CN111239601B - Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment - Google Patents
Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment Download PDFInfo
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- CN111239601B CN111239601B CN202010146063.3A CN202010146063A CN111239601B CN 111239601 B CN111239601 B CN 111239601B CN 202010146063 A CN202010146063 A CN 202010146063A CN 111239601 B CN111239601 B CN 111239601B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The invention discloses a method for detecting a double-break bus disconnecting switch in 220 KV combined electrical equipment. The detection of the double-break bus isolating switch is as follows: closing one of the double-fracture bus isolating switches, applying voltage to the first bus and the second bus respectively, detecting two ends of the other non-closed double-fracture bus isolating switch respectively, then exchanging the closing relation of the double-fracture bus isolating switches, and repeating the voltage applying process to complete the detection of the double-fracture bus isolating switch. The invention completes the construction of the double-break bus isolating switch of double buses and standby spaced outgoing lines in the first-stage project, utilizes the alternate on-off of the double-break bus isolating switch, applies voltage on the double buses to complete the detection of the double-break bus isolating switch electric appliance, completes the detection of the double-break bus isolating switch electric appliance, has the same detection environment and state, detects and evaluates the double-break bus isolating switch electric appliances with consistent calibers, and the detection result truly reflects the condition of the first-stage project.
Description
Technical Field
The invention belongs to a detection technology of high-voltage substation equipment, and particularly relates to a detection technology of a double-break bus isolating switch in 220 KV combined electrical equipment.
Background
The newly built substations in China are generally built in stages according to needs, wherein most 220 KV power distribution devices of the substations are connected by double buses, and the double-bus connection construction is completed in the first-stage project. The conventional 220 kV combined electrical equipment can not meet the withstand voltage requirements of operating voltage and test voltage at the same time because the bus isolating switch only has one isolating fracture. Therefore, during extension, the standby interval installation and the handover voltage withstand test need to perform power failure treatment on the originally running double-bus incoming line. At present, most of domestic combined electrical appliances test methods only aim at combined electrical appliance equipment of the conventional single-break disconnecting switch. In the existing 220 KV transformer substation double-bus wiring, the problem of uninterrupted extension of a transformer substation perspective project can be solved by adopting the combined electrical equipment of the double-break bus isolating switch, such as a CN106374380BGIS bus standby interval uninterrupted extension function module and an extension method. At the spare outgoing line interval in the first-stage project, double-break bus isolating switch equipment is adopted for connecting double buses.
At present, the transformer substations applying the 220 KV double-break disconnecting switch technology combined electrical appliances have only two cases in China. In a first stage of engineering, a withstand voltage test needs to be performed on a 220 kv combined electrical apparatus, that is, related equipment is pressurized by adopting a variable frequency series resonance method, whether various hidden dangers (including damage in installation, transportation, storage, installation and debugging, existence of foreign matters and the like) causing internal faults exist after the 220 kv combined electrical apparatus is generally installed is checked, and whether the insulation performance of the 220 kv combined electrical apparatus meets the requirements is verified.
The existing detection of a double-break bus isolating switch in high-voltage transformation combined electrical equipment is to test novel double-break equipment by using a test method of the traditional single-break combined electrical equipment, and the principle needs to split the whole withstand voltage test of the double-break bus isolating switch (a spare interval) into two tests in different stages.
Stage one:
in the first-stage project, the installation and construction of the double-bus and 'standby' interval bus isolating switch are completed, and other equipment such as a circuit breaker and the like in the 'standby' interval is vacant. After the equipment is installed, the spare isolating switch is positioned in a separated position, the bus is reversely pressurized through any built outlet wire interval, and the bus side fracture of the spare double-fracture isolating switch meets the test requirement.
And a second stage:
when the 'standby' interval is expanded at a long term, after the equipment is installed, the double-break bus disconnecting switch is positioned in a separated position, and the circuit breaker is closed. At the moment, no matter whether the bus is electrified or not, the bus can be pressurized at the interval outgoing line sleeve, and the side fracture of the detection bus isolating switch circuit breaker meets the test requirement.
According to the scheme, the detection of the double-break bus isolating switch is divided into the first-stage detection and the second-stage detection, the detection period is long, and the environment and the state of the front detection and the back detection are different, so that the evaluation and the analysis of the double-break bus isolating switch electric appliance are not facilitated.
Disclosure of Invention
The invention aims to provide a withstand voltage test of a double-break bus isolating switch combined electrical apparatus, which realizes the detection of the double-break bus isolating switch combined electrical apparatus in the first-stage engineering.
The technical scheme of the invention is as follows: the bus comprises a first bus and a second bus; connect the first end of the first double-break isolator of double-break bus isolator on the first bus, connect the first end of the second double-break isolator of double-break bus isolator on the second bus, the second end of the first double-break isolator is connected with the second end of the second double-break isolator, and its characteristic is to the detection of double-break bus isolator as: closing one of the double-fracture bus isolating switches, applying voltage to the first bus and the second bus respectively, detecting two ends of the other non-closed double-fracture bus isolating switch respectively, then exchanging the closing relation of the double-fracture bus isolating switches, and repeating the voltage applying process to complete the detection of the double-fracture bus isolating switch.
The further optimization technical characteristics are as follows: the device also comprises a first spacing device outgoing line and a second spacing device outgoing line which are connected between the first bus and the second bus at least, and the voltage application to the first bus and the voltage application to the second bus are implemented through the first spacing device outgoing line and the second spacing device outgoing line respectively.
The further optimization technical characteristics are as follows: the applied voltage is applied to one bus and applied to the other bus by an operation voltage.
The further optimization technical characteristics are as follows: the voltage applying process comprises one or more of an aging test pressurizing process, an alternating voltage tolerance test pressurizing process or a partial discharge test pressurizing process.
The further optimization technical characteristics are as follows:
(1) closing a first breaker and a first bus first single-break disconnecting switch at intervals of a first interval equipment outgoing line, and enabling a second bus second single-break disconnecting switch to be in a separating position;
(2) closing a second breaker and a second bus fourth single-break disconnecting switch at intervals of a second interval equipment outgoing line, and enabling the second bus third single-break disconnecting switch to be in a separating position;
(3) closing a second double-break-port disconnecting switch on the second bus, wherein the middle grounding end of the second double-break-port disconnecting switch is positioned at a splitting position;
(4) opening a first double-break isolating switch on the first bus, wherein the indirect ground end in the first double-break isolating switch is grounded;
(5) applying operating voltage to the interval outgoing line side of the first interval equipment outgoing line, applying test voltage to the interval outgoing line side of the second interval equipment outgoing line, and detecting one detection end of the first double-break isolating switch; applying test voltage to the interval outgoing line side of the first interval equipment outgoing line, applying operating voltage to the interval outgoing line side of the second interval equipment outgoing line, and detecting the other end of the first double-fracture isolating switch;
(6) opening a second double-break disconnecting switch on the second bus, wherein the indirect ground end in the second double-break disconnecting switch is grounded;
(7) closing a first double-break-port isolating switch on the first bus, wherein the middle grounding end of the first double-break-port isolating switch is positioned at a splitting position;
(8) applying operating voltage to the interval outlet side of the first interval equipment outlet wire, applying test voltage to the interval outlet side of the second interval equipment outlet wire, and detecting one detection end of the second double-break disconnecting switch; and applying a test voltage on the interval outgoing line side of the second interval equipment outgoing line, applying an operating voltage on the interval outgoing line side of the second interval equipment outgoing line, and detecting the other end of the second double-break-port isolating switch.
The invention completes the construction of the double-break bus isolating switch of the double-bus and the standby interval outgoing line (long-term engineering) in the first-term engineering of the 220 KV transformer substation, utilizes the alternate on-off of the double-break bus isolating switch, applies voltage on the double-bus to complete the detection of the double-break bus isolating switch electric appliance, has the same detection environment and state, detects and evaluates the double-break bus isolating switch electric appliances with consistent calibers, and the detection result truly reflects the condition of the first-term engineering. Particularly, at least two interval outgoing lines which are already finished in the first project are used for pressurizing, so that the connection of pressurizing equipment is facilitated.
Drawings
Figure 1220 kilovolt double break bus bar isolation switch circuit structure schematic diagram.
FIG. 2 is a schematic view of a test pressurizing device
FIG. 3 is a schematic view of a test pressurization process.
Detailed Description
The following detailed description is provided for the purpose of explaining the claimed embodiments of the present invention so that those skilled in the art can understand the claims. The scope of the invention is not limited to the following specific implementation configurations. It is intended that the scope of the invention be determined by those skilled in the art from the following detailed description, which includes claims that are directed to this invention.
As shown in fig. 1, which is a partial schematic diagram of a power distribution device of a 220 kv substation, which has been constructed in a first project, the power distribution device comprises a first bus i of 220 kv and a second bus ii of 220 kv; the already built equipment comprises at least a first spacer outlet 1, a second spacer outlet 2; a double-break bus isolating switch is connected between the first bus I and the second bus II; in the embodiment, a first bus I is connected with a first end of a first double-fracture isolating switch DDS1 of a double-fracture bus isolating switch, and a second bus II is connected with a first end of a second double-fracture isolating switch DDS2 of the double-fracture bus isolating switch; i.e. the connection on the bus side of the double break bus disconnector. The second end of the first double-break disconnecting switch DDS1 is connected with the second end of the second double-break disconnecting switch DDS2, that is, the spare wire outgoing line side is connected, and the spare wire outgoing line side is connected with the circuit breaker CB. The spare outgoing line in the figure is a dotted line and represents a second-stage project which is not built yet.
The principle of a voltage applying device for implementing detection of the double-fracture bus isolating switch is shown in fig. 2, and the voltage applying device comprises a variable frequency controller FC, an exciting transformer Tr, a high-voltage inductor L, a test article capacitor Cx and measuring voltage dividers C1 and C2. The voltage adding device is an existing conventional test voltage adding device.
And two sets of voltage pressurizing devices are respectively connected with outgoing sleeves of the first interval equipment outgoing line 1 and the second interval equipment outgoing line 2.
The test power supply is taken from a power distribution equipment room maintenance box, a switch larger than 100A is selected, and the power supply is selected to have enough margin, so that the power utilization safety is guaranteed.
The test process of the double-break bus isolating switch is as follows:
(1) closing a first breaker and a first bus first single-break-port disconnecting switch DES3 at intervals of the first interval equipment outgoing line, and enabling a second bus second single-break-port disconnecting switch DS4 to be in a separated position;
(2) closing a second breaker and a second bus fourth single-break-port disconnecting switch DS6 at intervals of a second interval equipment outgoing line, and enabling a first bus third single-break-port disconnecting switch DES5 to be in a separating position;
(3) closing a second double-break disconnecting switch DDS2 on the second bus, wherein the middle grounding end of the second double-break disconnecting switch is in a disconnection state;
(4) opening a first double-break disconnecting switch DDS1 on the first bus, wherein the ground end in the first double-break disconnecting switch is grounded;
(5) applying operating voltage to the interval outgoing line side of the first interval equipment outgoing line, applying test voltage to the interval outgoing line side of the second interval equipment outgoing line, and detecting one detection end of the first double-break isolating switch; applying test voltage to the interval outgoing line side of the first interval equipment outgoing line, applying operating voltage to the interval outgoing line side of the second interval equipment outgoing line, and detecting the other end of the first double-fracture isolating switch;
(6) opening a second double-break disconnector DDS2 on the second bus, wherein the ground end in the second double-break disconnector is grounded;
(7) closing a first double-break disconnecting switch DDS1 on the first bus, wherein the middle grounding end of the first double-break disconnecting switch is in a separated position;
(8) applying operating voltage to the interval outlet side of the first interval equipment outlet wire, applying test voltage to the interval outlet side of the second interval equipment outlet wire, and detecting one detection end of the second double-break disconnecting switch; and applying a test voltage on the interval outgoing line side of the second interval equipment outgoing line, applying an operating voltage on the interval outgoing line side of the second interval equipment outgoing line, and detecting the other end of the second double-break-port isolating switch.
The procedure for applying the test voltage is shown in fig. 3.
The above step sequence is not unique, and can be adjusted according to the field situation based on the technical scheme of the invention.
The process realizes an aging test, an alternating voltage tolerance test and a partial discharge test on the bus side and the spare wire leading-out line side of the double-break bus isolating switch which is constructed in the first-stage project.
Claims (3)
1. A detection method for a double-break bus isolating switch in 220 KV power transformation combined electrical equipment comprises a first bus and a second bus; the first bus is connected with a first end of a first double-fracture bus isolating switch, the second bus is connected with a first end of a second double-fracture bus isolating switch, a second end of the first double-fracture bus isolating switch is connected with a second end of the second double-fracture bus isolating switch, at least a first spacing equipment outgoing line and a second spacing equipment outgoing line are connected between the first bus and the second bus; the method is characterized in that: the detection of the first double-fracture bus isolating switch and the second double-fracture bus isolating switch is as follows: closing a double-fracture bus isolating switch, and applying voltage to a first bus and a second bus respectively, wherein the applied voltage is to apply operating voltage to one bus and apply test voltage to the other bus; the application of the voltage to the first bus and the second bus is performed through a first spacer outgoing line and a second spacer outgoing line respectively; after the two ends of the other unclosed double-break bus isolating switch are respectively detected; and then switching the on-off relation of the double-fracture bus isolating switch, and repeating the voltage applying process to complete the detection of the double-fracture bus isolating switch.
2. The method for detecting the double-break bus disconnecting switch in the 220 KV power transformation combined electrical equipment as claimed in claim 1, is characterized in that: the test voltage applying process comprises one or more of an aging test pressurizing process, an alternating voltage tolerance test pressurizing process or a partial discharge test pressurizing process.
3. The method for detecting the double-break bus disconnecting switch in the 220 KV power transformation combined electrical equipment as claimed in claim 1, is characterized in that:
(1) closing a first breaker and a first bus first single-break disconnecting switch at intervals of a first interval equipment outgoing line, and enabling a second bus second single-break disconnecting switch to be in a separating position;
(2) closing a second breaker and a second bus fourth single-break disconnecting switch at intervals of a second interval equipment outgoing line, and enabling the first bus third single-break disconnecting switch to be in a separating position;
(3) closing a second double-break bus disconnecting switch on the second bus, wherein the middle grounding end of the second double-break bus disconnecting switch is positioned at a separation position;
(4) opening a first double-fracture bus isolating switch on the first bus, wherein the indirect grounding end in the first double-fracture bus isolating switch is grounded;
(5) applying operating voltage to the outgoing line side of the outgoing line of the first spacer equipment at intervals, applying test voltage to the outgoing line side of the outgoing line of the second spacer equipment at intervals, and detecting one end of the first double-fracture bus isolating switch; applying test voltage to the outgoing line side of the outgoing line of the first spacer equipment at intervals, applying operating voltage to the outgoing line side of the outgoing line of the second spacer equipment at intervals, and detecting the other end of the first double-fracture bus isolating switch;
(6) opening a second double-break bus disconnecting switch on the second bus, wherein the indirect grounding end in the second double-break bus disconnecting switch is grounded;
(7) closing a first double-fracture bus isolating switch on the first bus, wherein the middle grounding end of the first double-fracture bus isolating switch is positioned at a separation position;
(8) applying operating voltage to the outgoing line side of the outgoing line of the first interval equipment at intervals, applying test voltage to the outgoing line side of the outgoing line of the second interval equipment at intervals, and detecting one end of the second double-fracture bus disconnecting switch; and applying test voltage to the interval outlet side of the second interval equipment outgoing line, applying operating voltage to the interval outlet side of the second interval equipment outgoing line, and detecting the other end of the second double-fracture bus disconnecting switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146063.3A CN111239601B (en) | 2020-03-05 | 2020-03-05 | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment |
| PCT/CN2021/075959 WO2021175107A1 (en) | 2020-03-05 | 2021-02-08 | Testing method for double-fracture busbar disconnector in 220-kilovolt power transformation combined electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146063.3A CN111239601B (en) | 2020-03-05 | 2020-03-05 | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment |
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| Publication Number | Publication Date |
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| CN111239601A CN111239601A (en) | 2020-06-05 |
| CN111239601B true CN111239601B (en) | 2022-01-25 |
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| CN202010146063.3A Active CN111239601B (en) | 2020-03-05 | 2020-03-05 | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment |
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| WO (1) | WO2021175107A1 (en) |
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| CN111239601B (en) * | 2020-03-05 | 2022-01-25 | 湖北省电力勘测设计院有限公司 | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment |
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| KR20100049413A (en) * | 2008-11-03 | 2010-05-12 | 현대중공업 주식회사 | Monitoring device for circuit breaker |
| CN102590717A (en) * | 2012-02-14 | 2012-07-18 | 重庆市电力公司电力科学研究院 | Withstand voltage testing method for geographic information system (GIS) |
| JP2012149915A (en) * | 2011-01-17 | 2012-08-09 | Chugoku Electric Power Co Inc:The | Breaker testing apparatus, program and breaker testing method |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN106129887A (en) * | 2016-06-29 | 2016-11-16 | 河南平芝高压开关有限公司 | GIS prepared separation, outside line enlargement method and GIS device |
| CN106374380A (en) * | 2016-11-17 | 2017-02-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | GIS bus spare interval power-uninterrupted extension function module and extension method |
| CN107482523A (en) * | 2017-09-21 | 2017-12-15 | 中国能源建设集团广东省电力设计研究院有限公司 | Double bus scheme GIS device and its repair method, pressure test method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239601B (en) * | 2020-03-05 | 2022-01-25 | 湖北省电力勘测设计院有限公司 | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment |
-
2020
- 2020-03-05 CN CN202010146063.3A patent/CN111239601B/en active Active
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2021
- 2021-02-08 WO PCT/CN2021/075959 patent/WO2021175107A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100049413A (en) * | 2008-11-03 | 2010-05-12 | 현대중공업 주식회사 | Monitoring device for circuit breaker |
| JP2012149915A (en) * | 2011-01-17 | 2012-08-09 | Chugoku Electric Power Co Inc:The | Breaker testing apparatus, program and breaker testing method |
| CN102590717A (en) * | 2012-02-14 | 2012-07-18 | 重庆市电力公司电力科学研究院 | Withstand voltage testing method for geographic information system (GIS) |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN106129887A (en) * | 2016-06-29 | 2016-11-16 | 河南平芝高压开关有限公司 | GIS prepared separation, outside line enlargement method and GIS device |
| CN106374380A (en) * | 2016-11-17 | 2017-02-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | GIS bus spare interval power-uninterrupted extension function module and extension method |
| CN107482523A (en) * | 2017-09-21 | 2017-12-15 | 中国能源建设集团广东省电力设计研究院有限公司 | Double bus scheme GIS device and its repair method, pressure test method |
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| Publication number | Publication date |
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| WO2021175107A1 (en) | 2021-09-10 |
| CN111239601A (en) | 2020-06-05 |
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Address after: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee after: Hubei Electric Power Planning, Design and Research Institute Co.,Ltd. Address before: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee before: POWERCHINA HUBEI ELECTRIC ENGINEERING Corp.,Ltd. |