CN104880637B - A kind of electric parameter safety monitoring method - Google Patents
A kind of electric parameter safety monitoring method Download PDFInfo
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- CN104880637B CN104880637B CN201510364163.2A CN201510364163A CN104880637B CN 104880637 B CN104880637 B CN 104880637B CN 201510364163 A CN201510364163 A CN 201510364163A CN 104880637 B CN104880637 B CN 104880637B
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Abstract
The invention belongs to electric monitoring and protecting technical field; it is related to a kind of electric parameter safety monitoring method; electrical fire index, electric power quality index, electrical safety index, efficiency damped expoential and electric composite index are analyzed respectively according to the electric parameter of electrical system; the weight ratio that parameter and index are formed by setting defines the parameter or the influence degree and degree of concern of index, and exponential quantity interval is carried out into division represents different safety class；Its monitoring technique is simple, easy to operate, safe to use, Monitoring Data is accurate, and electric parameter is sorted out and arranged, and exponential quantity Dynamic Announce in the form of Visual Chart, and the potential safety hazard to caused by user can be avoided to accident early warning and its analysis of trend.
Description
Technical field：
The invention belongs to electric monitoring and protecting technical field, is related to a kind of electric parameter safety monitoring method, can answer extensively
For power plant, transformer station, distribution, cell, building etc. are supplied in the monitor protective system of distribution in one's power.
Background technology：
At present, electric energy has turned into people and rely the main energy sources of production and development, and with the life of people also close phase
Close, excessive risk is accompanied in the use of electric energy always, is such as got an electric shock, is leaked electricity, electrical fire, although power monitoring and protection, change
The technologies such as power station automation, change distribution monitor are more and more perfect, more and more ripe, but power system inherently one is professional
Very strong field, general staff is by simple parameters of electric power, such as voltage, electric current, it is difficult to analyze system overload it is whether serious,
The quality of power supply how, with the presence or absence of aspects such as dangerous hidden danger, and most domestic monitoring system simply adopts field apparatus at present
The basic electrical quantity collected shows and recorded, not further comprehensive judgement.For electricity provider, operation
For business, user, except firm power parameter, more it is concerned with the security of power system, the quality of electric energy, electric energy and turns
Efficiency, the expense of electric energy, overall performance etc. are changed, and concern face and degree of concern would also vary from, and electricity provider is being protected
The quality and efficiency of electric energy can be mainly paid close attention on the premise of card security of system, and power consumer is before security of system is ensured
The expense of electric energy can mainly be paid close attention to by putting；And as microprocessor and computer, internet develop rapidly, to power monitoring
For electric data amount in its database and species it is more and more huger, even very professional staff also is difficult to make
Analysis and judgement, therefore, it is necessary to these huge parameters of electric power sort out and whole by a kind of electric parameter safety monitoring method
Reason, power state situation is weighed with a kind of more simple and effective index.
The content of the invention：
The shortcomings that it is an object of the invention to overcome prior art to exist, seek design and a kind of electric parameter prison safely is provided
Survey method, is sorted out and is arranged to electric parameter, avoids potential safety hazard.
To achieve these goals, the electric parameter of the invention according to electrical system is respectively to electrical fire index, electric energy
Qualitative index, electrical safety index, efficiency damped expoential and electric composite index are analyzed, by setting composition parameter and referring to
Several weight ratios defines the parameter or the influence degree and degree of concern of index, and exponential quantity interval is carried out into division represents not
Same safe class；Its detailed process is：
(1), electrical fire index, electric power quality index, electrical safety index, efficiency are decayed respectively using existing equipment
Each composition parameter of index and electric composite index measures, while to each composition parameter setting higher limit；
(2), judge whether each composition parameter value of measurement exceedes higher limit, if measured value directly judges more than higher limit
For the state of emergency, continue to measure each composition parameter after making emergent management；
(3), when it is each composition parameter be not above higher limit when, calculate respectively it is each composition parameter degree of membership and
Property value, the property values of all composition parameters of each index is added and draws corresponding exponential quantity, then by exponential quantity 0~
It is divided into four kinds of normal condition, attention state, inspection state and precarious position safe classes in the range of 100%；
(4), judge whether to be higher than normal value according to obtained exponential quantity, if exponential quantity is higher than normal value, judge electric power
Whether attention state, inspection state or precarious position are in, are such as in attention state, inspection state or precarious position, then show
The state of electrical system, staff is reminded to be handled accordingly, after being disposed, by exponential quantity in the form of Visual Chart
Dynamic Announce is in external display device, and return to step (1) continues to monitor to electric parameter again, realizes electric parameter
Safety monitoring.
The possibility degree of electrical fire, the higher table of electrical fire index occur for electrical fire index reflection of the present invention
Show that the possibility that electrical fire occurs is higher, the composition parameter of electrical fire index includes leakage current, loose contact situation, insulation
Temperature, overvoltage and phase shortage etc..
The quality and quality of electric power quality index reflection electric energy of the present invention, electric power quality index is higher to represent electric energy product
Matter is higher, and the composition parameter of electric power quality index includes voltage, electric current, power factor, cycle, three-phase imbalance and THD (always
Percent harmonic distortion) etc..
The security performance of electrical safety index reflection electrical system of the present invention, the higher electrical system of electrical safety index
Security it is higher, the composition parameter of electrical safety index includes overvoltage, overcurrent, leakage current, insulating resistance value, power and opened
Close pipe temperature, insulation temperature and transformer temperature climbing etc..
The efficiency attenuation degree of efficiency damped expoential reflection electrical system of the present invention, the higher expression of efficiency damped expoential
The efficiency decay of electrical system is smaller, and the composition parameter of efficiency damped expoential includes higher harmonic content, ambient temperature and humidity, three-phase
Degree of unbalancedness, the capacitance loss ratio of equipment and power device temperature etc..
The combination property of electrically composite index reflection electrical system of the present invention, electric composite index is higher to represent electric
The combination property of system is better, and the composition parameter of electric composite index includes electrical fire index, electrically electric power quality index, peace
Total index number and efficiency damped expoential.
Electrical fire index of the present invention, electric power quality index, electrical safety index, efficiency damped expoential and electrically comprehensive
The composition parameter of hop index, which is respectively provided with, belongs to respective fuzzy membership functions and weight ratio, with the product table of degree of membership and weight ratio
Show the property value of this composition parameter, each parameter that forms is because property difference has different membership functions, according to composition parameter pair
The influence size of electrical system increases or reduced the weight ratio for forming parameter, and the safe class of exponential quantity is divided according to being actually needed
For different brackets and different segments.
Compared with prior art, it is monitored, and technique is simple, and easy to operate, safe to use, Monitoring Data is accurate, right by the present invention
Electric parameter is sorted out and arranged, and exponential quantity Dynamic Announce in the form of Visual Chart, and can to accident early warning and
Its analysis of trend, avoid the potential safety hazard to caused by user.
Brief description of the drawings：
Fig. 1 is the composition structural schematic block diagram of five kinds of indexes of the present invention.
Fig. 2 is hardware composition frame chart used in the embodiment of the present invention.
Fig. 3 is the technological process schematic block diagram of the present invention.
Embodiment：
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment：
The present embodiment carries out safety monitoring using the hardware that Fig. 2 is provided to electric parameter, and its detailed process is：
(1) magnitude of voltage, is measured by multifunctional electric meter and measures the contact at each position not with each phase current values, degree logging
Good situation, return by transformer microcomputer protection measurement device temperature of oil in transformer or insulation temperature, by leak detector measurement is each
The leakage current value on road, to each composition parameter setting higher limit, directly it is determined as the state of emergency more than higher limit, makes loop jump
The stringent effort such as lock, the degree of membership and attribute of each composition parameter are calculated when each composition parameter is not above higher limit
Value, finally all property values for forming parameter, which are added, draws occurrence index value, to handle each allowed band for forming parameter not
Certainty, using FUZZY ALGORITHMS FOR CONTROL to fuzzy membership functions, the structure of electrical fire index corresponding to each composition parameter setting
S π membership functions are used uniformly into parameter, desired subjection degree is set by regulation coefficient；The fuzzy membership functions of use is public
Formula：
In formula, a is fuzzy field interval limit value；B is fuzzy field section higher limit, and λ is the slope of curve, and v is knee of curve；
The final expression formula of electrical fire index is：
In formula, ωiFor the weight ratio of i-th of parameter, μi(x) it is the degree of membership desired value of i-th of parameter, xiFor i-th of ginseng
Several input values；The coefficient value of each composition parameter of electrical fire index is as shown in table 1；
Table 1：Electrical fire index respectively forms the coefficient selection of parameter
(2) voltage, electric current, power factor, cycle, three-phase imbalance, THD etc., are measured by multifunctional electric meter, it is right
It is each to form parameter setting higher limit, just directly it is determined as the state of emergency more than higher limit, corresponding stringent effort is made, when each
Form degree of membership and property value that parameter is not above calculating each composition parameter during higher limit, finally all parameters that form
Property value is added and draws electric power quality exponential quantity；To handle the uncertainty of each allowed band for forming parameter, using Fuzzy Control
Algorithm processed, it is some due in the composition parameter of electric power quality index to fuzzy membership functions corresponding to each composition parameter setting
Forming parameter needs compared with its nominal parameter, such as voltage, electric current, power factor, cycle, now, the parameter
Fuzzy membership functions use formula：
In formula, xdFor rated value；δ is floating maximum.It is other to use formula (2-2)
In formula, a is fuzzy field interval limit value；B is section higher limit；λ is the slope of curve；V is knee of curve；Electric energy product
The final expression formula of matter index is：
In formula, ωiFor the weight ratio of i-th of parameter, μi(x) it is the degree of membership desired value of i-th of parameter, xiFor i-th of ginseng
Several input values；The coefficient value of each composition parameter of electric power quality index is as shown in table 2；
Table 2：The coefficient selection of each parameter of electric power quality index
(3) overvoltage, over current value, are measured by multifunctional electric meter, each position is measured by insulated on-line monitoring instrument
Insulating resistance value, the temperature of each position or device is measured by temperature polling instrument, the electric leakage in each loop is measured by leak detector
Flow valuve, to each composition parameter setting higher limit, just directly it is determined as the state of emergency more than higher limit, makes and accordingly promptly arranging
Apply, the degree of membership and property value of each composition parameter are calculated when each composition parameter is not above higher limit, is finally owned
The property value addition for forming parameter draws electrical safety exponential quantity；To handle the uncertainty of the allowed band of each parameter, use
FUZZY ALGORITHMS FOR CONTROL, to fuzzy membership functions corresponding to each parameter setting, electrical safety index constituent parameters are used uniformly S types
Membership function, can set desired subjection degree by regulation coefficient, and S π membership functions use formula：
In formula, a is fuzzy field interval limit value；B is section higher limit；λ is the slope of curve；V is knee of curve, electrically peace
The final expression formula of total index number is：
In formula, ωiFor the weight ratio of i-th of parameter, μi(x) it is the degree of membership desired value of i-th of parameter, xiFor i-th of ginseng
Several input values, the coefficient value of each composition parameter are as shown in table 3；
Table 3：The coefficient selection of each parameter of electrical safety index
(4) parameters such as higher harmonic content, three-phase imbalance, power, are measured by multifunctional electric meter, by humiture control
Ambient temperature and humidity in device measurement cabinet processed, the temperature of each position or device is measured by temperature polling instrument, by transformer microcomputer protection
Measurement device transformer temperature and power, to each composition parameter setting higher limit, just directly it is determined as more than higher limit urgent
State, corresponding stringent effort are made, being subordinate to for each composition parameter is calculated when each composition parameter is not above higher limit
Degree and property value, finally all property values for forming parameter, which are added, draws efficiency damped expoential value；To handle each composition parameter
The uncertainty of allowed band, using FUZZY ALGORITHMS FOR CONTROL to fuzzy membership functions, efficiency corresponding to each composition parameter setting
The composition parameter of damped expoential is used uniformly S π membership functions, sets desired subjection degree by regulation coefficient, S types are subordinate to
Function uses formula：
In formula, a is fuzzy field interval limit value；B is section higher limit；λ is the slope of curve；V is knee of curve；Efficiency declines
The final expression formula for subtracting index is：
In formula, ωiFor the weight ratio of i-th of parameter, μi(x) it is the degree of membership desired value of i-th of parameter, xiFor i-th of ginseng
Several input values；The coefficient value of each composition parameter is as shown in table 4；
Table 4：The coefficient selection of each parameter of efficiency damped expoential
(5), electric composite index is based on electrical fire index, electric power quality index, electrical safety index, efficiency decay
The Comprehensive Assessment to electric property of index, also to each composition parameter setting higher limit, just directly it is determined as more than higher limit
The state of emergency, corresponding stringent effort are made, it is multiplied by weight ratio when each composition parameter is not above higher limit and immediately arrives at this
The property value of parameter, finally all property values for forming parameter, which are added, draws electric composite index value：
S=ω1(1-μ1)+ω2μ2+ω3μ3+ω4(1-μ4) (5-1)
In formula, ω1~ω4For electrical fire index, electric power quality index, electrical safety index, efficiency damped expoential power
Compare again, μ1~μ4For electrical fire index, electric power quality index, electrical safety index, efficiency damped expoential exponential quantity；Each ginseng
Several coefficient values is as shown in table 5.
Table 5：The coefficient selection of each procedure parameter of electric composite index
Claims (7)
1. a kind of electric parameter safety monitoring method, it is characterised in that refer to respectively to electrical fire according to the electric parameter of electrical system
Number, electric power quality index, electrical safety index, efficiency damped expoential and electric composite index are analyzed, and are formed by setting
Parameter and the weight ratio of index define the parameter or the influence degree and degree of concern of index, and exponential quantity interval is drawn
Divide and represent different safety class；Its detailed process is：
(1), using existing equipment respectively to electrical fire index, electric power quality index, electrical safety index, efficiency damped expoential
Measured with each composition parameter of electric composite index, while to each composition parameter setting higher limit；
(2), judge whether each composition parameter value of measurement exceedes higher limit, if measured value is directly determined as tightly more than higher limit
Anxious state, continue to measure each composition parameter after making emergent management；
(3), when each composition parameter is not above higher limit, the degree of membership and attribute of each composition parameter are calculated respectively
Value, the property value of all composition parameters of each index is added and draws corresponding exponential quantity, then by exponential quantity 0~100%
In the range of be divided into four kinds of normal condition, attention state, inspection state and precarious position safe classes；
(4), according to obtained exponential quantity judge whether to be higher than normal value, if exponential quantity is higher than normal value, whether judge electric power
In attention state, inspection state or precarious position, attention state, inspection state or precarious position such as are in, then display is electric
The state of system, remind staff handled accordingly, after being disposed, by exponential quantity in the form of Visual Chart dynamically
It is shown in external display device, and return to step (1) continues to monitor to electric parameter again, realizes the safety of electric parameter
Monitoring.
2. electric parameter safety monitoring method according to claim 1, it is characterised in that the electrical fire index reflection hair
The possibility degree of raw electrical fire, electrical fire index is higher to represent that the possibility that electrical fire occurs is higher, electrical fire
The composition parameter of index includes leakage current, loose contact situation, insulation temperature, overvoltage and phase shortage.
3. electric parameter safety monitoring method according to claim 1, it is characterised in that the electric power quality index reflection electricity
The quality and quality of energy, electric power quality index is higher to represent that electric power quality is higher, and the composition parameter of electric power quality index includes electricity
Pressure, electric current, power factor, cycle, three-phase imbalance and and total harmonic distortion factor.
4. electric parameter safety monitoring method according to claim 1, it is characterised in that the electrical safety index reflection electricity
The security performance of gas system, the security of the higher electrical system of electrical safety index is higher, the composition parameter of electrical safety index
Rise including overvoltage, overcurrent, leakage current, insulating resistance value, power switch pipe temperature, insulation temperature and transformer temperature
Rate.
5. electric parameter safety monitoring method according to claim 1, it is characterised in that the efficiency damped expoential is anti-
The efficiency attenuation degree of electrical system is reflected, the efficiency decay of the higher expression electrical system of efficiency damped expoential is smaller, efficiency decay
The composition parameter of index includes higher harmonic content, ambient temperature and humidity, tri-phase unbalance factor, the capacitance loss ratio and power of equipment
Device temperature.
6. electric parameter safety monitoring method according to claim 1, it is characterised in that the electrically composite index reflection electricity
The combination property of gas system, the combination property of the electric higher expression electrical system of composite index is better, the structure of electric composite index
Include electrical fire index, electric power quality index, electrical safety index and efficiency damped expoential into parameter.
7. electric parameter safety monitoring method according to claim 1, it is characterised in that the electrical fire index, electric energy product
Matter index, electrical safety index, the composition parameter of efficiency damped expoential and electric composite index, which are respectively provided with, belongs to respective fuzzy
Membership function and weight ratio, with the property value of degree of membership and product representation this composition parameter of weight ratio, it is each form parameter because
Property difference has different membership functions, and composition parameter is increased or reduce according to influence size of the parameter to electrical system is formed
Weight ratio, the safe class of exponential quantity is divided into different brackets and different segments according to being actually needed.
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| CN108062718B (en) * | 2016-11-08 | 2021-05-07 | 中芯国际集成电路制造(上海)有限公司 | Processing method and processing system for semiconductor manufacturing information |
| CN107390099A (en) * | 2017-08-02 | 2017-11-24 | 青岛海能电气有限公司 | A kind of EMUs high voltage equipment insulation state on_line monitoring system |
| CN112630552B (en) * | 2020-12-16 | 2021-08-31 | 国家电网有限公司华东分部 | Method for determining unbalance degree of bus electric quantity |
| CN113777423B (en) * | 2021-08-19 | 2023-08-15 | 武汉铁路职业技术学院 | Test system based on electric automation equipment |
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Effective date of registration: 20180302 Address after: 266100 No. nine, No. 8 East water road, Licang District, Shandong, Qingdao province 320 Co-patentee after: Qingdao Hai Neng Electric Applicance Co., Ltd Patentee after: QINGDAO HAINENG ALPINE RAIL POWER EQUIPMENT ENGINEERING TECHNOLOGY CO., LTD. Address before: Zhuzhou Road, Laoshan District 266100 in Shandong city of Qingdao province No. 151 high tech park, 1 No. 3 building 307 room Patentee before: QINGDAO HAINENG ALPINE RAIL POWER EQUIPMENT ENGINEERING TECHNOLOGY CO., LTD. |