CN203734299U - Relay protection system - Google Patents
Relay protection system Download PDFInfo
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- CN203734299U CN203734299U CN201420122903.2U CN201420122903U CN203734299U CN 203734299 U CN203734299 U CN 203734299U CN 201420122903 U CN201420122903 U CN 201420122903U CN 203734299 U CN203734299 U CN 203734299U
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- 230000001012 protector Effects 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model relates to a relay protection system which is arranged in a secondary circuit of secondary equipment to be overhauled or replaced and is connected with a switching mechanism connected with the second equipment to be overhauled or replaced. The system provided by the utility model contains a relay protector, an output port connected with the relay protector and a changeover mechanism of a backboard of the secondary equipment to be overhauled or replaced. Three-phase current of a secondary circuit is connected with a current input port of the relay protector through three clip-type current clamps so as to form a current circuit. Three-phase voltage of the secondary circuit is connected with a voltage input port of the relay protector through an air switch so as to form a voltage circuit. An operating circuit of the relay protector is connected with an anti-tripping circuit and an analog breaker circuit. An external power supply is connected with a power input port of the relay protector so as to form a power circuit. According to the utility model, the secondary equipment is replaced without power outages, and temporary protection is provided for the equipment. Thus, power outage time of a line is shortened, and power supply reliability is guaranteed.
Description
Technical field
The utility model relates to a kind of in the time that secondary device is overhauled or changed, and can solve the relaying protection system of the unsafe conditions that uninterrupted operation brings.
Background technology
The reliability of power supply is an important indicator of operation of power networks; acid test to overhauling specialty; especially concerning secondary maintenance specialty; the development of computer technology has promoted microcomputer protecting device and has concentrated large-scale application in electric power system; but because the life-span of electronic devices and components is affected by various conditions, very easily break down, therefore must regularly carry out the interruption maintenance of device; change rapid wear plug-in unit, the power supply reliability of this and electrical network is big contradiction.And along with the reinforcement of electrical network primary system, the raising of breaker reliability, the extensive use of unattended substation; present newly-built transformer station seldom adopts hospital bus bar and the by-pass switch mode of connection of original old-fashioned transformer station; but main logical " main transformer-switch cabinet bus-switch-circuit-user " this mode supplying power for outside; when transformer station's outlet switch or protective device go wrong, circuit must be accompanied and be stopped.Along with electrical network popularization, secondary device quantity is also more and more, and equipment failure rate also improves relatively, has greatly affected power supply reliability.Therefore, need to provide a kind of protective relaying device of safeguards system reliability can equipment be overhauled or be changed in the situation that not have a power failure time.
Summary of the invention
The purpose of this utility model is to provide a kind of when equipment being overhauled or changed in the situation that not having a power failure; for equipment provides temporary protection; thereby reduce the external interruption duration of circuit, or reduce the risk occurring while externally power failure, ensure the relaying protection system of power supply reliability.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of relaying protection system, the switching mechanism being arranged on the secondary circuit of secondary device of Awaiting Overhaul or replacing and be connected with the secondary device of described Awaiting Overhaul or replacing is connected, and it comprises relay protector, connect the changeover mechanism of the backboard of the output port of described relay protector and the secondary device of described Awaiting Overhaul or replacing;
The three-phase current of described secondary circuit presss from both sides and is connected with the current input terminal mouth of described relay protector and forms current circuit through three pincers type electric currents, and described current circuit changes terminal electric current and the jack electric current of three-phase into for the three-phase current that the secondary circuit by described is obtained;
The three-phase voltage of described secondary circuit is connected with the voltage input end mouth of described relay protector through air switch and forms voltage circuit, and described voltage circuit changes terminal voltage and the jack voltage of three-phase into for the three-phase voltage that the secondary circuit by described is obtained;
The operation circuit of described relay protector is connected with anti-jump loop and mimic-disconnecting switch loop; Described anti-jump loop comprises and is connected with described switching mechanism and throws the anti-trip relay moving back by described operation circuit control, and described mimic-disconnecting switch loop comprises the mimic-disconnecting switch plug-in unit of the divide-shut brake that can simulate described switching mechanism and controls described mimic-disconnecting switch plug-in unit and throw the diverter switch of moving back;
External power supply is connected with the power input mouth of described relay protector and forms electric power loop, and described electric power loop is for changing described external power supply into for the installation's power source of himself with for the operating power of described operation circuit.
Described changeover mechanism comprises having some keysets to corresponding connecting interface; an interface in connecting interface described in every pair is connected with the output port of described relay protector by transit cable, and another connecting interface is connected with the backboard of the secondary device of described Awaiting Overhaul or replacing.
Described external power supply is AC power or DC power supply, and in the time adopting described AC power, described AC power is connected to the power input mouth of described relay protector through rectifying device.
Described rectifying device is silicon rectifier device.
The output port of described relay protector is connected with warning device.
Described operating power is connected to described operation circuit through operating power air switch.
Described relay protector, described anti-jump loop, described mimic-disconnecting switch loop are integrated in a portable casing; described portable casing has a panel, and power input mouth, the diverter switch of the output port of the voltage input end mouth of the current input terminal mouth of described relay protector, described relay protector, described relay protector, described relay protector is arranged on described panel.
Because technique scheme is used; the utility model compared with prior art has following advantages: when the utility model can overhaul or change secondary device in the situation that not having a power failure; substitute secondary device; for equipment provides temporary protection; thereby reduce the external interruption duration of circuit; or reduce the risk occurring while externally power failure, even can in the time not allowing to have a power failure for a long time again without equipment and spare part, drop into interim operation, thereby ensured the reliability of power supply.
Brief description of the drawings
The principle schematic of the current circuit that accompanying drawing 1 is relaying protection system of the present utility model.
The principle schematic of the voltage circuit that accompanying drawing 2 is relaying protection system of the present utility model.
The principle schematic of the electric power loop that accompanying drawing 3 is relaying protection system of the present utility model.
The principle schematic of the operation circuit that accompanying drawing 4 is relaying protection system of the present utility model.
The principle schematic of the alarm circuit that accompanying drawing 5 is relaying protection system of the present utility model.
The panel schematic diagram that accompanying drawing 6 is relaying protection system of the present utility model.
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment mono-: a kind of relaying protection system, is arranged on the secondary circuit of secondary device (protective device) of Awaiting Overhaul or replacing and the switching mechanism being connected with the secondary device of Awaiting Overhaul or replacing is connected.
This protective relaying device comprises relay protector, connects the changeover mechanism of the backboard of the output port of relay protector and the secondary device of Awaiting Overhaul or replacing.At the present embodiment, relay protector is selected PSL641 type relay protector.
Shown in accompanying drawing 1, the three-phase current of secondary circuit is connected and forms current circuit with the current input terminal mouth of relay protector through three pincers type electric current folders.Current circuit is for changing the three-phase current being obtained by secondary circuit in terminal electric current and the jack electric current of three-phase.Be specially, the secondary side access relay protector of pincers type electric current folder (effect is equivalent to the little CT of secondary), had so both obtained protective current quickly and easily, avoided out again CT in flakes, caused the danger of electric current secondary loop open circuit while again connecing electric current line.Certainly for ensureing safety, bis-earth connections of former CT must not be removed.General 35KV and following route protection, its current quick-breaking definite value is tens amperes, actual secondary current can not exceed 100 amperes, and the magnetic circuit of this pincers type electric current folder must have air gap, therefore can not produce saturated.Observe electric current according to conventional pincers type ammeter, its linearity is goodish, through test of many times, also proves the reliability of little CT progress of disease electric current.Therefore, the secondary current value of pincers type electric current folder can correctly reflect two sub-values of protecting CT completely by a certain percentage, has ensured the accuracy of sampling.The no-load voltage ratio of this pincers type electric current folder is 5:1.Employing three-phase electricity flows to, the mode that three-phase electricity flows out, both convenient serial connection miscellaneous equipment; facilitate again loop check; can simply measure every phase current impedance loop guarantee electric current with universal instrument and not open a way, in the time introducing electric current, in direct reading device, protect sample rate current value simultaneously, ensure that sampling normally.
Shown in accompanying drawing 2, the three-phase voltage of secondary circuit is connected with the voltage input end mouth of relay protector through air switch and forms voltage circuit, and voltage circuit is for changing the three-phase voltage being obtained by secondary circuit into terminal voltage and the jack voltage of three-phase.Directly introduce three-phase voltage, ensure, after not short circuit of voltage, to send air switch.Common protection for feed line does not need to connect alternating voltage.
Shown in accompanying drawing 3, external power supply is connected with the power input mouth of relay protector and forms electric power loop, and electric power loop is for changing external power supply into for the installation's power source of himself with for the operating power of operation circuit.External power supply is 220V AC power or DC power supply, and AC power can be got electrical source of power or other power supply, from AC outlet or shield cashier's office in a shop direct current sky and drive pile crown and access.In the time adopting AC power, AC power is connected to the power input mouth of relay protector through silicon rectifier device.
Shown in accompanying drawing 4, the operation circuit of relay protector is connected with anti-jump loop and mimic-disconnecting switch loop, and operating power is connected to operation circuit through operating power air switch.Operation circuit can regularly be tested patchcord, ensures that connection reliability and insulation are good.
Anti-jump loop comprises and is connected with switching mechanism and throws the anti-trip relay moving back by operation circuit control.Under normal circumstances; for preventing that secondary circuit failure or other reason from causing switch to jump, protective device or switching mechanism are furnished with anti-trip relay and prevent that switch from jumping, due to historical reasons; different substation adopts respectively protection anti-jump or switch itself is anti-jump, and both can not use simultaneously.This operation circuit of this relaying protection system inside is provided with anti-trip relay, can decide divide-shut brake electric current according to field condition, can also directly exit this device through panel wire jumper anti-jump, can not cause function conflict.
Mimic-disconnecting switch loop comprises that mimic-disconnecting switch plug-in unit and the control simulation circuit breaker plug-in unit of divide-shut brake that can analog switch mechanism throw the diverter switch of moving back.Mimic-disconnecting switch loop both can be used in conjunction with this protection system, also can be by the diverter switch disconnecting independent as mimic-disconnecting switch for protector revise at ordinary times.Before formally putting into operation, must access mimic-disconnecting switch loop, checking various functions is normal.
Changeover mechanism comprises having some keysets to corresponding connecting interface; an interface in every pair of connecting interface is connected with the output port of relay protector by transit cable, and another connecting interface is connected with the lamina dorsalis plug of the secondary device of Awaiting Overhaul or replacing.
The output port of relay protector is also connected with warning device, and as shown in Figure 5, it can drive warning device to send sound and light alarm signal when multiple situation (as abnormal in device dead electricity, protection action, protective device).In particular cases, change special joint and can realize distant place alarm.
Relay protector, anti-jump loop, mimic-disconnecting switch loop are integrated in a portable casing; portable casing has a panel; the current input terminal mouth of relay protector, the voltage input end mouth of relay protector, the output port of relay protector, the power input mouth of relay protector, diverter switch are arranged on panel, as shown in Figure 6.
This relaying protection system can substitute operating secondary device (protective relaying device), simple to operate, reliable.Can realize simple relay protection function; Can adapt to the anti-bouncing function of various switches; Facilitating setting current size and function to throw moves back; Have switch hand and divide, hand closes function; Can move back protecting hard pressing plate to throw; There is protection alarm, protection action remote signaling function, insulation property are good.
Native system can be applied to the maintenance of single protective device; as the replacing of all protective plug-in units in device, fixed value adjusting, edition upgrading etc. function; processing all can not have a power failure; having greatly reduced due to the impact of protective relaying device fault on user, is apparent in current " consumer uppermost " lower its economic benefit and social benefit.Especially for 35KV, 10KV distribution line directly to customer power supply, protective device service without power-off has more practical significance.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.
Claims (7)
1. a relaying protection system, the switching mechanism being arranged on the secondary circuit of secondary device of Awaiting Overhaul or replacing and be connected with the secondary device of described Awaiting Overhaul or replacing is connected, and it is characterized in that: it comprises relay protector, connect the changeover mechanism of the backboard of the output port of described relay protector and the secondary device of described Awaiting Overhaul or replacing;
The three-phase current of described secondary circuit presss from both sides and is connected with the current input terminal mouth of described relay protector and forms current circuit through three pincers type electric currents, and described current circuit changes terminal electric current and the jack electric current of three-phase into for the three-phase current that the secondary circuit by described is obtained;
The three-phase voltage of described secondary circuit is connected with the voltage input end mouth of described relay protector through air switch and forms voltage circuit, and described voltage circuit changes terminal voltage and the jack voltage of three-phase into for the three-phase voltage that the secondary circuit by described is obtained;
The operation circuit of described relay protector is connected with anti-jump loop and mimic-disconnecting switch loop; Described anti-jump loop comprises and is connected with described switching mechanism and throws the anti-trip relay moving back by described operation circuit control, and described mimic-disconnecting switch loop comprises the mimic-disconnecting switch plug-in unit of the divide-shut brake that can simulate described switching mechanism and controls described mimic-disconnecting switch plug-in unit and throw the diverter switch of moving back;
External power supply is connected with the power input mouth of described relay protector and forms electric power loop, and described electric power loop is for changing described external power supply into for the installation's power source of himself with for the operating power of described operation circuit.
2. relaying protection system according to claim 1; it is characterized in that: described changeover mechanism comprises having some keysets to corresponding connecting interface; an interface in connecting interface described in every pair is connected with the output port of described relay protector by transit cable, and another connecting interface is connected with the backboard of the secondary device of described Awaiting Overhaul or replacing.
3. relaying protection system according to claim 1; it is characterized in that: described external power supply is AC power or DC power supply; in the time adopting described AC power, described AC power is connected to the power input mouth of described relay protector through rectifying device.
4. relaying protection system according to claim 3, is characterized in that: described rectifying device is silicon rectifier device.
5. relaying protection system according to claim 1, is characterized in that: the output port of described relay protector is connected with warning device.
6. relaying protection system according to claim 1, is characterized in that: described operating power is connected to described operation circuit through operating power air switch.
7. relaying protection system according to claim 1; it is characterized in that: described relay protector, described anti-jump loop, described mimic-disconnecting switch loop are integrated in a portable casing; described portable casing has a panel, and power input mouth, the diverter switch of the output port of the voltage input end mouth of the current input terminal mouth of described relay protector, described relay protector, described relay protector, described relay protector is arranged on described panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420122903.2U CN203734299U (en) | 2014-03-19 | 2014-03-19 | Relay protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420122903.2U CN203734299U (en) | 2014-03-19 | 2014-03-19 | Relay protection system |
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| Publication Number | Publication Date |
|---|---|
| CN203734299U true CN203734299U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420122903.2U Expired - Lifetime CN203734299U (en) | 2014-03-19 | 2014-03-19 | Relay protection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825259A (en) * | 2014-03-19 | 2014-05-28 | 江苏沙洲电气有限公司 | Relay protection system |
| CN107168225A (en) * | 2017-05-22 | 2017-09-15 | 南京南瑞继保电气有限公司 | A kind of different model protects the AC sampling switching method of measuring and controlling equipment |
| CN110932227A (en) * | 2019-12-11 | 2020-03-27 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Method for replacing protection device without power outage |
-
2014
- 2014-03-19 CN CN201420122903.2U patent/CN203734299U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825259A (en) * | 2014-03-19 | 2014-05-28 | 江苏沙洲电气有限公司 | Relay protection system |
| CN103825259B (en) * | 2014-03-19 | 2017-09-08 | 江苏沙洲电气有限公司 | Relay protection system |
| CN107168225A (en) * | 2017-05-22 | 2017-09-15 | 南京南瑞继保电气有限公司 | A kind of different model protects the AC sampling switching method of measuring and controlling equipment |
| CN110932227A (en) * | 2019-12-11 | 2020-03-27 | 国网河北省电力有限公司邯郸市肥乡区供电分公司 | Method for replacing protection device without power outage |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |