CN1035911C - A spot-network distribution system and a operation method thereof - Google Patents
A spot-network distribution system and a operation method thereof Download PDFInfo
- Publication number
- CN1035911C CN1035911C CN94107980A CN94107980A CN1035911C CN 1035911 C CN1035911 C CN 1035911C CN 94107980 A CN94107980 A CN 94107980A CN 94107980 A CN94107980 A CN 94107980A CN 1035911 C CN1035911 C CN 1035911C
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- circuit breaker
- distribution wire
- distribution
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- wire
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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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- Business, Economics & Management (AREA)
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
To provide a spot network power receiving and transforming apparatus in the type of ensuring continuous operation without resulting in such inconvenience as temporary power failure of facility to the load or load limination even when one power distribution line of the power source side fails. Two pairs of network facilities (2A, 2B) are prepared, two units of power receiving and disconnecting switches 3A, 3B and two units of receiving voltage detectors 7A, 7B are respectively provided for these network facilities 2A, 2B, the second power receiving and disconnecting switch 3B is connected to the third power receiving side network power distributing line 1C as a spare line. When one network power distribution lines in the power receiving side fails, it is detected with the receiving voltage detector to switch the power receiving and disconnecting switch to the spare line side.
Description
The invention relates to LAN distribution system, the particularly distribution system of skyscraper and factory, locally need very big load and stable power at these.
Recently, the three-dimensional utilization in soil and skyscraper become more general.In skyscraper, much less the distribution of electric loading is bigger in vertical direction, and very big load needs are arranged, and the electrical installation of many daily uses has been installed.Therefore, require to improve the reliability and the fail safe of power supply more consumingly.In addition, electrical installation often is installed in the zone of dense construction, requires the shared space, place of these devices as much as possible little.Like this, the spot-network distribution system that power supply reliability is high just just in time is suitable for having like this such as building and factory the place of very big burden requirement.Spot-network distribution system be one by several systems that receive the power supply of 22KV (kilovolt) or 33KV from the distribution wire of transformer station by 2 to 4 area power grid unit; a reception circuit breaker is arranged in the upstream of network transformer; there is a protective circuit breaker in each downstream at network transformer; the output of protective circuit breaker is connected on the electrical network bus (simply claiming bus), this system by several link feeder line on the bus power distribution on each power consumer apparatus.The routine techniques of relevant spot-network distribution system is illustrated in publication number is 198524/1988 Japanese patent application.Adopted the mode of three area power grid unit in the conventional spot-network distribution system.Yet, because it needs the network transformer of three certain high pressure, so this mode cost height, it also has a problem is exactly that power distribution station will account for bigger space, place.
For avoiding the problems referred to above, as shown in Figure 4, design is applied to adopt the spot-network distribution system of two area power grid unit, two area power grid unit are wherein arranged, each area power grid unit (be called for short electrical network unit) has: receive circuit breaker 22, receive insurance 23, transformer 25 and circuit breaker 26, receive electric energy among its from conventional distribution wire 21A and preparation distribution wire 21B a certain.Under the situation of conventional distribution wire 21A outage, electric energy receives line and is transferred to preparation distribution wire 21B from conventional distribution wire 21A.In addition, at many local network distribution systems that require and use the two area power grid power supply units of employing of simple form, reception circuit breaker is wherein substituted by fuse.
Yet the spot-network distribution system of the two electrical network unit of conventional employing mode has a problem, is exactly under the situation of down circuitry, though all interruption of power supply can both avoid a transformer can not distribution this cause limit load sometimes.And in the spot-network distribution system of the simple form of the two electrical network unit of above-mentioned employing mode, all outages are caused by conventional distribution wire outage.Certainly, just again can be on one side when the reception circuit breaker being transferred to standby distribution wire to having loaded distribution.Therefore, in any of the spot-network distribution system of the two electrical network unit of the employing mode of the spot-network distribution system of the two electrical network unit of the employing of routine mode and above-mentioned simple form, all can produce some load distribution obstacles.
Consider the problems referred to above, finished the present invention, its objective is the spot-network distribution system that a kind of cheapness is provided, can not bring during this system works, even when a certain distribution wire cuts off the power supply, also can not such as load distribution obstacles such as short supply interruption, limit loads.
Spot-network distribution system of the present invention; this system passes through the electrical network unit from the bussed supply of a plurality of power supply distribution wires to said spot-network distribution system; all there is a protective circuit breaker each electrical network unit, is connected to described distribution wire one side by network transformer and it is characterized in that this system comprises:
Said a plurality of electrical networks unit is connected on said a plurality of distribution wire;
In each said electrical network unit first and second receives circuit breaker, each be connected respectively in said a plurality of distribution wire one not collinear on;
A pair of reception voltage detector is used for detecting described first and second power status that the distribution wire that provides on each is provided in the circuit breakers;
Switching device is used for when being connected to the distribution wire outage of the said first reception circuit breaker electric energy being received line and is transferred to the distribution wire that links to each other with the said second reception circuit breaker from being connected to said first distribution wire that receives circuit breaker.
The present invention moves the method for spot-network distribution system, it is characterized in that comprising step: when being connected to the distribution wire outage of the said first reception circuit breaker electric energy is received line and be transferred on the distribution wire that links to each other with the said second reception circuit breaker from being connected to said first distribution wire that receives circuit breaker.
After the reparation said electric energy received line from switching when outage takes place come and use second receive the said distribution wire that circuit breaker links to each other and be transferred on the distribution wire that links to each other with the said first reception circuit breaker.
In a preferred embodiment of above-mentioned spot-network distribution system, provide two electrical network unit, second of each electrical network unit receives circuit breaker and all is connected to same as on the 3rd distribution wire of siding.
In having the spot-network distribution system of said structure, the reception circuit breaker that the electrical network unit links to each other with that root distribution wire that outage takes place disconnects, and electric energy is supplied with by another or other several electrical networks unit.And behind second circuit breaker that first circuit breaker is transferred to standby distribution wire links to each other that the reception circuit breaker is linked to each other by that root distribution wire with the generation outage, all electrical network unit are got back to operating state again.
By the above-mentioned running of spot-network distribution system of the present invention, even under the situation of a certain distribution wire outage, another or all the other several electrical networks unit also only can short-time overloads, and can not produce such as obstacles such as power failure, limit load in short-term.
Fig. 1 is the single-lined diagram of an embodiment of expression spot-network distribution system of the present invention.
Fig. 2 is the single-lined diagram of another embodiment of spot-network distribution system of the present invention.
The conversion of operation state of the main element of spot-network distribution system of the present invention when Fig. 3 represents that outage takes place for conventional distribution wire 1A.
Fig. 4 is the single-lined diagram of the composition of the conventional spot-network distribution system of expression.
After this, will be according to embodiment with reference to accompanying drawing to details of the present invention in advance with explanation.
Figure among Fig. 1 (single-lined diagram) is depicted as spot-network distribution system of the present invention, and it has electrical network unit 2A and 2B.In this area's network distribution system, each of electrical network unit 2A and 2B all is connected to a pair of distribution wire (1A, 1C) of area power grid power supply on (1B, 1C), receives electric energy above them.In addition, these two electrical network unit are also connected on the bus (abbreviation bus) 12 of area power grid, and bus 12 is to each power device distribution.
The distribution wire 1A of area power grid power supply and 1B are as conventional line, and the distribution wire of area power grid power supply (abbreviation distribution wire) 1C is as siding.
Each of electrical network unit 2A and 2B all comprises two reception circuit breaker 3A and 3B, network transformer 4, protection fuse 5 and a protective circuit breaker 6, and it is to bus 12 power supplies.
The reverse current element that opens circuit disconnects network relay 10 by detecting the reverse current that flows to network transformer 4 by bus 12.The pressure reduction reclosing is closed element and promptly is higher than the detected voltage by voltage detector 9B by the detected voltage of voltage detector 9A by detecting closure condition, and the phase-lead that voltage detector 9A detects comes closed network relay 10 in the detected phase place of voltage detector 9B.
These elements are by being used for disconnecting or the executive circuit of closed protective circuit breaker 6 is connected on the protective circuit breaker 6.
Receive voltage detector 7A and 7B and be positioned at the upstream that receives circuit breaker 3A and 3B, the accepting state of their monitoring distribution wires.Receive the output of voltage detector; be input in the control circuit 11; control circuit 11 by according to the distribution wire receiving status information of being monitored to receiving circuit breaker 3A and 3B and the protective circuit breaker 6 output control commands distribution wire of automatically transferring, so that receive electric energy.
In addition, control circuit 11 has the lock-in circuit of pressure reduction reclosing closing operation, and the closed procedure of protective circuit breaker 6 is temporarily locked, up to finishing the switching that receives circuit breaker 3A and 3B.
Under the situation of a certain distribution wire outage, the operating instruction of spot-network distribution system with said structure is as follows.
Receive under the condition of electric energy from distribution wire 1A and 1B respectively at electrical network unit 2A and 2B, when distribution wire 1A cut off the power supply for some reason, reverse current flowed to distribution wire 1A by electrical network unit 2B and bus 12 from distribution wire 1B, and this produces reverse potential.
Based on above-mentioned information; control circuit 11 is guaranteed following condition: (1) voltage detector 7A indicates no-voltage; receiving circuit breaker 3A disconnects; (2) voltage detector 7B indication rated voltage; receive circuit breaker 3B closure; (3) protective circuit breaker 6 closures, control circuit 11 are sent and are disconnected order and the closed order that receives circuit breaker 3B that receives circuit breaker 3A.
Through after the operation of control circuit 11; the electrical network unit enters the state that receives from standby distribution wire 1C again; the condition of closing satisfies (load is heavy and electrical network unit 2A is in running order) if pressure reduction is reclosed, and then sends close commands by network relay 10 to protective circuit breaker 6.Like this, two electrical network unit all enter operating state.
Finally, the network transformer 4 of electrical network unit 2B only has and is in overload in the short time, can continue to use power device and can not bring the obstacle that influences these devices.Receive circuit breaker and only need have the ability that stops or flowing through the exciting current of network transformer; and do not need to resemble needed on-load switch in two electrical networks unit spot-network distribution system of simple types; this is because reception circuit breaker 3A and 3B switch under the situation that protective circuit breaker 6 is disconnected by the reverse current cut-out function that electrical network had, and can reduce the construction cost of spot-network distribution system like this.
After this, if distribution wire 1A returns to the above-mentioned state of spot-network distribution system, the distribution wire that then will receive electric energy is transferred to original conventional distribution wire.In the switch over operation that takes back original distribution wire, control circuit 11 is guaranteed following condition: (1) receives voltage indicator 7A indication rated voltage, receives circuit breaker 3A and disconnects; (2) electrical network unit 2B in running order (needing this condition) to avoid whole outages; promptly in electrical network unit 2B; (receive voltage indicator 7A indication rated voltage, receive circuit breaker 3A closure and protective circuit breaker 6 closures) perhaps (receives voltage indicator 7B indication rated voltage, receives circuit breaker 3B closure and protective circuit breaker 6 closures).Then, the control circuit 11 of electrical network unit 2A sends the closed procedure that ON-and OFF-command locks protective circuit breaker 6, and sends ON-and OFF-command to receiving circuit breaker 3B, sends close commands to receiving circuit breaker 3A.
After receiving circuit breaker 3A closure, the latch-release of the closed action of protective circuit breaker 6.Like this, the condition of closing satisfies if pressure reduction is reclosed, and then protective circuit breaker 6 is by network relay 10 closures, and the first 2A of electrical network electricity gets back to original accepting state.
Nowadays, the function of above-mentioned control circuit 11 is also used computer realization easily.
It shown in Fig. 2 the unit connection diagram of the embodiment of simplified structure embodiment illustrated in fig. 1.In this embodiment, each among electrical network unit 2A and the 2B all is connected on two distribution wire 1A and the 1B by the reception circuit breaker 3A and the 3B of each electrical network unit.In electrical network unit 2A, distribution wire 1A is as conventional distribution wire, and it links to each other with reception circuit breaker 3A; Distribution wire 1B is as standby distribution wire, and it links to each other with reception circuit breaker 3B, and is in electrical network unit 2B, just in time opposite.By according to such this area's network distribution system of operating embodiment illustrated in fig. 1, even then when a certain generation outage of two distribution wires, also can operate above-mentioned spot-network distribution system, make it only to receive electric energy and also can not cause temporary transient power failure from two distribution wires.Yet although embodiment illustrated in fig. 2 with regard to construction cost have some to be better than advantage embodiment illustrated in fig. 1, the former reliability is a little lower than the latter.
The electric energy reception line that Figure 3 shows that electrical network unit 2A when outage takes place conventional distribution wire 1A is transferred under the situation of distribution wire 1C the variation of electric current, voltage or operating state in the main element of this area's network distribution system from distribution wire 1A.The variation of the circuit breaker among the electrical network unit 2A and the following operating state of disconnect is caused by distribution wire 1A outage.That is: disconnect protective circuit breaker 6 → disconnection and receive circuit breaker 3A → closure reception circuit breaker 3B → closed protective circuit breaker 6.In above-mentioned operating state change procedure, electrical network unit 2B is in overload in the short time.
Another embodiment that will illustrate below is effective to the stability that improves spot-network distribution system reception electric energy.
Generally speaking, when connecting the power consumption equipment number increase of moving on the distribution wire, required electric current also increases, and this will reduce the voltage of distribution wire.Therefore, in an embodiment, the voltage that receives voltage indicator 7A and 7B output is input in the analog comparator in the control circuit 11, and it is compared mutually by analog comparator, if the voltage of another root distribution wire is higher than the voltage of the distribution wire that is used to receive electric energy now in this electrical network unit, then be transferred on another distribution wire by electric energy being received line with the described same method of the foregoing description.
In addition, the function of comparator that is used for relatively receiving the output voltage of voltage indicator 7A and 7B has lagging characteristics, so that avoid the oscillatory occurences of distribution wire switching or unnecessary switching.
In addition, be connected on the same distribution wire and take place all to have a power failure when this root line outage for fear of two electrical network unit 2A and 2B, when the condition that is transferred to distribution wire 1C when the distribution wire of electrical network unit 2A satisfies, have only another electrical network unit 2B of affirmation not receive the switching of just carrying out distribution wire on the siding 1C.
Therefore, this embodiment has an advantage, promptly still can continue to use power consumption equipment when the outage of distribution wire and without any difficulty, the load of being shared by distribution wire has also obtained balance.
As mentioned above, the invention provides a spot-network distribution system, this system was still worked, and can not bring such as obstacles such as temporary transient power failure, limit loads to power consumption equipment.
Claims (6)
1. spot-network distribution system; from the bussed supply of a plurality of power supply distribution wires to said spot-network distribution system, all there is a protective circuit breaker each electrical network unit, by the electrical network transformation by the electrical network unit in this system; and be connected to described distribution wire one side, it is characterized in that this system comprises:
Said a plurality of electrical networks unit is connected on said a plurality of distribution wire;
In each said electrical network unit first and second receives circuit breaker, each be connected respectively in said a plurality of distribution wire one not collinear on;
A pair of reception voltage detector is used for detecting described first and second power status that the distribution wire that provides on each is provided in the circuit breakers;
Switching device is used for when being connected to the distribution wire outage of the said first reception circuit breaker electric energy being received line and is transferred to the distribution wire that links to each other with the said second reception circuit breaker from being connected to said first distribution wire that receives circuit breaker.
2. according to the said spot-network distribution system of claim 1, it is characterized in that also comprising: the control device in each said electrical network unit, it comprises: message input device, and the power status information and said first, second that are used for receiving by the detected said distribution wire of said reception voltage detector receive the opening and closing state information of circuit breaker and protective circuit breaker; And instruction sending device, being used for giving an order when a certain distribution wire generation anomaly makes said electric power receive line is transferred to normal operation by the unusual distribution wire of said appearance distribution wire; Also be used for after repairing going out order to said reception circuit breaker and the said protection remy hair that opens circuit, make said electric power receive line come by switching when outage takes place and use second receive the distribution wire that circuit breaker links to each other and be transferred to the distribution wire that links to each other with the said first reception circuit breaker.
3. according to the said spot-network distribution system of claim 1, it is characterized in that it is the distribution wire with ceiling voltage that said electric power reception line is transferred in the continuous distribution wire of said second circuit breaker.
4. method of moving spot-network distribution system, this system passes through the electrical network unit from the bussed supply of a plurality of power supply distribution wires to said spot-network distribution system, all there is a protective circuit breaker each electrical network unit, and be connected to described distribution wire one side by network transformer and it is characterized in that this system comprises: said a plurality of electrical networks unit is connected on said a plurality of distribution wire; In each said electrical network unit first and second receives circuit breaker, each be connected respectively in said a plurality of distribution wire one not collinear on; The method comprising the steps of:
A pair of reception voltage detector is used for detecting described first and second power status that the distribution wire that provides on each is provided in the circuit breakers; When being connected to the distribution wire outage of the said first reception circuit breaker electric energy being received line is transferred on the distribution wire that links to each other with the said second reception circuit breaker from being connected to said first distribution wire that receives circuit breaker.
Revise said electric energy received after multiple line from switching when outage takes place come and use second receive the said distribution wire that circuit breaker links to each other and be transferred on the distribution wire that links to each other with the said first reception circuit breaker.
5. in accordance with the method for claim 4, at said spot-network distribution system said electric power is received line and be transferred to the process of normal distribution wire, it is characterized in that it comprises the steps: from unusual fault distribution wire occurring
Affirmation is in the electrical network unit that said and said unusual distribution wire links to each other, the reception circuit breaker that links to each other with said unusual distribution wire is closed, the voltage of another distribution wire is normal, the reception circuit breaker that links to each other with said normal distribution wire disconnects, and said protective circuit breaker disconnects;
The reception circuit breaker that disconnection links to each other with said unusual distribution wire;
The reception circuit breaker that closed and said normal distribution wire links to each other;
Protective circuit breaker in the electrical network unit that closure is transferred.
6. in accordance with the method for claim 4, switching when unusual is come and the distribution wire that uses is transferred back more once occurs it is characterized in that comprising the steps: in the unusual process of now having repaired on the distribution wire by occurring said electric power to be received line at said spot-network distribution system
Affirmation with electrical network unit that the unusual distribution wire of said appearance links to each other in, open with the reception circuit breaker that said unusual distribution wire links to each other, the voltage of said distribution wire is normal;
Affirmation all is in normal operating conditions in all remaining electrical network unit on the next door, electrical network unit that above-mentioned and said unusual distribution wire links to each other;
Disconnect the protective circuit breaker of the electrical network unit of carrying out switching;
Lock the disconnection action of above-mentioned protective circuit breaker;
Disconnection with the reception circuit breaker that switching when unusual is come and the distribution wire that uses links to each other appears;
The closed reception circuit breaker that links to each other with the distribution wire of once now having repaired unusually;
Closed above-mentioned protective circuit breaker.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP181260/93 | 1993-07-22 | ||
| JP05181260A JP3102535B2 (en) | 1993-07-22 | 1993-07-22 | Spot network substation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1099529A CN1099529A (en) | 1995-03-01 |
| CN1035911C true CN1035911C (en) | 1997-09-17 |
Family
ID=16097598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94107980A Expired - Fee Related CN1035911C (en) | 1993-07-22 | 1994-07-19 | A spot-network distribution system and a operation method thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3102535B2 (en) |
| KR (1) | KR0185242B1 (en) |
| CN (1) | CN1035911C (en) |
| TW (1) | TW358251B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100419261B1 (en) * | 2001-10-23 | 2004-02-21 | 한국전력공사 | apparatus for protecting ground fault of low voltage bus in spot network system |
| AT504659B1 (en) * | 2006-12-22 | 2008-07-15 | Moeller Gebaeudeautomation Gmb | ELECTRICAL INSTALLATION ARRANGEMENT AND METHOD FOR OPERATING AN ELECTRICAL INSTALLATION ARRANGEMENT |
| CN101755373B (en) * | 2007-07-24 | 2013-11-13 | 西门子公司 | Protective device and method for operating a protective device |
| US8038326B2 (en) | 2010-01-14 | 2011-10-18 | Yuan-Shun Hsu | Ornamental lamp |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2313118A (en) * | 1941-08-09 | 1943-03-09 | Westinghouse Electric & Mfg Co | Electrical protective distribution system |
-
1993
- 1993-07-22 JP JP05181260A patent/JP3102535B2/en not_active Expired - Fee Related
-
1994
- 1994-07-06 TW TW083106170A patent/TW358251B/en active
- 1994-07-15 KR KR1019940017060A patent/KR0185242B1/en not_active IP Right Cessation
- 1994-07-19 CN CN94107980A patent/CN1035911C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2313118A (en) * | 1941-08-09 | 1943-03-09 | Westinghouse Electric & Mfg Co | Electrical protective distribution system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0739070A (en) | 1995-02-07 |
| KR0185242B1 (en) | 1999-05-15 |
| KR950004674A (en) | 1995-04-18 |
| JP3102535B2 (en) | 2000-10-23 |
| CN1099529A (en) | 1995-03-01 |
| TW358251B (en) | 1999-05-11 |
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