阅读说明：本技术 高压隔离开关角位移检测系统及其检测方法 (Angular displacement detection system and detection method for high-voltage isolating switch ) 是由 王嘉易 许京遥 *** 杜继伟 庄先涛 李月 丁澄 袁霞 于 2019-08-29 设计创作，主要内容包括：发明公开了一种高压隔离开关角位移检测系统及其检测方法。该检测系统包括角位移传感器,信号调理电路和控制器：用于将数字信号按设定比例缩小后通过无线通信模块将其和定位模块采集的位置信息发送至数据处理终端；数据处理终端,用于将数字信号转换为角位移,然后结合位置信息绘制并角位移随时间变化的曲线,并对当次曲线进行特征量提取；然后将特征量和当次曲线终点对应的角位移与正常状态下对应的特征量和角位移分别相比较得到两者的差值；当两个特征量之间的差值大于设定阀值时,判定高压隔离开关的操作机构存在异常；当两个角位移之间的差值绝对值大于设定阀值时,判定分合闸不到位；然后显示曲线和判定结果。(The invention discloses an angular displacement detection system and method for a high-voltage isolating switch. The detection system comprises an angular displacement sensor, a signal conditioning circuit and a controller: the wireless communication module is used for sending the digital signals and the position information acquired by the positioning module to the data processing terminal after the digital signals are reduced according to a set proportion; the data processing terminal is used for converting the digital signal into angular displacement, then drawing a curve of the angular displacement along with time by combining position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement corresponding to the current curve end point in a normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than a set threshold value, judging that an operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than a set threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.)

1. The angular displacement detection system of the high-voltage isolating switch is characterized by comprising a support frame (7), a power supply module for supplying power and a first support shaft (2) fixedly connected with a rotating main shaft (1) of the high-voltage isolating switch, wherein a driving wheel (3) is arranged on the first support shaft (2); the supporting frame (7) is connected with a second supporting shaft (9) through two bearings (5) and a bearing seat (6), a driven wheel (4) meshed with the driving wheel (3) is installed on the second supporting shaft (9) between the two bearings (5), the diameter of the driven wheel (4) is smaller than that of the driving wheel (3), an angular displacement sensor (8) used for detecting the angular displacement of the second supporting shaft (9) is installed on the supporting frame (7), the output end of the angular displacement sensor (8) is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;

the signal conditioning circuit is used for converting an analog signal acquired by the angular displacement sensor (8) into a digital signal;

the controller is used for reducing the digital signal according to a set proportion and then sending the reduced digital signal and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;

the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating main shaft, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.

2. The angular displacement detection system of a high-voltage disconnector according to claim 1, characterized in that the angular displacement sensor (8) is a potentiometer.

3. The system for detecting angular displacement of high-voltage disconnecting switch according to claim 1, wherein the wireless communication module is a Zigbee module.

4. The angular displacement detection system of the high-voltage isolating switch according to claim 1, wherein the transmission ratio of the driving wheel (3) to the driven wheel is 3.6: 1.

5. The angular displacement detection system of a high-voltage disconnector according to claim 1, characterized in that the support frame (7) is provided with a mounting bracket for mounting on a utility pole.

6. The angular displacement detection system of a high-voltage isolating switch according to any one of claims 1 to 5, wherein the characteristic quantity extraction of the current secondary curve further comprises:

and calculating the mean value and the amplitude value between all adjacent two points of the current curve to obtain a plurality of groups of mean values and amplitude values, comparing the mean value and the amplitude value of each group, and if the mean value and the amplitude value are the same, adding 1 to the number, and taking the number as the characteristic quantity.

7. A method for detecting an angular displacement detection system of a high voltage isolation switch as claimed in any one of claims 1 to 6, comprising:

s1, the angular displacement sensor (8) collects an analog signal and sends the analog signal to the signal conditioning circuit, and the signal conditioning circuit converts the received analog signal into a digital signal and sends the digital signal to the controller;

s2, the controller reduces the digital signal according to a set proportion and then sends the reduced digital signal and the position information acquired by the positioning module to a data processing terminal through the wireless communication module;

s3, converting the reduced digital signal into angular displacement on a rotating main shaft by the data processing terminal, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.

Technical Field

The invention relates to the field of electricity, in particular to an angular displacement detection system and a detection method for a high-voltage isolating switch.

Background

With the development of power grids, higher requirements are put on equipment reliability. As the electrical equipment with the largest use amount, namely the high-voltage isolating switch, the operation condition of the high-voltage isolating switch is directly related to the safety of a power grid. The reliability of a high voltage disconnector depends to a large extent on the reliability of its mechanical operating system.

The main function of the high-voltage isolating switch in the power grid is to establish a reliable insulating gap to separate the equipment or line to be overhauled from the power supply by an obvious disconnection point so as to ensure the safety of the overhauler and the equipment. Therefore, whether the opening and closing of the high-voltage isolating switch are in place or not is decisive for whether the insulation gap established by the high-voltage isolating switch is reliable or not.

However, at present, whether the high-voltage isolating switch is switched on or off in place is generally indicated qualitatively by a switching-on and switching-off indication board configured for the high-voltage isolating switch, so that the degree of switching on or off cannot be judged accurately. If the travel is insufficient or the disconnecting switch is not disconnected during the disconnecting process of the disconnecting link, great danger is brought to the operation and maintenance work.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a high-voltage isolating switch angular displacement detection system and a detection method thereof, which can reflect the opening and closing degree of a high-voltage isolating switch.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that:

the angular displacement detection system of the high-voltage isolating switch comprises a support frame, a power supply module for supplying power and a first support shaft fixedly connected with a rotating main shaft of the high-voltage isolating switch, wherein a driving wheel is arranged on the first support shaft; the supporting frame is connected with a second supporting shaft through two bearings and a bearing seat, a driven wheel meshed with the driving wheel is arranged on the second supporting shaft between the two bearings, the diameter of the driven wheel is smaller than that of the driving wheel, an angular displacement sensor used for detecting the angular displacement of the second supporting shaft is arranged on the supporting frame, the output end of the angular displacement sensor is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;

the signal conditioning circuit is used for converting the analog signals acquired by the angular displacement sensor into digital signals;

the controller is used for reducing the digital signal according to a set proportion and then sending the reduced digital signal and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;

the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating main shaft, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.

Further, the angular displacement sensor is a potentiometer.

Further, the wireless communication module is a Zigbee module.

Furthermore, the transmission ratio of the driving wheel to the driven wheel is 3.6: 1.

Further, the support frame is provided with a mounting rack used for being mounted on the telegraph pole.

Further, the extracting the feature quantity of the current-order curve further comprises:

and calculating the mean value and the amplitude value between all adjacent two points of the current curve to obtain a plurality of groups of mean values and amplitude values, comparing the mean value and the amplitude value of each group, and if the mean value and the amplitude value are the same, adding 1 to the number to serve as the characteristic quantity.

On the other hand, a detection method of the angular displacement detection system of the high-voltage isolating switch designed by the scheme is provided, and the detection method comprises the following steps:

s1, the angular displacement sensor collects analog signals and sends the analog signals to the signal conditioning circuit, and the signal conditioning circuit converts the received analog signals into digital signals and sends the digital signals to the controller;

s2, the controller reduces the digital signal according to the set proportion and then sends the reduced digital signal and the position information collected by the positioning module to the data processing terminal through the wireless communication module;

s3, converting the reduced digital signal into angular displacement on a rotating main shaft by the data processing terminal, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.

The invention has the beneficial effects that:

because the first supporting shaft is fixedly connected with the rotating main shaft and the driving wheel is in key connection with the first supporting shaft, the rotating main shaft rotates to drive the supporting shaft and the driving wheel to synchronously rotate (the angular speeds are the same). The driving wheel rotates to drive the driven wheel to synchronously rotate (the linear velocity is the same), and the angular velocity of the driven wheel is in direct proportion to that of the driving wheel because the diameter of the driven wheel is smaller than that of the driving wheel. The driven wheel rotates to drive the second support shaft to rotate synchronously (the angular speed is the same), so that the angular displacement of the rotating main shaft is amplified, and the detection precision of the system is improved.

Meanwhile, the data processing terminal displays the curve and the judgment result (whether the opening and closing operation is in place or not and whether the operating mechanism is abnormal or not), so that a worker can directly obtain the conclusion that whether the opening and closing operation is in place or not and whether the operating mechanism is abnormal or not, the layered degree of the opening and closing operation can be known through the curve, and the rotation working condition of the rotating main shaft can be visually observed, so that the worker can easily find possible faults (such as jamming) of the high-voltage isolating switch operating mechanism, the maintenance is accurately carried out, and the service life of the high-voltage isolating switch is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of an angular displacement detection system of a high-voltage disconnecting switch in an embodiment when applied.

Wherein, 1, rotating the main shaft; 2. a first support shaft; 3. a driving wheel; 4. a driven wheel; 5. a bearing; 6. a bearing seat; 7. a support frame; 8. an angular displacement sensor (8); 9. a second support shaft.

Detailed Description

The following detailed description of the present invention will be provided in conjunction with the accompanying drawings to facilitate the understanding of the present invention by those skilled in the art. It should be understood that the embodiments described below are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step, without departing from the spirit and scope of the present invention as defined and defined by the appended claims, fall within the scope of protection of the present invention.

As shown in fig. 1, the angular displacement detection system of the high-voltage isolating switch comprises a support frame 7, a power supply module for supplying power and a first support shaft 2 for being fixedly connected with a rotating main shaft 1 of the high-voltage isolating switch, wherein a driving wheel 3 is arranged on the first support shaft 2; the supporting frame 7 is connected with a second supporting shaft 9 through two bearings 5 and a bearing seat 6, a driven wheel 4 meshed with the driving wheel 3 is installed on the second supporting shaft 9 positioned between the two bearings 5, the diameter of the driven wheel 4 is smaller than that of the driving wheel 3, an angular displacement sensor 8 used for detecting the angular displacement of the second supporting shaft 9 is installed on the supporting frame 7, the output end of the angular displacement sensor 8 is connected with a signal conditioning circuit, the signal conditioning circuit is connected with a controller, the controller is respectively connected with a positioning module and a wireless communication module, and the wireless communication module is connected with a data processing terminal;

the signal conditioning circuit is used for converting the analog signal acquired by the angular displacement sensor 8 into a digital signal;

the controller is used for reducing the digital signal according to a set proportion and then sending the reduced digital signal and the position information acquired by the positioning module to the data processing terminal through the wireless communication module;

the data processing terminal is used for converting the reduced digital signals into angular displacement on the rotating main shaft, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.

In implementation, the present scheme preferably performs the feature extraction on the secondary curve, and further includes:

and calculating the mean value and the amplitude value between all adjacent two points of the current curve to obtain a plurality of groups of mean values and amplitude values, comparing the mean value and the amplitude value of each group, and if the mean value and the amplitude value are the same, adding 1 to the number to serve as the characteristic quantity. So as to find the phenomenon of jamming of the operating mechanism. Thereby performing maintenance.

And the data processing terminal displays the abnormal degree according to the difference value between the two characteristic quantities when displaying whether the operating mechanism is abnormal. The larger the difference between the two characteristic quantities is, the more serious the jamming phenomenon is, so that the worker can conveniently and timely overhaul the fault and avoid serious faults or safety accidents.

As shown in fig. 1, in application, the support frame 7 is fixedly mounted on the ground, and the angular displacement sensor 8 is a potentiometer. The wireless communication module is a Zigbee module, so that the data processing terminal can simultaneously receive signals transmitted by more than 50 signal conditioning circuits.

Wherein, the transmission ratio of the driving wheel 3 to the driven wheel is 3.6: 1. Because the rotating main shaft 1 rotates 90 degrees in opening and closing processes, the angular displacement can be amplified by 3.6 times (the maximum angular displacement does not exceed 324 degrees) through the arrangement, and the value detected by the angular displacement sensor 8 has a unique corresponding relation with the angle formed by opening and closing processes while the angular displacement sensor amplifies the angular displacement.

In another embodiment, the support frame 7 is provided with a mounting rack for mounting on a utility pole to reduce the installation procedure of the angular displacement detection system of the high-voltage disconnecting switch.

The detection method of the angular displacement detection system of the high-voltage isolating switch designed by the scheme comprises the following steps:

s1, the angular displacement sensor 8 collects an analog signal and sends the analog signal to the signal conditioning circuit, and the signal conditioning circuit converts the received analog signal into a digital signal and sends the digital signal to the controller;

s2, the controller reduces the digital signal according to the set proportion and then sends the reduced digital signal and the position information collected by the positioning module to the data processing terminal through the wireless communication module;

s3, converting the reduced digital signal into angular displacement on a rotating main shaft by the data processing terminal, then drawing and displaying curves of the angular displacement of the rotating main shaft at different positions along with time according to position information, and extracting characteristic quantity of the current curve; then comparing the angular displacement corresponding to the characteristic quantity and the current curve end point with the characteristic quantity and the angular displacement which are stored in the data processing terminal and correspond to the normal state respectively to obtain a difference value of the characteristic quantity and the angular displacement; when the difference value between the two characteristic quantities is larger than the corresponding set characteristic quantity threshold value, judging that the operating mechanism of the high-voltage isolating switch is abnormal; when the absolute value of the difference value between the two angular displacements is larger than the corresponding set angular displacement threshold value, judging that the opening and closing are not in place; the curve and the decision result are then displayed.