CN210224959U - Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply - Google Patents
Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply Download PDFInfo
- Publication number
- CN210224959U CN210224959U CN201921561130.7U CN201921561130U CN210224959U CN 210224959 U CN210224959 U CN 210224959U CN 201921561130 U CN201921561130 U CN 201921561130U CN 210224959 U CN210224959 U CN 210224959U
- Authority
- CN
- China
- Prior art keywords
- power supply
- parallel
- current
- direct
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model relates to a parallelly connected DC power supply system field, it discloses a parallelly connected DC power supply system of distributing type that has high security, high reliability, saves investment and reduces occupation space suitable for parallelly connected redundant alternating current uninterrupted power source. The utility model provides a parallelly connected DC power supply system of distributing type includes: the intelligent power supply controller comprises a power supply intelligent controller and a plurality of direct current bus sections; the plurality of direct current bus sections are connected through the interconnection switch; a parallel direct-current power supply system component is arranged below each direct-current bus section, and each direct-current bus section is connected with a matched host of a parallel redundant alternating-current uninterrupted power supply through a direct-current feeder switch; the signal input end of the intelligent power supply controller collects bus section switch position signals, bus inlet switch position signals of all sections and inlet current and voltage value signals of all sections of buses of the parallel redundant alternating current uninterruptible power supply; and the signal output end of the power supply intelligent controller is connected with the control end of each direct current feeder switch and the control end of the interconnection switch.
Description
Technical Field
The utility model relates to a parallelly connected DC power supply system field, concretely relates to parallelly connected DC power supply system of distributing type suitable for parallelly connected redundant alternating current uninterrupted power source.
Background
An alternating current Uninterruptible Power Supply (UPS) is arranged in a power plant, a transformer substation and a converter station which are monitored by a computer and is used for computer loads with extremely high requirements on power supply interruption time. The main power supply of the AC UPS is from a security power supply of a power plant, a transformer substation and a converter station, when the main power supply fails or disappears, the main power supply is switched to the DC power supply to supply power continuously, and the capacity of the storage battery pack of the DC power supply system needs to consider the load requirement of the AC UPS.
The AC UPS adopts a total station centralized setting or an area decentralized setting mode according to the engineering voltage grade, the construction scale, the secondary equipment arrangement mode and the requirement configuration of a computer monitoring system. For a large-scale power plant, a direct-current extra-high voltage converter station and an alternating-current extra-high voltage transformer substation, two sets of alternating-current uninterrupted power supplies are configured in each area.
The AC UPS has several connection modes, and the parallel redundancy includes 2 or several parallelly connected AC UPS hosts sharing load and 1 or several AC UPS hosts failing to bear all the load.
The original direct-current power supply system adopts a series storage battery pack, but the problem that the reliability of the direct-current power supply system is influenced by the open circuit of a single storage battery exists. With the development of technology, in recent years, a parallel direct current power supply system is proposed, in which a 12V storage battery or 6 2V storage batteries and matched devices such as an AC/DC charging module and a DC/DC boosting module form an intelligent battery assembly, and high-voltage outputs of a plurality of battery assemblies are connected in parallel. Because there is not direct connection relation between the battery pack, partial storage battery damages and can not lead to whole group battery retirement, has the characteristics that can change on line, and the volume is checked on line.
The large-scale power plant, the direct-current extra-high voltage converter station and the alternating-current extra-high voltage transformer substation are provided with alternating-current uninterruptible power supplies in a distributed mode according to the region, the alternating-current uninterruptible power supplies are matched with the distributed characteristics of the parallel direct-current power supply system components, and the alternating-current uninterruptible power supplies and the parallel direct-current power supply system components have good cooperation application prospects.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the distributed parallel direct-current power supply system is suitable for parallel redundant alternating-current uninterruptible power supplies, has high safety and reliability, saves investment and reduces occupied space.
The utility model provides a technical scheme that above-mentioned technical problem adopted is:
the distributed parallel direct-current power supply system is suitable for a parallel redundant alternating-current uninterruptible power supply, the capacity of each host of the parallel redundant alternating-current uninterruptible power supply is set according to the whole load of the parallel redundant alternating-current uninterruptible power supply, and a bus of the parallel redundant alternating-current uninterruptible power supply is segmented by adopting a single bus; the distributed parallel direct current power supply system includes: the intelligent power supply controller comprises a power supply intelligent controller and a plurality of direct current bus sections; the plurality of direct current bus sections are connected through a communication switch; a parallel direct-current power supply system component is arranged below each direct-current bus section, and each direct-current bus section is connected with a matched host of a parallel redundant alternating-current uninterrupted power supply through a direct-current feeder switch; the signal input end of the intelligent power supply controller collects bus sectional switch position signals of the parallel redundant alternating current uninterruptible power supply, incoming line switch position signals of all sections of buses and incoming line current and voltage value signals of all sections of buses; and the signal output end of the power supply intelligent controller is connected with the control end of each direct-current feeder switch and the control end of the interconnection switch.
As a further optimization, the total capacity of the parallel direct current power supply system components under the direct current bus section matched with each host of the parallel redundant alternating current uninterrupted power supply is set according to the host capacity x (N/N), wherein N is the total number of the hosts of the parallel redundant alternating current uninterrupted power supply, and N is the number of the hosts of the parallel redundant alternating current uninterrupted power supply matched with the direct current bus section.
As a further optimization, when the parallel redundant ac uninterruptible power supply is configured with two hosts, the number of the dc bus segments of the distributed parallel dc power supply system is set to two segments, the dc bus segments are matched with the hosts one-to-one, and the total capacity of the components of the parallel dc power supply system under the dc bus segment matched with each host is set to half the capacity of the host.
For further optimization, when the parallel redundant AC UPS is configured with N hosts, N is more than or equal to 3, the number of the DC bus sections of the distributed parallel DC power supply system is set to two sections, each section of the DC bus is matched with N hosts, N is less than or equal to N, and the total capacity of the components of the parallel DC power supply system under each DC bus section is set according to the N/N of the host capacity.
For further optimization, when the parallel redundant AC UPS is configured with N hosts, N is more than or equal to 3, the number of the DC bus sections of the distributed parallel DC power supply system is set to be N, the DC bus sections are matched with the hosts one to one, and the total capacity of the components of the parallel DC power supply system under the DC bus section matched with each host is set according to the host capacity 1/N.
The utility model has the advantages that:
based on the distributed parallel direct-current power supply system, the intelligent power supply controller is used for acquiring the bus section switch position, the bus incoming line current and the bus voltage value of the alternating-current uninterrupted power supply, judging the running mode of the alternating-current uninterrupted power supply, instructing the corresponding direct-current bus tie switch and the corresponding direct-current feeder line switch connected with the alternating-current uninterrupted power supply host to be connected and disconnected, supporting the running modes of parallel redundant alternating-current uninterrupted power supply host such as the operation in a row mode and the replacement of other hosts when the host exits, and realizing the synchronous regulation of the running mode of the distributed parallel direct-current power supply system.
Through reasonable selection of the capacity of the parallel direct-current power supply system components under the direct-current bus section matched with the parallel redundant alternating-current uninterruptible power supply main unit, the requirement of bearing all loads when partial main units are withdrawn can be met, and investment waste and larger installation space requirements caused by the configuration of the parallel direct-current power supply system components under each section of direct-current bus according to the all capacities of the main units can be avoided.
The whole distributed parallel direct-current power supply system is simple and convenient to operate, flexible in switching, low in investment, small in occupied space, high in safety and reliability, and good in application prospect and social and economic values, and a matching system structure and a wiring type are built according to various possible operation modes.
Drawings
Fig. 1 is a schematic diagram of a distributed parallel dc power system suitable for a parallel redundant ac ups dual host configuration in embodiment 1;
FIG. 2 is a schematic diagram of a distributed two-segment bus parallel DC power supply system suitable for a parallel redundant AC UPS N (N is greater than or equal to 3) host configuration in embodiment 2;
FIG. 3 is a schematic diagram of a distributed multi-segment bus parallel DC power supply system suitable for configuring a parallel redundant AC UPS N (N is greater than or equal to 3) host in embodiment 3.
Detailed Description
The utility model aims at providing a be applicable to parallelly connected redundant alternating current uninterrupted power source have high security, high reliability, save investment and reduce occupation space's parallelly connected direct current power supply system of distributing type. The core idea is as follows: matching the characteristics of distributed arrangement of an alternating current uninterrupted power supply and a parallel direct current power supply system component of a large-scale power plant, a direct current extra-high voltage converter station and an alternating current extra-high voltage transformer substation according to the region distributed arrangement, and building a matched parallel direct current power supply system structure and a matched wiring pattern aiming at multiple possible operation modes of the alternating current uninterrupted power supply; when the system is used, the intelligent power supply controller is used for acquiring the bus section switch position, the bus inlet current and the bus inlet voltage value of the alternating current uninterrupted power supply, so that the operation mode of the alternating current uninterrupted power supply is judged, the corresponding direct current bus connection switch and the corresponding direct current feeder switch connected with the alternating current uninterrupted power supply host are instructed to be switched on/off, the operation modes of the parallel redundant alternating current uninterrupted power supply host such as the operation in a row mode and the replacement of other hosts when the host exits are supported, and the operation mode of the distributed parallel direct current power supply system is synchronously adjusted. The system is simple and convenient to operate, flexible in switching, low in investment, small in occupied space, high in safety and reliability, and has good application prospect and social and economic values.
In the utility model, the capacity of each host of the parallel redundant AC UPS is set according to the whole load of the parallel redundant AC UPS, and the bus adopts single bus segmentation; the utility model provides a parallelly connected DC power supply system of distributing type includes: the intelligent power supply controller comprises a power supply intelligent controller and a plurality of direct current bus sections; the plurality of direct current bus sections are connected through a communication switch; a parallel direct-current power supply system component is arranged below each direct-current bus section, and each direct-current bus section is connected with a matched host of a parallel redundant alternating-current uninterrupted power supply through a direct-current feeder switch; the signal input end of the intelligent power supply controller collects bus sectional switch position signals of the parallel redundant alternating current uninterruptible power supply, incoming line switch position signals of all sections of buses and incoming line current and voltage value signals of all sections of buses; and the signal output end of the power supply intelligent controller is connected with the control end of each direct current feeder switch and the control end of the interconnection switch.
The parallel direct current power supply system component comprises a storage battery (12V storage battery or 6 2V storage batteries) and matched AC/DC charging modules, DC/DC boosting modules and the like, and the high-voltage output of each component is connected with a direct current bus section.
Example 1:
in the embodiment, two hosts are configured for a parallel redundant alternating current uninterruptible power supply, and two segments of direct current bus of a distributed direct current power supply system are provided to build the distributed parallel direct current power supply system;
as shown in fig. 1, two hosts of the parallel redundant ac UPS are respectively UPS a and UPS B; the direct current bus of the distributed direct current power supply system is divided into two direct current bus sections of a direct current power supply screen I section and a direct current power supply screen II section;
the first section of the direct-current power supply screen is connected to the UPS A through a direct-current feeder switch; the second section of the direct-current power supply screen is connected to the UPS B through a direct-current feeder switch; the two direct current bus sections are connected through a connection switch;
the signal input end of the intelligent power supply controller is connected with an alternating-current uninterruptible power supply bus section switch, a bus (section A bus) incoming line switch of the UPS A and a bus (section B bus) incoming line switch of the UPS B; the signal output end is connected with a tie switch and two direct current feeder switches between two direct current bus sections of the distributed parallel direct current power supply.
Under normal conditions, two hosts of the parallel redundant AC UPS operate in a row, each host carries half of load, and the total capacity of the components of the parallel DC power supply system under the DC bus section matched with each host is selected according to half of the capacity of the host. When the total station alternating current loses power, an input power supply of the alternating current uninterrupted power supply is switched to direct current, and the intelligent controller of the parallel direct current power supply collects the bus section switch position, the bus inlet wire current and the voltage value of the alternating current uninterrupted power supply.
If the bus section switch is disconnected, the bus incoming line switch is switched on, and the incoming lines of the two loops of buses have current pressure, the parallel redundant AC UPS is judged to still operate in a split mode, the intelligent controller instructs the DC bus connection switch to be disconnected, the two loops of DC feeder switches of the AC UPS are switched on simultaneously, each section of DC bus supplies power to the corresponding AC UPS host respectively, and the split mode is ensured from the source of the DC power supply.
If the intelligent controller collects that the bus section switches of the alternating current uninterrupted power supply are switched on, one bus incoming line switch is switched off and has no current and no voltage, the fact that the bus corresponding to the bus section of the parallel redundant alternating current uninterrupted power supply exits from operation is judged, the other host machine has all loads, the intelligent controller instructs the direct current bus connection switch to be switched on, the direct current bus connection switch is switched on to the direct current feeder switch of the alternating current uninterrupted power supply host machine which is still in operation, the other direct current bus feeder switch is switched off, and the direct current power supply system components connected in parallel under the two direct current buses are centralized to supply power to the alternating current uninterrupted power supply host machine which.
Because the total capacity of the direct current power supply system components connected in parallel under the direct current bus section matched with each host of the parallel redundant alternating current uninterrupted power supply is half of the capacity of the host, all the direct current power supply system components connected in parallel just can meet the requirement of the whole load at the moment, and the investment waste and the larger installation space requirement caused by the configuration of the direct current power supply system components connected in parallel under each section of the direct current bus according to the whole capacity of the host can be avoided.
Example 2:
in the embodiment, a parallel redundant alternating current uninterruptible power supply is configured with N hosts, N is more than or equal to 3, and two segments of direct current bus segments of a distributed direct current power supply system are arranged to build the distributed parallel direct current power supply system;
as shown in fig. 2, 3 hosts of the parallel redundant ac UPS are respectively UPS a, UPS B, and UPS C; the direct current bus of the distributed direct current power supply system is divided into two direct current bus sections of a direct current power supply screen I section and a direct current power supply screen II section;
the first section of the direct-current power supply screen is connected to the UPS A through a direct-current feeder switch and is connected to the UPS B through a direct-current feeder switch; the second section of the direct-current power supply screen is connected to the UPS C through a direct-current feeder switch; the two direct current bus sections are connected through a connection switch;
because 3 hosts of the parallel redundant alternating current uninterruptible power supply correspond to 3 sections of buses, 2 section switches are needed to realize the connection of the 3 sections of buses;
the signal input end of the intelligent power supply controller is connected with 2 bus section switches of an alternating-current uninterruptible power supply, a bus (section A bus) incoming line switch of a UPSA (unified power supply), a bus (section B bus) incoming line switch of a UPS B and a bus (section C bus) incoming line switch of a UPS C; the signal output end is connected with a tie switch and 3 direct current feeder switches between two direct current bus sections of the distributed parallel direct current power supply.
For normal conditions, 3 hosts run in rows and columns, each host carries 1/3 loads, each section of direct current bus of the parallel direct current power supply system is matched with n (n is less than or equal to 3) hosts, and the total capacity of components of the parallel direct current power supply system under the direct current bus section is selected according to the host capacity n/3. The acquisition amount and the control object of the intelligent controller of the parallel direct-current power supply are similar to the situation of configuring two hosts, namely the running mode of the alternating-current uninterrupted power supply is judged by acquiring the bus section switch position, the bus incoming line current and the voltage value of the alternating-current uninterrupted power supply, and specifically which host exits, and which other hosts carry loads for exiting the host, so that the running mode of the distributed parallel direct-current power supply system is synchronously adjusted. When a parallel redundant AC UPS host matched with a certain section of DC bus is partially withdrawn, the intelligent controller instructs the DC bus tie switch to keep on/off, and the DC power system component connected in parallel under the DC bus of the section continues to supply power to the running AC UPS host; only when the parallel redundant AC uninterrupted power supply host matched with the DC bus section completely exits, the intelligent controller instructs the DC bus interconnection switch to be switched on, so that the high reliability of power supply can be ensured, the conventional requirements of the existing national/industrial standard on two sections of DC buses are met, the configuration is clear, and the investment is saved.
Example 3:
in the embodiment, a parallel redundant alternating current uninterruptible power supply is configured with N hosts, N is more than or equal to 3, and N segments are arranged on a direct current bus segment of a distributed direct current power supply system to build the distributed parallel direct current power supply system;
as shown in fig. 3, 3 hosts of the parallel redundant ac UPS are respectively UPS a, UPS B, and UPS C; the direct current bus of the distributed direct current power supply system is divided into 3 direct current bus sections of a direct current power supply screen I section, a direct current power supply screen II section and a direct current power supply screen III section;
the first section of the direct-current power supply screen is connected to the UPS A through a direct-current feeder switch, and the second section of the direct-current power supply screen is connected to the UPS B through a direct-current feeder switch; the third section of the direct-current power supply panel is connected to the UPS C through a direct-current feeder switch; the 3 direct current bus sections are connected through two interconnection switches, namely the I section of the direct current power supply screen is connected with the II section of the direct current power supply screen through an I-II interconnection switch, and the II section of the direct current power supply screen is connected with the III section of the direct current power supply screen through an II-III interconnection switch;
because 3 hosts of the parallel redundant alternating current uninterruptible power supply correspond to 3 sections of buses, 2 section switches are needed to realize the connection of the 3 sections of buses;
the signal input end of the intelligent power supply controller is connected with 2 bus section switches of an alternating-current uninterruptible power supply, a bus (section A bus) incoming line switch of a UPSA (unified power supply), a bus (section B bus) incoming line switch of a UPS B and a bus (section C bus) incoming line switch of a UPS C; the signal output end is connected with 2 tie switches and 3 direct current feeder switches between two direct current bus sections of the distributed parallel direct current power supply.
For normal conditions, 3 main machines operate in rows and columns, each main machine is provided with 1/3 loads, each section of direct current bus of the parallel direct current power supply system is matched with 1 main machine, and the total capacity of components of the parallel direct current power supply system under the direct current bus section is selected according to the capacity 1/3 of the main machine. The acquisition amount and the control object of the power supply intelligent controller are similar to the situation of configuring 3 hosts in embodiment 2, and the difference is that each section of direct current bus is matched with 1 parallel redundant alternating current uninterruptible power supply host, and the direct current bus connection switch is more than 1.
The method adopts one-to-one configuration of the direct current bus section and the parallel redundant alternating current uninterruptible power supply host, has clear power source, is convenient for fault location and elimination, and is suitable for places with determined operation modes and higher requirement on maintenance and recovery time.
It should be noted that, as the total number N of the hosts of the ac ups increases, the number of the operation modes of the ac ups increases exponentially, and the connection mode between the dc bus segments is complicated. Therefore, the connection between the DC bus sections can be determined by selecting several operation modes which are most likely to occur to the parallel redundant AC UPS, and the wiring complexity of the parallel DC power supply system is controlled within an acceptable range.
Claims (5)
1. Is suitable for a distributed parallel direct current power supply system of a parallel redundant alternating current uninterrupted power supply,
the system is characterized in that the capacity of each host of the parallel redundant AC UPS is set according to the total load of the parallel redundant AC UPS, and the buses of the parallel redundant AC UPS are segmented by adopting single buses;
the distributed parallel direct current power supply system includes: the intelligent power supply controller comprises a power supply intelligent controller and a plurality of direct current bus sections; the plurality of direct current bus sections are connected through a communication switch; a parallel direct-current power supply system component is arranged below each direct-current bus section, and each direct-current bus section is connected with a matched host of a parallel redundant alternating-current uninterrupted power supply through a direct-current feeder switch; the signal input end of the intelligent power supply controller collects bus sectional switch position signals of the parallel redundant alternating current uninterruptible power supply, incoming line switch position signals of all sections of buses and incoming line current and voltage value signals of all sections of buses; and the signal output end of the power supply intelligent controller is connected with the control end of each direct-current feeder switch and the control end of the interconnection switch.
2. The distributed parallel dc power system for parallel redundant ac upss of claim 1,
the method is characterized in that the total capacity of parallel direct current power supply system components under a direct current bus section matched with each host of the parallel redundant alternating current uninterrupted power supply is set according to the host capacity x (N/N), wherein N is the total number of the hosts of the parallel redundant alternating current uninterrupted power supply, and N is the number of the hosts of the parallel redundant alternating current uninterrupted power supply matched with the direct current bus section.
3. The distributed parallel dc power system for parallel redundant ac upss of claim 2,
when the parallel redundant AC UPS is provided with two hosts, the number of the DC bus sections of the distributed parallel DC power supply system is set to two sections, the DC bus sections are matched with the hosts one by one, and the total capacity of the components of the parallel DC power supply system under the DC bus section matched with each host is set according to half of the capacity of the host.
4. The distributed parallel dc power system for parallel redundant ac upss of claim 2,
the method is characterized in that when the parallel redundant alternating current uninterrupted power supply is provided with N hosts, N is more than or equal to 3, the number of the direct current bus sections of the distributed parallel direct current power supply system is set to be two sections, each section of direct current bus is matched with N hosts, N is less than or equal to N, and the total capacity of the components of the parallel direct current power supply system under each direct current bus section is set according to the N/N of the host capacity.
5. The distributed parallel dc power system for parallel redundant ac upss of claim 2,
the method is characterized in that when the parallel redundant AC UPS is provided with N hosts, N is more than or equal to 3, the number of the DC bus sections of the distributed parallel DC power supply system is set to be N, the DC bus sections are matched with the hosts in a one-to-one manner, and the total capacity of the components of the parallel DC power supply system under the DC bus section matched with each host is set according to the host capacity 1/N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921561130.7U CN210224959U (en) | 2019-09-19 | 2019-09-19 | Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921561130.7U CN210224959U (en) | 2019-09-19 | 2019-09-19 | Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210224959U true CN210224959U (en) | 2020-03-31 |
Family
ID=69921600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921561130.7U Active CN210224959U (en) | 2019-09-19 | 2019-09-19 | Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210224959U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701673A (en) * | 2021-01-15 | 2021-04-23 | 华电电力科学研究院有限公司 | Power plant comprehensive direct current system based on storage battery pack switching |
| CN116031924A (en) * | 2022-12-28 | 2023-04-28 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
-
2019
- 2019-09-19 CN CN201921561130.7U patent/CN210224959U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701673A (en) * | 2021-01-15 | 2021-04-23 | 华电电力科学研究院有限公司 | Power plant comprehensive direct current system based on storage battery pack switching |
| CN116031924A (en) * | 2022-12-28 | 2023-04-28 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
| CN116031924B (en) * | 2022-12-28 | 2024-04-16 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102368631B (en) | Efficient and reliable power supply architecture of data center electronic equipment | |
| US20220393491A1 (en) | Charging System for Swapping Station or Energy Storage Station | |
| US10468909B2 (en) | Data center power systems with dynamic source designation | |
| CN210224959U (en) | Distributed parallel direct-current power supply system suitable for parallel redundant alternating-current uninterruptible power supply | |
| CN102545355A (en) | Cabinet power supply system | |
| CN102629776A (en) | Auxiliary power supply system for power converter and method | |
| CN101710728A (en) | Method and device for supplying power to chassis equipment of communication machine room | |
| CN202455149U (en) | Power supply system for supplying electronic equipment and frame power supply | |
| CN110957719B (en) | Communication power supply design system and design method for nuclear power plant | |
| CN110867946A (en) | Alternating current-direct current hybrid power supply integrated power supply | |
| CN110601168A (en) | High-power high-reliability high-voltage direct-current power supply system | |
| CN101714776A (en) | 10KV station electric control system of convertor station adopting selecting 2 from 3 logic | |
| CN112701673A (en) | Power plant comprehensive direct current system based on storage battery pack switching | |
| CN114614555A (en) | Modular data center power supply and distribution system | |
| CN110912176A (en) | High-reliability power supply method for converter valve controller | |
| CN111181193A (en) | Optimization control method for pumped storage power station service power | |
| CN210806840U (en) | Alternating current-direct current hybrid power supply integrated power supply | |
| CN110932333A (en) | Power distribution system | |
| CN116316526B (en) | Power supply and standby system and method | |
| CN215498722U (en) | Automatic bypass device of 35kV direct-hanging SVG power unit | |
| US11283289B2 (en) | Uninterruptible power supply system having stranded power recovery | |
| CN217545604U (en) | Modularized hydrogen fuel cell power generation and supply system | |
| CN211351816U (en) | Power supply switching system | |
| CN203691053U (en) | High-risk power consumption user emergency power supply connection structure | |
| CN215870370U (en) | Parallel communication power supply management and maintenance device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |