CN115061037A - Method, system, device and storage medium for determining state of relay winding - Google Patents
Method, system, device and storage medium for determining state of relay winding Download PDFInfo
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- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The embodiment of the invention discloses a method, a system, equipment and a storage medium for determining the state of a relay winding, wherein the method comprises the following steps: receiving sudden change quantity signals of input current and output current, and voltage and current signals at two ends of a relay; determining a first state of a winding of the relay according to the input current and the sudden change signal of the output current; when the first state is winding abnormity, determining the abnormal offset of the winding by using the signal acquisition times of the relay, the voltage at two ends of the relay and the current signal; and determining a second state of the winding of the relay, namely the abnormal degree of the winding according to the offset and the opening and closing action information of the relay. The abnormal offset of the winding can be determined by detecting the current and voltage conditions of the relay in the mode, the state of the relay is judged to avoid the influence of faulty operation of the relay on the normal action of the breaker, and the state of the relay with the abnormal winding is further determined to improve the use value of the relay and reduce the operation and maintenance cost.
Description
Technical Field
The present invention relates to the field of power control technologies, and in particular, to a method, a system, a device, and a storage medium for determining a state of a relay winding.
Background
The SF6 circuit breaker of 110kV and above generally adopts a time relay and an intermediate relay to control an energy storage motor, a low-pressure locking function and a circuit breaker opening and closing function, generally operates outdoors and is greatly influenced by external environment, particularly when the temperature and the humidity are low and high, the insulation reduction of auxiliary contacts of the circuit breaker, lead-out cables of the auxiliary contacts, a relay and the like is easily caused by dampness, one of the auxiliary contacts can cause two-point grounding of a non-full-phase protection starting circuit and the like, and three-phase inconsistent protection misoperation of a body is easily caused; the two energy storage motors can continuously store energy, so that the energy storage motors can be burnt out; thirdly, the low-pressure locking function is invalid, and after the circuit breaker is in the low-pressure alarm, the circuit breaker can still be normally opened and closed, so that the circuit breaker is seriously damaged.
In order to prevent the reduction of the insulation capability and the damage of the equipment, the related circuits of the heating resistors automatically started by the temperature and humidity sensors are usually installed in the branch control box and the junction control box of the circuit breaker.
However, it is found through field inspection and research that the above-mentioned method still cannot effectively prevent the reduction of the insulation capability and the damage of the equipment. Therefore, at present, a method for effectively detecting the state of the relay winding is still lacking, and knowing the state of the relay prevents the relay from being refused or being operated mistakenly, so that the situations of reduction of the insulation capability and damage of the equipment are caused.
Disclosure of Invention
The invention mainly aims to provide a method, a system, equipment and a storage medium for determining the state of a relay winding, which can solve the problem that the prior art lacks a mode for effectively detecting the state of the relay winding.
To achieve the above object, a first aspect of the present invention provides a method for determining a state of a relay winding, the method comprising:
receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module;
determining a first state of a winding of the relay according to the input sudden change current signal and the output sudden change current signal, wherein the first state comprises winding abnormity or winding normality;
when the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay;
and determining a second state of the winding of the relay according to the offset and the opening and closing action information of the relay, wherein the second state is used for reflecting the abnormal degree of the winding of the relay.
In a feasible implementation manner, the determining the second state of the winding of the relay according to the offset and the opening and closing action information of the relay includes:
determining a stability coefficient of a winding deformation quantity of the relay with the abnormal winding by using the opening and closing action times and the offset of each opening and closing action;
and determining a second state of the winding of the relay according to the stability coefficient and a preset stability coefficient threshold value.
In a possible implementation manner, if the second state includes a continuous use state or a state to be replaced, the determining the second state of the winding of the relay according to the stability coefficient and a preset stability coefficient threshold includes:
when the stability coefficient is smaller than the stability coefficient threshold value, determining that the second state of the winding of the relay is a continuous use state;
and when the stability coefficient is larger than or equal to the stability coefficient threshold value, determining that the second state of the winding of the relay is a state to be replaced.
In one possible implementation manner, the determining the offset of the winding abnormality by using the voltage signal, the current signal and the signal acquisition times of the relay includes:
wherein, U is a voltage signal at two ends of the relay; i is a current signal at two ends of the relay; u shape S Is a reference voltage signal; i is S Is a reference current signal; f. of m Is the main offset; f. of n Is an auxiliary offset; beta is an offset; m and n are the signal acquisition times.
In one possible implementation manner, the determining, by using the number of switching on/off operations and the offset of each switching on/off operation, a stability coefficient of a winding deformation amount of the relay with the winding abnormality includes:
wherein α is a stability coefficient; beta is a N The offset of each opening and closing action is shown; n is the opening and closing action times of the relay, and N is a natural number.
In one possible implementation, the determining a first state of a winding of the relay according to the input and output abrupt current signals includes:
determining a current signal deviation by using the input and output abrupt change current signals;
determining a first state of a winding of the relay based on the current signal deviation.
In one possible implementation, the method further includes:
and when the stability coefficient is larger than or equal to the stability coefficient threshold value and the breaker meets the tripping action condition, controlling the voltage acquisition module and the current acquisition module to be in short circuit with the relay and controlling the breaker to perform tripping action.
To achieve the above object, a second aspect of the present invention provides a state determining system for a relay winding, the system comprising: the device comprises a sudden change input module, a sudden change output module, a current acquisition module, a voltage acquisition module, a fault detection module and a data display module;
one end of the sudden change input module is electrically connected with the input end of the relay, and the other end of the sudden change input module is electrically connected with the first end of the fault detection module;
one end of the sudden change output module is electrically connected with the output end of the relay, and the other end of the sudden change output module is electrically connected with the second end of the fault detection module;
one end of the current acquisition module is electrically connected with the input end of the relay, the other end of the current acquisition module is electrically connected with the third end of the fault detection module, one end of the voltage acquisition module is electrically connected with the output end of the relay, and the other end of the voltage acquisition module is electrically connected with the fourth end of the fault detection module;
the fifth end of the fault detection module is electrically connected with one end of the data display module;
the input module of the break variable is used for collecting the input break variable current signal of the relay and sending the input break variable current signal to the fault monitoring module;
the abrupt change output module is used for acquiring an output abrupt change current signal of the relay and sending the output abrupt change current signal to the fault monitoring module;
the current acquisition module is used for acquiring current signals at two ends of the relay and sending the current signals to the fault monitoring module;
the voltage acquisition module is used for acquiring voltage signals at two ends of the relay and sending the voltage signals to the fault monitoring module;
the fault detection module is used for executing the steps of the relay winding state determination method according to any one of claims 1 to 7 and sending input abrupt change current signals, output abrupt change current signals, voltage signals, current signals and opening and closing action information to the data display module;
the data display module is used for receiving the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information, and displaying the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information to a preset display screen.
To achieve the above object, a third aspect of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method for determining the state of a relay winding according to the first aspect and any of the possible implementations.
To achieve the above object, a fourth aspect of the present invention provides a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method for determining the state of a relay winding according to the first aspect and any of the possible implementations.
The embodiment of the invention has the following beneficial effects:
the invention provides a method for determining the state of a relay winding, which comprises the following steps: receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module; determining a first state of a winding of the relay according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality; when the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay; and determining a second state of the winding of the relay according to the offset and the opening and closing action information of the relay, wherein the second state is used for reflecting the abnormal degree of the winding of the relay. The abnormal offset of the winding can be determined by detecting the current and voltage conditions of the relay, the state of the relay is judged to avoid the influence of the faulty operation of the relay on the normal action of the breaker, and the state of the relay with the abnormal winding is further determined to improve the use value of the relay to the maximum extent and reduce the operation and maintenance cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is an application environment diagram of a method for determining a state of a relay winding according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for determining a state of a relay winding according to an embodiment of the present invention;
FIG. 3 is another flow chart of a method for determining the state of a relay winding according to an embodiment of the present invention;
fig. 4 is a block diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Note that, the high-voltage circuit breaker: it not only can cut off or close no-load current and load current in the high-voltage circuit, and when the system broke down, through the effect of relay protection device, cut off overload current and short-circuit current moreover, it has fairly perfect arc extinguishing structure and sufficient cutout ability, and the main circuit breaker type of present electric wire netting enterprise is: sulfur hexafluoride circuit breakers, vacuum circuit breakers, etc.
A relay: the electric control device is an electric appliance which generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). The relay in the existing power grid mainly comprises a time relay and an intermediate relay and is used for controlling an energy storage motor, low-pressure locking and the like.
And (3) failure: after the relay is in failure, the energy storage motor can be burnt out, and the low-pressure locking function is invalid.
Referring to fig. 1, fig. 1 is an application environment diagram of a method for determining a state of a relay winding according to an embodiment of the present invention; the application environment shown in fig. 1 includes: the state determination system 100 of the relay winding and the relay 200, wherein the state determination system 100 of the relay winding specifically includes: the device comprises an abrupt change input module 102, an abrupt change output module 103, a current acquisition module 104, a voltage acquisition module 105, a fault detection module 101 and a data display module 106.
It should be noted that the relay types in this embodiment include, but are not limited to, a current relay, a time relay, a signal relay, and an intermediate relay, and when the relays of different types correspond to different opening and closing conditions, and when the relays satisfy the corresponding opening and closing conditions, the circuit breaker may be controlled to perform opening and closing operations, so as to protect the circuit.
One end of the abrupt change input module 102 is electrically connected with the input end of the relay 200, and the other end of the abrupt change input module 102 is electrically connected with the first end of the fault detection module 101; one end of the abrupt change output module 103 is electrically connected with the output end of the relay 200, and the other end of the abrupt change output module 103 is electrically connected with the second end of the fault detection module 101; one end of the current collection module 104 is electrically connected with the input end of the relay, the other end of the current collection module is electrically connected with the third end of the fault detection module 101, one end of the voltage collection module 105 is electrically connected with the output end of the relay 200, and the other end of the voltage collection module 105 is electrically connected with the fourth end of the fault detection module 101; the fifth end of the fault detection module 101 is electrically connected with one end of the data display module 116;
further, the sudden change input module is used for acquiring a sudden change current signal input by the relay and sending the sudden change current signal to the fault monitoring module; the sudden change output module is used for acquiring an output sudden change current signal of the relay and sending the output sudden change current signal to the fault monitoring module;
the input abrupt change quantity current signal is a current signal of an input end of the relay, and the output abrupt change quantity current signal is a current signal of an output end of the relay, wherein the input abrupt change quantity current signal and the output abrupt change quantity current signal can be used for reflecting the state of a winding in the relay so as to reflect whether the winding has abnormal conditions such as deformation.
The current acquisition module is used for acquiring current signals at two ends of the relay and sending the current signals to the fault monitoring module; and the voltage acquisition module is used for acquiring voltage signals at two ends of the relay and sending the voltage signals to the fault monitoring module. Furthermore, the sudden change input module, the sudden change output module, the current collection module and the voltage collection module can be regarded as signal collection devices for respectively collecting different electronic signals.
The current and voltage acquisition module mainly acquires current and voltage signals of the input side and the output side of the relay, and stores the current and voltage signals of the opening and closing action of the relay at each time through a storage unit in the current and voltage acquisition module.
The fault detection module is used for executing the steps of the relay winding state determination method, and sending input mutation quantity current signals, output mutation quantity current signals, voltage signals, current signals and opening and closing action information to the data display module; the relay fault detection device has the advantages that signals such as current, voltage, power, coil deformation and displacement are synchronously monitored, whether the working state of the relay is normal or not is directly judged through the fault detection module, and the phenomenon that the relay does not normally act to damage electrical equipment is avoided.
The data display module is used for receiving the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information, and displaying the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information to a preset display screen.
The invention provides a state determination system for a relay winding, which comprises: the device comprises a sudden change input module, a sudden change output module, a current acquisition module, a voltage acquisition module, a fault detection module and a data display module; one end of the sudden change input module is electrically connected with the input end of the relay, and the other end of the sudden change input module is electrically connected with the first end of the fault detection module; one end of the sudden change output module is electrically connected with the output end of the relay, and the other end of the sudden change output module is electrically connected with the second end of the fault detection module; one end of the current acquisition module is electrically connected with the input end of the relay, the other end of the current acquisition module is electrically connected with the third end of the fault detection module, one end of the voltage acquisition module is electrically connected with the input end of the relay, and the other end of the voltage acquisition module is electrically connected with the fourth end of the fault detection module; one end of the fault detection module is also electrically connected with the fifth end of the data display module; the input module of the break variable, is used for gathering the input break variable current signal of the relay, and will input the break variable current signal to send to the fault monitoring module; the sudden change output module is used for acquiring an output sudden change current signal of the relay and sending the output sudden change current signal to the fault monitoring module; the current acquisition module is used for acquiring current signals at two ends of the relay and sending the current signals to the fault monitoring module; the voltage acquisition module is used for acquiring voltage signals at two ends of the relay and sending the voltage signals to the fault monitoring module; the fault detection module is used for executing the steps of the relay winding state determining method, and sending input mutation quantity current signals, output mutation quantity current signals, voltage signals, current signals and opening and closing action information to the data display module; the data display module is used for receiving the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information, and displaying the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information to a preset display screen. The abnormal offset of the winding can be determined by detecting the current and voltage conditions of the relay, the state of the relay is judged to avoid the influence of the faulty operation of the relay on the normal action of the breaker, and the state of the relay with the abnormal winding is further determined to improve the use value of the relay to the maximum extent and reduce the operation and maintenance cost.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for determining a state of a relay winding according to an embodiment of the present invention, where the method shown in fig. 2 includes the following steps:
201. receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module;
it should be noted that an executing body of the method for determining the state of the relay winding may be a fault detection module as shown in fig. 1, where the fault detection module includes, but is not limited to, a control device (an upper computer, a control chip) with an operation processing capability, a processor, and the like, where the fault detection module is in communication connection with both the mutation amount input module and the mutation amount output module, for example, the fault detection module is electrically connected or connected to the mutation amount input module through a network, and the fault detection module is electrically connected or connected to the mutation amount output module through a network, so that the fault detection module can receive an input mutation amount current signal of the relay collected by the mutation amount input module and an output mutation amount current signal of the relay collected by the mutation amount output module. Furthermore, the fault detection module is also in communication connection with the voltage acquisition module and the current acquisition module, for example, the fault detection module and the voltage acquisition module are connected through an electrical connection or a network, and the fault detection module and the current acquisition module are connected through an electrical connection or a network, so that the fault detection module can receive voltage signals at two ends of the relay acquired by the voltage acquisition module and current signals at two ends of the relay acquired by the current acquisition module.
202. Determining a first state of a winding of the relay according to the input sudden change current signal and the output sudden change current signal, wherein the first state comprises winding abnormity or winding normality;
further, after obtaining an input variable current signal and an output variable current signal of the relay and voltage signals and current signals at two ends of the relay, because the input variable current signal and the output variable current signal can be used for reflecting a deformation state of a winding, a first state of the winding of the relay can be determined according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality, and the first state can reflect the deformation state of the winding, wherein if the winding has deformation, the winding is abnormal, and if the winding does not have deformation, the winding is normal.
203. When the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay;
further, the state of the relay may be determined by different winding states, wherein when the first state is winding abnormality, the offset of the winding abnormality may be determined by step 203, specifically, the offset of the winding abnormality is determined by using a voltage signal, a current signal of the relay and the signal acquisition times of the relay, and the deformation degree of the winding is determined by the offset. When the first state is that the winding is normal, the relay can be controlled to meet the opening and closing conditions, and the breaker can be controlled to perform corresponding opening and closing operations after the action conditions are met. For example, if the relay is a current relay, the circuit breaker is controlled to perform corresponding opening and closing operations when the current of the control circuit reaches a current condition; the relays are a current relay and an intermediate relay, and after the current of the control circuit reaches the current condition, the circuit breaker is controlled to perform corresponding opening and closing operations according to the delay condition of the intermediate relay, and after the delay condition is reached, which is not limited in this example.
204. And determining a second state of the winding of the relay according to the offset and the opening and closing action information of the relay, wherein the second state is used for reflecting the abnormal degree of the winding of the relay.
After the offset is obtained, it is further necessary to determine a second state of the winding of the relay in combination with the opening/closing operation information of the relay, where the second state is used to reflect the degree of abnormality of the winding of the relay. The opening and closing operation information includes, but is not limited to, the number of opening and closing operations and the operation data recorded at the time of opening and closing, such as the opening and closing operation time of each opening and closing operation. The abnormal degree of the winding is inversely proportional to the service life of the winding, and the higher the abnormal degree of the winding is, the shorter the service life of the winding is. The opening and closing action specifically refers to the opening action of the normally closed contact of the relay for opening or the closing action of the normally open contact for closing, and the opening and closing action information records the opening action and the closing action information.
The invention provides a method for determining the state of a relay winding, which comprises the following steps: receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module; determining a first state of a winding of the relay according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality; when the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay; and determining a second state of the winding of the relay according to the offset and the opening and closing action information of the relay, wherein the second state is used for reflecting the abnormal degree of the winding of the relay. Through the mode I, the abnormal offset of the winding can be determined by detecting the current and voltage conditions of the relay, the calculation precision is improved, the misjudgment of the state of the relay is avoided, the influence of the faulty operation of the relay on the normal action of the circuit breaker is avoided, the state of the relay with the abnormal winding is further determined, the use value of the relay can be improved to the maximum degree, and the operation and maintenance cost is reduced. And thirdly, the service cycle of the relay is visually evaluated, so that the operation and maintenance personnel can judge the health state of the relay according to the output result, and the operation and maintenance quality is improved.
Referring to fig. 3, fig. 3 is another flowchart of a method for determining a state of a relay winding according to an embodiment of the present invention, where the method shown in fig. 3 includes the following steps:
301. receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module;
302. determining a first state of a winding of the relay according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality;
it should be noted that the contents shown in step 301 and step 302 are similar to the contents of step 201 and step 202 of the method shown in fig. 2, and for avoiding repetition of this description, details of step 201 and step 202 of the method shown in fig. 2 may be specifically referred to.
In a possible implementation manner, step 302 may specifically determine the current signal deviation by using the input abrupt current signal and the output abrupt current signal; and determining a first state of a winding of the relay based on the current signal deviation.
The current signal deviation Δ i can be obtained by the following equation:
Δi＝i 1 -i 2
where Δ i is the current signal deviation, i 1 For inputting a sudden-change current signal, i 2 To output an abrupt current signal.
Exemplarily, when the current signal deviation is not 0, it indicates that the winding is deformed; when the current signal deviation is 0, the winding is not deformed.
303. When the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay;
it should be noted that the content shown in step 303 is similar to the content in step 203 of the method shown in fig. 2, and for avoiding repetition of this description, the content in step 203 of the method shown in fig. 2 may be specifically referred to.
In a feasible implementation, the voltage acquisition module and the current acquisition module mainly acquire the current and voltage signals of the input and output sides of the relay, the storage units in the voltage acquisition module and the current acquisition module perform rough storage on the current and voltage signals of the relay action at each time, then perform local fine matching on the basis of rough matching offset, select a certain magnitude of correlation coefficient to obtain the accurate offset of the relay winding, and further utilize the voltage signals and the current signals of the relay and the signal acquisition times of the relay in step 303 to determine the abnormal offset of the winding, which may include:
wherein, U is a voltage signal at two ends of the relay; i is a current signal at two ends of the relay; u shape S Is a reference voltage signal; i is S Is a reference current signal; f. of m Is the main offset; f. of n Is an auxiliary offset; beta is an offset; m and n are signal acquisition times. Wherein f is m It can also be understood as a coarse match offset; f. of n Also understood as a local fine match offset.
The StaMPS SBAS algorithm is applied to convert the current and voltage break variable signal into the relay winding deformation offset, so that the calculation precision is improved, and the influence on the normal work of the circuit breaker caused by misjudgment is avoided. Wherein, the StaMPS SBAS algorithm is a deformation analysis algorithm related to time sequence.
304. Determining a stability coefficient of a winding deformation quantity of the relay with the abnormal winding by using the opening and closing action times and the offset of each opening and closing action;
in order to further determine the health state of the winding, the stability coefficient of the winding deformation quantity of the abnormal relay can be determined by utilizing the opening and closing action times and the offset of each opening and closing action, and the stability coefficient can reflect the health state of the winding.
In a possible implementation, step 304 specifically includes the following algorithm:
wherein α is a stability coefficient; beta is a N The offset of each opening and closing action is used; n is the opening and closing action times of the relay, and N is a natural number, wherein N begins to be taken from the value 0.
By the aid of the algorithm, the offset of each opening and closing action can be integrated to obtain the stability coefficient of the winding deformation quantity reflecting the health state of the winding.
305. And determining a second state of the winding of the relay according to the stability coefficient and a preset stability coefficient threshold, wherein the second state is used for reflecting the abnormal degree of the winding of the relay.
It should be noted that obtaining the stability coefficient of the winding deformation amount can evaluate the abnormal degree of the abnormal winding. Wherein the second state comprises a continuous use state or a state to be replaced. Further, the second state of the winding of the relay may be determined by a stability factor and a preset stability factor threshold. Exemplarily, the stability coefficient threshold is a critical value, and when the stability coefficient is less than or equal to the stability coefficient threshold, the second state of the winding of the relay is determined to be a continuous use state; and when the stability coefficient is larger than the stability coefficient threshold value, determining that the second state of the winding of the relay is a state to be replaced. The second state of the deformation quantity of the relay winding is further judged by judging whether the winding of the relay has the first state of deformation, and the state of the relay winding is effectively monitored.
Exemplarily, the stability coefficient threshold value is 1, and when the stability coefficient α is less than or equal to 1, the second state of the winding of the relay is determined to be a continuous use state, that is, the deformation of the winding of the relay meets the daily operation requirement, and the relay does not need to be replaced with a new one; and when the stability coefficient alpha is larger than 1, determining that the second state of the winding of the relay is a state to be replaced, namely, indicating that the deformation of the winding of the relay can not meet the daily operation requirement, and recommending the immediate replacement of the relay.
In a feasible implementation mode, when the stability coefficient is larger than the stability coefficient threshold value, the abnormal degree of the winding is high, the winding needs to be replaced and cannot be used continuously, otherwise, the condition of operation rejection or misoperation is easy to occur, when the breaker meets the opening action condition at the moment, the voltage acquisition module and the current acquisition module are controlled to be in short circuit with the relay, the breaker is controlled to perform opening action again, and therefore the condition that the operation rejection or the misoperation occurs to the relay is avoided, and the opening action cannot be performed on time.
The invention provides a method for determining the state of a relay winding, which comprises the following steps: receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module; determining a first state of a winding of the relay according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality; when the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay; determining the stability coefficient of the winding deformation quantity of the relay with abnormal winding by using the opening and closing action times and the offset of each opening and closing action; and determining a second state of the winding of the relay according to the stability coefficient and a preset stability coefficient threshold, wherein the second state is used for reflecting the abnormal degree of the winding of the relay. The abnormal offset of the winding can be determined by detecting the current and voltage conditions of the relay, the state of the relay is judged to avoid the influence of the faulty operation of the relay on the normal action of the breaker, and the state of the relay with the abnormal winding is further determined to improve the use value of the relay to the maximum extent and reduce the operation and maintenance cost.
FIG. 4 is a diagram illustrating an internal structure of a computer device in one embodiment. The computer device may specifically be a terminal, and may also be a server. As shown in fig. 4, the computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program which, when executed by the processor, causes the processor to carry out the above method. The internal memory may also have stored therein a computer program which, when executed by the processor, causes the processor to perform the method described above. Those skilled in the art will appreciate that the architecture shown in fig. 4 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer device is proposed, comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the above-described method of determining the state of a relay winding.
In an embodiment, a computer-readable storage medium is proposed, in which a computer program is stored which, when being executed by a processor, causes the processor to carry out the steps of the above-mentioned method of determining the state of a relay winding.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by a computer program, which may be stored in a non-volatile computer readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus (Rambus) direct RAM (RDRAM), direct bused dynamic RAM (DRDRAM), and bused dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of determining a state of a relay winding, the method comprising:
receiving an input abrupt change quantity current signal of the relay acquired by an abrupt change quantity input module, an output abrupt change quantity current signal of the relay acquired by an abrupt change quantity output module, a voltage signal at two ends of the relay acquired by a voltage acquisition module and a current signal at two ends of the relay acquired by a current acquisition module;
determining a first state of a winding of the relay according to the input variable current signal and the output variable current signal, wherein the first state comprises winding abnormity or winding normality;
when the first state is winding abnormity, determining the abnormal offset of the winding by using the voltage signal and the current signal of the relay and the signal acquisition times of the relay;
and determining a second state of the winding of the relay according to the offset and the opening and closing action information of the relay, wherein the second state is used for reflecting the abnormal degree of the winding of the relay.
2. The method of claim 1, wherein the switching-on/off action information includes a number of switching-on/off actions of the relay, and the determining a second state of the winding of the relay according to the offset and the switching-on/off action information of the relay comprises:
determining a stability coefficient of a winding deformation quantity of the relay with the abnormal winding by using the opening and closing action times and the offset of each opening and closing action;
and determining a second state of the winding of the relay according to the stability coefficient and a preset stability coefficient threshold value.
3. The method of claim 2, wherein the second state comprises a continued use state or a replacement state, and the determining the second state of the winding of the relay according to the stability factor and a preset stability factor threshold comprises:
when the stability coefficient is smaller than or equal to the stability coefficient threshold value, determining that the second state of the winding of the relay is a continuous use state;
and when the stability coefficient is larger than the stability coefficient threshold value, determining that the second state of the winding of the relay is a state to be replaced.
4. The method of claim 1, wherein the determining the offset of the winding anomaly using the voltage signal, the current signal, and the number of signal acquisitions of the relay comprises:
wherein, U is a voltage signal at two ends of the relay; i is a current signal at two ends of the relay; u shape S Is a reference voltage signal; i is S Is a reference current signal; f. of m Is the main offset; f. of n Is an auxiliary offset; beta is an offset; m and n are signal acquisition times.
5. The method according to claim 2, wherein the determining the stability factor of the winding deformation quantity of the relay with the abnormal winding by using the number of times of the opening and closing operations and the offset of each opening and closing operation comprises:
wherein α is a stability coefficient; beta is a beta N The offset of each opening and closing action is shown; n is the opening and closing action times of the relay, and N is a natural number.
6. The method of claim 1, wherein determining a first state of a winding of the relay based on the input and output abrupt current signals comprises:
determining a current signal deviation by using the input and output abrupt change current signals;
determining a first state of a winding of the relay based on the current signal deviation.
7. The method of claim 3, further comprising:
when the stability coefficient is larger than the stability coefficient threshold value and the circuit breaker meets the opening action condition, the voltage acquisition module and the current acquisition module are controlled to be in short circuit with the relay and control the circuit breaker to perform opening action.
8. A system for determining the condition of a relay winding, the system comprising: the device comprises a sudden change input module, a sudden change output module, a current acquisition module, a voltage acquisition module, a fault detection module and a data display module;
one end of the sudden change input module is electrically connected with the input end of the relay, and the other end of the sudden change input module is electrically connected with the first end of the fault detection module;
one end of the sudden change output module is electrically connected with the output end of the relay, and the other end of the sudden change output module is electrically connected with the second end of the fault detection module;
one end of the current acquisition module is electrically connected with the input end of the relay, the other end of the current acquisition module is electrically connected with the third end of the fault detection module, one end of the voltage acquisition module is electrically connected with the output end of the relay, and the other end of the voltage acquisition module is electrically connected with the fourth end of the fault detection module;
the fifth end of the fault detection module is electrically connected with one end of the data display module;
the input module of the break variable is used for collecting the input break variable current signal of the relay and sending the input break variable current signal to the fault monitoring module;
the abrupt change output module is used for acquiring an output abrupt change current signal of the relay and sending the output abrupt change current signal to the fault monitoring module;
the current acquisition module is used for acquiring current signals at two ends of the relay and sending the current signals to the fault monitoring module;
the voltage acquisition module is used for acquiring voltage signals at two ends of the relay and sending the voltage signals to the fault monitoring module;
the fault detection module is used for executing the steps of the relay winding state determination method according to any one of claims 1 to 7 and sending input abrupt change current signals, output abrupt change current signals, voltage signals, current signals and opening and closing action information to the data display module;
the data display module is used for receiving the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information, and displaying the input abrupt change current signal, the output abrupt change current signal, the voltage signal, the current signal and the opening and closing action information to a preset display screen.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 7.
10. A computer device comprising a memory and a processor, characterized in that the memory stores a computer program which, when executed by the processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 7.
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