CN109324306B - GIS equipment current transformer error testing system and construction method thereof - Google Patents
GIS equipment current transformer error testing system and construction method thereof Download PDFInfo
- Publication number
- CN109324306B CN109324306B CN201811532003.4A CN201811532003A CN109324306B CN 109324306 B CN109324306 B CN 109324306B CN 201811532003 A CN201811532003 A CN 201811532003A CN 109324306 B CN109324306 B CN 109324306B
- Authority
- CN
- China
- Prior art keywords
- current transformer
- current
- bus
- transformer
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 68
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
The invention discloses a field error test system of a GIS equipment current transformer, which comprises a current booster, a standard current transformer, a tested Current Transformer (CT) and error test equipment, wherein two ends of a primary lead of a primary large current output loop of the current booster are respectively connected to grounding metal sheets at one sides of grounding switches (ES1 and ES2) close to the grounding end, the grounding switches (ES1 and ES2) are in a closed state, so that the tested Current Transformer (CT) is connected in series to the primary large current output loop of the current booster, and the error test equipment is respectively connected to secondary output ends of the standard current transformer and the tested Current Transformer (CT). The system construction method greatly improves the field error checking work efficiency of the current transformer in the GIS, obviously reduces the labor intensity, and reduces the capacity of a test power supply and the transportation pressure of test equipment under the test condition of meeting the regulation requirement.
Description
Technical Field
The invention belongs to the technical field of power generation and power supply, and particularly relates to a field error testing system of a GIS equipment current transformer and a construction method thereof.
Background
With the construction of power grids in China, gas insulated metal enclosed switchgear (hereinafter referred to as GIS) is widely applied to substations of 110kV and above due to the characteristics of small occupied area, high reliability and the like. The current transformer has the functions of current transformation and electrical isolation, can convert primary current with a larger numerical value into secondary current with a smaller numerical value, and is used for protection, measurement and the like. The field error test of the current transformer is a strong inspection project required by national technical regulations, and the GIS current transformer has the disadvantages of long primary current loop, ground capacitance variation along with the length of a pipeline and the number of switch devices and the like because the GIS current transformer is sealed in an insulating air chamber, so that the current rise and the voltage rise in the transformer error test are difficult, and the GIS current transformer is also a difficult point of the current domestic test in this respect.
The basic principle of field error testing of a current transformer is shown in fig. 1. When the current transformer is subjected to field error test, a continuously adjustable power supply is output to the current booster through the voltage regulator, the current booster realizes a primary large current output loop, primary side coils of the standard current transformer and the tested current transformer are wound on the primary large current output loop of the current booster, error test equipment is used for connecting the standard current transformer and the tested current transformer respectively, secondary output values of the two current transformers are calculated, and the precision of the secondary output value of the tested current transformer compared with the precision of the secondary output value of the standard current transformer is calculated.
The primary structure of the current transformer in the GIS device is shown in fig. 2. In fig. 2, which is a typical double bus structure, a main transformer is connected to the buses I and II through disconnectors DS1, DS2, DS3 and a circuit breaker CB 1. Between the disconnector DS1 and the circuit breaker CB1 is a current transformer CT1 for monitoring the main transformer operating power. ES1, ES2, ES3 of the main incoming branch are earthing switches distributed at different positions. The current transformer CT1 of the main transformer incoming line is the equipment which needs to carry out the field error test. When the field error test is carried out, the traditional method is that a large-current wire for test is connected to the primary wire connecting position of the main transformer high-voltage side magnetic sleeve, then all grounding disconnecting switches are disconnected, the magnetic sleeve and the bus are communicated, the magnetic sleeve is connected to another line magnetic sleeve with an external interface through the bus, and the large-current wire for test is connected through the primary wire interface of the magnetic sleeve of the other line to form a primary large-current loop. The whole primary heavy current loop comprises two sections of primary GIS line branches, one section of bus and heavy current wires for testing, wherein the length of the heavy current wires is the same as that of the two sections of GIS line branches, and the length of the whole primary loop is not less than 20 m.
When the primary loop constructed by the method is used for field test, the large-current wire for test is long, the field test arrangement wastes time and labor, the primary loop is long, the loop impedance is large, the capacities of the required current raising equipment and the test power supply are large, and the field arrangement difficulty is large. In addition, the GIS pipeline primary test current loop is not visual, the bus is not exposed, the primary test current loop is too long and other factors bring great difficulty to the field error test of the current transformer, and the GIS pipeline primary test current loop is also a common problem facing the field error test of the GIS current transformer in China at present.
Disclosure of Invention
The invention provides a field error testing system of a GIS equipment current transformer and a construction method thereof according to a large number of field tests and by combining the characteristics of GIS equipment.
The technical scheme of the field error testing system of the GIS equipment current transformer comprises the following steps:
the utility model provides a GIS equipment current transformer's on-spot error test system, including current rising ware, standard current transformer, by examination current transformer CT and error test equipment, current rising ware realizes a heavy current output return circuit, standard current transformer's a side coil winding is on current rising ware a heavy current output return circuit, by examination current transformer CT in the GIS equipment sets up between main magnetic sleeve and bus, main magnetic sleeve that becomes is connected to the bus through first isolator DS1, by examination current transformer CT's both ends be equipped with earthing switch ES1 respectively, ES2, its characterized in that: two ends of a primary lead of a primary large-current output loop of the current booster are respectively connected to grounding metal sheets on one sides of grounding switches ES1 and ES2 close to the ground end, the grounding switches ES1 and ES2 are in a closed state, so that a tested current transformer CT is connected to the primary large-current output loop of the current booster in series, and error testing equipment is respectively connected to secondary output ends of a standard current transformer and the tested current transformer CT.
Further, a circuit breaker CB1 is arranged between the tested current transformer CT and the bus.
Further, the bus bar includes a first bus bar and a second bus bar.
Further, second and third disconnectors DS2, DS3 are provided between the circuit breaker CB1 and the bus bar, the second disconnector DS2 is connected to the first bus bar, and the third disconnector DS3 is connected to the second bus bar.
Further, the second isolator switch is connected in parallel with the third isolator switch.
Further, a first disconnecting switch DS1, a tested current transformer CT and a circuit breaker CB1 are connected in series to form a main transformer incoming line main circuit.
Further, earthing switches ES1, ES2 form a main transformer incoming line branch.
The technical scheme of the construction method of the field error test system is as follows:
a construction method of a field error test system of a GIS equipment current transformer is characterized by comprising the following steps:
(1) providing a current booster, a standard current transformer, a tested current transformer CT and error testing equipment, wherein the current booster realizes a primary large current output loop, and a primary side coil of the standard current transformer is wound on the primary large current output loop of the current booster;
(2) arranging a tested current transformer CT in GIS equipment between a main transformer magnetic sleeve and a bus, connecting the main transformer magnetic sleeve to the bus through a first isolating switch DS1, and arranging grounding switches ES1 and ES2 at two ends of the tested current transformer CT respectively;
(3) closing grounding switches ES1 and ES2, opening grounding metal sheets at one sides of the grounding switches ES1 and ES2 close to the ground end, and respectively connecting two ends of a primary lead of a primary large-current output loop of the current booster to the opened grounding metal sheets of the grounding switches ES1 and ES2, so that a tested current transformer CT is connected in series to the primary large-current output loop of the current booster;
(4) and respectively connecting the error test equipment to the secondary output ends of the standard current transformer and the tested current transformer CT.
Further, a circuit breaker CB1 is arranged between the tested current transformer CT and the bus, and the circuit breaker CB1 is closed when the field error test system is constructed.
Further, the bus bar includes a first bus bar and a second bus bar.
Further, second and third disconnectors DS2, DS3 are provided between the circuit breaker CB1 and the bus bar, the second disconnector DS2 is connected to the first bus bar, and the third disconnector DS3 is connected to the second bus bar. When the field error test system is constructed, the first, second and third isolating switches DS1, DS2 and DS3 are turned off.
Further, a second isolation switch is connected in parallel with the third isolation switch.
Further, a first disconnecting switch DS1, a tested current transformer CT and a circuit breaker CB1 are connected in series to form a main transformer incoming line main circuit.
Further, earthing switches ES1, ES2 are provided as main transformer incoming branches.
The construction method of the field error test system can solve the technical problem that the lengths of the bus and the primary lead are too long in the traditional error test method, greatly reduces the length of the turned-back primary bus and the distance from the inlet of the magnetic sleeve to the grounding switch, can reduce the length of the primary bus participating in the upwash to be within 5 meters, and greatly reduces the capacity of the upwash equipment. The method greatly improves the field error checking work efficiency of the current transformer in the GIS, obviously reduces the labor intensity, and reduces the capacity of a test power supply and the transportation pressure of test equipment under the test condition of meeting the regulation requirement.
Drawings
FIG. 1 is a basic schematic diagram of a field error test of a current transformer;
FIG. 2 is a schematic diagram of a primary structure of a current transformer in the GIS device;
fig. 3 is a wiring schematic diagram of the field error testing system of the GIS equipment current transformer of the present invention.
Detailed Description
The following detailed description of the embodiments of the invention refers to the accompanying drawings.
The field error test system of the GIS equipment current transformer disclosed by the embodiment of the invention comprises a current booster, a standard current transformer, a tested current transformer CT and error test equipment, wherein the current booster realizes a primary large current output loop, a primary side coil of the standard current transformer is wound on the primary large current output loop of the current booster, and the error test equipment is respectively connected to secondary output ends of the standard current transformer and the tested current transformer CT.
As shown in fig. 3, a tested current transformer CT in the GIS device is disposed between a main transformer magnetic sleeve and a bus, the main transformer magnetic sleeve is connected to the bus through a first isolation switch DS1, two ends of the tested current transformer CT are respectively provided with grounding switches ES1 and ES2, two ends of a primary wire of a primary large current output circuit of the current booster are respectively connected to grounding metal sheets on one sides of the grounding switches ES1 and ES2 close to the ground, and the grounding switches ES1 and ES2 are in a closed state, so that the tested current transformer CT is connected in series to the primary large current output circuit of the current booster.
A circuit breaker CB1 is arranged between the tested current transformer CT and the bus. The bus bar includes a first bus bar and a second bus bar. Second and third disconnecting switches DS2, DS3 are arranged between the circuit breaker CB1 and the bus, the second disconnecting switch DS2 is connected to the first bus, and the third disconnecting switch DS3 is connected to the second bus. The second isolating switch is connected in parallel with the third isolating switch. The first disconnecting switch DS1, the tested current transformer CT and the circuit breaker CB1 are connected in series to form a main transformer incoming line main circuit. Earthing switches ES1, ES2 form a main transformer incoming line branch.
The method for constructing the field error test system of the GIS equipment current transformer in the embodiment of the invention is described below with reference to FIG. 1 and FIG. 3, and comprises the following steps:
(1) providing a current booster, a standard current transformer, a tested current transformer CT and error testing equipment, wherein the current booster realizes a primary large current output loop, and a primary side coil of the standard current transformer is wound on the primary large current output loop of the current booster;
(2) arranging a tested current transformer CT in GIS equipment between a main transformer magnetic sleeve and a bus, connecting the main transformer magnetic sleeve to the bus through a first isolating switch DS1, and arranging grounding switches ES1 and ES2 at two ends of the tested current transformer CT respectively;
(3) closing grounding switches ES1 and ES2, opening grounding metal sheets at one sides of the grounding switches ES1 and ES2 close to the ground end, and respectively connecting two ends of a primary lead of a primary large-current output loop of the current booster to the opened grounding metal sheets of the grounding switches ES1 and ES2, so that a tested current transformer CT is connected in series to the primary large-current output loop of the current booster;
(4) and respectively connecting the error test equipment to the secondary output ends of the standard current transformer and the tested current transformer CT.
A circuit breaker CB1 is arranged between the tested current transformer CT and the bus, and the circuit breaker CB1 is closed when the field error test system is constructed. The bus bar includes a first bus bar and a second bus bar. Second and third disconnecting switches DS2, DS3 are arranged between the circuit breaker CB1 and the bus, the second disconnecting switch DS2 is connected to the first bus, and the third disconnecting switch DS3 is connected to the second bus. When the field error test system is constructed, the first, second and third isolating switches DS1, DS2 and DS3 are turned off. The second isolator switch is connected in parallel with the third isolator switch. A first disconnecting switch DS1, a tested current transformer CT and a circuit breaker CB1 are connected in series to form a main transformer incoming line main circuit. Earthing switches ES1, ES2 are provided as main transformer incoming branches.
The access mode of the tested current transformer can greatly reduce the length of a primary bus which is turned back and the distance from the entrance of the magnetic sleeve to the grounding switch ES1, the length of the primary bus which participates in the upwash can be reduced to be within 5 meters, and the capacity of the upwash equipment is greatly reduced.
While the best mode for carrying out the invention has been described in detail and illustrated in the accompanying drawings, it is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the invention should be determined by the appended claims and any changes or modifications which fall within the true spirit and scope of the invention should be construed as broadly described herein.
Claims (6)
1. The utility model provides a GIS equipment current transformer's on-spot error test system, including the current booster, standard current transformer, by examination Current Transformer (CT) and error test equipment, the current booster realizes a heavy current output return circuit, the winding of standard current transformer's primary side coil is on the current booster is a heavy current output return circuit, by examination Current Transformer (CT) setting in the GIS equipment becomes between magnetic sleeve and bus, main magnetic sleeve that becomes is connected to the bus through first isolator (DS1), the both ends of being examined Current Transformer (CT) are equipped with earthing switch (ES1, ES2) respectively, its characterized in that:
two ends of a primary lead of a primary large current output loop of the current booster are respectively connected to grounding metal sheets on one sides of grounding switches (ES1, ES2) close to the ground end, the grounding metal sheets are arranged between the grounding switches and the ground end, the grounding switches (ES1, ES2) are in a closed state, a tested Current Transformer (CT) is connected in series to the primary large current output loop of the current booster, and error testing equipment is respectively connected to secondary output ends of a standard current transformer and the tested Current Transformer (CT);
second and third disconnecting switches (DS2, DS3) are arranged between the circuit breaker (CB1) and the bus, the second disconnecting switch (DS2) is connected to the first bus, and the third disconnecting switch (DS3) is connected to the second bus; the second isolating switch is connected with the third isolating switch in parallel;
the first disconnecting switch (DS1), the tested Current Transformer (CT) and the circuit breaker (CB1) are connected in series to form a main transformer incoming line main circuit; the earthing switches (ES1, ES2) form a main incoming line branch.
2. The field error test system of claim 1, wherein a circuit breaker (CB1) is disposed between the Current Transformer (CT) under test and the bus.
3. The field error testing system of claim 2, wherein the bus bar comprises a first bus bar and a second bus bar.
4. A construction method of a field error test system of a GIS equipment current transformer is characterized by comprising the following steps:
(1) providing a current booster, a standard current transformer, a tested Current Transformer (CT) and error testing equipment, wherein the current booster realizes a primary large current output loop, and a primary side coil of the standard current transformer is wound on the primary large current output loop of the current booster;
(2) arranging a tested Current Transformer (CT) in GIS equipment between a main transformer magnetic sleeve and a bus, connecting the main transformer magnetic sleeve to the bus through a first isolating switch (DS1), and arranging grounding switches (ES1 and ES2) at two ends of the tested Current Transformer (CT) respectively;
(3) closing grounding switches (ES1, ES2), opening grounding metal sheets at one sides of the grounding switches (ES1, ES2) close to the ground end, wherein the grounding metal sheets are arranged between the grounding switches and the ground end, and two ends of a primary lead of the primary high-current output circuit of the current booster are respectively connected to the opened grounding metal sheets of the grounding switches (ES1, ES2), so that a tested Current Transformer (CT) is connected in series to the primary high-current output circuit of the current booster;
(4) respectively connecting error test equipment to secondary output ends of a standard Current Transformer (CT) and a tested Current Transformer (CT);
second and third disconnecting switches (DS2, DS3) are arranged between the circuit breaker (CB1) and the bus, and the second disconnecting switch and the third disconnecting switch are connected in parallel; a second disconnector (DS2) connected to the first bus, a third disconnector (DS3) connected to the second bus, the first, second and third disconnectors (DS1, DS2, DS3) being opened when the field error test system is constructed; connecting a first disconnecting switch (DS1), a tested Current Transformer (CT) and a circuit breaker (CB1) in series to form a main transformer incoming line main circuit; earthing switches (ES1, ES2) are provided as main transformer incoming branches.
5. The method for building a field error test system according to claim 4, characterized in that a circuit breaker (CB1) is arranged between the tested Current Transformer (CT) and the bus, and the circuit breaker (CB1) is closed when the field error test system is built.
6. The method of constructing a field error testing system of claim 5, wherein the bus bar includes a first bus bar and a second bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532003.4A CN109324306B (en) | 2018-12-14 | 2018-12-14 | GIS equipment current transformer error testing system and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532003.4A CN109324306B (en) | 2018-12-14 | 2018-12-14 | GIS equipment current transformer error testing system and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109324306A CN109324306A (en) | 2019-02-12 |
| CN109324306B true CN109324306B (en) | 2021-11-23 |
Family
ID=65256220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811532003.4A Active CN109324306B (en) | 2018-12-14 | 2018-12-14 | GIS equipment current transformer error testing system and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109324306B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123050B (en) * | 2019-12-31 | 2022-06-10 | 中国能源建设集团华东电力试验研究院有限公司 | Transformer partial discharge test device for transformer and GIS in GIL connection mode |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7180300B2 (en) * | 2004-12-10 | 2007-02-20 | General Electric Company | System and method of locating ground fault in electrical power distribution system |
| CN201392393Y (en) * | 2009-03-23 | 2010-01-27 | 平高集团有限公司 | Error testing device of transformer |
| CN101644751A (en) * | 2009-08-11 | 2010-02-10 | 陕西电力科学研究院 | Method for raising distributed type large current of GIS bushing type current transformer |
| CN107749726A (en) * | 2017-10-17 | 2018-03-02 | 云南电网有限责任公司电力科学研究院 | A kind of GIS detecting current transformers flow up device and up-flow calibrating circuit with high current |
| CN107957569A (en) * | 2017-11-27 | 2018-04-24 | 国网福建省电力有限公司 | A kind of building block system experimental rig for field calibration GIS formula current transformers |
| CN207798935U (en) * | 2018-01-22 | 2018-08-31 | 云南电网有限责任公司临沧供电局 | Current transformer calibration device in integrated GIS pipelines |
| CN108089144B (en) * | 2018-02-07 | 2020-01-24 | 华北电力科学研究院有限责任公司 | Electronic current transformer field calibration system and method |
-
2018
- 2018-12-14 CN CN201811532003.4A patent/CN109324306B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109324306A (en) | 2019-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201812667U (en) | Electronic current and voltage combined transformer | |
| CN205643476U (en) | Outdoor zero sequence and phase sequence voltage measurement device | |
| CN103308832A (en) | Partial discharge test device for high-voltage cable insulation middle joint and use method | |
| CN106707126A (en) | Potential transformer electromagnetic transient modeling and analysis method of VFTO (very fast transient overvoltage) analysis of GIS (gas insulated switchgear) substation | |
| CN104880652A (en) | Switch cabinet live-line partial discharge test system and voltage signal extraction device thereof | |
| CN109188057A (en) | A kind of phase sequence zero sequence integration voltage sensor | |
| CN109324306B (en) | GIS equipment current transformer error testing system and construction method thereof | |
| CN105958354A (en) | 110kV/10kV and 110kV/35kV two pre-installed integrated intelligent substations | |
| CN102565614B (en) | Alternating voltage loop test method | |
| CN2930032Y (en) | Novel high voltage switch cabinet | |
| CN203552926U (en) | Electronic current transformer for disconnecting circuit breaker | |
| CN207251068U (en) | A kind of intelligent ring main unit of band metering | |
| WO2021175107A1 (en) | Testing method for double-fracture busbar disconnector in 220-kilovolt power transformation combined electrical device | |
| CN204789879U (en) | Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof | |
| CN103812086A (en) | High voltage electromotor protection system | |
| CN209148758U (en) | A kind of phase sequence zero sequence integration voltage sensor | |
| CN209232242U (en) | Modularization distribution line physical simulation experiment device | |
| CN211374930U (en) | Test transformer and combined electrical apparatus, cable combined type jointing equipment | |
| CN209016437U (en) | A kind of 10kV switchgear distribution system | |
| CN204905742U (en) | Middling pressure looped netowrk vacuum circuit breaker cabinet | |
| CN105510731A (en) | Parallel resonance detection alarming method and system for medium-voltage side power grid of power transformer | |
| CN205509359U (en) | Intelligent automatic supervision and control low pressure inlet wire switch board | |
| CN205160080U (en) | Intelligent low tension circuit of drawer type combination | |
| CN216390531U (en) | New forms of energy booster station owner becomes low pressure side secondary voltage collection system | |
| CN204905168U (en) | Be used for superconductive current -limiting formula direct current breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |