CN105137264A - Protective device aimed at fault collection terminal detection and method thereof - Google Patents
Protective device aimed at fault collection terminal detection and method thereof Download PDFInfo
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- CN105137264A CN105137264A CN201510520573.1A CN201510520573A CN105137264A CN 105137264 A CN105137264 A CN 105137264A CN 201510520573 A CN201510520573 A CN 201510520573A CN 105137264 A CN105137264 A CN 105137264A
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Abstract
The invention discloses a protective device aimed at fault collection terminal detection and a method thereof. The protective device aimed at fault collection terminal detection comprises an isolation transformer, a power supply switching module, a control module, a voltage short circuit protection sampling module and a current open circuit protection sampling module; the power supply switching module is connected to the power supply trough an isolation transformer; the power supply switching module is directly connected to the power supply; the power supply switching module is connected to three-phase current; the control module is in communication connection with the power supply switching module, the voltage short circuit protection sampling module and the current open circuit protection sampling module. The protective device disclosed by the invention can be effectively compatible with various kinds of collection terminals, solves the problem that the whole detection device system is damaged because of the faulted terminal, reduces the faults made by the terminal testing device and the damage probability, and improves the safety and the operation efficiency of the detection of the fault sampling terminal.
Description
Technical field
The present invention relates to power information collecting device detection field, be specifically related to a kind of protective device for fault acquiring terminal detection and method.
Background technology
Because terminal equipment failure is of a great variety, phenomenon of the failure is also different, be difficult to from directly finding out failure cause on the surface, also develop various termination function fault test set in laboratory thereupon, but because the failure cause of failed terminals is indefinite, failed terminals is placed on test stage body hastily and test, very easily damage proving installation, even cause immeasurable loss.The protective device that a kind of fault acquiring terminal of present urgent need detects, can adapt to various different types of terminal automatically, has and automatically protects terminal test device and the test result not affecting terminal.Reduce terminal test device to make mistakes the probability even damaged, improve security and operational efficiency that fault acquiring terminal detects.
Summary of the invention
For solving the deficiency that prior art exists; the invention discloses protective device and the detection method of the detection of a kind of fault acquiring terminal; this device can adapt to various different types of terminal automatically; have and automatically protect terminal test device and the test result not affecting terminal; by detecting the voltage of failed terminals and current path; the plant-grid connection pattern of automatic handling failure terminal, and auto-breaking operation is carried out to failed terminals, to avoid damaging other equipment in pick-up unit.
For achieving the above object, concrete scheme of the present invention is as follows:
A kind of protective device detected for fault acquiring terminal, comprise isolating transformer, electrical source exchange module, control module, voltage short-circuit protection sampling module and current open protection sampling module, electrical source exchange module is connected with power supply by isolating transformer, electrical source exchange module is also directly connected with power supply simultaneously, and control module protects sampling module to communicate with electrical source exchange module, voltage short-circuit protection sampling module and current open respectively;
Control module is by voltage short-circuit protection sampling module read failure terminal input voltage amplitude; control module is by current open protection sampling module reading terminals input current amplitude; control module controls electrical source exchange module according to voltage amplitude and realizes isolating transformer access module or direct access module, and control module controls according to current amplitude the input current that electrical source exchange module realizes disconnecting or connecting failed terminals.
Described power supply is three-phase four-wire system power supply, described electrical source exchange module comprises voltage switching module and current switching module, voltage switching module is made up of two group relaies, last group is made up of three single-pole double-throw relay, the normally closed terminal of each relay is connected with the power end through isolating transformer, Chang Kaiduan is connected every the power end of transformer with not crossing, and the power end that the power end of the isolating transformer that the normally closed terminal of each relay is corresponding is sub corresponding with Chang Kaiduan is the same phase line of power supply; Latter one group is made up of the relay of three single-pole single-throw (SPST)s, and the input of a rear group relay is sent in the output of last group relay, and whether a rear group relay is used for control voltage and finally exports; Current switching module is made up of the relay of three single-pole single-throw (SPST)s, and relay terminal connects electric current anode I+ and electric current negative terminal I-, controls short circuit current.
Described voltage short-circuit protection sampling module is connected with the output terminal of electrical source exchange module, and current open protection sampling module is connected with the output terminal of electrical source exchange module.
Described control module is made up of ARM high speed processor, and for the reading of the electric current and voltage sampled signal to failed terminals, the state with setting compares, the protecting control signal of output voltage electric current.
Control module has judged whether voltage short circuit or current open event, thus has controlled electrical source exchange module work after receiving the signal of voltage short-circuit protection sampling module and current open protection sampling module.
Described voltage short-circuit protection sampling module is made up of multipath high-speed AD sampling A/D chip and voltage transformer (VT), completes and carries out sampling detection to the input voltage of failed terminals.
Voltage short-circuit protection sampling module, by after voltage signal dividing potential drop, is sampled by AD, is delivered to control module.Whether decline for detecting voltage, thus judge current return whether short circuit or power abnormal (voltage drop).
Described current open protection sampling module is made up of multipath high-speed AD sampling A/D chip and current transformer, completes and carries out sampling detection to the input current of failed terminals.
Current open protection sampling module, by the output signal of current transformer, is sampled by AD, is delivered to control module, whether have electric current, thus judge whether current return opens a way for detecting current return.
For a method of work for the protective device that fault acquiring terminal detects, comprise the following steps:
When being energized to failed terminals for the first time, by control module control voltage short-circuit protection sampling module read failure terminal input voltage amplitude, whether failure judgement terminal voltage loop is normal, if failed terminals input voltage terminal shortcircuit, then electrical source exchange module is by disconnected end input voltage; When failed terminals Input voltage terminal working properly and without short trouble after, the power-frequency voltage signal of power supply, by electrical source exchange module bypass isolating transformer, makes the input voltage of failed terminals directly be accessed by three-phase standard source external power source;
Electrical source exchange module is also connected with the current input terminal of failed terminals; if the current input terminal of failed terminals breaks down; then control module will get the abnormal signal of current protection sampling module output; export control signal simultaneously, disengagement failure terminal input current will be disconnected fast by electrical source exchange module.
Beneficial effect of the present invention:
Can compatible various dissimilar acquisition terminal effectively by protective device of the present invention; solve because failed terminals causes the problem of whole pick-up unit system failure; reduce terminal test device to make mistakes the probability even damaged, improve security and operational efficiency that fault acquiring terminal detects.
Accompanying drawing explanation
Fig. 1 integrated circuit back panel wiring of the present invention schematic diagram;
Fig. 2 overall wiring schematic diagram of the present invention.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, a kind of protective device detected for fault acquiring terminal, this protective device is primarily of formations such as isolating transformer, electrical source exchange module, control module, voltage short-circuit protection sampling module, current open protection sampling modules.
Isolating transformer is made up of three road 1:1 isolating transformers, increases first-level buffer, effectively avoids causing the faults such as the tripping operation of three-phase and four-line input power, damage because of the voltage short circuit of rear class failed terminals.
Electric current outputs to the positive pole current terminal I+ of failed terminals by current source, gets back to current source by the cathodal current terminal I-of failed terminals.
As shown in Figure 2; three-phase standard source output voltage electric current is to protective device; electric current and voltage after protected outputs to pick-up unit, and this voltage and current signal is subject to pick-up unit and controls rear (measure voltage & current is the part of functions in pick-up unit), outputs to failed terminals to be checked.Protective device mainly plays the effect ensureing electric current and voltage power supply safety in this link.
A kind of protective device that the present invention detects mainly for fault acquiring terminal, can effectively reduce and avoid failed terminals to the damage of proving installation, this device can effectively be isolated the power supply of failed terminals and increase the functions such as software control, to the voltage short circuit of failed terminals, the problems such as current open can effectively be protected, in structural design, fully take into account concentrator, collector, single-phase electric energy meter, three-phase electric energy meter, the Power supply principle of the plurality of devices such as special transformer terminals, use identical protection mechanism, reduce the complicacy that tested failed terminals connects.
The present invention is by building a protective device of a software-controllable of failed terminals detection system, voltage protection, current protection, shielding system; realize the available protecting to the different faults of different types of terminals, achieve the protection to failed terminals pick-up unit simultaneously.
Power-frequency voltage is provided by three-phase voltage source, is divided into two-way to access electrical source exchange module, leads up to isolating transformer, and a road is directly accessed, and realizes the voltage terminal which outputs to failed terminals to be measured in electrical source exchange module.
Signal stream handling principle: when being energized to failed terminals for the first time; power-frequency voltage is by isolating transformer (T1; T2; T3) power; by control module control voltage short-circuit protection sampling module reading terminals input voltage amplitude; whether failure judgement terminal voltage loop is normal; if failed terminals input voltage terminal shortcircuit; then electrical source exchange module will disconnected end input voltage; isolating transformer (T1, T2, T3) realizes second protection; isolate mainly for the protection of three-phase and four-line voltage output end and input end, avoid three-phase supply abnormal damage.When failed terminals Input voltage terminal working properly and without catastrophic failures such as short circuits after, power-frequency voltage signal by electrical source exchange module bypass isolating transformer, makes the input voltage of failed terminals directly be accessed by external power sources such as three-phase standard sources.Voltage measurement error is adopted in the friendship eliminated due to isolating transformer introducing.
The bypass of power-frequency voltage signal is implemented by electrical source exchange module, and control signal provides control after voltage signal normal condition being detected by control module.
Failed terminals is being carried out in the process of the test of power information acquisition terminal AC sampling part; need to access three-phase current; three-phase current refers to that failed terminals provides the standard source of electric current herein; if there are open circuit or other faults in the current terminal of failed terminals; then control module will get the abnormal signal of current protection sampling module output; export control signal simultaneously; disengagement failure terminal input current will be disconnected fast by electrical source exchange module, and avoid causing the device damage such as three-phase current source because of fault terminal abnormal.Voltage short-circuit protection sampling module, current open protection sampling module and energy supply control module control by control module, have realized fully-automated synthesis, control; and directly and external communication device, as PC etc. directly communicates, full automation operation can be realized; real-time performance is good, and security is high.
This device can adapt to the multiple power information collecting device such as concentrator, collector, electric energy meter, specially transformer terminals, can carry out available protecting, realize automatically being energized, power operation to the detection of various faults acquisition terminal.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. the protective device detected for fault acquiring terminal, it is characterized in that, comprise isolating transformer, electrical source exchange module, control module, voltage short-circuit protection sampling module and current open protection sampling module, electrical source exchange module is connected with power supply by isolating transformer, electrical source exchange module is also directly connected with power supply simultaneously, and control module protects sampling module to communicate with electrical source exchange module, voltage short-circuit protection sampling module and current open respectively;
Control module is by voltage short-circuit protection sampling module read failure terminal input voltage amplitude; control module is by current open protection sampling module reading terminals input current amplitude; control module controls electrical source exchange module according to voltage amplitude and realizes isolating transformer access module or direct access module, and control module controls according to current amplitude the input current that electrical source exchange module realizes disconnecting or connecting failed terminals.
2. as claimed in claim 1 a kind of for fault acquiring terminal detect protective device, it is characterized in that, described power supply is three-phase four-wire system power supply, described electrical source exchange module comprises voltage switching module and current switching module, voltage switching module is made up of two group relaies, last group is made up of three single-pole double-throw relay, and the normally closed terminal of each relay is connected with the power end through isolating transformer, and Chang Kaiduan is connected every the power end of transformer with not mistake; Latter one group is made up of the relay of three single-pole single-throw (SPST)s, and the input of a rear group relay is sent in the output of last group relay, and whether a rear group relay is used for control voltage and finally exports.
3. a kind of protective device detected for fault acquiring terminal as claimed in claim 2, it is characterized in that, the power end that the power end of the isolating transformer that the normally closed terminal of each relay is corresponding is sub corresponding with Chang Kaiduan is the same phase line of power supply.
4. as claimed in claim 2 a kind of for fault acquiring terminal detect protective device, it is characterized in that, current switching module is made up of the relay of three single-pole single-throw (SPST)s, relay terminal connect electric current anode I+ and electric current negative terminal I-, control short circuit current.
5. as claimed in claim 1 a kind of for fault acquiring terminal detect protective device; it is characterized in that; described voltage short-circuit protection sampling module is connected with the output terminal of electrical source exchange module, and current open protection sampling module is connected with the output terminal of electrical source exchange module.
6. as claimed in claim 1 a kind of for fault acquiring terminal detect protective device; it is characterized in that; described control module is made up of ARM high speed processor; for the reading of the electric current and voltage sampled signal to failed terminals; state with setting compares, the protecting control signal of output voltage electric current.
7. as claimed in claim 6 a kind of for fault acquiring terminal detect protective device; it is characterized in that; after control module receives the signal of voltage short-circuit protection sampling module and current open protection sampling module; judge whether voltage short circuit or current open event, thus control electrical source exchange module work.
8. as claimed in claim 1 a kind of for fault acquiring terminal detect protective device, it is characterized in that, described voltage short-circuit protection sampling module is made up of multipath high-speed AD sampling A/D chip and voltage transformer (VT), completes and carries out sampling detection to the input voltage of failed terminals;
Voltage short-circuit protection sampling module, by after voltage signal dividing potential drop, is sampled by AD, is delivered to control module.Whether decline for detecting voltage, thus judge current return whether short circuit or power abnormal.
9. as claimed in claim 1 a kind of for fault acquiring terminal detect protective device, it is characterized in that, described current open protection sampling module is made up of multipath high-speed AD sampling A/D chip and current transformer, completes and carries out sampling detection to the input current of failed terminals;
Current open protection sampling module, by the output signal of current transformer, is sampled by AD, is delivered to control module, whether have electric current, thus judge whether current return opens a way for detecting current return.
10., for a method of work for the protective device of fault acquiring terminal detection, it is characterized in that, comprise the following steps:
When being energized to failed terminals for the first time, by control module control voltage short-circuit protection sampling module read failure terminal input voltage amplitude, whether failure judgement terminal voltage loop is normal, if failed terminals input voltage terminal shortcircuit, then electrical source exchange module is by disconnected end input voltage; When failed terminals Input voltage terminal working properly and without short trouble after, the power-frequency voltage signal of power supply, by electrical source exchange module bypass isolating transformer, makes the input voltage of failed terminals directly be accessed by three-phase standard source external power source;
Electrical source exchange module is also connected with the current input terminal of failed terminals; if the current input terminal of failed terminals breaks down; then control module will get the abnormal signal of current protection sampling module output; export control signal simultaneously, disengagement failure terminal input current will be disconnected fast by electrical source exchange module.
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| CN201510520573.1A CN105137264B (en) | 2015-08-21 | 2015-08-21 | A kind of protection device and method for fault acquiring terminal detection |
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| CN201510520573.1A CN105137264B (en) | 2015-08-21 | 2015-08-21 | A kind of protection device and method for fault acquiring terminal detection |
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| CN105137264B CN105137264B (en) | 2018-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108155632A (en) * | 2017-12-27 | 2018-06-12 | 中国船舶重工集团公司第七0三研究所 | A kind of DC power supply loop short circuit isolation module |
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Address after: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee before: State Grid Corporation of China |
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Effective date of registration: 20210331 Address after: No. 150, Jinger Road, Daguanyuan, Shizhong District, Jinan City, Shandong Province Patentee after: Shandong Electric Power Marketing Center Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee before: STATE GRID CORPORATION OF CHINA |