-22 |
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| CN202220744510.XU Active CN217036752U (en) | 2022-04-01 | 2022-04-01 | Transformer substation direct current power supply device and system connected with new energy |
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| CN (1) | CN217036752U (en) |
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- 2022-04-01 CN CN202220744510.XU patent/CN217036752U/en active Active
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