CN118038653A - Electric shock prevention method and system for power grid construction operation - Google Patents
Electric shock prevention method and system for power grid construction operation Download PDFInfo
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Abstract
The invention belongs to the technical field of power grid construction supervision, and particularly relates to an electric shock prevention method and system for power grid construction operation, wherein the electric shock prevention system comprises a server, an operation area layout module, an electric power monitoring module, an intelligent protection module, a protection monitoring evaluation module and an operation early warning module; according to the invention, the current and voltage conditions of all key positions are monitored in real time through the power monitoring module, the electric shock high hidden danger signal or the electric shock low hidden danger signal is generated through analysis, the intelligent protection module automatically starts protection measures when the electric shock high hidden danger signal is generated, effective monitoring of a power grid construction operation area is realized, the safety and the construction stability of operators are ensured, the protection efficiency of power grid construction operation in a protection period is detected and analyzed through the protection monitoring evaluation module, and the operation early warning module sends out corresponding early warning when the protection risk signal is generated, so that corresponding investigation and improvement are carried out in time, and the subsequent safety protection performance is ensured.
Description
Technical Field
The invention relates to the technical field of power grid construction supervision, in particular to an electric shock prevention method and system for power grid construction operation.
Background
The power grid construction operation specifically refers to a series of engineering construction activities such as installation, debugging, overhaul, maintenance, transformation or extension of power grid equipment, lines and facilities in a power system, and the operations generally relate to high-voltage, ultra-high-voltage or ultra-high-voltage power grid equipment, including transmission lines, substations, switchyard, power distribution facilities and the like;
in the power grid construction operation, because the operation environment is complex, the equipment is various, the operation difficulty is high, electric shock accidents are frequent, the life safety of operators is seriously threatened, the existing electric shock prevention measures often depend on personal protection equipment of the operators and safety management of the site, the active prevention and real-time monitoring capability is lacked, the electric shock supervision difficulty is high, the intelligent degree is low, and the safety of the operators and the power grid construction operation stability are not guaranteed;
in view of the above technical drawbacks, a solution is now proposed.
Disclosure of Invention
The invention aims to provide an electric shock prevention method and system for power grid construction operation, which solve the problems that the prior art lacks active prevention and real-time monitoring capability, is unfavorable for ensuring the safety of operators and the stability of power grid construction operation, and has high electric shock supervision difficulty and low intelligent degree.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An electric shock prevention system for power grid construction operation comprises a server, an operation area layout module, an electric power monitoring module, an intelligent protection module, a protection monitoring evaluation module and an operation early warning module; the operation area layout module obtains a power grid construction operation area, determines the key position of the power grid construction operation area according to the characteristics and potential risk points of power grid construction, marks the corresponding key position as i, and the i is a natural number larger than 1;
The power monitoring module is used for distributing high-precision current transformers and voltage transformers at all key positions, monitoring current and voltage conditions of the key position i in real time, determining a safety position and an electric shock risk position through analysis, generating an electric shock high hidden danger signal if the electric shock risk position exists in a power grid operation area, generating an electric shock low hidden danger signal if the electric shock risk position does not exist in the power grid operation area, and sending the electric shock high hidden danger signal to the operation early warning module and the intelligent protection module through the server;
The operation early warning module sends out corresponding early warning when receiving the electric shock high hidden danger signal, and the intelligent protection module automatically starts protection measures when receiving the electric shock high hidden danger signal, including cutting off a power supply and starting an insulating barrier, so as to prevent electric shock accidents; the protection monitoring evaluation module is used for setting a protection period, detecting and analyzing the protection efficiency of the power grid construction operation in the protection period, generating a protection normal signal or a protection risk signal through analysis, sending the protection risk signal to the operation early-warning module through the server, and sending a corresponding early warning when the operation early-warning module receives the protection risk signal.
Further, the specific operation process of the power monitoring module includes:
Acquiring a real-time current value and a current instantaneous increasing amplitude of a key position i, respectively carrying out numerical comparison on the real-time current value and the current instantaneous increasing amplitude and a corresponding preset real-time current threshold value and a preset current instantaneous increasing amplitude threshold value, and marking the key position i as an electric shock risk position if the real-time current value or the current instantaneous increasing amplitude exceeds the corresponding preset threshold value;
if the real-time current value and the current instantaneous increasing amplitude do not exceed the corresponding preset thresholds, acquiring a voltage fluctuation range value and a voltage instantaneous changing amplitude of the key position i, respectively comparing the voltage fluctuation range value and the voltage instantaneous changing amplitude with the preset voltage fluctuation range threshold and the preset voltage instantaneous changing amplitude threshold in numerical values, and if the voltage fluctuation range value or the voltage instantaneous changing amplitude exceeds the corresponding preset thresholds, marking the key position i as an electric shock risk position; and if the voltage fluctuation range value and the voltage instantaneous change amplitude do not exceed the corresponding preset threshold values, marking the key position i as a safety position.
Further, the specific operation process of the protection monitoring and evaluating module comprises the following steps:
Acquiring the time when the intelligent protection module receives the corresponding electric shock potential signals and marking the time as electric shock alarm time, acquiring the time when the intelligent protection module starts to start corresponding protection measures and marking the time as protection triggering time, and calculating the time difference between the protection triggering time and the corresponding electric shock alarm time to obtain a protection effective detection value;
Collecting all the protection effect detection values in the protection period, carrying out mean value calculation and variance calculation on all the protection effect detection values to obtain protection effect measurement values and protection effect condition values, respectively carrying out numerical comparison on the protection effect measurement values and the protection effect condition values with a preset protection effect measurement threshold value and a preset protection effect condition threshold value, and generating a protection risk signal if the protection effect measurement values exceed the preset protection effect measurement threshold value and the protection effect condition values do not exceed the preset protection effect condition threshold value; if the protection effect measured value does not exceed the preset protection effect measured threshold value and the protection effect condition value does not exceed the preset protection effect condition threshold value, generating a protection normal signal; and carrying out protection precision evaluation analysis on the other conditions.
Further, the specific analysis process of the protection precision evaluation analysis is as follows:
The protection effect detection value is compared with a preset protection effect detection threshold value in a numerical mode, and if the protection effect detection value exceeds the preset protection effect detection threshold value, the corresponding protection effect detection value is marked as a protection abnormal detection value; obtaining the number of the protection abnormal detection values in the protection period, carrying out ratio calculation on the number of the protection abnormal detection values and the number of the protection effective detection values to obtain protection abnormal occupation values, carrying out numerical calculation on the protection abnormal occupation values and the protection effective detection values to obtain protection evaluation values, carrying out numerical comparison on the protection evaluation values and a preset protection evaluation threshold value, and generating a protection risk signal if the protection evaluation values exceed the preset protection evaluation threshold value; and if the protection evaluation value does not exceed the preset protection evaluation threshold value, generating a protection normal signal.
Further, the server is in communication connection with the position risk decision analysis module, the position risk decision analysis module is used for setting a decision period, acquiring the times of marking the key position i as an electric shock risk position in the decision period, defining the times as an electric shock risk frequency value, comparing the electric shock risk frequency value with a preset electric shock risk frequency threshold value in a numerical mode, and marking the key position i as a high risk position if the electric shock risk frequency value exceeds the preset electric shock risk frequency threshold value; if the electric risk frequency value does not exceed the preset electric risk frequency threshold value, marking the key position i as a low risk position, and sending the high risk position and the low risk position to a server for storage.
Further, the server is in communication connection with the operation matching abnormality judgment module, the server sends the high-risk position to the operation matching abnormality judgment module, after the operation matching abnormality judgment module obtains the high-risk position, the operation personnel at the high-risk position are analyzed, the operation matching performance of the corresponding operation personnel and the corresponding high-risk position is judged, a non-matching signal or a matching signal is generated, the non-matching signal is sent to the operation early warning module through the server, and the operation early warning module sends corresponding early warning when receiving the non-matching signal.
Further, the specific operation process of the job matching abnormality judgment module is as follows:
Collecting the total duration of the power grid construction operation performed by the corresponding operator in the history stage, marking the total duration as a power grid operation time value, collecting the times of incorrect operation of the operator in the power grid construction operation process in the history stage, marking the times as power grid operation frequency value, collecting the end time of the power grid construction operation performed by the operator adjacent to the last time, calculating the time difference between the current time and the end time of the power grid construction operation performed adjacent to the last time to obtain a power grid operation time interval value, calculating the power grid operation time value, the power grid operation frequency value and the power grid operation time interval value to obtain a power grid operation analysis value, comparing the power grid operation analysis value with a preset power grid operation analysis threshold value, and generating a matching signal of the corresponding operator if the power grid operation analysis value exceeds the preset power grid operation analysis threshold value; and if the power grid operation analysis value does not exceed the preset power grid operation analysis threshold value, generating a non-matching signal of corresponding operators.
Further, the server is in communication connection with the operation area alarm grading module, and the operation area alarm grading module is used for detecting and analyzing the alarm grade of the power grid construction operation area, marking the power grid construction operation area as a primary alarm area, a secondary alarm area or a tertiary alarm area through analysis, and sending grading information of the power grid construction operation area to the operation early warning module through the server.
Further, the specific analysis procedure of the alarm level detection analysis is as follows:
Acquiring the number of high-risk positions in a power grid construction operation area, marking the ratio of the number of the high-risk positions to the total number of key positions as a high-risk position occupation value, carrying out summation calculation on electric shock risk frequency values of all the key positions in a decision period, taking an average value to obtain an electric shock risk condition value, carrying out numerical calculation on the high-risk position occupation value and the electric shock risk condition value to obtain an alarm grade evaluation value, carrying out numerical comparison on the alarm grade evaluation value and a preset alarm grade evaluation value range, and marking the power grid construction operation area as a first-level alarm area if the alarm grade evaluation value exceeds the maximum value of the preset alarm grade evaluation value range; if the alarm level evaluation value does not exceed the minimum value of the preset alarm level evaluation value range, marking the power grid construction operation area as a three-level alarm area; and if the alarm level evaluation value is within the preset alarm level evaluation value range, marking the power grid construction operation area as a secondary alarm area.
Furthermore, the invention also provides an electric shock prevention method for power grid construction operation, which comprises the following steps:
Step one, an operation area layout module acquires a power grid construction operation area, and determines the key position of the power grid construction operation area according to the characteristics and potential risk points of power grid construction;
the power monitoring module monitors current and voltage conditions of all key positions in real time, determines a safety position and an electric shock risk position through analysis, and generates an electric shock high hidden danger signal or an electric shock low hidden danger signal;
Step three, when an electric shock high hidden trouble signal is generated, the intelligent protection module automatically starts protection measures;
And fourthly, detecting and analyzing the protection effect of the power grid construction operation in the protection period by the protection monitoring and evaluating module, generating a protection normal signal or a protection risk signal by analysis, and enabling the operation early warning module to send out corresponding early warning when the protection risk signal is generated.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the current and voltage conditions of all key positions are monitored in real time through the power monitoring module, the electric shock high hidden danger signal or the electric shock low hidden danger signal is generated through analysis, the intelligent protection module automatically starts protection measures when the electric shock high hidden danger signal is generated, effective monitoring of a power grid construction operation area is realized, the safety and the construction stability of operators are ensured, the protection efficiency of power grid construction operation in a protection period is detected and analyzed through the protection monitoring evaluation module, and the operation early warning module sends corresponding early warning when a protection risk signal is generated, so that the subsequent safety protection performance is ensured;
2. According to the invention, the position risk decision analysis module is used for analyzing to determine the position of high risk so as to take adaptive reasonable measures when working is carried out on different positions, the working management difficulty is reduced, the working safety is improved, the working personnel at the position of high risk are analyzed through the working matching abnormality judgment module, the working matching performance of the corresponding working personnel and the corresponding position of high risk is judged, the manager is reminded of timely replacing the working personnel at the corresponding position of high risk when a non-matching signal is generated, so that the working safety of the corresponding position of high risk is further ensured, and the warning grade detection analysis is carried out on the power grid construction working area through the working area warning grade classification module, thereby being beneficial to planning a management scheme, further ensuring the working safety of power grid construction and having high intelligent degree.
Drawings
For the convenience of those skilled in the art, the present invention will be further described with reference to the accompanying drawings;
FIG. 1 is a system block diagram of a first embodiment of the present invention;
FIG. 2 is a system block diagram of a second and third embodiment of the present invention;
Fig. 3 is a flow chart of a method according to a fourth embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: as shown in FIG. 1, the electric shock prevention system for power grid construction operation provided by the invention comprises a server, an operation area layout module, an electric power monitoring module, an intelligent protection module, a protection monitoring evaluation module and an operation early warning module; the operation area layout module obtains a power grid construction operation area, determines the key position of the power grid construction operation area according to the characteristics and potential risk points of power grid construction, marks the corresponding key position as i, and the i is a natural number larger than 1;
It should be noted that, the key positions include access points and branch points of the power grid line, and because the points are areas with concentrated current and voltage changes, abnormal conditions are easy to occur, the corresponding monitoring sensors can be arranged to sense and record the current and voltage changes in real time, and potential electric shock risks can be found in time;
Secondly, the key position also comprises key equipment and key nodes in the power grid construction operation area; the normal operation of key equipment such as transformers, switch cabinets, circuit breakers and the like is critical to the whole power grid system, and the corresponding monitoring sensors are arranged on the equipment, so that the operation state of the equipment can be monitored in real time, the equipment faults or abnormal conditions can be found in time, and electric shock accidents are avoided;
In addition, the key positions also comprise conductive parts and metal structures which are possibly contacted by construction operators, the positions possibly have the risks of electric leakage or contact voltage, the safety of the operators is threatened, the change of current and voltage can be monitored in real time by arranging corresponding monitoring sensors at the positions, and once abnormal conditions are found, early warning and protective measures are timely taken, so that the safety of the operators is protected.
The power monitoring module is used for distributing high-precision current transformers and voltage transformers at all key positions, monitoring current and voltage conditions of the key position i in real time, determining a safety position and an electric shock risk position through analysis, generating an electric shock high hidden danger signal if the electric shock risk position exists in a power grid operation area, generating an electric shock low hidden danger signal if the electric shock risk position does not exist in the power grid operation area, and sending the electric shock high hidden danger signal to the operation early warning module and the intelligent protection module through the server, so that the effective monitoring of the power grid construction operation area is realized, the early warning of the electric shock risk condition can be fed back in time, and the safety and the construction stability of operators are ensured; the specific operation process of the power monitoring module is as follows:
Acquiring a real-time current value and a current instantaneous increasing amplitude of a key position i, respectively carrying out numerical comparison on the real-time current value and the current instantaneous increasing amplitude and a corresponding preset real-time current threshold value and a preset current instantaneous increasing amplitude threshold value, and marking the key position i as an electric shock risk position if the real-time current value or the current instantaneous increasing amplitude exceeds the corresponding preset threshold value;
if the real-time current value and the current instantaneous increasing amplitude do not exceed the corresponding preset thresholds, acquiring a voltage fluctuation range value and a voltage instantaneous changing amplitude of the key position i, respectively comparing the voltage fluctuation range value and the voltage instantaneous changing amplitude with the preset voltage fluctuation range threshold and the preset voltage instantaneous changing amplitude threshold in numerical values, and if the voltage fluctuation range value or the voltage instantaneous changing amplitude exceeds the corresponding preset thresholds, marking the key position i as an electric shock risk position; and if the voltage fluctuation range value and the voltage instantaneous change amplitude do not exceed the corresponding preset threshold values, marking the key position i as a safety position.
The operation early warning module sends out corresponding early warning when receiving the electric shock high hidden danger signal, and the intelligent protection module automatically starts protection measures when receiving the electric shock high hidden danger signal, including cutting off a power supply, starting an insulating barrier and the like, so as to prevent electric shock accidents, have high intelligent degree and obvious safety protection performance of power grid operation; the protection monitoring evaluation module is used for setting a protection period, and the protection period is preferably three hours; detecting and analyzing the protection efficiency of the power grid construction operation in the protection period, generating a protection normal signal or a protection risk signal through analysis, sending the protection risk signal to an operation early warning module through a server, sending a corresponding early warning when the operation early warning module receives the protection risk signal, reasonably analyzing and accurately feeding back the protection efficiency of the intelligent protection module, so as to timely perform corresponding investigation and improvement, and ensuring the subsequent safety protection performance; the specific operation process of the protection monitoring and evaluating module is as follows:
Acquiring the time when the intelligent protection module receives the corresponding electric shock potential signals and marking the time as electric shock alarm time, acquiring the time when the intelligent protection module starts to start corresponding protection measures and marking the time as protection triggering time, and calculating the time difference between the protection triggering time and the corresponding electric shock alarm time to obtain a protection effective detection value; the larger the numerical value of the protection effective detection value is, the slower the response of the corresponding protection process is; collecting all the protection effect detection values in the protection period, and carrying out mean value calculation and variance calculation on all the protection effect detection values to obtain protection effect detection values and protection effect condition values;
Respectively comparing the protection effect measured value and the protection effect condition value with a preset protection effect measured threshold value and a preset protection effect condition threshold value, and generating a protection risk signal if the protection effect measured value exceeds the preset protection effect measured threshold value and the protection effect condition value does not exceed the preset protection effect Kuang Yuzhi, which indicates that the protection efficiency in the protection period is poor in the comprehensive aspect; if the protection effect measured value does not exceed the preset protection effect measured threshold value and the protection effect condition value does not exceed the preset protection effect Kuang Yuzhi, indicating that the protection efficiency in the protection period is better in the comprehensive aspect, generating a protection normal signal;
And carrying out protection precision evaluation analysis on the other conditions, wherein the protection precision evaluation analysis comprises the following specific steps: the method comprises the steps of comparing a protection effect detection value with a preset protection effect detection threshold value, marking the corresponding protection effect detection value as a protection abnormal detection value if the protection effect detection value exceeds the preset protection effect detection threshold value, obtaining the number of the protection abnormal detection values in a protection period, and calculating the ratio of the number of the protection abnormal detection values to the number of the protection effect detection values to obtain a protection abnormal occupation value;
Performing numerical calculation on the protection differential occupation value FL and the protection effective measurement value FY through a formula FX=a1+a2 x FY/a1 to obtain a protection evaluation value FX, wherein a1 and a2 are preset proportionality coefficients, and a1 is more than a2 is more than 0; moreover, the larger the numerical value of the protection evaluation value FX is, the worse the protection performance of the intelligent protection module in the protection period is indicated; comparing the protection evaluation value FX with a preset protection evaluation threshold value, and generating a protection risk signal if the protection evaluation value FX exceeds the preset protection evaluation threshold value, which indicates that the protection efficiency of the intelligent protection module is poor in the protection period; if the protection evaluation value FX does not exceed the preset protection evaluation threshold, the protection efficiency of the intelligent protection module in the protection period is good, and a protection normal signal is generated.
Embodiment two: as shown in fig. 2, the difference between the present embodiment and embodiment 1 is that the server is communicatively connected to a risk decision analysis module, and the risk decision analysis module is configured to set a decision period, preferably, the decision period is fifteen days; acquiring the number of times that a key position i is marked as an electric shock risk position in a decision period, defining the number of times as an electric shock risk frequency value, comparing the electric shock risk frequency value with a preset electric shock risk frequency threshold value, and marking the key position i as a high risk position if the electric shock risk frequency value exceeds the preset electric shock risk frequency threshold value, which indicates that the electric shock risk of the key position in the decision period is larger; if the electric shock risk frequency value does not exceed the preset electric shock risk frequency threshold value, the fact that the electric shock risk of the key position in the decision period is smaller is indicated, the key position i is marked as a low risk position, and the high risk position and the low risk position are sent to the server for storage, so that appropriate reasonable measures are adopted when the operation is carried out on different positions later, the operation management difficulty is reduced, and the operation safety is improved.
Further, the server is in communication connection with the operation matching abnormality judgment module, the server sends the high-risk position to the operation matching abnormality judgment module, after the operation matching abnormality judgment module obtains the high-risk position, the operation personnel at the high-risk position are analyzed, the operation matching performance of the corresponding operation personnel and the corresponding high-risk position is judged, a non-matching signal or a matching signal is generated, the non-matching signal is sent to the operation early warning module through the server, and the operation early warning module sends corresponding early warning when receiving the non-matching signal so as to remind the manager to timely replace the operation personnel at the corresponding high-risk position, so that the operation safety of the corresponding high-risk position is further ensured; the specific operation process of the operation matching abnormality judging module is as follows:
Collecting the total duration of the power grid construction operation performed by the corresponding operator in the history stage, marking the total duration as a power grid operation time value, collecting the times of incorrect operation of the operator in the power grid construction operation process in the history stage, marking the times as power grid operation frequency value, collecting the end time of the power grid construction operation performed by the operator adjacent to the last time, and calculating the time difference between the current time and the end time of the power grid construction operation performed adjacent to the last time to obtain the power grid operation time interval value;
By the formula Carrying out numerical calculation on a grid operation time-out value GS, a grid operation frequency-staggered value GF and a grid operation time-out value GY to obtain a grid operation analysis value GX, wherein eg1, eg2 and eg3 are preset proportion coefficients, the values of eg1, eg2 and eg3 are positive numbers, and the larger the numerical value of the grid operation analysis value GX is, the more suitable the corresponding operator is for operating the high-risk position; comparing the power grid operation analysis value GX with a preset power grid operation analysis threshold value, and generating a matching signal of the corresponding operator if the power grid operation analysis value GX exceeds the preset power grid operation analysis threshold value, which indicates that the corresponding operator is more suitable for operating the high-risk position; if the power grid operation analysis value GX does not exceed the preset power grid operation analysis threshold value, indicating that the corresponding operator is not suitable for operating the high-risk position, and the operation risk is large, generating a non-matching signal of the corresponding operator.
Embodiment III: as shown in fig. 2, the difference between the present embodiment and embodiments 1 and 2 is that the server is communicatively connected to an operation area alarm level classification module, which is configured to perform alarm level detection analysis on a power grid construction operation area, mark the power grid construction operation area as a primary alarm area, a secondary alarm area or a tertiary alarm area through analysis, and send the level classification information of the power grid construction operation area to an operation early warning module through the server, so that a manager can take different supervision intensities when performing operation of the power grid construction operation area, thereby facilitating management scheme planning and ensuring operation safety of the power grid construction operation; the specific analysis procedure of the alarm level detection analysis is as follows:
Acquiring the number of high-risk positions in a power grid construction operation area, marking the ratio of the number of the high-risk positions to the total number of key positions as a high-risk position occupation value, carrying out summation calculation on electric shock risk frequency values of all the key positions in a decision period, taking an average value to obtain an electric shock risk condition value, and carrying out numerical calculation on the high-risk position occupation value WF and the electric shock risk condition value WS through a formula WX=fy1+fy2 to obtain an alarm grade evaluation value WX, wherein fy1 and fy2 are preset proportion coefficients, and fy1 is more than fy2 is more than 0; and, the greater the value of the alarm level evaluation value WX, the greater the comprehensive operation risk of the power grid construction operation area in the decision period; comparing the alarm level evaluation value WX with a preset alarm level evaluation value range in a numerical mode;
If the alarm level evaluation value WX exceeds the maximum value of the preset alarm level evaluation value range, indicating that the operation risk of the power grid construction operation area is extremely large in the decision period, marking the power grid construction operation area as a primary alarm area; if the alarm level evaluation value WX does not exceed the minimum value of the preset alarm level evaluation value range, indicating that the operation risk synthesis of the power grid construction operation area in the decision period is smaller, marking the power grid construction operation area as a three-level alarm area; and if the alarm level evaluation value WX is in the preset alarm level evaluation value range, indicating that the operation risk of the power grid construction operation area in the decision period is large in combination, marking the power grid construction operation area as a secondary alarm area.
Embodiment four: as shown in fig. 3, the difference between the present embodiment and embodiments 1,2, and 3 is that the electric shock prevention method for the power grid construction operation provided by the present invention includes the following steps:
Step one, an operation area layout module acquires a power grid construction operation area, and determines the key position of the power grid construction operation area according to the characteristics and potential risk points of power grid construction;
the power monitoring module monitors current and voltage conditions of all key positions in real time, determines a safety position and an electric shock risk position through analysis, and generates an electric shock high hidden danger signal or an electric shock low hidden danger signal;
Step three, when an electric shock high hidden trouble signal is generated, the intelligent protection module automatically starts protection measures;
And fourthly, detecting and analyzing the protection effect of the power grid construction operation in the protection period by the protection monitoring and evaluating module, generating a protection normal signal or a protection risk signal by analysis, and enabling the operation early warning module to send out corresponding early warning when the protection risk signal is generated.
The working principle of the invention is as follows: during the use, confirm the key position of electric wire netting construction operation region through operation region layout module according to electric wire netting construction's characteristics and potential risk point, electric power monitoring module carries out real-time supervision to the electric current and the voltage situation of all key positions, through analysis in order to confirm safe position and electric shock risk position, and generate electric shock high hidden danger signal or electric shock low hidden danger signal, make intelligent protection module automatic start safeguard measure when generating electric shock high hidden danger signal, prevent the emergence of electric shock accident, realize the effective monitoring to electric wire netting construction operation region, can in time feedback early warning electric shock risk situation, guarantee the safety and the construction stability of operating personnel, and detect the analysis with the protection effect of electric wire netting construction operation in the guard period through protection monitoring evaluation module, produce protection normal signal or protection risk signal through the analysis, make operation early warning module send corresponding early warning when producing protection risk signal, can carry out reasonable analysis and accurate feedback to intelligent protection module's protection efficiency, so as to in time carry out corresponding investigation and improvement, guarantee subsequent safety protection performance.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas with a large amount of data collected for software simulation to obtain the latest real situation, and preset parameters in the formulas are set by those skilled in the art according to the actual situation. The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The electric shock prevention system for the power grid construction operation is characterized by comprising a server, an operation area layout module, an electric power monitoring module, an intelligent protection module, a protection monitoring evaluation module and an operation early warning module; the operation area layout module obtains a power grid construction operation area, determines the key position of the power grid construction operation area according to the characteristics and potential risk points of power grid construction, marks the corresponding key position as i, and the i is a natural number larger than 1;
The power monitoring module is used for distributing high-precision current transformers and voltage transformers at all key positions, monitoring current and voltage conditions of the key position i in real time, determining a safety position and an electric shock risk position through analysis, generating an electric shock high hidden danger signal if the electric shock risk position exists in a power grid operation area, generating an electric shock low hidden danger signal if the electric shock risk position does not exist in the power grid operation area, and sending the electric shock high hidden danger signal to the operation early warning module and the intelligent protection module through the server;
The operation early warning module sends out corresponding early warning when receiving the electric shock high hidden danger signal, and the intelligent protection module automatically starts protection measures when receiving the electric shock high hidden danger signal, including cutting off a power supply and starting an insulating barrier, so as to prevent electric shock accidents; the protection monitoring evaluation module is used for setting a protection period, detecting and analyzing the protection efficiency of the power grid construction operation in the protection period, generating a protection normal signal or a protection risk signal through analysis, sending the protection risk signal to the operation early-warning module through the server, and sending a corresponding early warning when the operation early-warning module receives the protection risk signal.
2. The electric shock protection system for power grid construction operation according to claim 1, wherein the specific operation process of the power monitoring module comprises:
acquiring a real-time current value and a current instantaneous increasing amplitude of a key position i, and marking the key position i as an electric shock risk position if the real-time current value or the current instantaneous increasing amplitude exceeds a corresponding preset threshold value;
if the real-time current value and the current instantaneous increasing amplitude do not exceed the corresponding preset thresholds, acquiring a voltage fluctuation range value and a voltage instantaneous changing amplitude of the key position i, and if the voltage fluctuation range value or the voltage instantaneous changing amplitude exceeds the corresponding preset thresholds, marking the key position i as an electric shock risk position; and if the voltage fluctuation range value and the voltage instantaneous change amplitude do not exceed the corresponding preset threshold values, marking the key position i as a safety position.
3. The electric shock protection system for power grid construction operation according to claim 2, wherein the specific operation process of the protection monitoring and evaluation module comprises:
Acquiring the time when the intelligent protection module receives the corresponding electric shock potential signals and marking the time as electric shock alarm time, acquiring the time when the intelligent protection module starts to start corresponding protection measures and marking the time as protection triggering time, and calculating the time difference between the protection triggering time and the corresponding electric shock alarm time to obtain a protection effective detection value;
Collecting all the protection effect detection values in the protection period, carrying out mean value calculation and variance calculation on all the protection effect detection values to obtain a protection effect measurement value and a protection effect condition value, and generating a protection risk signal if the protection effect measurement value exceeds a preset protection effect measurement threshold value and the protection effect condition value does not exceed the preset protection effect condition threshold value; if the protection effect measured value does not exceed the preset protection effect measured threshold value and the protection effect condition value does not exceed the preset protection effect condition threshold value, generating a protection normal signal; and carrying out protection precision evaluation analysis on the other conditions.
4. A system for protecting against electric shock during construction of a power grid according to claim 3, wherein the specific analysis procedure of the protection precision evaluation analysis is as follows:
The protection effect detection value is compared with a preset protection effect detection threshold value in a numerical mode, and if the protection effect detection value exceeds the preset protection effect detection threshold value, the corresponding protection effect detection value is marked as a protection abnormal detection value; obtaining the number of the protection abnormal detection values in the protection period, carrying out ratio calculation on the number of the protection abnormal detection values and the number of the protection effective detection values to obtain protection abnormal occupation values, carrying out numerical calculation on the protection abnormal occupation values and the protection effective detection values to obtain protection evaluation values, and generating a protection risk signal if the protection evaluation values exceed a preset protection evaluation threshold; and if the protection evaluation value does not exceed the preset protection evaluation threshold value, generating a protection normal signal.
5. The electric shock prevention system for power grid construction operation according to claim 1, wherein the server is in communication connection with a position risk decision analysis module, the position risk decision analysis module is used for setting a decision period, acquiring the number of times that a key position i is marked as an electric shock risk position in the decision period and defining the key position i as an electric shock risk frequency value, and marking the key position i as a high risk position if the electric shock risk frequency value exceeds a preset electric shock risk frequency threshold value; if the electric risk frequency value does not exceed the preset electric risk frequency threshold value, marking the key position i as a low risk position, and sending the high risk position and the low risk position to a server for storage.
6. The electric shock prevention system for power grid construction operation according to claim 5, wherein the server is in communication connection with the operation matching abnormality judgment module, the server sends the high-risk position to the operation matching abnormality judgment module, after the operation matching abnormality judgment module obtains the high-risk position, the operation personnel at the high-risk position are analyzed, the operation matching performance of the corresponding operation personnel and the corresponding high-risk position is judged, a non-matching signal or a matching signal is generated, the non-matching signal is sent to the operation early-warning module through the server, and the operation early-warning module sends corresponding early warning when receiving the non-matching signal.
7. The electric shock protection system for power grid construction operation according to claim 6, wherein the specific operation process of the operation matching abnormality judgment module is as follows:
Collecting the total duration of the power grid construction operation performed by the corresponding operators in the history stage, marking the total duration as a power grid operation time value, collecting the times of wrong operation of the operators in the power grid construction operation process in the history stage, marking the times as power grid operation wrong frequency values, collecting the end time of the last power grid construction operation performed by the operators, calculating the time difference between the current time and the end time of the last power grid construction operation performed by the operators to obtain a power grid operation time interval value, calculating the power grid operation time value, the power grid operation wrong frequency value and the power grid operation time interval value to obtain a power grid operation analysis value, and generating a matching signal of the corresponding operators if the power grid operation analysis value exceeds a preset power grid operation analysis threshold value; and if the power grid operation analysis value does not exceed the preset power grid operation analysis threshold value, generating a non-matching signal of corresponding operators.
8. The electric shock protection system for electric network construction operation according to claim 1, wherein the server is in communication connection with an operation area alarm grading module, the operation area alarm grading module is used for carrying out alarm grade detection analysis on the electric network construction operation area, marking the electric network construction operation area as a primary alarm area, a secondary alarm area or a tertiary alarm area through analysis, and transmitting grading information of the electric network construction operation area to the operation early warning module through the server.
9. The electric shock protection system for power grid construction operation according to claim 8, wherein the specific analysis process of the alarm level detection analysis is as follows:
Acquiring the number of high-risk positions in a power grid construction operation area, marking the ratio of the number of the high-risk positions to the total number of key positions as a high-risk position occupation value, carrying out summation calculation on electric shock risk frequency values of all the key positions in a decision period, taking an average value to obtain an electric shock risk condition value, and carrying out numerical calculation on the high-risk position occupation value and the electric shock risk condition value to obtain an alarm grade evaluation value;
If the alarm level evaluation value exceeds the maximum value of the preset alarm level evaluation value range, marking the power grid construction operation area as a primary alarm area; if the alarm level evaluation value does not exceed the minimum value of the preset alarm level evaluation value range, marking the power grid construction operation area as a three-level alarm area; and if the alarm level evaluation value is within the preset alarm level evaluation value range, marking the power grid construction operation area as a secondary alarm area.
10. An electric shock prevention method for power grid construction operation, characterized in that the method adopts the electric shock prevention system for power grid construction operation according to any one of claims 1-9.
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