CN105301364A - Power supply plant grounding resistance measuring device and control method - Google Patents
Power supply plant grounding resistance measuring device and control method Download PDFInfo
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- CN105301364A CN105301364A CN201510771529.8A CN201510771529A CN105301364A CN 105301364 A CN105301364 A CN 105301364A CN 201510771529 A CN201510771529 A CN 201510771529A CN 105301364 A CN105301364 A CN 105301364A
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Abstract
The invention relates to a power supply plant grounding resistance measuring device and a control method. The power supply plant grounding resistance measuring device comprises a power supply part, an embedded touch control PC and a voltage collection part. The power supply part is a chargeable battery (B). The voltage collection part comprises resistors R1, R2 and R3 and a voltage stabilizer. An anode of the chargeable batter is connected with one end of the resistor R1 and a port Vin of the voltage stabilizer. A cathode of the chargeable battery is connected with one end of the resistor R2, a grounding end of the voltage stabilizer and a terminal A2. The other ends of the resistors R1 and R2 are mutually connected and are connected with an I/O port of the embedded touch control PC. A port Vout of the voltage stabilizer is connected with the other I/O port of the embedded touch control PC and one end of the resistor R3. The other end of the resistor R3 is connected with a terminal A and the cathode of the chargeable battery. A grouding end of the embedded touch control PC is connected with the cathode of the chargeable battery. The power supply plant grounding resistance measuring device has the advantages that a specific measurement result can be read because of a digital display function, the measurement result can be accurate to an extreme position, the measurement speed is high, the power supply plant grounding resistance measuring device is chargeable and portable, long-distance measurement can be performed, a measurement result self-checking function is provided, and the measurement is more convenient and rapid.
Description
Technical field
The invention belongs to a kind of electric elements pick-up unit, particularly relate to a kind of electric power supply plant earth resistance metering device and control method.
Background technology
In recent years; some transformer stations of China cause the accident because being struck by lightning; wherein most of reason is defective with ground network ground resistance; grounded screen plays a part working earthing and protective ground, simultaneously the whether qualified personal safety being directly connected to transformer station's property safety and staff of stake resistance of earthed system.Such as, on July 16th, 2003, there is thunderstorm weather in Shuangyashan most area, this Administration of State Bureau of power plant due to stake resistance in earthed system bigger than normal, cause this local point infosystem invaded by thunderbolt, cause computing machine and communication apparatus causes massive losses.
Current most of earth resistance metering device is pointer, carrys out reading numerical values, be accurate to hundredths by the scale division value of dial plate; Internal electric source is provided by built-in hand generator, increases weight of equipment, and extend Measuring Time, the Electromagnetic Wave produced in power generation process can interference measurement results.
Summary of the invention
The present invention provides a kind of and chargeablely to carry for solving in known technology the technical matters that exists, measures convenient, electric power supply plant earth resistance metering device and control method efficiently.
The technical scheme that the present invention takes for electric power supply plant earth resistance metering device for the technical matters existed in solution known technology is: it includes power unit, embedded type touch control PC and voltage acquisition part; Described power unit is rechargeable battery (B); Described voltage acquisition part includes first, second and third resistance (R1, R2, R3), voltage stabilizer (P); The positive pole of described rechargeable battery (B) meets one end of described first resistance (R1) and the port Vin of described voltage stabilizer (P); The negative pole of described rechargeable battery (B) connects one end of described second resistance (R2), the earth terminal of described voltage stabilizer (P) and the second terminal (A2); The other end of described first and second resistance (R1, R2) adjoins one another, and connects with an I/O mouth (AD1) of described embedded type touch control PC; The port Vout of described voltage stabilizer (P) connects another I/O mouth (AD2) of described embedded type touch control PC and one end of described 3rd resistance (R3), another termination the first terminal (A1) of described 3rd resistance (R3) and the negative pole of rechargeable battery (B); The negative pole of the ground connection termination rechargeable battery (B) of described embedded type touch control PC.
The present invention for the technical scheme solving in known technology the technical matters that exists and take for the control method of electric power supply plant earth resistance metering device is: its control flow is as follows:
The first step opens embedded type touch control PC, and after start detection software, detection system current electric quantity, forwards second step to afterwards immediately;
Whether second step detection system electricity is greater than 9 volts; If be greater than 9 volts to the 4th step; ; If be not more than 9V (embedded type touch control PC work minimum voltage be 9V), operation interface is pointed out at once " please immediately charging energy-storing " forwards the 3rd step to;
3rd step is system charging in time, forwards the first step to after charging complete;
When 4th step detects this measurement device required cable resistance RL after enter the 5th step;
If it is bigger than normal i.e. (RL>2 Ω) that the 5th step calculates RL value, enter the 6th step; If RL<=2 is Ω, keep the numerical value of RL, forward the 7th step to;
The 4th step is forwarded to intact after cable is tightened docking by the 6th step again;
Separately, A1, A2 receive on testee and ground connection instrument 7th step cable respectively, detect the resistance RH between A1 and A2, transfer to the 8th step afterwards;
8th step PC calculates R (stake resistance resistance)=RH-RL by inside programming and carries out the 9th step;
If the 9th step R<=4 Ω, forward the tenth step to; If R>4 is Ω, forward the 7th step to;
Tenth step Output rusults, measures and terminates.
The advantage that the present invention has and good effect are: it have digital display function readablely provide bulk measurement result, can be accurate to very much position, measuring speed is fast, chargeable carries, long range measurements can be carried out, measurement result self-checking function, can make measurement convenient, quick like this.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is control flow chart of the present invention.
Embodiment
For content of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
As shown in Figure 1, as the negative pole providing the lithium battery B positive pole left side of power supply to flow to lithium battery B via power supply divider resistance R1, sampling resistor R2 for device, sampling resistor R2 receives at two ends AD1, GND mouth of embedded type touch control PC respectively, using the voltage signal that the collects foundation as the electricity of reflection lithium battery B, its internal processor can calculate the size of the real-time voltage of B according to the program of having write; First via the port one of 7805 voltage stabilizer P (producing DC5V) on the right of the positive pole of lithium battery B, then the port 2 of voltage stabilizer P is connected with the negative pole of lithium battery B.The port 3 of voltage stabilizer P forms stable DC5V with the negative pole of lithium battery B, and so just can provide stable DC5V voltage for experiments of measuring, the port 3 of voltage stabilizer P is via sampling resistor R3 to terminal A1, and terminal A1, A2 are connected with lithium battery B negative pole.Sampling resistor R3 receives at two ends AD2, GND port of embedded type touch control PC respectively, using the voltage signal that the collects foundation as the resistance at reflection terminal A1, A2 two ends, its internal processor can calculate the resistance at terminal A1, A2 two ends according to the program of having write.When formal measurement, terminal A1 and A2 will connect certain length conductor cable respectively to realize long range measurements, and terminal A1 will be connected to measured object, and terminal A2 will be connected to ground connection instrument.
System survey: chargeable lithium cell accesses System of voltage acquisition and embedded type touch control PC respectively as power supply; System of voltage acquisition gathers voltage signal and the data gathered is transmitted to embedded type touch control PC; Embedded type touch control PC, as main control equipment, relies on its internal processor to carry out Treatment Analysis to perform corresponding instruction, with the realization of the reliability service of implement device, function to the data gathered.
As shown in Figure 2, the step of voltage collecting device control flow is as follows;
The first step opens embedded type touch control PC, and after start detection software, detection system current electric quantity, forwards second step to afterwards immediately;
Whether second step detection system electricity is greater than 9 volts; If be greater than 9 volts to the 4th step; ; If be not more than 9V (embedded type touch control PC work minimum voltage be 9V), operation interface is pointed out at once " please immediately charging energy-storing " forwards the 3rd step to;
3rd step is system charging in time, forwards the first step to after charging complete;
When 4th step detects this measurement device required cable resistance RL after enter the 5th step;
If it is bigger than normal i.e. (RL>2 Ω) that the 5th step calculates RL value, enter the 6th step; If RL<=2 is Ω, keep the numerical value of RL, forward the 7th step to;
The 4th step is forwarded to intact after cable is tightened docking by the 6th step again;
Separately, A1, A2 receive on testee and ground connection instrument 7th step cable respectively, detect the resistance RH between A1 and A2, transfer to the 8th step afterwards;
8th step PC calculates R (stake resistance resistance)=RH-RL by inside programming and carries out the 9th step;
If the 9th step R<=4 Ω, forward the tenth step to; If R>4 is Ω, forward the 7th step to;
Tenth step Output rusults, measures and terminates.
Claims (2)
1. an electric power supply plant earth resistance metering device, is characterized in that: it includes power unit, embedded type touch control PC and voltage acquisition part; Described power unit is rechargeable battery (B); Described voltage acquisition part includes first, second and third resistance (R1, R2, R3), voltage stabilizer (P); The positive pole of described rechargeable battery (B) meets one end of described first resistance (R1) and the port Vin of described voltage stabilizer (P); The negative pole of described rechargeable battery (B) connects one end of described second resistance (R2), the earth terminal of described voltage stabilizer (P) and the second terminal (A2); The other end of described first and second resistance (R1, R2) adjoins one another, and connects with an I/O mouth (AD1) of described embedded type touch control PC; The port Vout of described voltage stabilizer (P) connects another I/O mouth (AD2) of described embedded type touch control PC and one end of described 3rd resistance (R3), another termination the first terminal (A1) of described 3rd resistance (R3) and the negative pole of rechargeable battery (B); The negative pole of the ground connection termination rechargeable battery (B) of described embedded type touch control PC.
2. a control method for electric power supply plant earth resistance metering device according to claim 1, is characterized in that: its control flow is as follows:
The first step opens embedded type touch control PC, and after start detection software, detection system current electric quantity, forwards second step to afterwards immediately;
Whether second step detection system electricity is greater than 9 volts; If be greater than 9 volts to the 4th step; ; If be not more than 9V (embedded type touch control PC work minimum voltage be 9V), operation interface is pointed out at once " please immediately charging energy-storing " forwards the 3rd step to;
3rd step is system charging in time, forwards the first step to after charging complete;
When 4th step detects this measurement device required cable resistance RL after enter the 5th step;
If it is bigger than normal i.e. (RL>2 Ω) that the 5th step calculates RL value, enter the 6th step; If RL<=2 is Ω, keep the numerical value of RL, forward the 7th step to;
The 4th step is forwarded to intact after cable is tightened docking by the 6th step again;
Separately, A1, A2 receive on testee and ground connection instrument 7th step cable respectively, detect the resistance RH between A1 and A2, transfer to the 8th step afterwards;
8th step PC calculates R (stake resistance resistance)=RH-RL by inside programming and carries out the 9th step;
If the 9th step R<=4 Ω, forward the tenth step to; If R>4 is Ω, forward the 7th step to;
Tenth step Output rusults, measures and terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510771529.8A CN105301364A (en) | 2015-11-12 | 2015-11-12 | Power supply plant grounding resistance measuring device and control method |
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| CN201510771529.8A CN105301364A (en) | 2015-11-12 | 2015-11-12 | Power supply plant grounding resistance measuring device and control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050073320A1 (en) * | 2003-10-07 | 2005-04-07 | Yazaki Corporation | State detecting method and insulation resistance fall detector |
| CN201397364Y (en) * | 2008-12-09 | 2010-02-03 | 武汉市华天电力自动化有限责任公司 | Double-clamp multi-function grounding resistance test instrument |
| CN201966996U (en) * | 2010-12-28 | 2011-09-07 | 上海华勤通讯技术有限公司 | Mobile phone with voltage and resistance detection functions |
| CN204575747U (en) * | 2015-04-02 | 2015-08-19 | 佛山市柏克新能科技股份有限公司 | Equipment ground impedance self-checking circuit |
| CN205139250U (en) * | 2015-11-12 | 2016-04-06 | 天津市百利电气有限公司 | Power supply ground resistance measuring device of factory |
-
2015
- 2015-11-12 CN CN201510771529.8A patent/CN105301364A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050073320A1 (en) * | 2003-10-07 | 2005-04-07 | Yazaki Corporation | State detecting method and insulation resistance fall detector |
| CN201397364Y (en) * | 2008-12-09 | 2010-02-03 | 武汉市华天电力自动化有限责任公司 | Double-clamp multi-function grounding resistance test instrument |
| CN201966996U (en) * | 2010-12-28 | 2011-09-07 | 上海华勤通讯技术有限公司 | Mobile phone with voltage and resistance detection functions |
| CN204575747U (en) * | 2015-04-02 | 2015-08-19 | 佛山市柏克新能科技股份有限公司 | Equipment ground impedance self-checking circuit |
| CN205139250U (en) * | 2015-11-12 | 2016-04-06 | 天津市百利电气有限公司 | Power supply ground resistance measuring device of factory |
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Inventor after: Fan Qinzan Inventor after: Ma Tiejun Inventor after: Yu Sanxi Inventor after: Chen Hao Inventor after: Li Jinlian Inventor after: Wang Tielian Inventor after: Fan Yahui Inventor after: Yin Guoxiang Inventor after: Chen Jun Inventor after: Lang Dingchuan Inventor after: Xu Lihai Inventor before: Fan Qinzan Inventor before: Chen Hao Inventor before: Li Jinlian Inventor before: Wang Tielian Inventor before: Fan Yahui |
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