CN110797964A - Direct-current power supply circuit applied to photovoltaic power station - Google Patents
Direct-current power supply circuit applied to photovoltaic power station Download PDFInfo
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- CN110797964A CN110797964A CN201910457926.6A CN201910457926A CN110797964A CN 110797964 A CN110797964 A CN 110797964A CN 201910457926 A CN201910457926 A CN 201910457926A CN 110797964 A CN110797964 A CN 110797964A
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- power supply
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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
- H02J9/062—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 for AC powered loads
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A direct-current power supply circuit applied to a photovoltaic power station comprises a three-phase alternating-current power supply, a charging device, a storage battery and a voltage reduction silicon chain; a three-phase alternating current power supply is connected to a three-phase power supply bus after passing through an alternating current contactor; the input end of the charging device is connected with a three-phase power bus, and the output end of the charging device is connected with a power bus, so that three-phase alternating current is converted into direct current and is output to the power bus; the storage battery is connected with the power bus and used for storing the direct current electric energy; the input end of the voltage reduction silicon chain is connected with the power bus, and the output end of the voltage reduction silicon chain is connected with the control bus, so that direct current output by the charging device is subjected to voltage reduction treatment and is output to the control bus. The invention converts the AC power supply into the DC power supply which can supply power for the loads such as signal equipment, relay protection, breaker opening and closing, and the like, and can continuously supply the DC power supply for the loads by the storage battery under the condition that the external AC power supply is interrupted, thereby realizing the uninterrupted power supply.
Description
Technical Field
The invention belongs to the field of power supply systems, and particularly relates to a direct-current power supply circuit applied to a photovoltaic power station.
Background
The power system control must have a safe and reliable control power supply, and in power engineering, a safe and reliable direct current power supply system is needed to provide a stable direct current power supply for control, signals, protection, automatic devices, certain actuating mechanisms and the like in a transformer substation.
Disclosure of Invention
In order to solve the technical problem, the invention provides a direct-current power supply circuit applied to a photovoltaic power station, which comprises a three-phase alternating-current power supply, a charging device, a storage battery and a voltage reduction silicon chain; the three-phase alternating current power supply is connected to a three-phase power supply bus after passing through the alternating current contactor; the input end of the charging device is connected with the three-phase power supply bus, and the output end of the charging device is connected with the power bus, so that three-phase alternating current is converted into direct current and is output to the power bus; the storage battery is connected with the power bus and used for storing the direct current electric energy; the input end of the voltage reduction silicon chain is connected with the power bus, and the output end of the voltage reduction silicon chain is connected with the control bus, so that direct current output by the charging device is subjected to voltage reduction treatment and is output to the control bus.
Furthermore, the circuit further comprises a plurality of first direct current air switches HK and a plurality of second direct current air switches KK, wherein the input ends of the first direct current air switches HK are connected with the power bus, and the input ends of the second direct current air switches KK are connected with the control bus.
Furthermore, the circuit also comprises a shunt FL1, a Hall sensor H1, a battery switch and a battery switch +, the negative electrode of the storage battery is connected to the negative electrode line of the power bus after passing through the battery switch, the Hall sensor H1 and the shunt FL1 in sequence, and the positive electrode of the storage battery is connected to the positive electrode line of the power bus after passing through the battery switch.
Further, the circuit further comprises a Hall sensor H2 and a current divider FL2, the negative electrode output end of the voltage reduction silicon chain is connected to the negative electrode line of the control bus after sequentially passing through the Hall sensor H2 and the current divider FL2, and the positive electrode output end of the voltage reduction silicon chain is directly connected to the positive electrode line of the control bus.
Furthermore, the circuit also comprises a lightning protection device, and the lightning protection device is connected into the three-phase power supply bus after passing through a knob switch QF 3.
Furthermore, the circuit comprises two paths of three-phase alternating-current power supplies, the two paths of three-phase alternating-current power supplies work redundantly, and one path of three-phase alternating-current power supply is controlled to be connected to a three-phase power supply bus through an alternating-current contactor mutual switching device to serve as an input power supply.
Furthermore, the number of the charging devices is two, the input ends of the two charging devices are connected with the three-phase power supply bus, and the output ends of the two charging devices are connected with the power bus.
Further, the charging device adopts a charging device with the model number TH230D10 NZ-D.
Further, the lightning protection device is LS1-CP/40KA 4P.
The invention has the beneficial effects that:
the invention can provide direct current power supply for signal equipment, relay protection, breaker opening and closing and other loads, and can continue to provide direct current power supply for the loads by the storage battery under the condition of interruption of the external alternating current power supply, thereby realizing uninterrupted power supply.
Drawings
Fig. 1 is a schematic connection diagram of a dc power circuit applied to a photovoltaic power station according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of a two-way three-phase ac power supply according to an embodiment of the present invention;
fig. 3 is a schematic connection diagram of two charging devices according to an embodiment 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 present invention, and not all 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.
As shown in fig. 1, the dc power circuit applied to a photovoltaic power station provided by the invention comprises a three-phase ac power supply, a charging device, a storage battery and a buck silicon chain; the three-phase alternating current power supply is connected to a three-phase power supply bus after passing through the alternating current contactor; the input end of the charging device is connected with the three-phase power supply bus, and the output end of the charging device is connected with the power bus, so that three-phase alternating current is converted into direct current and is output to the power bus; the storage battery is connected with the power bus and used for storing the direct current electric energy; the input end of the voltage reduction silicon chain is connected with the power bus, and the output end of the voltage reduction silicon chain is connected with the control bus, so that direct current output by the charging device is subjected to voltage reduction treatment and is output to the control bus.
The type of the charging device is TH230D10 NZ-D; the model of the silicon chain for reducing the voltage is LS1-CP/40KA 4P.
Preferably, the circuit further comprises a plurality of first direct current air switches HK and a plurality of second direct current air switches KK, wherein the input ends of the first direct current air switches HK are connected with the power bus, and the input ends of the second direct current air switches KK are connected with the control bus.
Preferably, the circuit further comprises a shunt FL1, a Hall sensor H1, a battery switch and a battery switch +, the negative electrode of the storage battery is connected to the negative electrode line of the power bus after passing through the battery switch, the Hall sensor H1 and the shunt FL1 in sequence, the positive electrode of the storage battery is connected to the positive electrode line of the power bus after passing through the battery switch, the connection of the storage battery is controlled through the battery switch and the battery switch, and the magnitude of the flowing direct current is measured through the Hall sensor and the shunt.
The lightning arrester is LS1-CP/40KA 4P.
Preferably, the circuit further comprises a hall sensor H2 and a shunt FL2, the negative output end of the buck silicon chain is connected to the negative line of the control bus after passing through the hall sensor H2 and the shunt FL2 in sequence, the magnitude of the direct current flowing through the buck silicon chain is measured by the hall sensor and the shunt, and the positive output end of the buck silicon chain is directly connected to the positive line of the control bus.
Preferably, the circuit further comprises a lightning protection device, the lightning protection device is connected to the three-phase power bus through a knob switch QF3, and the direct-current power supply equipment damaged by lightning stroke introduced from the alternating-current side is placed.
The signal model of the lightning protection device is LS1-CP/40KA 4P.
As shown in fig. 2, preferably, the circuit includes two three-phase ac power supplies, the two three-phase ac power supplies are operated redundantly, and one of the three-phase ac power supplies is controlled by an ac contactor mutual-throw device to be connected to a three-phase power bus as an input power supply.
As shown in fig. 3, preferably, there are two charging devices, namely, a charging device 1 and a charging device 2, and the input ends of the two charging devices are both connected to the three-phase power bus, and the output ends of the two charging devices are both connected to the power bus.
The invention converts the AC power supply into the DC power supply which can supply power for the loads such as signal equipment, relay protection, breaker opening and closing, and the like, and can continuously supply the DC power supply for the loads by the storage battery under the condition that the external AC power supply is interrupted, thereby realizing the uninterrupted power supply.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A direct current power supply circuit applied to a photovoltaic power station is characterized by comprising a three-phase alternating current power supply, a charging device, a storage battery and a voltage reduction silicon chain; the three-phase alternating current power supply is connected to a three-phase power supply bus after passing through the alternating current contactor; the input end of the charging device is connected with the three-phase power supply bus, and the output end of the charging device is connected with the power bus, so that three-phase alternating current is converted into direct current and is output to the power bus; the storage battery is connected with the power bus and used for storing the direct current electric energy; the input end of the voltage reduction silicon chain is connected with the power bus, and the output end of the voltage reduction silicon chain is connected with the control bus, so that direct current output by the charging device is subjected to voltage reduction treatment and is output to the control bus.
2. The dc power supply circuit for a photovoltaic power plant according to claim 1, further comprising a plurality of first dc air switches HK and a plurality of second dc air switches KK, wherein the inputs of the first dc air switches HK are connected to the power bus bar and the inputs of the second dc air switches KK are connected to the control bus bar.
3. The direct-current power supply circuit applied to the photovoltaic power station is characterized by further comprising a current divider FL1, a Hall sensor H1, a battery switch and a battery switch +, wherein the negative pole of the storage battery is connected to the negative pole line of the power bus after passing through the battery switch, the Hall sensor H1 and the current divider FL1 in sequence, and the positive pole of the storage battery is connected to the positive pole line of the power bus after passing through the battery switch.
4. The direct-current power supply circuit applied to the photovoltaic power station, according to claim 1, is characterized in that the circuit further comprises a Hall sensor H2 and a current divider FL2, the negative output end of the buck silicon chain is connected to the negative line of the control bus after passing through the Hall sensor H2 and the current divider FL2 in sequence, and the positive output end of the buck silicon chain is directly connected to the positive line of the control bus.
5. The direct-current power supply circuit applied to the photovoltaic power station as claimed in claim 1, wherein the circuit further comprises a lightning protection device, and the lightning protection device is connected to the three-phase power bus after passing through a knob switch QF 3.
6. The direct-current power supply circuit applied to the photovoltaic power station is characterized by comprising two paths of three-phase alternating-current power supplies, wherein the two paths of three-phase alternating-current power supplies are operated redundantly, and one path of three-phase alternating-current power supply is controlled to be connected to a three-phase power supply bus as an input power supply through an alternating-current contactor mutual switching device.
7. The dc power supply circuit applied to a photovoltaic power station as claimed in claim 1, wherein the number of the charging devices is two, and the input ends of the two charging devices are connected to the three-phase power bus bar, and the output ends of the two charging devices are connected to the power bus bar.
8. The direct-current power supply circuit applied to the photovoltaic power station as claimed in claim 1, wherein the charging device is a charging device with the model number TH230D10 NZ-D.
9. The DC power supply circuit for photovoltaic power station as claimed in claim 1, wherein the lightning protection device is LS1-CP/40KA 4P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457926.6A CN110797964A (en) | 2019-05-29 | 2019-05-29 | Direct-current power supply circuit applied to photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457926.6A CN110797964A (en) | 2019-05-29 | 2019-05-29 | Direct-current power supply circuit applied to photovoltaic power station |
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| Publication Number | Publication Date |
|---|---|
| CN110797964A true CN110797964A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910457926.6A Pending CN110797964A (en) | 2019-05-29 | 2019-05-29 | Direct-current power supply circuit applied to photovoltaic power station |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509657B1 (en) * | 2000-02-25 | 2003-01-21 | Intel Corporation | Battery backup unit system and interface |
| CN103219766A (en) * | 2013-04-08 | 2013-07-24 | 国家电网公司 | Non floating charge lithium battery type DC (direct current) power system used for station |
| CN107612127A (en) * | 2016-12-20 | 2018-01-19 | 合肥亚飞电力设备有限公司 | A kind of DC power supply panel of modern high security |
| CN207650266U (en) * | 2017-10-16 | 2018-07-24 | 维谛技术有限公司 | A kind of current monitoring circuit |
| CN207732514U (en) * | 2018-01-25 | 2018-08-14 | 青田宇电科技有限公司 | A kind of direct current cabinet |
| CN208127981U (en) * | 2018-03-29 | 2018-11-20 | 黑龙江省宝泉岭电业局 | A kind of DC power supply |
| CN208767847U (en) * | 2018-06-27 | 2019-04-19 | 深圳蓝信电气有限公司 | A kind of UPS of pair of battery under-voltage protection point Intelligent Dynamic variation |
-
2019
- 2019-05-29 CN CN201910457926.6A patent/CN110797964A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509657B1 (en) * | 2000-02-25 | 2003-01-21 | Intel Corporation | Battery backup unit system and interface |
| CN103219766A (en) * | 2013-04-08 | 2013-07-24 | 国家电网公司 | Non floating charge lithium battery type DC (direct current) power system used for station |
| CN107612127A (en) * | 2016-12-20 | 2018-01-19 | 合肥亚飞电力设备有限公司 | A kind of DC power supply panel of modern high security |
| CN207650266U (en) * | 2017-10-16 | 2018-07-24 | 维谛技术有限公司 | A kind of current monitoring circuit |
| CN207732514U (en) * | 2018-01-25 | 2018-08-14 | 青田宇电科技有限公司 | A kind of direct current cabinet |
| CN208127981U (en) * | 2018-03-29 | 2018-11-20 | 黑龙江省宝泉岭电业局 | A kind of DC power supply |
| CN208767847U (en) * | 2018-06-27 | 2019-04-19 | 深圳蓝信电气有限公司 | A kind of UPS of pair of battery under-voltage protection point Intelligent Dynamic variation |
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Application publication date: 20200214 |
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