CN113555937B - Automatic switching method for three-charging and two-charging - Google Patents
Automatic switching method for three-charging and two-charging Download PDFInfo
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- CN113555937B CN113555937B CN202110850613.4A CN202110850613A CN113555937B CN 113555937 B CN113555937 B CN 113555937B CN 202110850613 A CN202110850613 A CN 202110850613A CN 113555937 B CN113555937 B CN 113555937B
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- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of transformer substation power distribution, in particular to a three-charging two-charging automatic switching method. The method comprises the steps that a charging side supplies power to a power storage side and a power utilization side respectively, and the power storage side and a switching side are disconnectable; the charging side is disconnected, and the power storage side supplies power to the power utilization side; the switching side automatically connects the standby power measurement with the power storage side and the power utilization side to supply power to the power utilization side and the power storage side until the charging side is electrified, and then the switching side automatically disconnects the standby power measurement with the power storage side and the power utilization side. According to the invention, the intermediate relay and the direct current contactor are switched between the power supply modes of the charging side and the standby side through the matching of the power storage side, so that the automatic switching of the charging side and the standby side is realized, the equipment in the distribution control room of the transformer substation can stably operate for a long time, the burden of manual guard is reduced, and the problem of overhigh manual guard cost for 24 hours is solved.
Description
Technical Field
The invention relates to the technical field of substation power distribution, in particular to a three-charging two-charging automatic switching method.
Background
The power distribution is a link directly connected with a user in a power system and distributes power energy to the user, the power distribution system consists of a substation power distribution control room, a high-voltage distribution line, a distribution transformer, a low-voltage distribution line and corresponding control protection equipment, and the equipment in the substation power distribution control room cannot be powered off, so that the storage battery is particularly important, the storage battery cannot be powered off for a long time usually, and three groups of chargers are generally adopted for charging.
The three groups of existing chargers charge two groups of batteries, the third group of chargers can only charge the storage battery by manually switching on after the first group or the second group of chargers have power failure, and the third group of chargers can only manually switch back after the first group or the second group of charging devices have power, so that the manual on-duty guard is needed, the stable operation of equipment is ensured, the manual burden is greatly increased, and the power distribution cost is improved.
Disclosure of Invention
The present invention is directed to a method for automatically switching between three charging modes and two charging modes, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides a three-charging two-charging automatic switching method, which comprises the following steps:
s1, the charging side supplies power to the power storage side and the power utilization side respectively, and the power storage side and the switching side are disconnected;
s2, the charging side is disconnected, and the power storage side supplies power to the power utilization side;
and S3, the switching side automatically connects the standby power measurement with the power storage side and the power utilization side to supply power to the power utilization side and the power storage side until the charging side is electrified, and the switching side automatically disconnects the standby power measurement with the power storage side and the power utilization side.
As a further improvement of this technical solution, the charging side includes a first charging screen and a second charging screen, the backup side includes a backup charging screen, the power utilization side includes a first bus and a second bus, the power storage side includes a first storage battery and a second storage battery, and the switching side includes a switching module, in which:
the output ends of the first charging screen and the second charging screen are respectively connected with the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery; the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery are also connected with the standby charging screen; the standby charging screen is connected with the switching module in a two-way mode, the input end of the switching module is connected with the first charging screen, the second charging screen, the first storage battery and the second storage battery, and the first bus is connected with the second bus.
As a further improvement of the technical scheme, the output ends of the first charging screen and the second charging screen are respectively provided with a diode, and the first charging screen and the second charging screen are respectively connected with the first bus and the second bus, and the first storage battery and the second storage battery through the diodes.
As a further improvement of the technical scheme, the output ends of the first charging screen and the second charging screen are further provided with an intermediate relay, the output end of the standby charging screen is provided with two direct current contactors, and the standby charging screen is connected to the working power supply of the first charging screen and the working power supply of the second charging screen respectively after passing through the two direct current contactors.
As a further improvement of the technical solution, the intermediate relay and the dc contactor are connected to form a switching circuit for switching the standby charging screen in an abnormal situation, and the switching circuit is disposed in the switching module.
As a further improvement of the technical scheme, the first charging screen, the second charging screen and the standby charging screen are kept in working states under normal conditions.
As a further improvement of the technical scheme, the working state of the standby charging screen is in a standby state under the working conditions of the first charging screen and the second charging screen.
As a further improvement of the technical scheme, the power supply ends of the first charging screen, the second charging screen and the standby charging screen are connected with a working power supply.
As a further improvement of the technical scheme, the rated voltage of the working power supply is 220V.
As a further improvement of the technical scheme, under the working condition of the first charging screen and the second charging screen, the control contact of the intermediate relay is in an off state, and the direct current contactor is in a non-attraction state.
Compared with the prior art, the invention has the beneficial effects that:
according to the automatic three-charging and two-charging switching method, the intermediate relay and the direct current contactor are switched between the power supply modes of the charging side and the standby side through the matching of the power storage side, so that the automatic switching of the charging side and the standby side is realized, the equipment in a distribution control room of a transformer substation can stably operate for a long time, the burden of manual guard is reduced, and the problem of overhigh manual guard cost in 24 hours is solved.
Drawings
Fig. 1 is an overall power supply flow block diagram of embodiment 1 of the present invention;
FIG. 2 is a block diagram of a detailed power supply flow in embodiment 1 of the present invention;
fig. 3 is a first block diagram of a power supply flow among the charging side, the storage side, and the power utilization side in embodiment 1 of the present invention;
fig. 4 is a block diagram of a power supply flow among the charging side, the storage side, and the power consumption side in embodiment 1 of the present invention;
fig. 5 is a third block diagram of a power supply flow among the charging side, the storage side, and the power utilization side in embodiment 1 of the present invention;
fig. 6 is a fourth block diagram of a power supply flow among the charging side, the storage side, and the power utilization side in embodiment 1 of the present invention;
fig. 7 is a block diagram of a power supply flow between the standby charging screen and the first charging screen and the second charging screen in embodiment 1 of the present invention;
fig. 8 is a power supply flow block diagram of a switching circuit according to embodiment 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example 1
Referring to fig. 1, the present invention provides a technical solution:
the invention provides a three-charging two-charging automatic switching method, which comprises the following steps:
s1, the charging side supplies power to the power storage side and the power utilization side respectively, and the power storage side and the switching side are disconnected;
s2, the charging side is disconnected, and the power storage side supplies power to the power utilization side;
and S3, the switching side automatically connects the standby power measurement with the power storage side and the power utilization side to supply power to the power utilization side and the power storage side until the charging side is electrified, and the switching side automatically disconnects the standby power measurement with the power storage side and the power utilization side.
In addition, please refer to fig. 2, the charging side includes a first charging screen and a second charging screen, the standby side includes a standby charging screen, the power utilization side includes a first bus and a second bus, the power storage side includes a first storage battery and a second storage battery, and the switching side includes a switching module, wherein:
the output ends of the first charging screen and the second charging screen are respectively connected with the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery; the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery are also connected with the standby charging screen; the standby charging screen is connected with the switching module in a two-way mode, the input end of the switching module is connected with the first charging screen, the second charging screen, the first storage battery and the second storage battery, and the first bus is connected with the second bus.
In the specific operation, firstly, the first charging screen and the second charging screen are respectively provided with diodes at the output ends, please refer to fig. 3 and 4, the first charging screen and the second charging screen are respectively connected with the first bus and the second bus and the first storage battery and the second storage battery through the diodes, so as to realize the unidirectional conduction of the output currents of the first charging screen and the second charging screen, in addition, the output ends of the first charging screen and the second charging screen are also provided with an intermediate relay, please refer to fig. 5 and 6, the intermediate relay is powered by the output of the first charging screen and the second charging screen, meanwhile, the output end of the standby charging screen is provided with two direct current contactors, please refer to fig. 7, the standby charging screen is respectively connected with the working power supplies (the power supply ends of the first charging screen, the second charging screen and the standby charging screen) after passing through the two direct current contactors, the rated voltage of the working power supply is 220V), and then please refer to fig. 8, the intermediate relay and the dc contactor are connected to form a switching circuit to switch the standby charging screen under abnormal conditions (the switching circuit is arranged in the switching module), the closing and opening of the dc contactor are controlled by the intermediate relay of the first charging screen and the second charging screen, specifically as follows:
under normal conditions, the first charging screen, the second charging screen and the standby charging screen are all in working states, the first charging screen provides power for the first bus and charges the first storage battery at the same time, the second charging screen provides power for the second bus and charges the second storage battery at the same time, when the first charging screen and the second charging screen work normally, the control contacts of the intermediate relays of the first charging screen and the second charging screen are in a disconnected state, the direct current contactor cannot be attracted, and the standby charging screen is in a standby state;
when the first charging screen works abnormally (when the first charging screen is dead or damaged), because the diode is additionally arranged on the output side of the charging screen, the electricity of the storage battery cannot be supplied to the intermediate relay, the intermediate relay controls the contact to be closed under the condition of no electricity, the standby charging screen is closed corresponding to the direct current contactor of the first charging screen, and the standby charging screen is put into operation to be used as a first bus to supply power and charge the first storage battery;
with the reason when the second screen work of charging is unusual (the second screen that charges does not have the electricity or when damaging), the reserve direct current contactor that charges the screen and correspond first screen of charging is closed, thereby make auxiliary relay and direct current contactor switch the power supply mode of the side of charging and the side of being prepared for electricity through the cooperation that holds the side, and then realize the automatic switch-over of the side of charging and the side of being prepared for electricity, the equipment in the distribution control room of transformer substation can long-term steady operation, the burden of artifical guard has been reduced, the problem of artifical 24 hours guard cost is too high has been solved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A three-charging two-charging automatic switching method is characterized by comprising the following steps:
s1, the charging side supplies power to the power storage side and the power utilization side respectively, and the power storage side and the switching side are disconnected;
s2, the charging side is disconnected, and the power storage side supplies power to the power utilization side;
s3, the switching side automatically connects the standby side with the power storage side and the power utilization side to supply power to the power utilization side and the power storage side until the charging side is electrified, and then the switching side automatically disconnects the standby side from the power storage side and the power utilization side;
the side of charging includes first screen and the second screen that charges, and the side of being prepared for includes the screen that charges that stands by for, and the power consumption side includes first busbar and second busbar, and the electric power storage side includes first battery and second battery, switches the side and includes the switching module, wherein:
the output ends of the first charging screen and the second charging screen are respectively connected with the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery; the input ends of the first bus and the second bus and the input ends of the first storage battery and the second storage battery are also connected with the standby charging screen; the standby charging screen is connected with the switching module in a bidirectional mode, meanwhile, the input end of the switching module is also connected with the first charging screen, the second charging screen, the first storage battery and the second storage battery, and in addition, the first bus is connected with the second bus;
the output ends of the first charging screen and the second charging screen are respectively provided with a diode, and the first charging screen and the second charging screen are respectively connected with the first bus and the second bus, and the first storage battery and the second storage battery through the diodes;
the output ends of the first charging screen and the second charging screen are also provided with an intermediate relay, the output end of the standby charging screen is provided with two direct current contactors, and the standby charging screen is connected with the working power supplies of the first charging screen and the second charging screen respectively after passing through the two direct current contactors;
the intermediate relay and the direct current contactor are connected to form a switching circuit used for switching the standby charging screen under the abnormal condition, and the switching circuit is arranged in the switching module.
2. The automatic three-charge two-power switching method according to claim 1, wherein: the first charging screen, the second charging screen and the standby charging screen are all kept in working states under normal conditions.
3. The automatic three-charge two-power switching method according to claim 2, characterized in that: the working state of the standby charging screen is in a standby state under the working conditions of the first charging screen and the second charging screen.
4. A three-charge two-charge automatic switching method according to claim 3, characterized in that: and the power supply ends of the first charging screen, the second charging screen and the standby charging screen are connected with a working power supply.
5. The automatic three-charge two-power switching method according to claim 4, wherein: the rated voltage of the working power supply is 220V.
6. The automatic three-charge two-power switching method according to claim 5, wherein: under the working condition of the first charging screen and the second charging screen, the control contact of the intermediate relay is in a disconnected state, and the direct current contactor is in a non-attraction state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850613.4A CN113555937B (en) | 2021-07-27 | 2021-07-27 | Automatic switching method for three-charging and two-charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850613.4A CN113555937B (en) | 2021-07-27 | 2021-07-27 | Automatic switching method for three-charging and two-charging |
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| Publication Number | Publication Date |
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| CN113555937A CN113555937A (en) | 2021-10-26 |
| CN113555937B true CN113555937B (en) | 2022-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110850613.4A Active CN113555937B (en) | 2021-07-27 | 2021-07-27 | Automatic switching method for three-charging and two-charging |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842957A (en) * | 2012-09-28 | 2012-12-26 | 重庆泊津科技有限公司 | Intelligent seamless switching device for double direct-current operation power supplies of converting station |
| CN107846074A (en) * | 2017-11-29 | 2018-03-27 | 国家电网公司 | The anti-misoperation locking control system and method for a kind of transformer station direct current system |
| WO2019159513A1 (en) * | 2018-02-14 | 2019-08-22 | ソニー株式会社 | Power storage control device, power storage control method, and computer program |
| CN209526559U (en) * | 2019-04-19 | 2019-10-22 | 国家电网有限公司 | A kind of converter station 110V DC power system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680559B (en) * | 2016-04-06 | 2018-07-27 | 国家电网公司 | A kind of transformer station direct current system |
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2021
- 2021-07-27 CN CN202110850613.4A patent/CN113555937B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842957A (en) * | 2012-09-28 | 2012-12-26 | 重庆泊津科技有限公司 | Intelligent seamless switching device for double direct-current operation power supplies of converting station |
| CN107846074A (en) * | 2017-11-29 | 2018-03-27 | 国家电网公司 | The anti-misoperation locking control system and method for a kind of transformer station direct current system |
| WO2019159513A1 (en) * | 2018-02-14 | 2019-08-22 | ソニー株式会社 | Power storage control device, power storage control method, and computer program |
| CN209526559U (en) * | 2019-04-19 | 2019-10-22 | 国家电网有限公司 | A kind of converter station 110V DC power system |
Non-Patent Citations (1)
| Title |
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| 变电站直流***的运行与维护;罗艳 等;《电气应用》;20170930;第36卷(第17期);44-47 * |
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