CN108287274B - Fault detection positioning device and method for GIS heating device at low temperature - Google Patents
Fault detection positioning device and method for GIS heating device at low temperature Download PDFInfo
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- CN108287274B CN108287274B CN201711365357.XA CN201711365357A CN108287274B CN 108287274 B CN108287274 B CN 108287274B CN 201711365357 A CN201711365357 A CN 201711365357A CN 108287274 B CN108287274 B CN 108287274B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a fault detection and positioning device and method for a GIS heating device at low temperature, wherein the method comprises the following steps: acquiring the sum of heating powers of all heating devices in the transformer substation, namely first heating power, judging whether the first heating power is smaller than first standard power, if not, determining that all the heating devices in the transformer substation are not in fault, and if so, acquiring second heating power in each area in the transformer substation; judging whether each second heating power is smaller than a second standard power, and if not, determining that all heating devices in the area corresponding to the second heating power are not in fault; if so, determining that the heating device in the area corresponding to the second heating power is in fault, and further determining the heating device in fault. Therefore, the device or the method provided by the invention can be used for monitoring the heating device on line in real time and positioning the heating device with faults quickly and accurately.
Description
Technical Field
The invention relates to the field of fault diagnosis and online monitoring, in particular to a fault detection positioning device and method applied to a heating device on a gas insulated fully-closed combined electrical appliance under a low-temperature condition.
Background
A Gas Insulated totally enclosed Switchgear (hereinafter referred to as GIS). The GIS is composed of a breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, all the equipment or components are enclosed in a metal grounded shell, and SF6 gas with certain pressure is filled in the metal grounded shell, so the GIS is also called as an SF6 fully-closed combined electrical appliance. Since the state of the SF6 gas changes under the influence of the external environment, particularly a low-temperature environment, if the SF6 gas inside the device is partially liquefied under the temperature reduction and the gas pressure is already lower than the working lockout gas pressure of the circuit breaker, the normal insulation and opening characteristics of the disconnector are affected. Therefore, protection of GIS in low temperature environments is essential. There are three general solutions: firstly, the use of the breaking capacity of the equipment is reduced as much as possible; secondly, mixed gas of SF6+ N2 is adopted to keep the rated parameters of the equipment unchanged; thirdly, a heating device is added in the equipment to ensure that the liquefaction pressure of the gas is higher than the working locking pressure. The most economical and practical scheme is to add a heating device in the equipment to ensure that the gas liquefaction pressure is higher than the working locking pressure.
Under the low temperature condition, if above-mentioned heating device breaks down, will influence the heating effect to gaseous SF6 in the GIS room, probably causes SF6 gaseous liquefaction scheduling problem, and then influences the normal work of circuit breaker and isolator. At present, the heating device is mainly inspected manually at regular intervals, and the heating device with the fault can not be positioned quickly and accurately by the method. Therefore, it is very important to monitor the heating device on the GIS at low temperature in real time and to position the fault heating device quickly and accurately.
Disclosure of Invention
The invention aims to provide a fault detection and positioning device and method for a GIS heating device at low temperature, which can monitor the heating device on line in real time and quickly and accurately position the heating device with faults.
In order to achieve the purpose, the invention provides the following scheme:
a fault detection and positioning device of a GIS heating device at low temperature is arranged on a transformer substation, the transformer substation comprises a plurality of areas, and an area power supply loop of each area is connected with a main power supply loop of the transformer substation; each zone comprises a plurality of gas insulated totally-enclosed combined electrical appliances, and each gas insulated totally-enclosed combined electrical appliance is connected with the zone power supply loop; each gas insulated totally-enclosed combined electrical apparatus is wrapped by a heating device; the transformer substation main power supply loop is a power supply loop of all the heating devices in the transformer substation; the zone power supply loop is the power supply loop of all the heating devices in the zone; the fault detection positioning device comprises: the current transformer comprises a first current transformer, a second current transformer and a controller; the first current transformer is arranged on a main power supply loop of the transformer substation; the second current transformer is arranged on the regional power supply loop; the controller is connected with the first current transformer and the second current transformer.
Optionally, the fault detection and location device further includes: a gas pressure sensor; the gas pressure sensor is arranged in a gas chamber of the gas insulated fully-closed combined electrical apparatus; the controller is also connected with the gas pressure sensor and used for acquiring the gas pressure of the gas chamber.
Optionally, the fault detection and location device further includes: a display; the controller is also connected with the display; the display is used for displaying the position of the heating device with fault.
Optionally, the fault detection and location device further includes: an alarm; the controller is also connected with the alarm; when heating device breaks down, the alarm carries out voice broadcast.
The invention also provides a fault detection and positioning method of the GIS heating device at low temperature, which is applied to the fault detection and positioning device; the fault detection and positioning method comprises the following steps:
acquiring first heating power; the first heating power is the sum of the heating powers of all the heating devices in the transformer substation;
judging whether the first heating power is smaller than a first standard power or not to obtain a first judgment result; the first standard power and the first heating power are heating powers determined at the same temperature;
if the first judgment result shows that the first heating power is greater than or equal to the first standard power, determining that all heating devices in the transformer substation are not in fault, and returning to the step of acquiring the first heating power;
if the first judgment result shows that the first heating power is smaller than the first standard power, determining that a heating device in the transformer substation breaks down, and acquiring second heating power in each area in the transformer substation; the second heating power is the sum of the heating powers of all the heating devices in the area;
judging whether each second heating power is smaller than a second standard power to obtain a second judgment result; the second standard power and the second heating power are heating powers determined at the same temperature;
if the second judgment result shows that the second heating power is greater than or equal to the second standard power, determining that all heating devices in the area corresponding to the second heating power are not in fault;
and if the second judgment result shows that the second heating power is smaller than the second standard power, determining that the heating device in the area corresponding to the second heating power has a fault.
Optionally, after determining that the heating device in the region corresponding to the second heating power fails, the method further includes
Acquiring the gas pressure of the gas chamber of each gas insulated totally-enclosed combined electrical apparatus in the region;
judging whether the gas pressure of each gas chamber is smaller than the standard gas pressure or not to obtain a third judgment result; the standard gas pressure and the gas pressure of the gas chamber are determined gas pressure at the same temperature;
if the third judgment result shows that the gas pressure of the gas chamber is greater than or equal to the standard gas pressure, determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber does not have a fault;
and if the third judgment result shows that the gas pressure of the gas chamber is smaller than the standard gas pressure, determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber breaks down.
Optionally, before the obtaining the first heating power, the method further includes:
establishing a standard database; the standard database includes a first standard power, a second standard power, and a standard gas pressure at different temperatures.
Optionally, the first standard power is the sum of heating powers of heating devices in the substation, which maintain the temperature of the gas in the gas chamber of all the gas insulated switchgear assemblies within a rated temperature range.
Optionally, the second standard power is the sum of heating powers of heating devices in each region of the substation, which are used for maintaining the temperature of the gas in the gas chamber of all the gas insulated switchgear assemblies within the rated temperature range.
Optionally, the standard gas pressure is a gas pressure of a gas chamber of the gas insulated fully-closed combined electrical appliance under a normal working condition.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a fault detection and positioning device and method for a GIS heating device at low temperature, wherein the method comprises the following steps: firstly, acquiring first heating power, wherein the first heating power is the sum of the heating powers of all heating devices in a transformer substation, judging whether the first heating power is smaller than first standard power, and if not, determining that all the heating devices in the transformer substation are not in fault; if so, determining that a heating device in the transformer substation breaks down, and acquiring second heating power in each area in the transformer substation; the second heating power is the sum of the heating powers of all the heating devices in the area; then judging whether each second heating power is smaller than a second standard power, wherein the second standard power and the second heating power are determined at the same temperature; if not, determining that all heating devices in the area corresponding to the second heating power do not have faults; if so, determining that the heating device in the area corresponding to the second heating power is in fault, namely determining the area where the fault heating device is located, and further determining the position of the fault heating device. Therefore, the device or the method provided by the invention can be used for monitoring the heating device on line in real time and positioning the heating device with faults quickly and accurately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a fault detection and location apparatus according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a fault detection and location method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a fault detection and positioning device and method for a GIS heating device at low temperature, which can monitor the heating device on line in real time and quickly and accurately position the heating device with faults.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The fault detection positioning device of the GIS heating device at the low temperature is arranged on a transformer substation, the transformer substation comprises a plurality of areas, and a regional power supply loop of each area is connected with a main power supply loop of the transformer substation; each zone comprises a plurality of gas insulated totally-enclosed combined electrical appliances, and each gas insulated totally-enclosed combined electrical appliance is connected with the zone power supply loop; each gas insulated totally-enclosed combined electrical apparatus is wrapped by a heating device; the transformer substation main power supply loop is a power supply loop of all the heating devices in the transformer substation; the zone power supply loop is the power supply loop of all the heating devices in the zone.
Fig. 1 is a schematic structural diagram of a fault detection and location device according to an embodiment of the present invention. As shown in fig. 1, the fault detection and location device provided by the present invention includes: a first current transformer 101, a plurality of second current transformers 102, a plurality of gas pressure sensors 103, a display 104, an alarm 105, and a controller 106.
The first current transformer 101 is arranged on the main power supply loop of the transformer substation and used for collecting power supply currents of all heating devices of the transformer substation. The second current transformer 102 is arranged on the regional power supply loop and used for collecting all power supply currents of the heating devices in each region of the transformer substation. The gas pressure sensor 103 is arranged in a gas chamber of the gas insulated totally-enclosed combined electrical appliance and is used for collecting the gas pressure of the gas chamber. The display 104 is used to display the location of the heating device that failed. Alarm 105 is used for when heating device breaks down, the alarm carries out voice broadcast.
A standard database and a transformer substation voltage value are stored in the controller 106; the controller 106 is connected with the first current transformer 101, the second current transformer 102, the gas pressure sensor 103, the display 104 and the alarm 105; the controller 106 is used for monitoring the heating device on line in real time and positioning the heating device with faults.
According to the embodiment of the invention, the first current transformer 101, the plurality of second current transformers 102, the plurality of gas pressure sensors 103, the display 104, the alarm 105 and the controller 106 are arranged, so that the effects of monitoring the heating device on line in real time and quickly and accurately positioning the heating device with faults are realized.
In order to achieve the purpose, the invention also provides a fault detection and positioning method of the GIS heating device at low temperature, and the fault detection and positioning method is applied to the fault detection and positioning device provided by the invention.
Fig. 2 is a schematic flow chart of a fault detection and location method according to an embodiment of the present invention, and as shown in fig. 2, the fault detection and location method provided by the present invention includes the following steps:
step 201: acquiring first heating power; the first heating power is the sum of the heating powers of all the heating devices in the substation.
Step 202: judging whether the first heating power is smaller than a first standard power or not to obtain a first judgment result; the first standard power and the first heating power are determined at the same temperature; that is, whether the first heating power is smaller than the first standard power under the current temperature condition is judged.
If the first determination result indicates that the first heating power is greater than or equal to the first standard power, executing step 203; if the first determination result indicates that the first heating power is smaller than the first standard power, step 204 is executed.
Step 203: and determining that all heating devices in the substation are not in fault, and returning to the step 201.
Step 204: determining that a heating device in the transformer substation fails, and acquiring second heating power in each area in the transformer substation; the second heating power is the sum of the heating powers of all the heating devices in the area.
Step 205: judging whether each second heating power is smaller than a second standard power to obtain a second judgment result; the second standard power and the second heating power are determined at the same temperature; that is, whether the second heating power is smaller than the second standard power under the current temperature condition is judged.
If the second determination result indicates that the second heating power is greater than or equal to the second standard power, execute step 206; if the second determination result indicates that the second heating power is smaller than the second standard power, step 207 is executed.
Step 206: and determining that all heating devices in the area corresponding to the second heating power are not in fault.
Step 207: and determining that the heating device in the region corresponding to the second heating power is in failure.
After step 207, the detection method further comprises:
step 208: and acquiring the gas pressure of the gas chamber of each gas insulated totally-enclosed combined electrical apparatus in the region.
Step 209: judging whether the gas pressure of each gas chamber is smaller than the standard gas pressure or not to obtain a third judgment result; the standard gas pressure and the gas pressure are determined at the same temperature; namely, whether the gas pressure of the gas chamber is smaller than the standard gas pressure under the current temperature condition is judged.
If the third determination result indicates that the gas pressure of the gas chamber is greater than or equal to the standard gas pressure, performing step 210; if the third determination result indicates that the gas pressure of the gas chamber is less than the standard gas pressure, step 211 is executed.
Step 210: and determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber does not have a fault.
Step 211: and determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber breaks down.
In addition, before executing step 201, the method further comprises: establishing a standard database; the standard database includes a first standard power, a second standard power, and a standard gas pressure at different temperatures. The first standard power and the second standard power are normal heating powers at a certain temperature, and specifically, the first standard power is the sum of the heating powers of heating devices in the substation, which are used for maintaining the temperature of gas in all gas chambers of the gas insulated fully-closed combined electrical apparatus within a rated temperature range. The second standard power is the sum of the heating powers of the heating devices in each region of the substation, which maintains the temperature of the gas in the gas chamber of all the gas insulated fully-enclosed switchgears within the rated temperature range. And the standard gas pressure is the gas pressure of a gas chamber of the gas insulated fully-closed combined electrical appliance under the normal working condition.
The invention discloses a fault detection and positioning device and method applied to a heating device on a gas insulated fully-closed combined electrical apparatus under a low-temperature condition, and aims to solve the problems that a certain heating device is not heated in a low-temperature environment and the like. Firstly, according to the heating power condition of a heating device under different temperature conditions under normal conditions, establishing a heating standard power database which comprises a first standard power and a second standard power, and establishing a gas standard air pressure database; a current transformer is arranged on a power supply loop of the heating device, and comprises a total power supply loop of a transformer substation and regional power supply loops of all regions, so that the total heating power (first heating power) of the heating device and the total heating power (second heating power) of the heating device in each region can be obtained; comparing the first heating power with the first standard power to know whether the heating device has a fault; comparing the second standard power with the second standard power to know whether the heating device in the area has a fault or not, and roughly positioning the heating device with the fault; and then, the gas pressure condition of the gas chamber of each gas insulated totally-enclosed combined electrical appliance in the fault area is judged, if the gas pressure of the gas chamber is lower than the standard gas pressure, the heating device corresponding to the gas chamber breaks down, the effects of monitoring the heating device on line in real time, quickly and accurately positioning the broken heating device are realized, and the reliability of the heating device is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The fault detection and positioning device of the GIS heating device at the low temperature is characterized in that the fault detection and positioning device is arranged on a transformer substation, the transformer substation comprises a plurality of areas, and an area power supply loop of each area is connected with a main power supply loop of the transformer substation; each zone comprises a plurality of gas insulated totally-enclosed combined electrical appliances, and each gas insulated totally-enclosed combined electrical appliance is connected with the zone power supply loop; each gas insulated totally-enclosed combined electrical apparatus is wrapped by a heating device; the transformer substation main power supply loop is a power supply loop of all the heating devices in the transformer substation; the zone power supply loop is the power supply loop of all the heating devices in the zone; the fault detection positioning device comprises: the current transformer comprises a first current transformer, a second current transformer and a controller; the first current transformer is arranged on a main power supply loop of the transformer substation; the second current transformer is arranged on the regional power supply loop; the controller is connected with the first current transformer and the second current transformer.
2. The fault detection and localization arrangement of claim 1, further comprising: a gas pressure sensor; the gas pressure sensor is arranged in a gas chamber of the gas insulated fully-closed combined electrical apparatus; the controller is also connected with the gas pressure sensor and used for acquiring the gas pressure of the gas chamber.
3. The fault detection and localization arrangement of claim 1, further comprising: a display; the controller is also connected with the display; the display is used for displaying the position of the heating device with fault.
4. The fault detection and localization arrangement of claim 1, further comprising: an alarm; the controller is also connected with the alarm; when heating device breaks down, the alarm carries out voice broadcast.
5. A fault detection and positioning method for a GIS heating device at low temperature is characterized in that the fault detection and positioning method is applied to the fault detection and positioning device of any one of claims 1-4; the fault detection and positioning method comprises the following steps:
acquiring first heating power; the first heating power is the sum of the heating powers of all the heating devices in the transformer substation;
judging whether the first heating power is smaller than a first standard power or not to obtain a first judgment result; the first standard power and the first heating power are heating powers determined at the same temperature;
if the first judgment result shows that the first heating power is greater than or equal to the first standard power, determining that all heating devices in the transformer substation are not in fault, and returning to the step of acquiring the first heating power;
if the first judgment result shows that the first heating power is smaller than the first standard power, determining that a heating device in the transformer substation breaks down, and acquiring second heating power in each area in the transformer substation; the second heating power is the sum of the heating powers of all the heating devices in the area;
judging whether each second heating power is smaller than a second standard power to obtain a second judgment result; the second standard power and the second heating power are heating powers determined at the same temperature;
if the second judgment result shows that the second heating power is greater than or equal to the second standard power, determining that all heating devices in the area corresponding to the second heating power are not in fault;
and if the second judgment result shows that the second heating power is smaller than the second standard power, determining that the heating device in the area corresponding to the second heating power has a fault.
6. The method according to claim 5, further comprising determining that the heating device in the region corresponding to the second heating power is faulty
Acquiring the gas pressure of the gas chamber of each gas insulated totally-enclosed combined electrical apparatus in the region;
judging whether the gas pressure of each gas chamber is smaller than the standard gas pressure or not to obtain a third judgment result; the standard gas pressure and the gas pressure of the gas chamber are determined gas pressure at the same temperature;
if the third judgment result shows that the gas pressure of the gas chamber is greater than or equal to the standard gas pressure, determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber does not have a fault;
and if the third judgment result shows that the gas pressure of the gas chamber is smaller than the standard gas pressure, determining that the heating device on the gas insulated fully-closed combined electrical appliance corresponding to the gas chamber breaks down.
7. The fault detection and location method of claim 5, further comprising, prior to said obtaining the first heating power:
establishing a standard database; the standard database includes a first standard power, a second standard power, and a standard gas pressure at different temperatures.
8. The fault detection and location method according to claim 5, wherein the first standard power is the sum of heating powers of heating devices in the substation that maintain the temperature of the gas in the gas chamber of all the gas insulated switchgear assemblies within a rated temperature range.
9. The fault detection and location method according to claim 5, wherein the second standard power is the sum of heating powers of heating devices in each zone of the substation, which maintain the temperature of the gas in all gas chambers of the gas insulated switchgear within a rated temperature range.
10. The fault detection and location method according to claim 6, wherein the standard gas pressure is a gas pressure of a gas chamber of the gas insulated fully-closed combined electrical appliance under a normal working condition.
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| CN1921048A (en) * | 2005-08-26 | 2007-02-28 | 吉林省电力科技有限公司 | Method for improving opening capability of SF circuit breaker in low-temperature behavior |
| KR100899996B1 (en) * | 2007-11-02 | 2009-05-29 | 삼성중공업 주식회사 | Heating pad malfunction detector |
| CN102508074B (en) * | 2011-11-03 | 2013-10-16 | 四川电力科学研究院 | Internal overheat fault monitoring method of metal sealed gas-insulated switchgear |
| CN204231355U (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Transformer station's lightguide cable link fault point GIS automatic station-keeping system |
| CN205049183U (en) * | 2015-10-23 | 2016-02-24 | 国家电网公司 | Sulfur hexafluoride switchgear synthesizes device of on -line monitoring and control |
| CN105571795B (en) * | 2016-03-15 | 2018-07-24 | 国网江苏省电力公司南京供电公司 | A kind of GIS principal faults diagnostic system and method |
| CN105974224A (en) * | 2016-04-27 | 2016-09-28 | 国家电网公司 | On-line monitoring system of intelligent substation 750kV GIS disconnecting link mechanism box heater |
| CN206116276U (en) * | 2016-06-23 | 2017-04-19 | 上海上芃电气有限公司 | SF6 electrical equipment of band cloud end control prevents liquefying plant |
| CN106771927B (en) * | 2017-01-04 | 2023-10-17 | 山东送变电工程有限公司 | GIS voltage withstand fault positioning method, fault cause judging method using same and positioning device |
| CN106971899B (en) * | 2017-05-05 | 2019-08-13 | 郑州大学 | One kind preventing the liquefied intelligent temperature control system of extremely frigid zones SF6 breaker arc extinguishing medium |
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