CN106026348B - Low voltage liaison net circuit system and its operating method - Google Patents
Low voltage liaison net circuit system and its operating method Download PDFInfo
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- CN106026348B CN106026348B CN201610578277.1A CN201610578277A CN106026348B CN 106026348 B CN106026348 B CN 106026348B CN 201610578277 A CN201610578277 A CN 201610578277A CN 106026348 B CN106026348 B CN 106026348B
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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
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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- Engineering & Computer Science (AREA)
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
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Abstract
Present invention is disclosed a kind of low voltage liaison net circuit system when traditional low voltage liaison net loop control principle more rationally, the safety of the more reliable guarantee operation of falling power transmission, maloperation can effectively be prevented, this electric substation is saved simultaneously to the interlocking line between adjacent electric substation, and eliminating the too long induced electricity brought of interlocking line influences.
Description
Technical field
The present invention relates in cement industry field of electrical control.
Background technology
The novel production line of cement is made of multiple processes, mainly including feed proportioning, raw material grinding, firing system, cement
Grinding system etc.；Production line main electric power load is two stage loads, also part primary load and three stage loads；According to load
Property and electricity capacity, production line power supply plan generally add diesel-driven generator using single supply, and distribution system is using emanant；For
Production and overhaul of the equipments electricity consumption need, and according to power supply reliability and using electricity wisely principle, general electric substation can be (two internal
Electric substation more than transformer) or the setting low voltage liaison net line between adjacent electric substation；In cement producing line day-to-day operation and inspection
During repairing, by low voltage liaison net line fall power transmission the frequency also compare it is more.
Generally using dual power supply converting system between emergency power supply and normal power source, to prevent paired running measure, double electricity
There are one mechanically and electrically interlock systems, during power supply switches, interlocking between breaker or disconnecting switch for source converting system two
System can prevent parallel running risk；And low voltage liaison net circuit does not have mechanical interlocking, will not use automatic conversion, it is past
Fall electricity for which side, electric specialty operating personnel is needed to go to judge and operate, but have electric interlock to prevent maloperation, prevent from transporting side by side
Row；Low voltage liaison net circuit electric interlock general condition is exactly that interconnection switch both sides low-voltage bus bar cannot have electricity simultaneously, in schematic diagram
In be exactly that two sections of busbar service entrance switch normally closed contact parallel connections are accessed into interconnection switch closing circuits or under-voltage protection circuit, as connection
The combined floodgate condition of network switch, if both sides low-voltage bus bar service entrance switch is all in closed state, then interconnection switch is cannot to close
Lock.Although basic control thought be to, the distribution system having is more complicated, on same busbar may there are two join
Network switchs, and therefore, both sides low-voltage bus bar service entrance switch normally closed contact parallel connection simply is accessed interconnection switch closing circuit or is owed
Press protective loop unreasonable, it is impossible to ensure the safety for the operation of falling power transmission, if in addition, Liang Ge electric substations are distant, between
Interconnection can be very long, influences safety there may be induced electricity when more than certain distance；Therefore, rational low voltage liaison net circuit
Control principle to fall power transmission safety it is most important.
Invention content
The technical problems to be solved by the invention are that realization is a kind of based on existing cement producing line day-to-day operation and maintenance
It needs, ensures the safety of power transmission, using new control thought, improve the safety for the operation of falling power transmission, prevent maloperation, simultaneously
This electric substation is saved to the interlocking line between adjacent electric substation, the too long low voltage liaison net that induced electricity is brought to influence of interlocking line is eliminated and returns
Road control circuit.
To achieve these goals, the technical solution adopted by the present invention is：Low voltage liaison net circuit system, this electric substation it is low
Pressure busbar connects this inlet wire of substation by service entrance switch, and the low-voltage busbar of described electric substation is by being equipped with the connection of circuit breaker Q 1
The low-voltage busbar of the adjacent electric substation of network cable connection, the 1 link cable side fuse of circuit breaker Q connect the pin 3 of change-over switch
With 11, draw the pin 7 and 15 that zero curve connects the change-over switch, the 1 low-voltage bus bar side fuse of circuit breaker Q connects the conversion and opens
The pin 1 and 9 of pass draws the pin 5 and 13 that zero curve connects the change-over switch, and the 1 link cable side of circuit breaker Q connects meter,
The meter fire wire output end connects the pin 10 and 4 of the change-over switch, and the meter zero line output end connects the conversion
The pin 8 and 14 of switch；It is defeated that the normally opened auxiliary contact of the circuit breaker Q 1 and the coil-end of relay K1 are connected on meter firewire
Between outlet and zero line output end；
The coil-end of under-voltage relay KV2 is connected on the firewire that the 1 link cable side of circuit breaker Q is drawn, it is described disconnected
The coil-end of under-voltage relay KV1, the trip line of the circuit breaker Q 1 are connected on the firewire that road device Q1 low-voltage bus bars side is drawn
Enclose the pin 6 and 16 of one end access change-over switch, the other end of the tripping coil through relay K1 normally-closed contacts, in parallel owe
Potential relay KV1 normally-closed contacts and relay K1 normally opened contacts, the pin of under-voltage relay KV2 normally opened contacts access change-over switch
12, and the tripping coil end passes through relay K1 normally opened contacts, under-voltage relay KV1 normally opened contacts, under-voltage relay in parallel
The pin 2 of KV2 normally-closed contacts and relay K1 normally opened contacts access change-over switch.
The change-over switch is LW5D-16DO723/3 type change-over switches.
The coil-end of the relay K1 is parallel with indicator light A, the firewire that the 1 link cable side of circuit breaker Q is drawn
On be connected to indicator light 2, be connected to indicator light 1 on the firewire that the 1 low-voltage bus bar side of circuit breaker Q is drawn.
The indicator light A is green indicator light, and the indicator light 1 and indicator light 2 are white indicating light.
The meter is equipped with the collecting unit of 1 link cable side triple line row's electric signal of acquisition circuit breaker Q.
Operating method based on the low voltage liaison net circuit system：
Send an operation：
Determination step：When adjacent electric substation's low-voltage bus bar out of power, need from this electric substation power transmission when, the necessary condition of power transmission
It is：This electric substation low-voltage bus bar has electricity, offside low-voltage bus bar out of power, while this side service entrance switch is in "on" position；
Perform step：After above three condition is met, change-over switch is got into this electric substation, then carry out closing operation,
After confirming this side interconnection switch closing success, corresponding interconnection switch then is closed to adjacent electric substation, completes the operation of falling power transmission；
It is electrically operated：
Determination step：When this side low-voltage bus bar out of power, need from offside fall electricity when, electric necessary condition is：This side is low
Busbar out of power is pressed, offside low-voltage bus bar has electricity, while this side service entrance switch and the other interconnection switches in this side are in gate-dividing state；
Perform step：It first has to confirm that the corresponding interconnection switch of adjacent electric substation has been completed to close a floodgate, is then return to this power transformation
Institute determines whether to meet aforementioned four condition, change-over switch is got to adjacent electric substation after confirmation is feasible, finally carries out closing connection
Network switchs.
The advantage of the invention is that this system is more reasonable than traditional low voltage liaison net loop control principle, more reliable guarantor
The safety for the operation of falling power transmission is demonstrate,proved, can effectively prevent maloperation, while save this electric substation to the connection between adjacent electric substation
Locking wire, eliminating the too long induced electricity brought of interlocking line influences.
Description of the drawings
The content of width attached drawing expression every in description of the invention is briefly described below：
Fig. 1 is distribution system schematic diagram；
Fig. 2 is low voltage liaison net circuit system schematic diagram.
Specific embodiment
This system improves the safety for the operation of falling power transmission, prevents maloperation, can be with for falling power transmission between electric substation
This electric substation is saved to the interlocking line between adjacent electric substation, eliminating the too long induced electricity brought of interlocking line influences, and improving can
By property." this electric substation " abbreviation " this side " below, " adjacent electric substation " abbreviation " offside ".
Low voltage liaison net circuit Novel control principle is mainly a second part and two second part, and the low-voltage busbar of this electric substation is led to
It crosses service entrance switch and connects this inlet wire of substation (second part), wherein two second part include interconnection switch both sides power monitoring system
And interlock system.
Interlock system：Change-over switch is used as LW5D-16DO723/3 type change-over switches, as shown in Fig. 2, this electric substation
Low-voltage busbar the low-voltage busbar of adjacent electric substation, 1 link cable of circuit breaker Q are connected by being equipped with the link cable of circuit breaker Q 1
Side fuse connects the pin 3 and 11 of change-over switch, draws the pin 7 and 15 that zero curve connects the change-over switch, and 1 low pressure of circuit breaker Q is female
Line side fuse connects the pin 1 and 9 of the change-over switch, draws the pin 5 and 13 that zero curve connects the change-over switch, circuit breaker Q 1
Network cable side connects meter, and meter fire wire output end connects the pin 10 and 4 of the change-over switch, the connection of meter zero line output end
The pin 8 and 14 of change-over switch；It is defeated that the normally opened auxiliary contact of circuit breaker Q 1 and the coil-end of relay K1 are connected on meter firewire
Between outlet and zero line output end；
The coil-end of under-voltage relay KV2 is connected on the firewire that 1 link cable side of circuit breaker Q is drawn, circuit breaker Q 1 is low
The coil-end of under-voltage relay KV1 is connected on the firewire that pressure bus bar side is drawn, tripping coil one end access of circuit breaker Q 1 turns
The pin 6 and 16 of switch is changed, the other end of tripping coil is normally closed through relay K1 normally-closed contacts, under-voltage relay KV1 in parallel
Contact and relay K1 normally opened contacts, the pin 12 of under-voltage relay KV2 normally opened contacts access change-over switch, and tripping coil should
End by relay K1 normally opened contacts, under-voltage relay KV1 normally opened contacts, under-voltage relay KV2 normally-closed contacts in parallel and after
Electric appliance K1 normally opened contacts access the pin 2 of change-over switch.
Interconnection switch both sides power monitoring system：The coil-end of relay K1 is parallel with indicator light A, and circuit breaker Q 1 gets in touch with electricity
Indicator light 2 is connected on the firewire that cable side is drawn, indicator light is connected on the firewire that the 1 low-voltage bus bar side of circuit breaker Q is drawn
1.Wherein indicator light A is green indicator light, and the indicator light 1 and indicator light 2 are white indicating light.It is set for convenience of monitoring meter
There is the collecting unit of 1 link cable side triple line row's electric signal of acquisition circuit breaker Q.
In Fig. 2, relay K1 normally-closed contacts and relay K1 normally opened contacts in the box of lower part are switched quoted from this side stringing,
Top box repeat circuit K1 normally-closed contacts are quoted from another interconnection switch of this side.
Operating method based on above-mentioned low voltage liaison net circuit system：
When offside low-voltage bus bar out of power, need from this side power transmission when, the necessary condition of power transmission is：This side low-voltage bus bar has
Electricity, offside low-voltage bus bar out of power, while this side service entrance switch is in "on" position, only has this three conditions, could carry out
Power transmission operates；"on" position is in as service entrance switch, is because this side low-voltage bus bar has electricity to be not necessarily at service entrance switch
In "on" position, it may be possible to which other interconnection switches, which fall, on this side bus is sent into what is come, therefore this side service entrance switch is in and closes a floodgate
State is the necessary condition that interconnection switch closes a floodgate.
When this side is toward offside power transmission, whether electric specialty operating personnel can first close a floodgate according to the condition adjudgement of indicator light,
Confirm it is feasible after change-over switch got into this side, finally carry out closing operation, after confirming this side interconnection switch closing success, then
Corresponding interconnection switch is closed to offside, completes the operation of falling power transmission；In operational process, if this side service entrance switch separating brake or this side
Interconnection switch disjunction as offside service entrance switch can all be closed a floodgate or offside be other by low-voltage bus bar dead electricity, undervoltage trip coil
Network switch closes a floodgate, it will the corresponding interconnection switch of disjunction offside does not influence this side interconnection switch.
When this side low-voltage bus bar out of power, need from offside fall electricity when, electric necessary condition is：This side low-voltage bus bar does not have
Electricity, offside low-voltage bus bar has electricity, while this side service entrance switch and the other interconnection switches in this side are in gate-dividing state, only have this
Four conditions could carry out electrically operated；Gate-dividing state is in as the other interconnection switches in this side, is because this side is other
If network switch is in "on" position, after this interconnection switch is closed, this side bus will charge, can by the other interconnection switches in this side
Energy meeting power transmission causes accident to other electric substations；If this side does not have other interconnection switches, do not need to access, it is only necessary to will be right
The terminal short circuit answered.
Offside toward this side fall electricity when, operating personnel first have to confirm that the corresponding interconnection switch of offside has been completed to close a floodgate, then
Return to this side, judge whether can to close this side interconnection switch according to LED status, confirm it is feasible after change-over switch is got to pair
Side finally carries out closing interconnection switch；In operational process, if offside low-voltage bus bar dead electricity or this side service entrance switch close a floodgate or
The other interconnection switches in this side close a floodgate, and undervoltage trip coil all can be by this side interconnection switch disjunction.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various unsubstantialities improvement or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (6)
1. low voltage liaison net circuit system, the low-voltage busbar of this electric substation connects this inlet wire of substation, feature by service entrance switch
It is：The low-voltage busbar of described electric substation connects the low pressure mother of adjacent electric substation by being equipped with the link cable of circuit breaker Q 1
Row, the 1 link cable side fuse of circuit breaker Q connect the pin 3 and 11 of change-over switch, draw zero curve and connect drawing for the change-over switch
Foot 7 and 15, the 1 low-voltage bus bar side fuse of circuit breaker Q connect the pin 1 and 9 of the change-over switch, draw zero curve and connect the conversion
The pin 5 and 13 of switch, the 1 link cable side of circuit breaker Q connect meter, and the meter fire wire output end connects the conversion
The pin 10 and 4 of switch, the meter zero line output end connect the pin 8 and 14 of the change-over switch；The circuit breaker Q 1
The coil-end of normally opened auxiliary contact and relay K1 are connected between meter fire wire output end and zero line output end；
The coil-end of under-voltage relay KV2, the breaker are connected on the firewire that the 1 link cable side of circuit breaker Q is drawn
The coil-end of under-voltage relay KV1, the tripping coil one of the circuit breaker Q 1 are connected on the firewire that Q1 low-voltage bus bars side is drawn
Terminate the pin 6 and 16 into change-over switch, the other end of the tripping coil through relay K1 normally-closed contacts, it is in parallel it is under-voltage after
Electric appliance KV1 normally-closed contacts and relay K1 normally opened contacts, the pin 12 of under-voltage relay KV2 normally opened contacts access change-over switch,
And one end of tripping coil connection relay K1 normally-closed contacts is normally opened tactile by relay K1 normally opened contacts, under-voltage relay KV1
The pin 2 of point, under-voltage relay KV2 normally-closed contacts in parallel and relay K1 normally opened contacts access change-over switch.
2. low voltage liaison net circuit system according to claim 1, it is characterised in that：The change-over switch is LW5D-16
DO723/3 type change-over switches.
3. low voltage liaison net circuit system according to claim 1 or 2, it is characterised in that：The coil-end of the relay K1
Indicator light A is parallel with, is connected to indicator light 2 on the firewire that the 1 link cable side of circuit breaker Q is drawn, the circuit breaker Q 1 is low
Indicator light 1 is connected on the firewire that pressure bus bar side is drawn.
4. low voltage liaison net circuit system according to claim 3, it is characterised in that：The indicator light A is green indicator light,
The indicator light 1 and indicator light 2 are white indicating light.
5. the low voltage liaison net circuit system according to claim 1 or 4, it is characterised in that：The meter is equipped with acquisition open circuit
The collecting unit of device Q1 link cables side triple line row's electric signal.
6. the operating method based on any one of the claim 1-5 low voltage liaison net circuit systems, it is characterised in that：
Power transmission operates：
Determination step：When adjacent electric substation's low-voltage bus bar out of power, need from this electric substation power transmission when, the necessary condition of power transmission is：
This electric substation low-voltage bus bar has electricity, offside low-voltage bus bar out of power, while this side service entrance switch is in "on" position；
Perform step：After the necessary condition for meeting above-mentioned power transmission, change-over switch is got into this electric substation, then carry out combined floodgate behaviour
Make, after confirming this side interconnection switch closing success, then close corresponding interconnection switch to adjacent electric substation, complete the behaviour of falling power transmission
Make；
It is electrically operated：
Determination step：When this side low-voltage bus bar out of power, need from offside fall electricity when, electric necessary condition is：This side low pressure is female
Line out of power, offside low-voltage bus bar has electricity, while this side service entrance switch and the other interconnection switches in this side are in gate-dividing state；
Perform step：It first has to confirm that the corresponding interconnection switch of adjacent electric substation has been completed to close a floodgate, is then return to this electric substation, sentences
The fixed necessary condition for whether meeting above-mentioned electricity, gets to adjacent electric substation by change-over switch after confirmation is feasible, is finally closed
Interconnection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610578277.1A CN106026348B (en) | 2016-07-21 | 2016-07-21 | Low voltage liaison net circuit system and its operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610578277.1A CN106026348B (en) | 2016-07-21 | 2016-07-21 | Low voltage liaison net circuit system and its operating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026348A CN106026348A (en) | 2016-10-12 |
| CN106026348B true CN106026348B (en) | 2018-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610578277.1A Active CN106026348B (en) | 2016-07-21 | 2016-07-21 | Low voltage liaison net circuit system and its operating method |
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| CN (1) | CN106026348B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137963B (en) * | 2019-06-22 | 2023-03-17 | 山东兰德勘察设计有限公司 | Power failure self-recovery method for power distribution system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762592A (en) * | 2014-01-22 | 2014-04-30 | 中山市明阳电器有限公司 | Three-incoming-line two-interconnection power distribution system |
| CN203707774U (en) * | 2014-01-22 | 2014-07-09 | 中山市明阳电器有限公司 | Power distribution system with two incoming line switches and one interconnection switch |
| CN105048304B (en) * | 2015-08-18 | 2017-08-04 | 中山市明阳电器有限公司 | The electric interlocking installation of many many mother low-voltage distribution systems of inlet wire |
| CN206164190U (en) * | 2016-07-21 | 2017-05-10 | 安徽海螺建材设计研究院 | Low pressure contact loop system |
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| CN106026348A (en) | 2016-10-12 |
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Address after: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee after: Anhui Conch Building Materials Design and Research Institute Co., Ltd. Address before: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee before: Anhui Conch Design & Research Institute of Building Materials |
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Effective date of registration: 20190610 Address after: No. 39 Cultural Road, Jinghu District, Wuhu City, Anhui Province, 241000 Co-patentee after: Anhui Conch Building Materials Design and Research Institute Co., Ltd. Patentee after: Anhui Hailuo Group LLC Co-patentee after: anhui conch cement company limited Address before: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee before: Anhui Conch Building Materials Design and Research Institute Co., Ltd. |
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