CN103336190B - Bis-mistake detection methods arranged side by side of PT - Google Patents
Bis-mistake detection methods arranged side by side of PT Download PDFInfo
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- CN103336190B CN103336190B CN201310211426.7A CN201310211426A CN103336190B CN 103336190 B CN103336190 B CN 103336190B CN 201310211426 A CN201310211426 A CN 201310211426A CN 103336190 B CN103336190 B CN 103336190B
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- 238000001514 detection method Methods 0.000 title claims description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 7
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- 238000012545 processing Methods 0.000 claims description 3
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Abstract
The present invention relates to a kind of Relay Protection Technology in Power System field, particularly relate to a kind of bis-mistakes of PT and detect device side by side, belong to Relay Protection Technology in Power System field.It is about Secondary Circuit of Potential Transformer problem, mainly solves power system voltage transformer secondary circuit problem arranged side by side by mistake.Bis-mistakes of PT detect device side by side, are to be connected with detected analog quantity by analog-to-digital conversion, and the output of analog-to-digital conversion is connected with the input of CPU microprocessor, and the output of CPU microprocessor is connected with Automatic monitoring systems and display and loudspeaker respectively.The present invention has been effectively ensured power train and has unified the safe and stable operation of secondary device, can become a device adapting to intelligent grid requirement, plays a role for ensureing that power system safety and stability runs.
Description
Technical field
The present invention relates to a kind of Relay Protection Technology in Power System field, particularly relate to a kind of bis-mistakes of PT and detect device side by side, belong to Relay Protection Technology in Power System field.It is about Secondary Circuit of Potential Transformer problem, mainly solves power system voltage transformer secondary circuit problem arranged side by side by mistake.
Background technology
At present of relay protection of power system conventional wisdom is that substantially: if the two of an electric substation sections of buses one are female and bus connection switch between two mothers is in the state of disconnection, then the secondary output terminals being connected on a bus voltage transformer and No. two voltage transformers being connected on two buses does not allow to carry out side by side.When only the bus connection switch between two sections of buses is in closing position, just allow to carry out the voltage transformer of two same models side by side at secondary side.Although allowing side by side, but be not necessarily to side by side, only a voltage transformer in two sections of buses problematic out of service time or the time of maintenance, the most side by side after primary side under the principle of secondary side arranged side by side, carry out the parallel operation of first and second side.
If the principle of secondary arranged side by side after violating the most once; in the case of primary side is in point row; secondary there occurs the most side by side; when there is ground connection or phase-to phase fault in the system at certain section of bus place; the measurement voltage making voltage transformer secondary can not truly reflect the situation of primary voltage, the most then make relay fail, Voltage Transformer Damages.Heavy then damage while voltage transformer and cause voltage transformer insulation damages that bus-bar fault occurs, cause large-area power-cuts.
Analyze from technological layer: cause reason by mistake the most arranged side by side to have a lot: 1, the fault of voltage transformer secondary automatic Synchronization device and use error reason；2, there are two sections of busbar voltage automatic switching loop irregular working reasons that disconnecting switch automatically controls；3, operation maintenance personnel maloperation reason etc..
All there is accident and the exception by mistake caused side by side because of voltage transformer secondary in Shenyang Power Supply Co. and national all power supply departments, works out a kind of can automatically quote by mistake and the device of column information is extremely urgent, and also the development with intelligent grid adapts.
Summary of the invention
For solving the technical problem of above-mentioned existence, the present invention provides a kind of bis-mistakes of PT to detect device side by side, purpose is when two sections of bus splittings of power system, automatically sends the sound and light signal that voltage transformer secondary is the most arranged side by side according to testing result, and prompting runs, dispatcher processes in time.
Bis-mistakes of PT detect device side by side, are to be connected with detected analog quantity by analog-to-digital conversion, and the output of analog-to-digital conversion is connected with the input of CPU microprocessor, and the output of CPU microprocessor is connected with Automatic monitoring systems and display and loudspeaker respectively.
Described detected analog quantity is secondary coil of voltage transformer.
Described microprocessor is ARM-LPC4357 chip.
Described analog-to-digital conversion has two group of four phase-voltage measurement and compares；The described A that detected analog quantity is two groups of secondary coil of voltage transformers, B, C, L terminal；Wherein analog-digital converter is connected to the A of two groups of secondary coil of voltage transformers, on B, C, L terminal.
The detection method that bis-mistakes of PT detect device side by side is: have two group of four phase-voltage measurement and the analog-digital converter that compares is connected to the A of two groups of secondary coil of voltage transformers, B, C, size and the phase place of two groups of voltages is gathered on L terminal, then with the form of digital quantity, sample information is exported to CPU microprocessor, two groups of data are analyzed processing by CPU microprocessor, then drive display and loudspeaker to send sound and light signal, whether conclusion the most arranged side by side will be occurred to send Automatic monitoring systems to simultaneously.
A CF voltage source U0 it is equipped with in a wherein phase of the one of which of two groups of described secondary coil of voltage transformers；Recycle " U0 measurement " device with single-phase voltage detection and the phase voltage of the same name of another group voltage transformer is carried out sampling analysis, if having adopted the voltage of this kind of frequency and size, it is considered as two sections of voltages and there occurs phenomenon arranged side by side by mistake, and export sound and optic signal.
Described voltage source U0 is the signal source of a non-work frequency.
Described CF voltage source U0 carries out voltage distribution by resistance R1, R2 to resistance R, by the ohmically pressure drop of R in the middle of detection, determines that two groups of secondary coil of voltage transformers are the most side by side；The frequency of described CF voltage source U0 is non-power-frequency voltage, and U0 is DC voltage.
Described secondary coil of voltage transformer is to be judged by the Sudden Changing Rate situation of change of phase voltage of the same name difference.
Advantages of the present invention and providing the benefit that:
The present invention is when when two sections of bus splittings of power system, to should not detecting by secondary coil of voltage transformer arranged side by side, automatically the sound and light signal that voltage transformer secondary is the most arranged side by side is sent according to testing result, information is passed to automatic dispatching system, and prompting runs, dispatcher processes in time.Power train is effectively ensured and has unified the safe and stable operation of secondary device.Apparatus of the present invention can become a device adapting to intelligent grid requirement, can be to ensure that power system safety and stability runs to play a role.
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited by embodiment.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention；
Fig. 2 is the structural representation of the present invention；
Fig. 3 is the embodiment schematic diagram again of the present invention.
In figure: detected analog quantity 1, analog-digital converter 2, display 3, loudspeaker 4, CPU microprocessor 5, Automatic monitoring systems 6, U0 voltage adds part 7, U0 voltage measuring section 8.
Detailed description of the invention
Embodiment 1:
The most as depicted in figs. 1 and 2, the present invention provides a kind of bis-mistakes of PT to detect device side by side, and concrete structure is as follows:
There is two group of four phase-voltage measurement and the analog-digital converter 2 that compares is connected to the A of two groups of secondary coil of voltage transformers, B, C, size and the phase place of two groups of voltages is gathered on L terminal, then with the form of digital quantity, sample information is exported to CPU microprocessor 5, whether two groups of data are analyzed processing by CPU microprocessor 5, then drive display 3 and loudspeaker 4 to send sound and light signal, conclusion the most arranged side by side will be occurred to send Automatic monitoring systems 6 to simultaneously.
This device is applicable to two groups of voltage transformers once the most side by side, and primary voltage has relatively large deviation, or two groups of voltage transformers have bigger property difference to make the voltage on two groups of voltage transformer secondary terminals have the situation of larger difference.
When being embodied as, heretofore described analog-to-digital conversion 2 is connected with detected analog quantity 1, the output of analog-to-digital conversion 2 is connected with the input of CPU microprocessor 5, and the output of CPU microprocessor 5 is connected with automated system 6 and display 3 and loudspeaker 4 respectively.Described detected analog quantity 1 is secondary coil of voltage transformer.Described microprocessor 5 is ARM-LPC4357 chip.
Embodiment 2:
Another embodiment of the present invention is to utilize applied voltage method.As shown in Figure 3, in a wherein phase of the one of which that specifically the voltage source U0 of a CF is added to two groups of secondary coil of voltage transformers, recycle " U0 measurement " device with single-phase voltage detection and the phase voltage of the same name of another group voltage transformer is carried out sampling analysis, if having adopted the voltage of this kind of frequency and size, it is considered as two sections of voltages and there occurs phenomenon arranged side by side by mistake, and export sound and optic signal.
The size of this additional CF driving voltage is the least, will not have influence on protection and, metering and about the work of device.
Embodiment 3:
Utilize following circuit: set specific frequency signal source U0 carries out voltage distribution by resistance R1, R2 to resistance R, by the ohmically pressure drop of R in the middle of detection, determine that two groups of secondary coil of voltage transformers are the most side by side.
When two groups of voltage secondaries are the most arranged side by side, the voltage of the specific voltage U0 frequency at R two ends is zero, and U0 can be DC voltage.
Embodiment 4:
It is this feature of sudden change by the variable quantity of phase voltage the most of the same name difference, carries out judging whether to there occurs voltage transformer secondary phenomenon arranged side by side by mistake by software program.
When being embodied as, can use one or more in above-mentioned four kinds of case methods constitute results or door or and gate logic, show that whether secondary voltage misses conclusion the most arranged side by side.
Concrete which kind of logical combination of employing completely can be according to on-the-spot voltage transformer carrying out practically situation and the long-term secondary numerical statistic data of secondary voltage.
Claims (1)
- Bis-mistake detection methods arranged side by side of 1.PT, it is characterized in that: the structure of the detecting device that the method uses is as follows, analog-digital converter (2) is connected with detected analog quantity (1), the output of analog-digital converter (2) is connected with the input of CPU microprocessor (5), and the output of CPU microprocessor (5) is connected with Automatic monitoring systems (6) and display (3) and loudspeaker (4) respectively；Described microprocessor (5) is ARM-LPC4357 chip；Described analog-digital converter (2) has the input terminal of two group of four phase voltage；The described A that detected analog quantity (1) is two groups of secondary coil of voltage transformers, the voltage of B, C, L terminal output；Wherein analog-digital converter (2) is connected to the A of two groups of secondary coil of voltage transformers, on B, C, L terminal；Bis-mistake detection methods arranged side by side of PT are: the analog-digital converter (2) with the input terminal of two group of four phase voltage is connected to the A of two groups of secondary coil of voltage transformers, B, C, size and the phase place of two groups of voltages is gathered on L terminal, then with the form of digital quantity, sample information is exported to CPU microprocessor (5), two groups of data are analyzed processing by CPU microprocessor (5), then drive display (3) and loudspeaker (4) to send sound and light signal, whether conclusion the most arranged side by side will be occurred to send Automatic monitoring systems (6) to simultaneously；A CF voltage source U0 it is equipped with in a wherein phase of the one of which of two groups of described secondary coil of voltage transformers；Recycle " U0 measurement " device with single-phase voltage detection and the phase voltage of the same name of another group voltage transformer is carried out sampling analysis, if having adopted the voltage of this kind of frequency and size, it is considered as two sections of voltages and there occurs phenomenon arranged side by side by mistake, and export sound and optic signal；Or the signal source that described voltage source U0 is a non-work frequency, voltage source U0 carries out voltage distribution by the resistance R1, R2 of series connection to resistance R, by the ohmically pressure drop of R in the middle of detection, determines that two groups of secondary coil of voltage transformers are the most side by side；Described secondary coil of voltage transformer is to carry out judging whether to occur the most side by side by the Sudden Changing Rate situation of change of phase voltage of the same name difference.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310211426.7A CN103336190B (en) | 2013-05-31 | 2013-05-31 | Bis-mistake detection methods arranged side by side of PT |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310211426.7A CN103336190B (en) | 2013-05-31 | 2013-05-31 | Bis-mistake detection methods arranged side by side of PT |
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| CN103336190A CN103336190A (en) | 2013-10-02 |
| CN103336190B true CN103336190B (en) | 2016-09-07 |
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| CN104333119B (en) * | 2014-10-30 | 2016-06-29 | 国家电网公司 | A kind of voltage parallel device with synchronized detection function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146391Y (en) * | 2008-01-29 | 2008-11-05 | 陈家斌 | Automatic switchover apparatus for juxtaposition economical operation of power transformer |
| CN101800442A (en) * | 2010-03-29 | 2010-08-11 | 许继集团有限公司 | Intelligent transformer substation voltage switching and paralleling method and device |
| CN202600048U (en) * | 2012-06-05 | 2012-12-12 | 四川省电力公司南充电业局 | Automatic PT (potential transformer) secondary voltage paralleling/switching system |
| CN103023029A (en) * | 2012-12-26 | 2013-04-03 | 井陉县供电公司 | Automatic parallel off and parallel control device for sectionalized power supply of single busbar |
| CN103105796A (en) * | 2012-12-17 | 2013-05-15 | 滁州安瑞电力自动化有限公司 | Intelligent potential transformer (PT) automatic connection and separation switch device |
| CN202949224U (en) * | 2012-11-30 | 2013-05-22 | 南京紫泉电力设计咨询有限公司 | Voltage transformer parallel device |
| CN203287466U (en) * | 2013-05-31 | 2013-11-13 | 国家电网公司 | PT secondary false-parallel-connection detection apparatus |
-
2013
- 2013-05-31 CN CN201310211426.7A patent/CN103336190B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146391Y (en) * | 2008-01-29 | 2008-11-05 | 陈家斌 | Automatic switchover apparatus for juxtaposition economical operation of power transformer |
| CN101800442A (en) * | 2010-03-29 | 2010-08-11 | 许继集团有限公司 | Intelligent transformer substation voltage switching and paralleling method and device |
| CN202600048U (en) * | 2012-06-05 | 2012-12-12 | 四川省电力公司南充电业局 | Automatic PT (potential transformer) secondary voltage paralleling/switching system |
| CN202949224U (en) * | 2012-11-30 | 2013-05-22 | 南京紫泉电力设计咨询有限公司 | Voltage transformer parallel device |
| CN103105796A (en) * | 2012-12-17 | 2013-05-15 | 滁州安瑞电力自动化有限公司 | Intelligent potential transformer (PT) automatic connection and separation switch device |
| CN103023029A (en) * | 2012-12-26 | 2013-04-03 | 井陉县供电公司 | Automatic parallel off and parallel control device for sectionalized power supply of single busbar |
| CN203287466U (en) * | 2013-05-31 | 2013-11-13 | 国家电网公司 | PT secondary false-parallel-connection detection apparatus |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Shenyang Power Supply Company of State Grid Liaoning Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: Liaoning Shenyang Electric Power Supply Co., Ltd. |
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