CN210273591U - Mixed type direct current power supply device for transformer substation - Google Patents
Mixed type direct current power supply device for transformer substation Download PDFInfo
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- CN210273591U CN210273591U CN201921166137.9U CN201921166137U CN210273591U CN 210273591 U CN210273591 U CN 210273591U CN 201921166137 U CN201921166137 U CN 201921166137U CN 210273591 U CN210273591 U CN 210273591U
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Abstract
The utility model discloses a transformer substation uses mixed type DC power supply device. The accumulator battery is a common battery pack (4) formed by connecting a counter current assembly (41) and an accumulator assembly (42) in series, the input end of the common battery pack is electrically connected with the output end of a charging component (6), the output end of the common battery pack (4) is electrically connected with a communication power supply (2), the input end of the charging component (6) is electrically connected with an alternating current power supply (ABC), the output end of the common battery pack (4) is electrically connected with the input end of a current converting component (7) formed by a rectifying assembly and a direct current boosting assembly, the output end of the current converting component (7) is electrically connected with an electric power operation power supply (1), the input end of the rectifying assembly is electrically connected with the alternating current power supply (ABC. The device has simple structure and convenient operation and maintenance, and is extremely easy to be widely and commercially applied to various power plants and transformer substations in China for popularization and use as a control power supply.
Description
Technical Field
The utility model relates to a DC power supply device, especially a mixed type DC power supply device is used to transformer substation.
Background
In various power plants and substations in China, power supplies for control, signal, protection, automation devices and certain operation execution mechanisms are generally called control power supplies, and the control power supplies are divided into two types: the first is a direct current power supply, and the second is an alternating current power supply. The direct current power supply is independent of the alternating current power supply system, is not influenced by the accident of the alternating current power supply system, has the characteristics of safety, reliability, convenience in operation and maintenance and the like, and is widely applied.
Currently, a dc power supply of a substation is divided into an 220/110V power operation power supply and a 48V communication power supply. The equipment for forming the two power supplies comprises a system monitoring part, a charging part, a series storage battery pack and a feed circuit, wherein the series storage battery pack is formed by connecting storage batteries with single voltage of 2V or 12V in series. Because the storage battery packs in the electric power operation power supply and the communication power supply are independently equipped, two sets of direct-current power supply equipment need to be maintained, so that the cost of operation and maintenance management is very high. Especially, the number of the storage batteries connected in series in the power operation power supply is large, so that the voltage imbalance of the single storage batteries is more likely to occur, and further, the long-term overcharge and over-discharge of the storage batteries are caused, and the service life of the whole storage battery is seriously influenced. Once a certain storage battery fails, the whole storage battery pack cannot play a due role, and sometimes even the whole group of storage batteries needs to be replaced, so that unnecessary waste is caused. In order to ensure the reliability of direct current power supply, national grid companies require that a check discharge test is performed on storage batteries regularly, the storage batteries with lagging voltage are replaced, and then the storage battery pack needs to be separated from a direct current bus to perform the discharge test. For substations of 110kV and below, only one group of storage batteries is mostly configured, and the storage battery pack is separated from a direct current bus, so that great hidden danger is brought to the operation safety of a power system.
In order to solve the problem that a whole set of storage batteries cannot be loaded due to the abnormality of a single storage battery in a single set of direct-current power supply, people make beneficial attempts and efforts, such as articles entitled "application and research of a 220kV transformer substation parallel direct-current power supply", academic of the ninejiang academy (natural science edition) "pages 29-31 and 42 in 3 rd year in 2018. The parallel direct-current power supply mentioned in the article is formed by connecting high-voltage output ends of a plurality of parallel battery modules in parallel, wherein each battery module is independently provided with a 12V storage battery; when the battery module is used, the AC220V alternating current power supply and the 12V storage battery are connected to the battery module at the same time, and when the alternating current is lost, the 12V voltage of the storage battery is boosted to DC220/110V by the battery module. Firstly, the number of the storage batteries is still the same as that of the traditional scheme and is not reduced, but the number of the battery modules with intelligent monitoring and charging functions needs to be matched with the number of the storage batteries, and because the price of a single battery module is far higher than that of a single storage battery, the manufacturing cost of the whole direct-current power supply is greatly increased, and the direct-current power supply is not economical; secondly, the battery module with both charging and boosting functions is a high-power device which needs to raise 12V to 220/110V, and the numerous battery modules also bring new problems to the screen assembly installation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the weak point among the prior art, provide a simple structure, fortune dimension convenient mixed type DC power supply unit for transformer substation.
For solving the technical problem of the utility model, the technical scheme who adopts does, and the transformer substation is connected alternating current power supply, electric power operating power supply and communication power supply's charging part and storage battery, especially including electricity with mixed type direct current power supply device:
the device also comprises a current transformation component consisting of a rectification component and a direct current boosting component;
the storage battery pack is a common battery pack which is formed by connecting a counter-current component and an electric storage component in series, the input end of the common battery pack is electrically connected with the output end of the charging component, and the output end of the common battery pack is electrically connected with a communication power supply;
the input end of the charging component is electrically connected with an alternating current power supply, and the output end of the charging component is electrically connected with the input end of the common battery pack;
the output end of the current transformation component is electrically connected with an electric power operation power supply, the input end of the rectification component is electrically connected with an alternating current power supply, and the input end of the direct current boosting component is electrically connected with the output end of the common battery pack.
The hybrid direct-current power supply device for the transformer substation is further improved as follows:
preferably, the electricity storage module is composed of 4-by-12V batteries or 24-by-2V batteries connected in series.
Preferably, the shared battery packs are arranged in parallel connection in more than two groups; not only is the capacity expansion easy, but also the operation and maintenance are convenient.
Preferably, the charging components are more than two in parallel connection; is beneficial to capacity expansion and operation and maintenance.
Preferably, more than two current transformation components are connected in parallel; is beneficial to capacity expansion and operation and maintenance.
Preferably, the direct current boosting assembly is a DC/DC booster.
Preferably, a three-phase alternating current voltage sensor is arranged on the alternating current power supply.
Preferably, the output end of the three-phase alternating voltage sensor is electrically connected with the input end of the monitoring part; the working state of the alternating current power supply can be conveniently known and displayed in time.
Compared with the prior art, the beneficial effects are that:
after adopting such structure, both simplified the structure of device widely, can maintain and change the battery in the device conveniently again, stopped storage battery and broken away from the problem that direct current bus brought huge hidden danger for electric power system's operation safety, still very big reduction the manufacturing cost of device, especially can provide 48V's communication power supply, thereby make the utility model discloses can provide electric power operation power and communication power supply just simultaneously based on one set of group battery. The very simple structure makes the utility model has high cost performance, and the utility model is very easy to be widely applied to various power plants and transformer substations in China in a commercial way for popularization and use as a control power supply.
Drawings
Fig. 1 is a schematic diagram of a basic circuit structure of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the hybrid dc power supply device for a substation is configured as follows:
a storage battery pack, a charging part 6 and a current converting part 7 are electrically connected between the alternating current power supply ABC, the power operation power supply 1 and the communication power supply 2. Wherein the content of the first and second substances,
the accumulator battery is a common battery pack 4 formed by connecting a counter current assembly 41 and an electric storage assembly 42 in series, the input end of the common battery pack 4 is electrically connected with the output end of the charging component 6, and the output end of the common battery pack 4 is electrically connected with the communication power supply 2; the electric storage module 42 is formed by connecting 4-12V batteries (or 24-2V batteries) in series, and the common battery pack 4 is provided in two groups (or more than two groups) in parallel.
The charging component 6 is one (or more than two charging components can be connected in parallel), the input end of the charging component 6 is electrically connected with the alternating current power supply ABC, and the output end of the charging component 6 is electrically connected with the input end of the shared battery pack 4.
The output end of a current transformation component 7 consisting of a rectifying component and a direct current boosting component is electrically connected with the electric power operation power supply 1, the input end of the rectifying component is electrically connected with an alternating current power supply ABC, and the input end of the direct current boosting component is electrically connected with the output end of the common battery pack 4; the converter component 7 is one (or more than two components can be connected in parallel), and the direct current boosting assembly is a DC/DC booster.
A three-phase alternating voltage sensor 5 is arranged on the alternating current power supply ABC, and an output end of the three-phase alternating voltage sensor 5 is electrically connected with an input end of the monitoring part 3.
During the installation, only need earlier according to the utility model discloses be applied to the electric parameter that voltage class and required capacity in the electric power system selected each components and parts, will again the utility model discloses alternating current power supply ABC's three input contact A, B, C is connected with electric power system's A looks, B looks, C looks electricity respectively to and electric power operating power 1 and communication power supply 2 and in-service use electric power operating power and communication power supply electricity be connected can.
In the operation process of the utility model, when the alternating current power supply ABC is electrified, the electric power operation power supply 1 provides DC220/110V direct current by the rectifying component in the converter component 7, and the communication power supply 2 supplies 48V direct current by the charging component 6 through the counter-current component 41 in the shared battery pack 4; when the ac power supply ABC is powered off, the power-operated power supply 1 and the communication power supply 2 share the common battery pack 4, and at this time, the common battery pack 4 supplies DC power of 220/110V to the power-operated power supply 1 via the DC boost component in the inverter unit 7 while supplying DC power of-48V directly to the communication power supply 2.
It is apparent that those skilled in the art can make various changes and modifications to the hybrid dc power supply device for a substation of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A hybrid DC power supply device for a substation, comprising a charging part (6) and a storage battery pack which electrically connect an AC power supply (ABC), an electric operation power supply (1) and a communication power supply (2), characterized in that:
the device also comprises a current transformation component (7) consisting of a rectifying component and a direct current boosting component;
the storage battery pack is a common battery pack (4), the common battery pack (4) is formed by connecting a counter current assembly (41) and an electric storage assembly (42) in series, the input end of the common battery pack is electrically connected with the output end of the charging component (6), and the output end of the common battery pack is electrically connected with the communication power supply (2);
the input end of the charging component (6) is electrically connected with an alternating current power supply (ABC), and the output end of the charging component is electrically connected with the input end of the common battery pack (4);
the output end of the current transformation component (7) is electrically connected with the electric power operation power supply (1), the input end of the rectification component is electrically connected with the alternating current power supply (ABC), and the input end of the direct current boosting component is electrically connected with the output end of the common battery pack (4).
2. The hybrid direct-current power supply device for a substation according to claim 1, wherein the electricity storage module (42) is composed of 4-by-12V batteries or 24-by-2V batteries connected in series.
3. The hybrid dc power supply device for a substation according to claim 1, wherein the common battery packs (4) are connected in parallel in two or more groups.
4. A hybrid dc power supply apparatus for a substation according to claim 1, wherein the charging member (6) is provided in such a manner that two or more members are connected in parallel.
5. A hybrid dc power supply unit for substations as claimed in claim 1, wherein the current transforming parts (7) are provided in more than two parallel connections.
6. The hybrid DC power supply device for a substation according to claim 1, wherein the DC boost component is a DC/DC booster.
7. A hybrid dc power supply unit for a substation according to claim 1, wherein a three-phase ac voltage sensor (5) is provided on the ac power supply (ABC).
8. A hybrid DC power supply unit for substations as claimed in claim 7, characterized in that the output of the three-phase AC voltage sensor (5) is electrically connected to the input of the monitoring component (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166137.9U CN210273591U (en) | 2019-07-24 | 2019-07-24 | Mixed type direct current power supply device for transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166137.9U CN210273591U (en) | 2019-07-24 | 2019-07-24 | Mixed type direct current power supply device for transformer substation |
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| CN210273591U true CN210273591U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380507A (en) * | 2019-07-24 | 2019-10-25 | 安徽新力电气设备有限责任公司 | Substation's mixed type continuous-current plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380507A (en) * | 2019-07-24 | 2019-10-25 | 安徽新力电气设备有限责任公司 | Substation's mixed type continuous-current plant |
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