CN112444742B - Relay protection channel monitoring and early warning system - Google Patents
Relay protection channel monitoring and early warning system Download PDFInfo
- Publication number
- CN112444742B CN112444742B CN202011238668.1A CN202011238668A CN112444742B CN 112444742 B CN112444742 B CN 112444742B CN 202011238668 A CN202011238668 A CN 202011238668A CN 112444742 B CN112444742 B CN 112444742B
- Authority
- CN
- China
- Prior art keywords
- early warning
- detection
- unit
- feedback
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 134
- 238000012545 processing Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims description 53
- 238000011156 evaluation Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000002955 isolation Methods 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 15
- 230000001960 triggered effect Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 10
- 230000001186 cumulative effect Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 description 7
- 238000005070 sampling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
Abstract
The invention provides a monitoring and early warning system of a relay protection channel, which comprises a detection device, a feedback device, an early warning device, a processing device, an adjusting device and a processor, wherein the detection device is used for detecting a connecting piece in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to perform processing based on the condition of the early warning device and trigger processing operation. The early warning device is adopted, and the detection device and the feedback device are matched for use, so that the whole device can be more accurate in the using process, and misoperation or misjudgment caused by the early warning device can be prevented to the greatest extent.
Description
Technical Field
The invention relates to the technical field of relay protection, in particular to a relay protection channel monitoring and early warning system.
Background
The analog sampling system is an information source for the work of the relay protection device, and when various faults occur in the power grid, the relay protection device needs to use an analog quantity sampling value to judge the faults so as to complete the functions of removing and isolating the faults. The power supply of the analog sampling system is the heart of the analog sampling system, and when the power supply is abnormal or in an unreliable working state, the effectiveness and the accuracy of a sampling value are seriously influenced, so that the relay protection device does not act correctly.
For example, the CN106841876B prior art discloses a monitoring method for relay protection outlet pressure plate, in which when the state of the protection outlet pressure plate directly affects the grid fault, the protection device can trip the breaker to isolate the fault. Because the protection outlet pressing plate is not monitored, the condition that the outlet pressing plate is missed in the inspection process of the transformer substation or the accident range is enlarged due to the missed investment and virtual connection of the pressing plate also occurs. Another typical remote monitoring and positioning device for hidden faults of power grid relay protection disclosed in the prior art of WO2015035687a1, and referring to a frame and a relay of a relay disclosed in the prior art of WO2015000344a1, the prior art cannot perform judgment on specified working conditions and within specified time; the judgment of the specified working condition can be carried out only by relying on ADC analog sampling, and the prior art cannot realize that the relay protection device finishes the judgment of the working condition of the analog power supply within the specified time so as to determine whether the AC sampling value is credible.
The invention is made in order to solve the problems that the protection setting is wrong or incorrect, the early warning signal cannot be automatically triggered, the stability control strategy is set unreasonably and the like in the field.
Disclosure of Invention
The invention aims to provide a relay protection channel monitoring and early warning system aiming at the defects of the existing relay protection.
In order to overcome the defects of the prior art, the invention adopts the following technical scheme:
a monitoring and early warning system of a relay protection channel comprises a detection device, a feedback device, an early warning device, a processing device, a regulating device and a processor, wherein the detection device is configured to detect a connecting piece in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to perform processing based on the condition of the early warning device and trigger processing operation.
Optionally, the detection device includes an isolation mechanism, a detection mechanism configured to be disposed on the isolation mechanism, and a communicator configured to collect data of the detection mechanism and transmit the data with the processor; the isolation mechanism comprises an isolation cavity, a connecting piece and a reaction unit, wherein the connecting piece is connected with the reaction unit to form a reaction part, and the reaction part is arranged in the isolation cavity; the reaction unit comprises a power detection piece, a moving contact and a return spring, wherein one end of the moving contact is connected with the connecting piece, and the other end of the moving contact is connected with the impedor; the detection mechanism includes a detection probe configured to detect the impeder and trigger protection if a set threshold is exceeded.
Optionally, the feedback device comprises a feedback signal source, a feedback circuit and an energy absorption unit, wherein the feedback signal source is configured to detect whether the detection voltage of the detection device exceeds a threshold value, and the energy absorption unit is configured to absorb energy associated with the voltage of the detection device to limit the voltage to a clamping voltage defined by the energy absorption element; the feedback circuit is configured to command the switch to open in response to the voltage across the resistor exceeding a reference value.
Optionally, the early warning device includes an early warning unit, a signal acquisition unit, and a transmission unit, where the early warning unit is configured to perform early warning on a threshold of the detection device corresponding to the protection channel; the signal acquisition unit is configured to trigger a data summarization of the detection device channel based on a feedback signal of the feedback device; the transmission unit is configured to respond to the early warning signal of the early warning unit based on the data acquired by the signal acquisition unit and trigger the processing operation of the processing device.
Optionally, the processing device includes a plurality of detection sensors, an evaluation mechanism, and a model unit, and each detection sensor is configured to detect a physical parameter in each protection channel; the evaluation device is designed to evaluate the early warning signals in the individual protection channels, and the model unit is designed to store or recall the early warning signals triggered by the early warning devices.
Optionally, the evaluation mechanism is configured to determine whether the plurality of detection sensor measurements correspond to the warning signal based on a current process state in the model unit and the relay protection channel, and to determine a corresponding plurality of estimated values of the at least one parameter based on the model unit; and determining whether the estimate differs from one or more expected values of the at least one parameter given the current process state.
Optionally, the performing the processing operation includes performing a classification operation on the early warning signal by using a trained model unit; the trained model unit is configured to output an early warning category prediction based on one or more input features, and wherein the input features are derived from a plurality of features; the input features include a detected sensor signal, an estimated detected sensor signal, and a residual between the detected sensor signal and the estimated detected sensor signal.
Optionally, the evaluation means is configured to determine a residual between the estimated value and the test-sensor measurement; and determining a cumulative sum of normalized residuals, wherein the normalized residuals are calculated from a difference between the residuals and a historical average of the residuals for a current process state; and detecting whether the current process state is abnormal or not, and generating an early warning alarm in response to the detection of the abnormality.
The beneficial effects obtained by the invention are as follows:
1. the early warning device is adopted and simultaneously based on the matching use between the detection device and the feedback device, so that the whole device can be more accurate in the using process, and misoperation or misjudgment caused by the early warning device is prevented to the greatest extent;
2. the isolation mechanism is used for isolating the line of the protection channel, and the early warning signal is triggered based on the response action of the reaction unit;
3. the feedback microprocessor is adopted to be configured to perform the operation of absorbing or releasing the voltage energy of the detection device by controlling the energy absorption unit after the feedback circuit performs the feedback operation each time, so as to ensure that the next feedback signal can be detected, and further prevent the triggering operation of the signal of the early warning device;
4. data from a detection device and the feedback device are analyzed, a monitoring network is established for the data of the relay protection channel, and the data are displayed in a visual mode, so that monitoring is facilitated;
5. by adopting the model unit and the evaluation mechanism to evaluate the acquired data and responding to the operation corresponding to the evaluation value, the whole system can perform quick action, can automatically run, automatically perform relay protection on-off and has high intelligence.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic control flow diagram of the present invention.
Fig. 2 is a schematic control flow diagram of the feedback mechanism.
Fig. 3 is a control flow diagram of the processing apparatus.
Fig. 4 is a control flow diagram of the evaluation means.
Fig. 5 is a schematic control flow diagram of the model unit.
Fig. 6 is a schematic control flow diagram of the evaluation unit and the measurement values of the detection sensors.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper" and "lower" and "left" and "right" etc., it is only for convenience of description and simplification of the description based on the orientation or positional relationship shown in the drawings, but it is not indicated or implied that the device or assembly referred to must have a specific orientation.
The first embodiment is as follows: a monitoring and early warning system of a relay protection channel comprises a detection device, a feedback device, an early warning device, a processing device, a regulating device and a processor, wherein the detection device is configured to detect a connecting piece in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to process based on the condition of the early warning device and trigger processing operation; the detection device comprises an isolation mechanism, a detection mechanism and a communicator, wherein the detection mechanism is configured to be arranged on the isolation mechanism, and the communicator is configured to collect data of the detection mechanism and transmit the data with the processor; the isolation mechanism comprises an isolation cavity, a connecting piece and a reaction unit, wherein the connecting piece is connected with the reaction unit to form a reaction part, and the reaction part is arranged in the isolation cavity; the reaction unit comprises a power detection piece, a moving contact and a return spring, wherein one end of the moving contact is connected with the connecting piece, and the other end of the moving contact is connected with the impedor; the detection mechanism comprises a detection probe, the detection probe is configured to detect the impedor, and if the detection probe exceeds a set threshold value, protection is triggered; the feedback device includes a feedback signal source configured to detect whether a detection voltage of the detection device exceeds a threshold value, a feedback circuit, and an energy absorption unit configured to absorb energy associated with the voltage of the detection device to limit the voltage to a clamp voltage defined by an energy absorption element; the feedback circuit is configured to command the switch to open in response to the voltage across the resistor exceeding a reference value; the early warning device comprises an early warning unit, a signal acquisition unit and a transmission unit, wherein the early warning unit is constructed to early warn a threshold value of the detection device corresponding to the protection channel; the signal acquisition unit is configured to trigger a data summarization of the detection device channel based on a feedback signal of the feedback device; the transmission unit is configured to respond to the early warning signal of the early warning unit based on the data acquired by the signal acquisition unit and trigger the processing operation of the processing device; the processing device comprises a plurality of detection sensors, an evaluation mechanism and a model unit, wherein each detection sensor is configured to detect a physical parameter in each protection channel; the evaluation mechanism is configured to evaluate the early warning signals in the protection channels, and the model unit is configured to store or call the early warning signals triggered by the early warning device; the evaluation mechanism is configured to determine whether a plurality of test sensor measurements correspond to an early warning signal based on a model unit and a current process state in a relay protection channel, and to determine a corresponding plurality of estimated values of at least one parameter based on the model unit; and determining whether the estimate differs from one or more expected values of the at least one parameter given the current process state; performing the processing operation comprises performing a classification operation on the early warning signal by using a trained model unit; the trained model unit is configured to output an early warning category prediction based on one or more input features, and wherein the input features are derived from a plurality of features; the input features include a detected sensor signal, an estimated detected sensor signal, a residual between the detected sensor signal and the estimated detected sensor signal; the evaluation mechanism is configured to determine a residual between the estimated value and the detection sensor measurement; and determining a cumulative sum of normalized residuals, wherein the normalized residuals are calculated from a difference between the residuals and a historical average of the residuals for a current process state; and detecting whether the current process state is abnormal or not, and generating an early warning alarm in response to the detection of the abnormality.
Example two: the present embodiment should be understood to include at least all the features of any one of the foregoing embodiments, and further improve on the same, and in particular, provide a monitoring and early warning system for a relay protection channel, the monitoring and early warning system includes a detection device, a feedback device, an early warning device, a processing device, a regulating device and a processor, the detection device is configured to detect a connection in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to process based on the condition of the early warning device and trigger processing operation; specifically, in this embodiment, the processor is respectively in control connection with the detection device, the feedback device, the early warning device, the processing device, and the adjustment device, and effectively protects a protection channel of the entire system under the centralized control of the processor; in this embodiment, the detection device and the early warning device perform data acquisition, and after the early warning device acquires data based on the detection device, the whole protection channel performs early warning, so that the whole protection channel is safe; the feedback device and the detection device are both arranged in the protection channel and are used for collecting data in the protection channel; in this embodiment, the early warning device is used based on the cooperation between the detection device and the feedback device, so that the whole device can be more accurate in the using process, and misoperation or misjudgment caused by the early warning device can be prevented to the greatest extent;
the detection device comprises an isolation mechanism, a detection mechanism and a communicator, wherein the detection mechanism is configured to be arranged on the isolation mechanism, and the communicator is configured to collect data of the detection mechanism and transmit the data with the processor; the isolation mechanism comprises an isolation cavity, a connecting piece and a reaction unit, wherein the connecting piece is connected with the reaction unit to form a reaction part, and the reaction part is arranged in the isolation cavity; the reaction unit comprises a power detection piece, a moving contact and a return spring, wherein one end of the moving contact is connected with the connecting piece, and the other end of the moving contact is connected with the impedor; the detection mechanism comprises a detection probe, the detection probe is configured to detect the impedor, and if the detection probe exceeds a set threshold value, protection is triggered; specifically, the isolation mechanism is used for isolating a line of a protection channel and triggering the early warning signal based on a response action of the reaction unit; in this embodiment, the communicator is connected to the reaction unit, and is configured to respond to data set by the reaction unit, so as to ensure that the abnormal signal of the protection channel can be captured; in this embodiment, the moving contact is connected to the impeder, and is configured to isolate a current and prevent a detection element of the reaction unit from being broken down by a surge of the current; in this embodiment, the reaction units are correspondingly arranged in the protection channels and trigger operations on abnormal signals appearing in the protection channels;
the feedback device includes a feedback signal source configured to detect whether a detection voltage of the detection device exceeds a threshold value, a feedback circuit, and an energy absorption unit configured to absorb energy associated with the voltage of the detection device to limit the voltage to a clamp voltage defined by an energy absorption element; the feedback circuit is configured to command the switch to open in response to the voltage across the resistor exceeding a reference value; specifically, the feedback device is configured to detect a detection operation of the detection device, that is: the feedback circuit is configured to process the feedback signal source, and the processing operation comprises amplification, noise reduction, filtering or conversion; the feedback circuit is well known to those skilled in the art, and those skilled in the art can query the relevant technical manual, so that details are not repeated in this embodiment; in this embodiment, the feedback device further includes a feedback microprocessor configured to prevent the signal of the warning device from triggering operation by controlling the energy absorption unit to absorb or release the voltage energy of the detection device after each feedback operation of the feedback circuit, so as to ensure that a next feedback signal can be detected; the feedback signal source is matched with the isolation mechanism of the detection device and the reaction unit for use, so that the detection device can be compared with a set threshold value in the feedback operation; in addition, the threshold value is preset, and adaptive adjustment is carried out based on the actual situation;
the early warning device comprises an early warning unit, a signal acquisition unit and a transmission unit, and the early warning unit is constructed for early warning the threshold value of the detection device corresponding to the protection channel; the signal acquisition unit is configured to trigger a data summarization of the detection device channel based on a feedback signal of the feedback device; the transmission unit is configured to respond to the early warning signal of the early warning unit based on the data acquired by the signal acquisition unit and trigger the processing operation of the processing device; specifically, the early warning unit realizes early warning operation on the early warning device based on feedback data of the detection device and the feedback device under the summary of the signal acquisition unit; in this embodiment, the transmission unit performs an operation of transmitting the data, detects the state of each protection channel, and triggers an early warning signal to the early warning unit; in this embodiment, the early warning unit is further configured to trigger an alarm signal or an alarm operation, the alarm signal including, but not limited to, the following listed several: common alarm operations such as warning sound alarm, warning lamp alarm and the like; in addition, the early warning unit is also configured to perform visual monitoring on the early warning signal; the monitoring unit is configured to display the status in each protection channel based on the acquisition of the signals of the detection device and the feedback device; the data from the detection device and the feedback device are analyzed, a monitoring network is established for the data of the relay protection channel, and the data are displayed in a visual mode, so that the monitoring is convenient; grouping data from relay protection channels of various levels are included; the packet data includes the following modules: the data packet analyzer is used for detecting the network data packets, analyzing the network data packets and generating logs of different network protocols; network characteristics may include packet type, packet timing, and information about the packet payload; the physical features may be extracted from the packet payload and may include, for example, the status of the reaction cell or the detection sensor readings;
the processing device comprises a plurality of detection sensors, an evaluation mechanism and a model unit, wherein each detection sensor is configured to detect a physical parameter in each protection channel; the evaluation mechanism is configured to evaluate the early warning signals in the protection channels, and the model unit is configured to store or call the early warning signals triggered by the early warning device; in particular, the evaluation means are configured to determine whether a plurality of detection sensor measurements correspond to a warning signal based on a model unit and a current process state in the relay protection channel, and to determine a corresponding plurality of estimated values of at least one parameter based on the model unit; and determining whether the estimate differs from one or more expected values of the at least one parameter given the current process state; specifically, a model unit for simulating the early warning signal is arranged in the processing device, and the model unit is configured to collect the signal and classify the signal based on the signal; if the signal type is consistent with the model signal stored in the model unit, triggering an early warning signal corresponding to the early warning signal; in this embodiment, the processing unit further evaluates the early warning signals fed back by the feedback devices according to the evaluation operation of the evaluation mechanism, and if the early warning signals are consistent with the set signals, the processing unit triggers the early warning operation; the processing device further comprises a packet parser and/or a threat detector configured to determine a residual between the estimate and the detected sensor measurement; determining a cumulative sum of normalized residuals, the normalized residuals calculated from a difference between the residuals and a historical average of the residuals for a current process state; detecting whether an anomaly exists in the current process state based on at least the cumulative sum; responding to the detected abnormality and triggering a corresponding alarm to the early warning device;
performing the processing operation comprises performing a classification operation on the early warning signal by using a trained model unit; the trained model unit is configured to output an early warning category prediction based on one or more input features, and wherein the input features are derived from a plurality of features; the input features include a detected sensor signal, an estimated detected sensor signal, a residual between the detected sensor signal and the estimated detected sensor signal; specifically, in this embodiment, each detection sensor is disposed in the detection device, and each detection sensor is configured to collect a signal of the relay protection channel; meanwhile, residual errors among the signals of the detection sensors are calculated, so that the historical trend of the detection values of the whole detection sensor can be detected, and early warning operation is triggered based on whether the residual errors exceed a set threshold value; the model unit and the evaluation mechanism evaluate the acquired data and respond to the operation corresponding to the evaluation value, so that the whole system can perform quick action and can also automatically run; the evaluation mechanism is configured to determine a residual between the estimated value and the detection sensor measurement; and determining a cumulative sum of normalized residuals, wherein the normalized residuals are calculated from a difference between the residuals and a historical average of the residuals for a current process state; and detecting whether the current process state is abnormal or not, and generating an early warning alarm in response to the detection of the abnormality.
Example three: the present embodiment should be understood to include at least all the features of any one of the foregoing embodiments, and further improve on the same, and in particular, provide a monitoring and early warning system for a relay protection channel, the monitoring and early warning system includes a detection device, a feedback device, an early warning device, a processing device, a regulating device and a processor, the detection device is configured to detect a connection in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to process based on the condition of the early warning device and trigger processing operation; specifically, in this embodiment, the processor is respectively in control connection with the detection device, the feedback device, the early warning device, the processing device, and the adjustment device, and effectively protects a protection channel of the entire system under the centralized control of the processor; in this embodiment, the detection device and the early warning device perform data acquisition, and after the early warning device acquires data based on the detection device, the whole protection channel performs early warning, so that the whole protection channel is safe; the feedback device and the detection device are both arranged in the protection channel and are used for collecting data in the protection channel; in this embodiment, the early warning device is used based on the cooperation between the detection device and the feedback device, so that the whole device can be more accurate in the using process, and misoperation or misjudgment caused by the early warning device can be prevented to the greatest extent;
the processing device comprises a plurality of detection sensors, an evaluation mechanism and a model unit, wherein each detection sensor is configured to detect a physical parameter in each protection channel; the evaluation mechanism is configured to evaluate the early warning signals in the protection channels, and the model unit is configured to store or call the early warning signals triggered by the early warning device; in particular, the evaluation means are configured to determine whether a plurality of detection sensor measurements correspond to a warning signal based on a model unit and a current process state in the relay protection channel, and to determine a corresponding plurality of estimated values of at least one parameter based on the model unit; and determining whether the estimate differs from one or more expected values of the at least one parameter given the current process state; specifically, a model unit for simulating the early warning signal is arranged in the processing device, and the model unit is configured to collect the signal and classify the signal based on the signal; if the signal type is consistent with the model signal stored in the model unit, triggering an early warning signal corresponding to the early warning signal; in this embodiment, the processing unit further evaluates the early warning signals fed back by the feedback devices according to the evaluation operation of the evaluation mechanism, and if the early warning signals are consistent with the set signals, the processing unit triggers the early warning operation; the processing device further comprises a packet parser and/or a threat detector configured to determine a residual between the estimate and the detected sensor measurement; determining a cumulative sum of normalized residuals, the normalized residuals calculated from a difference between the residuals and a historical average of the residuals for a current process state; detecting whether an anomaly exists in the current process state based on at least the cumulative sum; responding to the detected abnormality and triggering a corresponding alarm to the early warning device;
performing the processing operation comprises performing a classification operation on the early warning signal by using a trained model unit; the trained model unit is configured to output an early warning category prediction based on one or more input features, and wherein the input features are derived from a plurality of features; the input features include a detected sensor signal, an estimated detected sensor signal, a residual between the detected sensor signal and the estimated detected sensor signal; specifically, in this embodiment, each detection sensor is disposed in the detection device, and each detection sensor is configured to collect a signal of the relay protection channel; meanwhile, residual errors among the signals of the detection sensors are calculated, so that the historical trend of the detection values of the whole detection sensor can be detected, and early warning operation is triggered based on whether the residual errors exceed a set threshold value; the model unit and the evaluation mechanism evaluate the acquired data and respond to the operation corresponding to the evaluation value, so that the whole system can perform quick action and can also automatically run; the evaluation mechanism is configured to determine a residual between the estimated value and the detection sensor measurement; and determining a cumulative sum of normalized residuals, wherein the normalized residuals are calculated from a difference between the residuals and a historical average of the residuals for a current process state; detecting whether the current process state is abnormal or not, and responding to the detected abnormality to generate an early warning alarm;
in addition, the present embodiment provides an algorithm for evaluating the parameters, and any N sets of values of a certain detection sensor in the protection channel are taken to form a matrix set, and are put into the following formula,
wherein N is the detection data of the N groups of data, and k is the sensitivity of the detection sensor; x is the dimension of a row in the matrix set; y is the dimension of the columns in the matrix set.
Filtering the existing numerical deviation by adopting an equation (2);
r(n)＝r(n-1)+pn[l(n)-r(n-1]*Fn (2)
the values of the detection sensors are all calculated by formula (3) and then are subjected to recursive calculation to obtain the measurement value x of the detection sensorsiMean square value of (P)nThe calculated value of (a);
Pnfor the nth recursion, the measured value x of the sensor is detectediA calculated value of the mean square value of (c);
solving for x by equation (3)iReference value of calculated value of (Ture) (x)i)；
Ture(xi)＝T2-Pn (4)
Then, by the formula (4), for xiPerforming binary judgment;
Fn＝xi-T*Ture(xi) (5)
when F is presentnWhen the average value is higher than the mean value, recording the average value in a data memory, and calling by a formula (2);
comprehensively obtaining a score function omega (x) of the evaluation value according to the formula;
wherein j is the number of measurements; acquisition T and feedback function D of the detection device in the above equationiThe adjustment is carried out according to the formula (7),
wherein, j 1, 2, 3.; taking a value between 0.2 and 2, wherein the determination of the value is determined by the efficiency of the detection sensor; wherein V comprises a feedback speed V and a second time feedback signal speed difference Deltav,
in the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
In summary, according to the monitoring and early warning system for the relay protection channel, the early warning device is adopted and simultaneously based on the matching use between the detection device and the feedback device, so that the whole device can be more accurate in the using process, and misoperation or misjudgment caused by the early warning device can be prevented to the greatest extent; the isolation mechanism is used for isolating the line of the protection channel, and the early warning signal is triggered based on the response action of the reaction unit; the feedback microprocessor is adopted to be configured to perform the operation of absorbing or releasing the voltage energy of the detection device by controlling the energy absorption unit after the feedback circuit performs the feedback operation each time, so as to ensure that the next feedback signal can be detected, and further prevent the triggering operation of the signal of the early warning device; data from a detection device and the feedback device are analyzed, a monitoring network is established for the data of the relay protection channel, and the data are displayed in a visual mode, so that monitoring is facilitated; by adopting the model unit and the evaluation mechanism to evaluate the acquired data and responding to the operation corresponding to the evaluation value, the whole system can perform quick action, can automatically run, automatically perform relay protection on-off and has high intelligence.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of example configurations, including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the present invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (1)
1. A monitoring and early warning system for a relay protection channel is characterized by comprising a detection device, a feedback device, an early warning device, a processing device, a regulating device and a processor, wherein the detection device is configured to detect a connecting piece in the protection channel; the feedback device is configured to feed back transmission of electric power in each of the protection channels; the early warning device is configured to alert the feedback device of an error; the processing device is configured to process based on the condition of the early warning device and trigger processing operation;
the detection device comprises an isolation mechanism, a detection mechanism and a communicator, wherein the detection mechanism is configured to be arranged on the isolation mechanism, and the communicator is configured to collect data of the detection mechanism and transmit the data with the processor; the isolation mechanism comprises an isolation cavity, a connecting piece and a reaction unit, wherein the connecting piece is connected with the reaction unit to form a reaction part, and the reaction part is arranged in the isolation cavity; the reaction unit comprises a power detection piece, a moving contact and a return spring, wherein one end of the moving contact is connected with the connecting piece, and the other end of the moving contact is connected with the impedor; the detection mechanism comprises a detection probe, the detection probe is configured to detect the impedor, and if the detection probe exceeds a set threshold value, protection is triggered;
the feedback device includes a feedback signal source configured to detect whether a detection voltage of the detection device exceeds a threshold value, a feedback circuit, and an energy absorption unit configured to absorb energy associated with the voltage of the detection device to limit the voltage to a clamp voltage defined by an energy absorption element; the feedback circuit is configured to command the switch to open in response to the voltage across the resistor exceeding a reference value;
the early warning device comprises an early warning unit, a signal acquisition unit and a transmission unit, wherein the early warning unit is constructed to early warn a threshold value of the detection device corresponding to the protection channel; the signal acquisition unit is configured to trigger a data summarization of the detection device channel based on a feedback signal of the feedback device; the transmission unit is configured to respond to the early warning signal of the early warning unit based on the data acquired by the signal acquisition unit and trigger the processing operation of the processing device;
the processing device comprises a plurality of detection sensors, an evaluation mechanism and a model unit, wherein each detection sensor is configured to detect a physical parameter in each protection channel; the evaluation mechanism is configured to evaluate the early warning signals in the protection channels, and the model unit is configured to store or call the early warning signals triggered by the early warning device;
the evaluation mechanism is configured to determine whether a plurality of detection sensor measurements correspond to an early warning signal based on a current process state in a model unit and a relay protection channel, and to determine a corresponding plurality of estimated values of at least one parameter based on the model unit; and determining whether the estimate differs from one or more expected values of the at least one parameter given the current process state;
performing the processing operation comprises performing a classification operation on the early warning signal by using a trained model unit; the trained model unit is configured to output an early warning category prediction based on one or more input features, and wherein the input features are derived from a plurality of features; the input features include a detected sensor signal, an estimated detected sensor signal, a residual between the detected sensor signal and the estimated detected sensor signal;
the evaluation mechanism is configured to determine a residual between the estimated value and the detection sensor measurement; and determining a cumulative sum of normalized residuals, wherein the normalized residuals are calculated from a difference between the residuals and a historical average of the residuals for a current process state; and detecting whether the current process state is abnormal or not, and generating an early warning alarm in response to the detection of the abnormality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238668.1A CN112444742B (en) | 2020-11-09 | 2020-11-09 | Relay protection channel monitoring and early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238668.1A CN112444742B (en) | 2020-11-09 | 2020-11-09 | Relay protection channel monitoring and early warning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112444742A CN112444742A (en) | 2021-03-05 |
| CN112444742B true CN112444742B (en) | 2022-05-06 |
Family
ID=74736121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238668.1A Active CN112444742B (en) | 2020-11-09 | 2020-11-09 | Relay protection channel monitoring and early warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112444742B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115102959A (en) * | 2022-08-04 | 2022-09-23 | 常州工程职业技术学院 | Indoor robot communication system applied to inspection |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0673014A2 (en) * | 1994-03-17 | 1995-09-20 | Nippon Telegraph And Telephone Corporation | Acoustic signal transform coding method and decoding method |
| JP2000259190A (en) * | 1999-03-09 | 2000-09-22 | Matsushita Electric Ind Co Ltd | Method for compressing and decoding audio signal, and audio signal compressing device |
| WO2005022600A2 (en) * | 2003-08-29 | 2005-03-10 | Inficon Lt, Inc. | Method and systems for processing overlay data |
| CN102323499A (en) * | 2011-06-15 | 2012-01-18 | 北京四方继保自动化股份有限公司 | Method for automatically testing relay protection equipment |
| CN103353556A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Relay protection device pressboard outlet logic detection apparatus |
| CN103353557A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Main transformer protection tripping matrix exit auxiliary tester |
| CN103473322A (en) * | 2013-09-13 | 2013-12-25 | 国家电网公司 | Photovoltaic generation power ultra-short term prediction method based on time series model |
| CN205355960U (en) * | 2016-02-18 | 2016-06-29 | 国网山东省电力公司郓城县供电公司 | Online monitored control system of relay protection and automatic safety device |
| CN107967520A (en) * | 2017-09-27 | 2018-04-27 | 国网安徽省电力有限公司 | A kind of synthetical condition assessment theoretical method towards novel intelligent station relay protection device |
| WO2020125040A1 (en) * | 2018-12-17 | 2020-06-25 | 大连理工大学 | Method for designing topological shape of curved surface partition machining trajectory on basis of vector field |
| CN111738348A (en) * | 2020-06-29 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Power data anomaly detection method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69836785T2 (en) * | 1997-10-03 | 2007-04-26 | Matsushita Electric Industrial Co., Ltd., Kadoma | Audio signal compression, speech signal compression and speech recognition |
| CN105652199A (en) * | 2016-04-20 | 2016-06-08 | 国家电网公司 | Detection device of transformer substation relay protection outlet |
-
2020
- 2020-11-09 CN CN202011238668.1A patent/CN112444742B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0673014A2 (en) * | 1994-03-17 | 1995-09-20 | Nippon Telegraph And Telephone Corporation | Acoustic signal transform coding method and decoding method |
| JP2000259190A (en) * | 1999-03-09 | 2000-09-22 | Matsushita Electric Ind Co Ltd | Method for compressing and decoding audio signal, and audio signal compressing device |
| WO2005022600A2 (en) * | 2003-08-29 | 2005-03-10 | Inficon Lt, Inc. | Method and systems for processing overlay data |
| CN102323499A (en) * | 2011-06-15 | 2012-01-18 | 北京四方继保自动化股份有限公司 | Method for automatically testing relay protection equipment |
| CN103353556A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Relay protection device pressboard outlet logic detection apparatus |
| CN103353557A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Main transformer protection tripping matrix exit auxiliary tester |
| CN103473322A (en) * | 2013-09-13 | 2013-12-25 | 国家电网公司 | Photovoltaic generation power ultra-short term prediction method based on time series model |
| CN205355960U (en) * | 2016-02-18 | 2016-06-29 | 国网山东省电力公司郓城县供电公司 | Online monitored control system of relay protection and automatic safety device |
| CN107967520A (en) * | 2017-09-27 | 2018-04-27 | 国网安徽省电力有限公司 | A kind of synthetical condition assessment theoretical method towards novel intelligent station relay protection device |
| WO2020125040A1 (en) * | 2018-12-17 | 2020-06-25 | 大连理工大学 | Method for designing topological shape of curved surface partition machining trajectory on basis of vector field |
| CN111738348A (en) * | 2020-06-29 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Power data anomaly detection method and device |
Non-Patent Citations (2)
| Title |
|---|
| Quality assessment model for smartphone camera photo based on inception network with residual module and batch normalization;Shuning Xu 等;《2020 IEEE International Conference on Multimedia & Expo Workshops (ICMEW)》;20200609;全文 * |
| 基于网络模型的城市公共自行车需求量预测研究;林燕平 等;《计算机应用研究》;20170930;第34卷(第9期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112444742A (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106291201B (en) | Lightning monitoring and degradation state monitoring system and method for lightning protection box | |
| CN110941918B (en) | Intelligent substation fault analysis system | |
| KR101631267B1 (en) | A Photovoltaic Modular Abnormal Condition Effective Diagnosis System and Method thereof | |
| CN103674286A (en) | In-station communication device fault diagnosis method based on infrared image | |
| CN112444742B (en) | Relay protection channel monitoring and early warning system | |
| KR20180031454A (en) | Appartus and method monitoring insulator strings | |
| CN102507816B (en) | Method for detecting effectiveness of oil chromatogram online monitoring data | |
| CN115077605A (en) | Intelligent substation management system | |
| CN209400633U (en) | Transformer turn-to-turn short circuit on-line monitoring system based on electric energy loss | |
| CN116796261B (en) | Closed switch equipment mechanical characteristic prediction method based on artificial intelligence | |
| CN109342904A (en) | A kind of method and device of arc fault detection and early warning | |
| CN109324255A (en) | Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss | |
| CN116131214B (en) | Network management system of digital harmonic elimination device and use method thereof | |
| CN108469565B (en) | Power failure diagnosis method and application thereof in power failure diagnosis | |
| CN115575795A (en) | Aging test device and method for circuit board card | |
| CN113777452B (en) | DC system grounding test device and method for voltage self-adaptive station | |
| CN106486175B (en) | Nuclear power plant's foul drainage system sodium ion Indexes Abnormality diagnostic device and method | |
| CN115270982A (en) | Switch cabinet fault prediction method based on multi-data neural network | |
| CN113672658A (en) | Power equipment online monitoring error data identification method based on multiple correlation coefficients | |
| CN117406048B (en) | Transformer discharge fault diagnosis method and device | |
| CN111983295A (en) | Equipment fault prediction method and system | |
| KR20080091876A (en) | Protection methord of relay means trouble | |
| CN116544877B (en) | Relay protection device for real-time monitoring of submarine cable current of offshore oil platform | |
| CN212111304U (en) | Fixed gas detector with self-checking function | |
| CN117093904B (en) | Transformer substation fire detection data acquisition method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |