CN-122017545-A - Fault detection method and device of isolating switch and electronic equipment

CN122017545ACN 122017545 ACN122017545 ACN 122017545ACN-122017545-A

Abstract

The embodiment of the application provides a fault detection method and device for an isolating switch and electronic equipment, wherein the method comprises the steps of obtaining a current time relation diagram when the isolating switch changes in state, wherein the state change is switching-off or switching-on, the current time relation diagram represents the current change condition of the isolating switch when the isolating switch changes in state, determining a characteristic combination of the isolating switch according to the current time relation diagram, and determining one or more of the characteristic values in the characteristic combination, wherein the characteristic value represents the integral current change condition of the current of the isolating switch when the isolating switch changes in state, the current change condition of the isolating switch in a stationary period and time differences corresponding to different current change periods in the current time relation diagram, and determining the fault type of the isolating switch according to the characteristic value in the characteristic combination and a preset characteristic value. The method is used for achieving the effect of accurately and efficiently detecting the fault type of the isolating switch.

Inventors

ZHONG XIN
XIAO WEIQIANG
WANG XIANGDONG
ZHANG JIAN
GUO LEI
CHEN ZHENGRONG
CAI JIANFENG
DUAN YIQIANG
XIE XUCHEN
DENG YUEHUI
TIAN MINGMING
Wei Shanghui
CHEN WEIJUN

Assignees

广东电网有限责任公司惠州供电局

Dates

Publication Date: 20260512
Application Date: 20260109

Claims (10)

1. A fault detection method for an isolating switch, comprising: acquiring a current time relation diagram when the state of the isolating switch is changed, wherein the state change is switching off or switching on, and the current time relation diagram represents the current change condition of the isolating switch when the state of the isolating switch is changed; Determining a characteristic combination of the isolating switch according to the current time relation diagram, wherein characteristic values in the characteristic combination represent one or more of the overall current change condition of the current of the isolating switch when the state of the isolating switch is changed, the current change condition of the current of the isolating switch in a stationary period and time differences corresponding to different current change periods in the current time relation diagram; And determining the fault type of the isolating switch according to the characteristic value in the characteristic combination and a preset characteristic value, wherein the preset characteristic value is obtained when the isolating switch which works normally changes state.
2. The method of claim 1, wherein determining a combination of features of the isolation switch from the current-time relationship graph comprises: Determining a time set according to the current time relation diagram, wherein the time set comprises one or more of a first time, a second time, a third time and a fourth time, wherein the first time represents a current starting time in the current time relation diagram, the second time represents a time corresponding to a current when a current peak appears for the first time in the current time relation diagram, the third time represents a time corresponding to a current last time when the current peak appears in the current time relation diagram, and the fourth time represents a time corresponding to a current when the current disappears in the current time relation diagram; And determining the characteristic combination of the isolating switch according to the change condition of the current of the isolating switch between different moments in the moment set and/or according to the time differences corresponding to different current change periods in the current time relation diagram.
3. The method of claim 2, wherein the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value, and a fifth feature value; The first characteristic value is an integral value of current of the isolating switch in a first moment to a fourth moment, the second characteristic value is an average value of current of the isolating switch in a second moment to a fourth moment, the third characteristic value is a time difference between the second moment and the third moment, the fourth characteristic value is a time difference between the first moment and the second moment, and the fifth characteristic value is a time difference between the third moment and the fourth moment.
4. The method of claim 1, wherein determining the type of fault of the disconnector based on the characteristic value in the characteristic combination and a preset characteristic value comprises: Determining a parameter value corresponding to each characteristic value in the characteristic combination according to the characteristic value and a preset characteristic value corresponding to the characteristic value, wherein the parameter value represents the fault condition of the isolating switch; and determining the fault type of the isolating switch according to at least two parameter values.
5. The method of claim 4, wherein the parameter value corresponding to the i-th feature value is ; Wherein, the For the i-th characteristic value, And i is a positive integer greater than or equal to 1, which is a preset characteristic value corresponding to the ith characteristic value.
6. The method of claim 4, wherein determining the type of fault of the disconnector based on at least two parameter values comprises: If the parameter value corresponding to the first characteristic value is smaller than a first preset threshold value, and the parameter value corresponding to the fourth characteristic value is smaller than a second preset threshold value and larger than a third preset threshold value, judging that the fault type of the isolating switch is a slight jamming fault type; if the parameter value corresponding to the first characteristic value is larger than a first preset threshold value, the parameter value corresponding to the second characteristic value is smaller than a fourth preset threshold value, and the parameter value corresponding to the third characteristic value is smaller than a fifth preset threshold value, judging that the fault type of the isolating switch is a moderate jamming fault type.
7. The method of claim 4, wherein determining the type of fault of the disconnector based on at least two parameter values comprises: If the parameter value corresponding to the first characteristic value is larger than a first preset threshold value, the parameter value corresponding to the second characteristic value is smaller than a fourth preset threshold value, the parameter value corresponding to the third characteristic value is larger than a fifth preset threshold value, and the parameter value corresponding to the fourth characteristic value is larger than a sixth preset threshold value, judging that the fault type of the isolating switch is a serious jamming fault type; If the parameter value corresponding to the first characteristic value is larger than a first preset threshold value, the parameter value corresponding to the second characteristic value is smaller than a fourth preset threshold value, the parameter value corresponding to the third characteristic value is larger than a fifth preset threshold value, the parameter value corresponding to the fourth characteristic value is smaller than a sixth preset threshold value, and the parameter value corresponding to the fifth characteristic value is larger than the sixth preset threshold value, judging that the fault type of the isolating switch is a fault type of a limiting device.
8. The method according to any one of claims 1-7, further comprising: generating and sending out alarm information according to the fault type, wherein the fault type is indicated in the alarm information.
9. A fault detection device for an isolating switch, comprising: the system comprises an acquisition module, a switching-off module and a switching-on module, wherein the acquisition module is used for acquiring a current time relation diagram when the state of the isolating switch is changed, the state change is switching-off or switching-on, and the current time relation diagram represents the current change condition of the isolating switch when the state of the isolating switch is changed; The first determining module is used for determining the characteristic combination of the isolating switch according to the current time relation diagram, wherein the characteristic value in the characteristic combination represents one or more of the integral current change condition of the current of the isolating switch when the state of the isolating switch is changed, the current change condition of the current of the isolating switch in a stationary phase and the time difference corresponding to different current change periods in the current time relation diagram; And the second confirmation module is used for determining the fault type of the isolating switch according to the characteristic value in the characteristic combination and a preset characteristic value, wherein the preset characteristic value is the characteristic value obtained when the isolating switch which normally works changes state.
10. An electronic device is characterized by comprising a memory and a processor; The memory stores computer-executable instructions; The processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of any one of claims 1-8.

Description

Fault detection method and device of isolating switch and electronic equipment Technical Field The present application relates to the field of isolating switches, and in particular, to a fault detection method and apparatus for an isolating switch, and an electronic device. Background An isolating switch is an electrical device, and is mainly used for isolating and breaking a circuit in an electrical system. When the isolating switch fails, especially mechanical faults such as jamming and the like, the operation of the electrical system can be seriously influenced. In the prior art, a current signal of an isolating switch in a preset time period is obtained, and the signal is sequentially subjected to filtering, hilbert transform, amplitude extraction and standard deviation processing to obtain a standard deviation sequence of the current signal. And then, judging the fault type of the isolating switch by comparing the standard deviation sequence with a preset threshold value. However, this method is complex in operation, resulting in low failure detection accuracy and low efficiency. Therefore, a method for accurately and efficiently detecting the fault type of the isolating switch is needed. Disclosure of Invention The embodiment of the application provides a fault detection method and device of an isolating switch and electronic equipment, which are used for achieving the effect of accurately and efficiently detecting the fault type of the isolating switch. In a first aspect, an embodiment of the present application provides a fault detection method for an isolating switch, including: acquiring a current time relation diagram when the state of the isolating switch is changed, wherein the state change is switching off or switching on, and the current time relation diagram represents the current change condition of the isolating switch when the state of the isolating switch is changed; Determining a characteristic combination of the isolating switch according to the current time relation diagram, wherein characteristic values in the characteristic combination represent one or more of the overall current change condition of the current of the isolating switch when the state of the isolating switch is changed, the current change condition of the current of the isolating switch in a stationary period and time differences corresponding to different current change periods in the current time relation diagram; And determining the fault type of the isolating switch according to the characteristic value in the characteristic combination and a preset characteristic value, wherein the preset characteristic value is obtained when the isolating switch which works normally changes state. In one possible implementation manner, determining the feature combination of the isolating switch according to the current time relation diagram includes: Determining a time set according to the current time relation diagram, wherein the time set comprises one or more of a first time, a second time, a third time and a fourth time, wherein the first time represents a current starting time in the current time relation diagram, the second time represents a time corresponding to a current when a current peak appears for the first time in the current time relation diagram, the third time represents a time corresponding to a current last time when the current peak appears in the current time relation diagram, and the fourth time represents a time corresponding to a current when the current disappears in the current time relation diagram; And determining the characteristic combination of the isolating switch according to the change condition of the current of the isolating switch between different moments in the moment set and/or according to the time differences corresponding to different current change periods in the current time relation diagram. In a possible implementation manner, the feature combination includes a first feature value, a second feature value, a third feature value, a fourth feature value and a fifth feature value; The first characteristic value is an integral value of current of the isolating switch in a first moment to a fourth moment, the second characteristic value is an average value of current of the isolating switch in a second moment to a fourth moment, the third characteristic value is a time difference between the second moment and the third moment, the fourth characteristic value is a time difference between the first moment and the second moment, and the fifth characteristic value is a time difference between the third moment and the fourth moment. In one possible implementation manner, determining the fault type of the isolating switch according to the characteristic value in the characteristic combination and the preset characteristic value includes: Determining a parameter value corresponding to each characteristic value in the characteristic combination according to the characteristic value and a preset c