CN114977500A - Insulation monitoring method for double-transformer power supply system - Google Patents
Insulation monitoring method for double-transformer power supply system Download PDFInfo
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- CN114977500A CN114977500A CN202210606953.7A CN202210606953A CN114977500A CN 114977500 A CN114977500 A CN 114977500A CN 202210606953 A CN202210606953 A CN 202210606953A CN 114977500 A CN114977500 A CN 114977500A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/12—Monitoring network conditions, e.g. electrical magnitudes or operational status
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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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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/14—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network the power network being locally controlled, e.g. home energy management systems [HEMS]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
- H02J13/16—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network the power network being controlled at grid-level, e.g. using aggregators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
一种双变压器供电系统的绝缘监测方法，两套绝缘监测系统配合使用，正常情况下，母联柜断开，1#绝缘监测和2#绝缘监测独立运行；母联柜闭合时，2#绝缘监测装置停止运行，运行1#绝缘监测装置，监测范围为1#变压器与2#变压器之间的电路，解决了当前双变压器三合两电路绝缘监测系统无法实时监测和干扰的问题，本发明1#和2#两套绝缘监测装置实时通讯，实时监测故障并排除故障，提高了故障排查效率。
An insulation monitoring method for a dual-transformer power supply system. Two sets of insulation monitoring systems are used together. Under normal circumstances, the bus tie cabinet is disconnected, and 1# insulation monitoring and 2# insulation monitoring operate independently; when the bus tie cabinet is closed, the 2# insulation monitoring The monitoring device stops running, operates the 1# insulation monitoring device, and the monitoring range is the circuit between the 1# transformer and the 2# transformer, which solves the problem that the current dual-transformer three-in-two circuit insulation monitoring system cannot monitor and interfere in real time. The present invention 1 The two sets of insulation monitoring devices # and 2# communicate in real time, monitor and eliminate faults in real time, and improve the efficiency of troubleshooting.
Description
Technical Field
The invention relates to the field of electronic information, in particular to an insulation monitoring method of a double-transformer power supply system.
Background
With the continuous progress of the power grid industry in China, the safe operation of a power supply system faces greater challenges. The dual transformer power supply system is widely used not only to ensure the safe operation of the power supply system, but also to ensure the functional quality and the user power supply to be compatible with each other. The inlet wire of the double-transformer power supply system adopts a three-in-two circuit, namely, three cabinets can only be combined with 2 cabinets, and the three cabinets comprise: the system comprises a 1# incoming line cabinet, a 2# incoming line cabinet and a 3# bus coupler cabinet. Under normal conditions, when two ways of power supplies send electricity simultaneously, 1# inlet wire cabinet and 2# inlet wire cabinet take respective load respectively, and the bus coupler cabinet is in the separating brake state. When the power of any one of the power supplies of the No. 1 incoming line cabinet and the No. 2 incoming line cabinet is lost, the bus coupler cabinet is automatically switched on, the other transformer simultaneously carries loads on two sides to guarantee the power consumption of a user, and when the end which is originally powered off is restored to be powered on, the bus coupler cabinet is automatically switched off and is in the original standby state, and the emergency power supply is realized by the double-transformer three-in-two circuit. However, the existing insulation monitoring system can only be used for one group of transformer outgoing lines, and when the insulation monitoring system is applied to a double-transformer incoming line three-in-two circuit, injected signals can interfere with each other, and real-time monitoring cannot be achieved.
In order to solve the above problems, for example, chinese patent publication No. CN103595055B discloses a method for controlling the switching of the single operating state of two transformers in a dual-transformer system, which controls the switching of the dual-transformer power supply system between the respective independent operating states of T1 and T2 by controlling the switching states of the first high-voltage circuit breaker C1, the second high-voltage circuit breaker C2, the first low-voltage circuit breaker 1DL, the second low-voltage circuit breaker 2DL, and the third low-voltage circuit breaker 3DL of the dual-transformer power supply system, and adjusts the dual-transformer power supply system to be always in the most economical operating state according to the state monitoring of the dual-transformer power supply system, thereby achieving the purpose of saving energy. The control method for the operation state conversion of the two transformers in the double-transformer system has the advantages that the double-transformer power supply system can operate in the optimal energy-saving operation mode after power transmission, the method is simple and easy to implement, the purpose of energy saving can be achieved, and the like.
If chinese patent publication No. CN107728512B discloses an intelligent device with intelligent monitoring and switchable dual transformers, which comprises a transformer substation and a sensing module, wherein the sensing module is electrically connected to a data acquisition module, the data acquisition module is electrically connected to a data comparison module, the data comparison module is electrically connected to a wireless information sending module, and the wireless information sending module is electrically connected to a wireless information receiving module. This intelligent device with intelligent monitoring and changeable double-transformer has reached the first transformer in the execution module, second transformer and the Nth transformer operating temperature carry out induction remote transmission's effect, the data of induction module response is handled through data acquisition module and data contrast module after through wireless information sending module and wireless information receiving module remote transmission after conveying and is carried out data processing in the central processing unit, thereby the effectual transformer equipment who has solved in the remote area transformer substation hardly obtains the problem of monitoring in extreme weather.
At present, the above patents have certain disadvantages in the practical operation process: the first patent can make two transformer power supply system can move under the best energy-conserving operation mode after the power transmission, and the second patent has solved the problem that transformer equipment in the transformer substation of remote area is difficult to obtain the monitoring in extreme weather. Both the above two prior arts can monitor the power supply system of the double transformer, but the accuracy and stability of the system monitoring are affected by the signal interference, and the prior art still needs to be improved.
Disclosure of Invention
In order to solve the above problems, the present invention provides an insulation monitoring method for a dual-transformer power supply system.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an insulation monitoring method of a double-transformer power supply system comprises the following steps:
a starting step: starting 1# and 2# insulation monitoring;
judging the running state: judging the running state of a double-transformer 4P switch three-in-two power supply system;
a monitoring step: and (5) monitoring the power supply system in real time.
And (3) fault processing: if the fault is monitored, firstly judging the fault type, and then eliminating the fault.
Furthermore, two insulation monitoring systems of the double-transformer three-in-two power supply system are matched for use.
Further, the 1# insulation monitoring device and the 2# insulation monitoring device are in real-time communication.
Furthermore, the 1# insulation monitoring device signal acquisition access point is from the 1# transformer outgoing line to the 4P switch QF1 upper port, and the 2# insulation monitoring device signal acquisition access point is from the 2# transformer outgoing line to the 4P switch QF5 upper port.
Further, under normal condition, the bus-bar cabinet disconnection, 1# insulation monitoring device and 2# insulation monitoring device independent operation.
Further, when the power supply of the transformer on either side fails, the bus coupler cabinet is closed.
Further, in a normal state, the bus tie cabinet is disconnected, the 4P switch QF1 is switched on, the 4P switch QF3 is switched off, the 1# insulation monitoring device operates independently, the 1# insulation monitoring program is executed, and the monitoring range is from the 1# transformer outgoing line to the upper port of the 4P switch QF3 of the bus tie cabinet.
Further, in a normal state, the bus-bar cabinet is disconnected, the 4P switch QF5 is switched on, the 4P switch QF3 is switched off, the 2# insulation monitoring device operates independently, a 3# insulation monitoring program is executed, and the monitoring range is a circuit between an outgoing line of the 2# transformer and the bus-bar cabinet;
further, in the power supply fault state of the 1# transformer, when the bus coupler cabinet is closed and the 4P switch QF3 is switched on, the 4P switch QF5 is switched on, the 1# insulation monitoring device stops running, the 2# insulation monitoring device runs, and the 2# insulation monitoring program is executed, wherein the monitoring range is a circuit between the 1# transformer and the 2# transformer.
Further, in the power supply fault state of the 2# transformer, when the bus coupler cabinet is closed and the 4P switch QF1 is switched on, the 4P switch QF3 is switched on, the 2# insulation monitoring device stops running, the 1# insulation monitoring device runs, and the 2# insulation monitoring program is executed, wherein the monitoring range is a circuit between the 1# transformer and the 2# transformer.
Compared with the prior art, the invention has the beneficial effects that: according to the insulation monitoring method of the double-transformer power supply system, two sets of insulation monitoring systems are used in a matched mode, under a normal condition, a bus coupler cabinet is disconnected, and insulation monitoring 1# and insulation monitoring 2# operate independently; when the bus coupler cabinet is closed, the 2# insulation monitoring device stops running, the 1# insulation monitoring device runs, the monitoring range is a circuit between the 1# transformer and the 2# transformer, the problem that a current double-transformer three-in-two circuit insulation monitoring system cannot monitor and interfere in real time is solved, the 1# insulation monitoring device and the 2# insulation monitoring device communicate in real time, faults are monitored in real time, the faults are eliminated, and the fault troubleshooting efficiency is improved.
Drawings
FIG. 1 is a topological diagram of an insulation monitoring method of a dual-transformer power supply system according to the present invention;
fig. 2 is a schematic diagram of an insulation monitoring method of a dual-transformer power supply system according to the present invention.
Fig. 3 is a schematic diagram of the opening of the bus coupler cabinet of the insulation monitoring method of the double-transformer power supply system of the invention.
Fig. 4 is a switching-on schematic diagram of a bus coupler cabinet of an insulation monitoring method of a double-transformer power supply system.
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.
The invention provides a technical scheme that: an insulation monitoring method of a double-transformer power supply system is characterized in that two insulation monitoring systems of 1# insulation monitoring system and 2# insulation monitoring system are used in a matched mode, a bus-bar cabinet is located between a 1# outgoing line cabinet and a 2# outgoing line cabinet, a 1# insulation monitoring device is in real-time communication with a 2# insulation monitoring device, a signal acquisition line access point of the 1# insulation monitoring device is from the outgoing line of a 1# transformer to the upper opening of a 4P switch QF1 switch, and a signal acquisition line access point of the 2# insulation monitoring device is from the outgoing line of a 2# transformer to the upper opening of a 4P switch QF5 switch. The working process is as follows:
starting 1# and 2# insulation monitoring;
judging the running state of a double-transformer 4P switch three-in-two power supply system;
two sets of insulation monitoring systems of two transformer 4P switch three-in-one two power supply system 1# and 2# use, real-time communication, real-time supervision: under a normal condition, the bus tie cabinet is opened, the two sets of monitoring systems operate independently, the 4P switch QF1 is closed, the 4P switch QF3 is opened, the 4P switch QF5 is closed, the 1# insulation monitoring device (1# insulation monitoring program) and the 2# insulation monitoring device (3# insulation monitoring program) operate independently at the same time, the 1# insulation monitoring range is a circuit between the 1# transformer and the bus tie cabinet, and the 2# insulation monitoring range is a circuit between the 2# transformer and the bus tie cabinet;
if faults are monitored, the method specifically comprises the following application scenes:
when QF1 is switched on, QF3 is switched off, QF5 is switched on, and a 1# insulation monitoring device (1# insulation monitoring program) and a 2# insulation monitoring device (3# insulation monitoring program) are operated simultaneously; (application scenario: the monitoring range is from 1# transformer outgoing line to QF5 outgoing line, and the application environment is that when QF2 outgoing lines are all powered by 1# transformer, QF4 outgoing line power is provided by 2# transformer)
When QF1 is switched on, QF3 is switched off, QF5 is switched off, and meanwhile, a No. 1 insulation monitoring device (No. 1 insulation monitoring program) and No. 2 insulation monitoring are operated and stopped; (application scenario: the monitoring range is that only the QF2 outgoing line has power supply output, and the application environment is that when the QF2 outgoing lines are all powered by a 1# transformer, if other outgoing lines are not needed)
When QF1 is switched on, QF3 is switched on, QF5 is switched off, a 1# insulation monitoring device (a 2# insulation monitoring program) is operated, and 2# insulation monitoring is stopped; (application scenario: the monitoring range is from 1# transformer outgoing line to QF5 outgoing line, and the application environment is when the whole system is powered by 1# transformer, such as 2# transformer overhaul)
When QF1 is switched off, QF3 is switched on, and QF5 is switched on, stopping the 1# insulation monitoring device, and running 2# insulation monitoring (2# insulation monitoring program); (application scenario: the monitoring range is from 2# transformer outgoing line to QF2 outgoing line, and the application environment is when the whole system is powered by 1# transformer, such as 1# transformer overhaul)
When QF1 is opened, QF3 is opened, and QF5 is closed, the 1# insulation monitoring device is stopped, and 2# insulation monitoring (3# insulation monitoring program) is operated. (application scenario: the monitoring range is that only the QF4 outgoing line has power supply output, and the application environment is that when the QF4 outgoing lines are all powered by the 2# transformer, other outgoing lines are not needed).
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210606953.7A CN114977500B (en) | 2022-05-31 | 2022-05-31 | Insulation monitoring method for dual-transformer power supply system |
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| CN202210606953.7A CN114977500B (en) | 2022-05-31 | 2022-05-31 | Insulation monitoring method for dual-transformer power supply system |
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| CN114977500B CN114977500B (en) | 2025-09-02 |
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| CN1819400A (en) * | 2006-02-15 | 2006-08-16 | 贵阳铝镁设计研究院 | Continuous power supplier and power supply method with single-trunk segmental wiring |
| CN101710158A (en) * | 2008-12-09 | 2010-05-19 | 北京机械工业学院 | Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment |
| CN103208786A (en) * | 2013-04-16 | 2013-07-17 | 国家电网公司 | Rapid protection system of electric power substation |
| CN103606930A (en) * | 2013-11-29 | 2014-02-26 | 国网安徽省电力公司淮南供电公司 | Method for controlling automatic delivery of currents for first time running of double-transformer power supply system |
| CN105958354A (en) * | 2016-06-12 | 2016-09-21 | 山西济达变压器有限公司 | 110kV/10kV and 110kV/35kV two pre-installed integrated intelligent substations |
| CN108134378A (en) * | 2018-01-14 | 2018-06-08 | 东南大学 | A kind of DC protection system and direct current protecting implementation method |
| CN108270283A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | Automatic switch control system |
| CN210780097U (en) * | 2019-11-01 | 2020-06-16 | 天津百通电力科技发展有限公司 | A low-voltage power distribution system |
-
2022
- 2022-05-31 CN CN202210606953.7A patent/CN114977500B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1819400A (en) * | 2006-02-15 | 2006-08-16 | 贵阳铝镁设计研究院 | Continuous power supplier and power supply method with single-trunk segmental wiring |
| CN101710158A (en) * | 2008-12-09 | 2010-05-19 | 北京机械工业学院 | Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment |
| CN103208786A (en) * | 2013-04-16 | 2013-07-17 | 国家电网公司 | Rapid protection system of electric power substation |
| CN103606930A (en) * | 2013-11-29 | 2014-02-26 | 国网安徽省电力公司淮南供电公司 | Method for controlling automatic delivery of currents for first time running of double-transformer power supply system |
| CN105958354A (en) * | 2016-06-12 | 2016-09-21 | 山西济达变压器有限公司 | 110kV/10kV and 110kV/35kV two pre-installed integrated intelligent substations |
| CN108270283A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | Automatic switch control system |
| CN108134378A (en) * | 2018-01-14 | 2018-06-08 | 东南大学 | A kind of DC protection system and direct current protecting implementation method |
| CN210780097U (en) * | 2019-11-01 | 2020-06-16 | 天津百通电力科技发展有限公司 | A low-voltage power distribution system |
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| CN114977500B (en) | 2025-09-02 |
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