CN104316807A - Intelligent transformer joint debugging testing arrangement structure - Google Patents
Intelligent transformer joint debugging testing arrangement structure Download PDFInfo
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- CN104316807A CN104316807A CN201410647170.9A CN201410647170A CN104316807A CN 104316807 A CN104316807 A CN 104316807A CN 201410647170 A CN201410647170 A CN 201410647170A CN 104316807 A CN104316807 A CN 104316807A
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Abstract
The invention relates to the technical field of intelligent transformer joint debugging testing, in particular to an arrangement structure of an intelligent secondary assembly during transformer joint debugging testing. An optical fiber interface on a transformer body is connected with an optical matching connector through optical fibers. An iron core ground copper bar is connected with an iron core ground current device. The power source wire inlet ends of the optical fiber matching connector, an on-load tap-changer, a terminal box and the iron core ground current device are each connected with a surge protective device which is used for preventing lightning impulse tests from damaging a power supply module. All devices need to be grounded are concentrated at a public ground point to be grounded, and equipment damage caused by discharging between ground points is avoided. The invention further discloses a special power supply network structure. Electromagnetic interference signals possibly entering a power supply cable in an induction mode are filtered away further, and therefore safe and reliable power supply of all intelligent assemblies is ensured.
Description
Technical field
The present invention relates to intelligent transformer united test technical field, particularly relate to the arrangement of intelligent two sub-assemblies when transformer united test.
Background technology
The extensive pilot of New Generation of Intelligent transformer station key equipment and gordian technique is also progressively promoted and is proposed more and more higher requirement to the intelligent level of power transformer, in the recent period with the intelligent electric power transformer of integrated state detection sensor and intelligent assembly for Major Developmental Objectives.Domestic main transformer secondary equipment manufacturer, for the intelligent electric power transformer technology conditional request of the up-to-date announcement of State Grid Corporation of China, product technology has been carried out to main two sub-assemblies of transformer, the upgrading of performance and electromagnetic protection, and combine domestic main electric power transformer production producer, carry out the overall united test research of transformer body and intelligent two sub-assemblies, explore transformer body routine test, during type approval test, under intelligence two sub-assembly on-line operation conditions, above-mentioned test even destroys the interference that secondary assembly operating produces, particularly lightning impulse test, temperature rise test and local discharge test.
During traditional transformer test, part two sub-assembly is installed but not charging operation, as top layer oil surface temperature sensor, winding temperature sensor, part two sub-assembly uneasiness dress, as monitoring device, fan controller etc. are put in iron core grounding current pick-up unit, fiber temperature detection device, oil chromatogram analysis device, office.In intelligent transformer detection experiment, said apparatus needs to install and on-line operation, carries out testing inspection together with transformer body.The parameter that above-mentioned two sub-assemblies obtain passes to field monitoring parametric controller with information flow form, and information flow mainly comprises 4-20mA signal, 485 signals, light signal etc.During transformer test, can two sub-assemblies of on-line operation bear the test of the test conditions such as high voltage, big current, high temperature and normally run, and becomes the problem paid close attention to the most in intelligent transformer test.
Summary of the invention
The problem to be solved in the present invention is in the intelligent transformer detection experiment of 110kV, 220kV, 330kV and 500kV, the supply line of two sub-assemblies is made rational planning for, reasonable Arrangement is carried out to signal line, and electromagnetic protection is strengthened to two sub-assemblies, effectively to eliminate or to weaken high voltage, big current etc. when transformer body is tested and, to the interference of two sub-assemblies even destruction, to ensure that two sub-assemblies reliably normally run.
Intelligent transformer bulk testing is based upon in overall uniting and adjustment state.So-called overall uniting and adjustment state, transformer body, sensor, intelligent assembly press actual motion combinations of states together, intelligent assembly and station level simulation system link together, and transformer body controlled group (portion) part, sensor, intelligent assembly, network communication equipment and station level simulation system are all in normal operating conditions.
The overall united test Contents and request relating to main intelligent assembly is as follows:
1, partial discharge test: during partial discharge test, partial discharge monitoring IED at least gathers one group of data, and technical indicator meets fire protection technology requirement, and normal with upper end monitor supervision platform system information flows;
2, lightning impulse test: during lightning impulse test, monitors the duty of each IED, requires not occur to crash and component wear, does not miss (leakage) and receives, misses (leakage) photos and sending messages;
3, load ratio bridging switch test: the collection of load ratio bridging switch controls IED gear information, steering order issue function normally, the technical indicator of monitoring parameter meets fire protection technology requirement, normal with host computer, load ratio bridging switch information flow;
4, cooling device test: cooling device control IED can normal acquisition fan and Oil pump electrical machinery electric current, voltage, and detect its intelligent control function, and technical indicator meets fire protection technology requirement, and information flow is normal;
5, temperature rise test: winding temperature monitoring IED (if any), measure IED normal acquisition temperature data, technical indicator meets fire protection technology requirement, and information flow is normal.
During united test, each control IED should be able to receive all steering orders that station level simulation system sends, and successfully controls actuating or the operation, correctly Feedback control of controlled group (portion) part.
For completing above-mentioned test, the site layout project of intelligent transformer and secondary intelligent assembly needs to follow following several principles: retain enough device placements, the space of operating personnel's patching operations; The distance of distance test (DT) hall earth point is short as far as possible, and single-point grounding, ground wire contact is good; All intelligent assemblies are placed in be had in the cabinet of electromagnetic protection function; Each signal wire and connecting line are arranged neat, and isolation is good, non-interference.According to mentioned above principle, the concrete scheme that the present invention adopts is: a kind of intelligent transformer united test arrangement, comprise transformer body and connected each intelligent assembly, transformer body is provided with terminal box, load ratio bridging switch, iron core grounding copper bar, fan group, two fuel outlet valves and optical fiber interface, optical fiber interface has mating fiber connector by Fiber connection, iron core grounding copper bar is connected with iron core grounding current device, mating fiber connector, load ratio bridging switch, terminal box and iron core grounding current device are by AC220V Power supply, mating fiber connector, load ratio bridging switch, terminal box is all connected a Surge Protector with the power inleting terminal of iron core grounding current device, need the ground wire of grounding intelligent assembly and iron core grounding copper bar ground wire to link together, concentrate on a common ground point ground connection, described fan group is by AC380V Power supply, and this power supply draws from experiment hall AC380V isolating transformer and connects, its neutral line independent grounding, intelligent assembly is also by AC220V power supply and DC220V Power supply, and AC220V power supply draws from any two-phase voltage between phases of experiment hall AC380V isolating transformer and connects, and is first connected in series AC220V isolating transformer and powers to intelligent assembly after connecing Surge Protector, DC220V power supply draws from fairing and connects, and fairing leading-out terminal also connects Surge Protector.
When transformer carries out lightning impulse test, high pressure lightning wave produces strong electromagnetic induction interference to supply line, and current potential lifting value, close to 1kV, causes power protection trip or directly burn out supply module.Therefore, the present invention all connects Surge Protector at power inleting terminal, prevents broken by lightning supply module.
, when there is multiple earth point, because the Potential distribution between different earth point there are differences, between different earth point, there is unpredictalbe electric discharge, time serious, device damage, cisco unity malfunction can be caused in the discovery when carrying out united test.Therefore, all earthing device that needs are concentrated on one point earth by the present invention, the device damage that the electric discharge between preventing because of earth point causes.
The present invention directly draws from experiment hall and connects power supply, because " hold " of experiment hall is shared, when carrying out the high pressure pilot project such as lightning impulse, operation wave impact, high-voltage signal directly leaks into the earth (" hold ") by ground wire, cause the earth potential of low-voltage supply line to be seriously lifted, time serious, can supply module be damaged.Therefore, the present invention designs special supply network structure, and namely AC380V power supply is directly got from experiment hall isolating transformer, its neutral earthing; AC220V power supply gets the arbitrary voltage between phases of AC380V power supply, first connects 220V isolating transformer, and the device of exporting to of isolating transformer is powered; DC220V power supply is provided by fairing, and all and connect surge protective device, the highest transient overvoltage level that electric pressure can be born according to each secondary device is selected for AC220V power supply and DC220V power supply.Further filtering may respond to from power cable the electromagnetic interference signal sealed in, and ensures the power supply safety, reliable of all intelligent assemblies with this.
If earth point is long from the distance of device, because ground wire itself exists certain impedance, can cause there is certain potential difference (PD) between earth point and device ground wire tie point, potential difference (PD) is crossed conference and is caused device damage, cisco unity malfunction.Therefore, common ground point of the present invention and each distance of earthing device that needs are less than or equal to 3m.
Further, the present invention also comprises a test operation room, and the distance of described transformer and each intelligent assembly distance test (DT) operation room is greater than 3m, is less than 20m, keeps certain safety net distance, ensures that operating personnel have the sufficient operating space such as wiring, debugging.But during due to test, around transformer, the data of each monitoring device need the monitoring backstage being passed to test operation room, and communications line belongs to open-wire line connection, during lightning impulse test, high pressure lightning wave produces certain electromagnetic induction interference to communication line, communication line is long, and exposed aerial circuit is longer, and the electromagnetic interference (EMI) of generation is more serious.Therefore, distance is unsuitable excessive.
Further, each intelligent assembly used by transformer united test comprises oil temperature oil level oil pressure and measures IED, iron core grounding current measures IED, load ratio bridging switch control IED, cooling device control IED, bushing monitoring IED, partial discharge monitoring IED, winding temperature monitoring IED, oil dissolved gas monitoring IED and main IED, each intelligent assembly is arranged in Intelligent component cabinet, wherein, load ratio bridging switch control IED is connected with load ratio bridging switch by BDC coded signal line, oil dissolved gas monitoring IED is connected with the second fuel outlet valve by oil guide pipe, partial discharge monitoring IED is connected with the exploration type PD meter in the first fuel outlet valve by 4-20mA signal wire, iron core grounding current is measured IED and is connected with iron core grounding current device by 4-20mA signal wire, oil temperature oil level oil pressure is measured IED and is connected with terminal box by 4-20mA signal wire, winding temperature monitoring IED is connected with mating fiber connector by RS-485 signal wire, cooling device control IED is connected with transformer Cooling controller by relay control signal line, IED is by 4-20mA signal wire and casing monitoring sensor in bushing monitoring, voltage transformer (VT) connects.
Further, present invention employs the anti-interference method of shielding and ground connection cooperation.Namely described 4-20mA signal wire, RS-485 signal wire and BDC coded signal line all adopt double shield line, and earthing mode is outer shielding two-terminal-grounding, and internal layer shielding single-end earthed.
Preferably, described fairing is rectification feed panel.
Beneficial effect of the present invention:
(1) the present invention is directed to the site test of intelligent transformer intelligent assembly uniting and adjustment; according to the problem that 110kV, 220kV, 330kV and 500kV intelligent transformer detection experiment actual participation process runs into; make the space arrangement of a set of intelligent assembly at experiment hall, the most basic protective effect can be played to equipment and experimenter according to insulation and protection distance.
(2), during lightning impulse test, ensure that low-voltage intelligent secondary device normally works by the design of power supply plan and protectiving scheme, do not occur to crash or component wear, information transmission is not leaked biography, is not misinformated.
(3) formulated the power supply plan of experiment hall and intelligent assembly equipment, effectively can eliminate the impact of floating potential on isolating transformer, guarantee Electrical Safety, the higher hamonic wave signal that the lightning impulse of filtering simultaneously produces.
(4) anti-interference method of shielding and ground connection cooperation is proposed.Using the unique selection of shield type cable as transformer secondary equipment supply lines and signal wire, by shielding layer grounding, external undesired signal is imported the earth.
Accompanying drawing explanation
Fig. 1 is intelligent transformer united test space of the present invention arrangenent diagram;
Fig. 2 is intelligent transformer of the present invention intelligent assembly Organization Chart used;
Fig. 3 is intelligent transformer of the present invention test supply network structural drawing;
In figure, 1, transformer body, 2, exploration type PD meter; 3, the first fuel outlet valve; 4, load ratio bridging switch, 5, iron core grounding current device, 6, iron core grounding copper bar; 7, fan group; 8, optical fiber, 9, optical fiber interface, 10, terminal box; 11, the second fuel outlet valve; 12, oil guide pipe, 13, mating fiber connector, 14, Surge Protector; 15, test operation room; 16, experiment hall AC380V isolating transformer, 17, AC220V isolating transformer, 18, rectification feed panel; 19, Intelligent component cabinet, 20, air-cooled control cabinet.
Embodiment
Below in conjunction with drawings and Examples, implementation process of the present invention is elaborated.
It is intelligent transformer united test space arrangenent diagram shown in Fig. 1.Comprise transformer body 1 and test operation room 15, transformer body 1 is provided with terminal box 10, load ratio bridging switch 4, iron core grounding copper bar 6, fan group 7, two fuel outlet valves 3, 11 and optical fiber interface 9, optical fiber interface 9 is connected with mating fiber connector 13 by optical fiber 8, iron core grounding copper bar 6 is connected with iron core grounding current device 5, mating fiber connector 13, load ratio bridging switch 4, terminal box 10 and iron core grounding current device 5 are by AC220V Power supply, mating fiber connector 13, load ratio bridging switch 4, terminal box 10 is all connected a Surge Protector 14 with the power inleting terminal of iron core grounding current device 5.The overvoltage level that the level of protection of Surge Protector can be born according to each power supply unit is determined, is generally no more than AC240V for AC220V voltage magnitude.
Intelligent transformer assembly by measuring, control, the IED such as monitoring gathers and forms, and is a kind of transformer device bearing the intelligent Core Feature of transformer body, connects into an organic whole by cable or optical fiber and transformer body.It is the Organization Chart of each intelligent assembly used by transformer united test shown in Fig. 2, comprise oil temperature oil level oil pressure and measure IED, iron core grounding current measures IED, load ratio bridging switch control IED, cooling device control IED, bushing monitoring IED, partial discharge monitoring IED, winding temperature monitoring IED, the main IED on oil dissolved gas monitoring IED and upper strata, each intelligent assembly is arranged in Intelligent component cabinet 19, as shown in Figure 1, load ratio bridging switch control IED is connected with load ratio bridging switch 4 by BDC coded signal line, oil dissolved gas monitoring IED is connected with the second fuel outlet valve 11 by oil guide pipe 12, partial discharge monitoring IED is connected with the exploration type PD meter 2 in the first fuel outlet valve 3 by 4-20mA signal wire, iron core grounding current is measured IED and is connected with iron core grounding current device 5 by 4-20mA signal wire, oil temperature oil level oil pressure is measured IED and is connected with terminal box 10 by 4-20mA signal wire, winding temperature monitoring IED is connected with mating fiber connector 13 by RS-485 signal wire, cooling device control IED is connected with transformer Cooling controller by relay control signal line, cooling controller is arranged in air-cooled control cabinet 20, be used for controlling the work of fan group, bushing monitoring IED is by 4-20mA signal wire and the casing monitoring sensor be positioned on transformer, voltage transformer (VT) connects.Described 4-20mA signal wire, RS-485 signal wire and BDC coded signal line all adopt double shield line, and earthing mode is outer shielding two-terminal-grounding, and internal layer shielding single-end earthed.
All ground wires of the device of ground connection (comprise and need grounding intelligent assembly and transformer core) that needs link together, and concentrate on a common ground point ground connection, and this earth point and each distance of earthing device that needs are less than or equal to 3m.The distance of all device separating test operation rooms 15 is at more than 3m, but unsuitable excessive, controls at below 20m.
It is intelligent transformer united test supply network structural drawing shown in Fig. 3.Transformer fan group 7 is by AC380V Power supply, and this power supply draws from experiment hall AC380V isolating transformer 16 and connects, its neutral line independent grounding.During intelligent transformer united test, the operating voltage of all intelligent assemblies is AC380V or AC220V or DC220V.AC220V power supply draws from any two-phase voltage between phases of experiment hall AC380V isolating transformer 16 and connects, and is first connected in series AC220V isolating transformer 17 and powers to intelligent assembly after connecing Surge Protector; DC220V power supply draws from rectification feed panel 18 and connects, and rectification feed panel 18 leading-out terminal also connects Surge Protector.In actual tests; the AC380V isolating transformer outgoing side neutral line is unearthed, does not add AC220V isolating transformer, before not adding Surge Protector; multiple self not charged protection device when lightning impulse test, power module is broken or automatic cut-off protection.According to power supply plan of the present invention, ensure that the security of on-the-spot electricity consumption, effectively prevent the impact of lightning impulse test on intelligent assembly power supply safety simultaneously.
Claims (6)
1. an intelligent transformer united test arrangement, comprise transformer body (1) and connected each intelligent assembly, transformer body is provided with terminal box (10), load ratio bridging switch (4), iron core grounding copper bar (6), fan group (7), two fuel outlet valves (3 and 11) and optical fiber interface, optical fiber interface (9) is connected with mating fiber connector (13) by optical fiber (8), iron core grounding copper bar (6) is connected with iron core grounding current device (5), mating fiber connector (13), load ratio bridging switch (4), terminal box (10) and iron core grounding current device (5) are by AC220V Power supply, it is characterized in that: mating fiber connector (13), load ratio bridging switch (4), terminal box (10) is all connected a Surge Protector (14) with the power inleting terminal of iron core grounding current device (5), need the ground wire of grounding intelligent assembly and iron core grounding copper bar ground wire to link together, concentrate on a common ground point ground connection, described fan group (7) is by AC380V Power supply, and this power supply draws from experiment hall AC380V isolating transformer (16) and connects, its neutral line independent grounding, intelligent assembly is also by AC220V power supply and DC220V Power supply, AC220V power supply from experiment hall AC380V isolating transformer (16) arbitrarily two-phase voltage between phases draw and connect, be first connected in series AC220V isolating transformer (17) and power to intelligent assembly after connecing Surge Protector, DC220V power supply draws from fairing and connects, and fairing leading-out terminal also connects Surge Protector.
2. intelligent transformer united test arrangement according to claim 1, is characterized in that: described common ground point and each distance of earthing device that needs are less than or equal to 3m.
3. intelligent transformer united test arrangement according to claim 1, is characterized in that: also comprise a test operation room (15), and the distance of described transformer and each intelligent assembly distance test (DT) operation room is greater than 3m, is less than 20m.
4. the intelligent transformer united test arrangement according to claim 1 or 2 or 3, it is characterized in that: each intelligent assembly comprises oil temperature oil level oil pressure and measures IED, iron core grounding current measures IED, load ratio bridging switch control IED, cooling device control IED, bushing monitoring IED, partial discharge monitoring IED, winding temperature monitoring IED, oil dissolved gas monitoring IED and main IED, each intelligent assembly is arranged in Intelligent component cabinet (19), wherein, load ratio bridging switch control IED is connected with load ratio bridging switch (4) by BDC coded signal line, oil dissolved gas monitoring IED is connected with the second fuel outlet valve (11) by oil guide pipe (12), partial discharge monitoring IED is connected with the exploration type PD meter (2) in the first fuel outlet valve (3) by 4-20mA signal wire, iron core grounding current is measured IED and is connected with iron core grounding current device (5) by 4-20mA signal wire, oil temperature oil level oil pressure is measured IED and is connected with terminal box (10) by 4-20mA signal wire, winding temperature monitoring IED is connected with mating fiber connector (13) by RS-485 signal wire, cooling device control IED is connected with transformer Cooling controller by relay control signal line, IED is by 4-20mA signal wire and casing monitoring sensor in bushing monitoring, voltage transformer (VT) connects.
5. intelligent transformer united test arrangement according to claim 4, it is characterized in that: described 4-20mA signal wire, RS-485 signal wire and BDC coded signal line all adopt double shield line, earthing mode is outer shielding two-terminal-grounding, and internal layer shielding single-end earthed.
6. intelligent transformer united test arrangement according to claim 1, is characterized in that: described fairing is rectification feed panel (18).
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| CN201410647170.9A CN104316807A (en) | 2014-11-14 | 2014-11-14 | Intelligent transformer joint debugging testing arrangement structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112910101A (en) * | 2021-05-10 | 2021-06-04 | 国网江西省电力有限公司电力科学研究院 | Integrated monitoring system for power distribution transformer station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112910101A (en) * | 2021-05-10 | 2021-06-04 | 国网江西省电力有限公司电力科学研究院 | Integrated monitoring system for power distribution transformer station |
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