CN100589299C - Power supply system of DC source for isolating fault - Google Patents
Power supply system of DC source for isolating fault Download PDFInfo
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- CN100589299C CN100589299C CN200610135414A CN200610135414A CN100589299C CN 100589299 C CN100589299 C CN 100589299C CN 200610135414 A CN200610135414 A CN 200610135414A CN 200610135414 A CN200610135414 A CN 200610135414A CN 100589299 C CN100589299 C CN 100589299C
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Abstract
The invention discloses one direct current power supply system to isolate fault, which comprises direct current screen, direct current mother line, direct current power device and switch cabinet, wherein, the direct current screen input end is connected to alternating power and the output end is connected to mother wire; several direct current power device input end is connected to direct mother line with each output end as direct power for switch cabinet; the direct power device has memory battery.
Description
Technical field
The invention belongs to the power supply technique field, but relate to the power supply system of DC source of the isolated fault that is used for power engineering, be applicable to demanding transformer station of DC power supply and power plant etc.
Background technology
Because direct current cabinet is usually by 106～108 (no end cells) or 118～120 (end cell is arranged) cell series-feds (backup battery); so numerous batteries is cascaded; not only structural volume is big; it is big to take up room; and cost costliness; so; traditional power engineering can't be equipped with a DC power supply (direct current cabinet) for each switch cubicle; and can only adopt the concentration supply power mode; as shown in Figure 1; be directly by the charging module of direct current cabinet 1 inside through the energy storage motor 31 of dc bus 2 to switch cubicle 3 inside; closing coil 32; switching winding 33; Microcomputer Protection 34; signal lamp 35 and other electrical appliances 36 provide 220V DC power supply; this supply power mode is mainly used in transformer stations at different levels and firepower; hydraulic power plant; as the power supply of control load and living load and direct current emergency lighting etc., be electric power system control; the basis of protection.The reliability of DC power supply itself is very crucial for the reliable and stable operation of electric power system.
But traditional supply power mode is also unsatisfactory aspect reliability, and the subject matter of existence has:
One, break down when a certain loop of system, such as when the electrical appliance of switch cubicle 3 inside because short circuits etc. are former thereby when causing power-fail, will influence the operate as normal in other loop of system, the electric power system poor reliability;
Two, when direct current cabinet 1 initiating failure and when causing power-fail, also can influence the electrical appliance operate as normal of switch cubicle 3 inside for a certain reason; Can reduce the failure rate that causes because of direct current cabinet 1 although increase the number of direct current cabinet 1, but thus, system cost will significantly rise, and still exist dc bus 2 to break down and the possibility of all direct current cabinet 1 simultaneous faultss, so the electric power system reliability is still relatively poor;
Three, direct current cabinet 1 is usually by 106～108 (no end cells) or 118～120 (end cell is arranged) cell series-feds (backup battery), if wherein a capacity descends backward, then show as internal resistance increase, severe patient and be equivalent to open circuit, cause whole Battery pack not play a role, whole power-fail, poor reliability;
Therefore, change existing DC power supply method, improve system reliability, be necessary in fact.
Summary of the invention
The power supply system of DC source that the purpose of this invention is to provide a kind of isolated fault improves system reliability, and cost reduces.
To achieve these goals, solution of the present invention is:
The power supply system of DC source of isolated fault, comprise direct current cabinet, dc bus, continuous-current plant and switch cubicle, the input termination AC power of direct current cabinet, the output termination dc bus of direct current cabinet, the input of some continuous-current plants is connected in parallel on the dc bus, the output of each continuous-current plant provides DC power supply to the electrical appliance of switch cubicle inside respectively, and continuous-current plant carries storage battery.
Above-mentioned continuous-current plant is made up of DC/DC input module, DC/DC boost module, charging module, storage battery, DC/DC step-down module and CPU module six parts; The input of DC/DC input module connects dc bus, and the output of DC/DC input module connects the input of DC/DC step-down module; The input of charging module also connects dc bus, the output output dc low-voltage of charging module is for CPU module work and charge in batteries, and the output of charging module connects the input of DC/DC boost module, and the output of DC/DC boost module also connects the input of DC/DC step-down module; The output output DC of DC/DC step-down module is for the electric loading of using of switch cubicle inside; The output of CPU module output signal respectively is used to control DC/DC input module, DC/DC boost module, DC/DC step-down module, charging module and battery-operated.
The DC/DC input module of above-mentioned continuous-current plant, DC/DC boost module, charging module, storage battery, DC/DC step-down module and CPU module are installed in the same space, form the power supply body.
The display of above-mentioned CPU module and power supply body are installed separately, and the display of CPU module is installed on the instrument door-plate of switch cubicle.
After adopting above-mentioned electric power system, the present invention provides working power by the charging module of direct current cabinet inside for dc bus when mains supply; When electrical network can not be powered, provide working power for dc bus by the backup battery of direct current cabinet inside; When breaking down, direct current cabinet maybe needs between maintenance, limber up period, storage battery by continuous-current plant inside provides direct current operative power source for switch cubicle, also can pass through suitable switch interlocking gear simultaneously, with the electric dc bus of the output feedback of continuous-current plant, satisfy other device needs for electricity to direct current cabinet.
The present invention compares with traditional direct current cabinet electric power system, has following advantage:
One, each face switch cubicle has all disposed the continuous-current plant of a platform independent, when the electrical appliance of switch cubicle inside causes power failure for a certain reason, can not exert an influence to direct current cabinet and dc bus with Fault Isolation in this switch cubicle inside;
Two, when direct current cabinet, dc bus for a certain reason during initiating failure, continuous-current plant can not exert an influence to switch cubicle inside electrical appliance with Fault Isolation in the bus zone;
Three, when continuous-current plant breaks down, have only the electrical appliance of relevant therewith switch cubicle inside to be affected, other parts of system are unaffected, thereby make fault reduce to minimum;
Four, the storage battery of continuous-current plant inside is compared with direct current cabinet 106～108 (no end cells) or 118～120 (end cell is arranged) cell series-feds usually by 12 cell series-feds, and reliability is better;
Five, whole electric power system only needs a direct current cabinet cooperate a plurality of continuous-current plants, only several thousand yuan of direct current cabinet cost nearly 100,000 yuan and continuous-current plant costs, and cost of investment is lower.
In a word, electric power system of the present invention is because of being connected a continuous-current plant with storage battery increasing between each face switch cubicle and the dc bus, like this, can isolated fault by continuous-current plant, and can at utmost guarantee the working power of switch cubicle the reliability of system to be improved greatly by the storage battery of continuous-current plant inside.
Description of drawings
Fig. 1 is the structural representation of traditional direct current cabinet concentration supply power system;
Fig. 2 is the structural representation of the power supply system of DC source of isolated fault of the present invention;
Fig. 3 is the structural representation of continuous-current plant among the present invention;
Fig. 4 is a continuous-current plant DC/DC input module circuit diagram among the present invention;
Fig. 5 is a continuous-current plant DC/DC boost module circuit diagram among the present invention;
Fig. 6 is a continuous-current plant DC/DC step-down module circuit diagram among the present invention;
Fig. 7 is a continuous-current plant charging module circuit diagram among the present invention;
Fig. 8 is the circuit diagram of continuous-current plant CPU module among the present invention.
Embodiment
See also the power supply system of DC source of isolated fault shown in Figure 2, disclosed, comprise direct current cabinet 1, dc bus 2, continuous-current plant 4 and switch cubicle 3.These continuous-current plant 4 concrete which kind of structures that adopt are not subjected to limit shown in this paper; as long as have storage battery 44; like this; the structure of whole power supply system of DC source as shown in Figure 2; the input INPUT of direct current cabinet 1 meets AC power AC380V/220V; the output OUTPUT of direct current cabinet 1 meets dc bus 2 (BUS+; BUS-); DC220V is delivered to dc bus 2; some continuous-current plant 4 (1# to N#; concrete number is decided by design) input be connected in parallel on the dc bus 2; continuous-current plant 4 carries storage battery 44; the output of each continuous-current plant 4 is connected to switch cubicle 3 respectively, makes dc bus 2 through the energy storage motor 31 of continuous-current plant 4 to switch cubicle 3 inside; closing coil 32; switching winding 33; Microcomputer Protection 34; signal lamp 35 and other electrical appliances 36 provide 220V DC power supply.The present invention because in traditional DC power-supply system between each face switch cubicle 3 and the dc bus 2 increase be connected a continuous-current plant 4, the reliability of system is improved greatly.
It is good that continuous-current plant 4 adopts structure shown in Figure 3.Continuous-current plant 4 is made up of DC/DC input module 41, DC/DC boost module 42, charging module 43, storage battery 44, DC/DC step-down module 45 and CPU module 46 6 parts.Wherein, DC/DC input module 41 can be as shown in Figure 4, DC/DC boost module 42 can be as shown in Figure 5, charging module 43 can be as shown in Figure 6, DC/DC step-down module 45 can be as shown in Figure 7, CPU module 46 can be as shown in Figure 8, but the structure of each module all is a prior art, not limited by this paper legend.The key of continuous-current plant 4 is annexations of each module: the input of DC/DC input module 41 connects external power source (dc bus 2, DC220V), the output of DC/DC input module 41 output high direct voltage 300VDC is to the input that connects DC/DC step-down mold pressing 45; The input of charging module 43 also connects external power source (dc bus 2,220V DC), the output output dc low-voltage 30V of charging module 43 is for 46 work of CPU module and storage battery 44 chargings, and the output of charging module 43 connects the input of DC/DC boost module 42, the input of output output high direct voltage 290V to the DC/DC step-down module 45 of DC/DC boost module 42.The output output 220V direct current of DC/DC step-down module 45 is for the electric loading of using of switch cubicle 2 inside, as energy storage motor 31, closing coil 32, switching winding 33, Microcomputer Protection 34, signal lamp 35 and other electrical appliances 36; The output of CPU module 46 output signal respectively is used to control DC/DC input module 41, DC/DC boost module 42, DC/DC step-down module 45, charging module 43 and storage battery 44 work, CPU module 46 can leave communication output (RS485/RS232), provides this DC power system working state signal for remote maintenance and management.
When this continuous-current plant 4 uses, if external power source (direct current cabinet 1 and dc bus 2) is normal, by direct current cabinet 1 and dc bus 2 power supplies, through DCDC input module 41 and DCDC step-down module 45, working power is provided for switch cubicle 3, if external power source (direct current cabinet 1 and dc bus 2) breaks down, by storage battery 44 power supplies, through DCDC boost module 42 and DCDC step-down module 45, provide working power to switch cubicle 3, make system reliability higher.
The present invention can be further be installed in DC/DC input module 41, DC/DC boost module 42, charging module 43, storage battery 44, DC/DC step-down module 45 and the CPU module 46 of continuous-current plant 4 in the same space of switch cubicle 4 in the lump, form the micro power body, both can guarantee power output, avoid the phenomenon of generating heat; Also the display of power supply body (containing storage battery 44) with CPU element 46 spatially can be separated, the display of CPU module 46 is installed in the instrument door-plate, make the power supply body can be installed in the another one separate space, storage battery 44 is not installed in the instrument box, and then eliminates the hidden danger such as influence of storage battery to other electrical appliances of instrument box inside.
Claims (4)
1, the power supply system of DC source of isolated fault, it is characterized in that: comprise direct current cabinet, dc bus, continuous-current plant and switch cubicle, the input termination AC power of direct current cabinet, the output termination dc bus of direct current cabinet, the input of some continuous-current plants is connected in parallel on the dc bus, the output of each continuous-current plant provides DC power supply to the electrical appliance of switch cubicle inside respectively, and continuous-current plant carries storage battery.
2, the power supply system of DC source of isolated fault according to claim 1, it is characterized in that: continuous-current plant is made up of DC/DC input module, DC/DC boost module, charging module, storage battery, DC/DC step-down module and CPU module six parts; The input of DC/DC input module connects dc bus, and the output of DC/DC input module connects the input of DC/DC step-down mold pressing; The input of charging module also connects dc bus, the output output dc low-voltage of charging module is for CPU module work and charge in batteries, and the output of charging module connects the input of DC/DC boost module, and the output of DC/DC boost module also connects the input of DC/DC step-down module; The output output DC of DC/DC step-down module is for the regular load of switch cubicle; The output of CPU module output signal respectively is used to control DC/DC input module, DC/DC boost module, DC/DC step-down module, charging module and battery-operated.
3, as the power supply system of DC source of isolated fault as described in the claim 2, it is characterized in that: the DC/DC input module of continuous-current plant, DC/DC boost module, charging module, storage battery, DC/DC step-down module and CPU module are installed in the same space, form the power supply body.
4, as the power supply system of DC source of isolated fault as described in the claim 3, it is characterized in that: the display of CPU module and power supply body are installed separately, and the display of CPU module is installed on the instrument door-plate of switch cubicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610135414A CN100589299C (en) | 2006-12-29 | 2006-12-29 | Power supply system of DC source for isolating fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610135414A CN100589299C (en) | 2006-12-29 | 2006-12-29 | Power supply system of DC source for isolating fault |
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| CN101013814A CN101013814A (en) | 2007-08-08 |
| CN100589299C true CN100589299C (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200610135414A Expired - Fee Related CN100589299C (en) | 2006-12-29 | 2006-12-29 | Power supply system of DC source for isolating fault |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101841170B (en) * | 2008-12-25 | 2016-04-27 | 厦门蓝溪科技有限公司 | A kind of storage battery parallel power supply method |
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Owner name: XIAMEN LANXI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: XIAO YANYI Effective date: 20090703 |
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Effective date of registration: 20090703 Address after: Room 221, Pioneer Building, Pioneer Park, torch hi tech Zone, Fujian, Xiamen: 361000 Applicant after: Xiamen Lanxi Technology Co., Ltd. Address before: Siming District Xiamen city Fujian province Qian Pu two No. 7 room 701 post encoding: 361000 Applicant before: Xiao Yanyi |
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Granted publication date: 20100210 Termination date: 20161229 |