CN216747956U - Substation partial discharge diagnostic system - Google Patents
Substation partial discharge diagnostic system Download PDFInfo
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- CN216747956U CN216747956U CN202220091913.9U CN202220091913U CN216747956U CN 216747956 U CN216747956 U CN 216747956U CN 202220091913 U CN202220091913 U CN 202220091913U CN 216747956 U CN216747956 U CN 216747956U
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Abstract
The utility model relates to a substation partial discharge diagnosis system which comprises a first UHF sensor, a second UHF sensor, a third UHF sensor, a first IEV/AE sensor, a first HFCT sensor, a TEV/AE receiving terminal and an online monitoring server, wherein the first UHF sensor is connected with the second UHF sensor; the first UHF sensor, the first IEV/AE sensor and the first HFCT sensor are respectively connected with the main transformer, the output ends of the first UHF sensor and the first HFCT sensor are respectively connected with the online monitoring server, and the output end of the first IEV/AE sensor is connected with the TEV/AE receiving terminal; the second UHF sensor is connected with the cable, and the output end of the second UHF sensor is connected with the online monitoring server; the third UHF sensor is connected with the circuit breaker, and the output end of the third UHF sensor is connected with the online monitoring server. The internal partial discharge signal of the high-voltage equipment is monitored by the aid of the negative sense, and is output to the online detection server for centralized analysis, display and warning output, so that the running state of the equipment is monitored and evaluated, and sudden accidents of the high-voltage equipment are effectively avoided.
Description
Technical Field
The utility model relates to the technical field of partial discharge monitoring, in particular to a partial discharge diagnosis system for a substation.
Background
High-voltage equipment such as a power transformer, an isolating switch, an isolating disconnecting link, a circuit breaker, a current transformer, a voltage transformer, a cable and the like are used as main component equipment in a power system, and the reliability of the high-voltage equipment is the key of power generation and power transmission benefits. Continuous supervision is crucial to assessing the operational efficiency and safe operating conditions of the substation.
Insulators, metal bodies and the like in high-voltage equipment often have sharp corners and burrs, so that electric charges are concentrated at the sharp corners or the burrs under the action of the electric field intensity, and partial discharge of a transformer is caused. In addition, when the main insulator in the equipment body, the joint or the terminal has impurities such as cavities, bubbles, impurities and the like, the impurity capacitor is equivalently arranged in the main insulator, the impurity capacitor can be charged under the condition that the cable core passes through high-voltage alternating current, and when the voltage reaches the breakdown voltage of a medium, the impurity capacitor is subjected to breakdown discharge once. The main insulation is carbonized by the generated heat, and becomes thinner and thinner continuously after long-term carbonization, so that the main insulation is easily broken down to cause a ground fault.
Therefore, it is very important to monitor partial discharge on line to determine insulation abnormality, and it is also very necessary to take preventive measures in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to monitor and analyze partial discharge signals in high-voltage equipment of a substation, evaluate the running state of the equipment, effectively avoid sudden accidents of the high-voltage equipment and provide a partial discharge diagnosis system of the substation.
In order to achieve the purpose of the utility model, the embodiment of the utility model provides the following technical solutions:
a partial discharge diagnosis system for a substation carries out partial discharge diagnosis on a main transformer, a cable and a circuit breaker, and comprises a first UHF sensor, a second UHF sensor, a third UHF sensor, a first IEV/AE sensor, a first HFCT sensor, a TEV/AE receiving terminal and an online monitoring server;
the first UHF sensor, the first IEV/AE sensor and the first HFCT sensor are respectively connected with the main transformer, the output ends of the first UHF sensor and the first HFCT sensor are respectively connected with the online monitoring server, and the output end of the first IEV/AE sensor is connected with the TEV/AE receiving terminal;
the second UHF sensor is connected with the cable, and the output end of the second UHF sensor is connected with the online monitoring server;
the third UHF sensor is connected with the circuit breaker, and the output end of the third UHF sensor is connected with the online monitoring server.
Furthermore, partial discharge diagnosis is carried out on the current transformer and the voltage transformer, and the diagnosis system further comprises a fourth UHF sensor, a fifth UHF sensor, a second HFCT sensor and a third HFCT sensor;
the fourth UHF sensor and the second HFCT sensor are respectively connected with the current transformer, and the output ends of the fourth UHF sensor and the second HFCT sensor are respectively connected with the online monitoring server;
and the output ends of the fifth UHF sensor and the third HFCT sensor are respectively connected with an online monitoring server.
Furthermore, the diagnosis system also comprises a sixth UHF sensor and an infrared imager, wherein the sixth UHF sensor and the infrared imager are respectively connected with the isolation switch, and the output ends of the sixth UHF sensor and the infrared imager are connected with the online monitoring server.
In another embodiment, the partial discharge diagnosis is further performed on the isolation switch, the diagnosis system further comprises a sixth UHF sensor and a temperature measurement watchband, the sixth UHF sensor and the temperature measurement watchband are respectively connected with the isolation switch, and output ends of the sixth UHF sensor and the temperature measurement watchband are connected with the online monitoring server.
Furthermore, partial discharge diagnosis is carried out on the isolating switch, and the diagnosis system further comprises a fourth HFCT sensor and an IED concentrator, wherein the fourth HFCT sensor is connected with the isolating switch, the output end of the fourth HFCT sensor is connected with the IED concentrator, and the output end of the IED concentrator is connected with the online monitoring server.
Furthermore, the diagnosis system also comprises a seventh UHF sensor and a second IEV/AE sensor, wherein the seventh UHF sensor and the second IEV/AE sensor are respectively connected with the indoor pressure, the output end of the seventh UHF sensor is connected with the online monitoring server, and the output end of the second IEV/AE sensor is connected with the TEV/AE receiving terminal.
Furthermore, the diagnosis is still put to equipment partially, diagnostic system still includes wireless temperature sensor, wireless temperature and assembles the terminal, wireless temperature sensor sets up in the outside of equipment, and wireless temperature sensor's output and wireless temperature assemble terminal connection, and wireless temperature assembles the output and the on-line monitoring server connection at terminal.
Compared with the prior art, the utility model has the beneficial effects that:
the diagnosis system monitors and analyzes partial discharge signals in high-voltage equipment of the substation, and the collected signals are output to the online detection server for centralized analysis, display and output warning after being processed through filtering, amplification and the like, so that the running state of the equipment is monitored and evaluated, and sudden accidents of the high-voltage equipment are effectively avoided. The UHF ultrahigh frequency sensor signal detection technology, the HFCT detection signal processing technology, the TEV/AE two-in-one ultrasonic and earth electric wave signal technology and the like are adopted to assist in monitoring the partial discharge. The method is widely applied to reliability monitoring and diagnosis of high-voltage equipment such as a main transformer, a cable, a circuit breaker, a current transformer and the like, and realizes the digital overhaul of a substation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of a diagnostic system 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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or implying any actual relationship or order between such entities or operations.
Example (b):
the utility model is realized by the following technical scheme, and the diagnosis system for the partial discharge of the substation carries out partial discharge diagnosis on a main transformer, a cable, a circuit breaker, a current transformer, a voltage transformer, an isolation switch, indoor voltage interaction, equipment and the like, and please refer to fig. 1.
The diagnosis system monitors and analyzes partial discharge signals in high-voltage equipment of the substation, and the collected signals are output to the online detection server for centralized analysis, display and output warning after being processed through filtering, amplification and the like, so that the running state of the equipment is monitored and evaluated, and sudden accidents of the high-voltage equipment are effectively avoided. The UHF ultrahigh frequency sensor signal detection technology, the HFCT detection signal processing technology, the TEV/AE two-in-one ultrasonic and earth electric wave signal technology and the like are adopted to assist in monitoring the partial discharge. The method is widely applied to reliability monitoring and diagnosis of high-voltage equipment such as a main transformer, a cable, a circuit breaker, a current transformer and the like, and realizes the digital overhaul of a substation.
Referring to fig. 1, the first UHF sensor, the first IEV/AE sensor, and the first HFCT sensor are respectively connected to the main transformer, output ends of the first UHF sensor and the first HFCT sensor are respectively connected to the online monitoring server, and an output end of the first IEV/AE sensor is connected to the TEV/AE receiving terminal. The method comprises the steps that partial discharge data of a main transformer are actively reported to an online monitoring server by using an ultrahigh frequency (UHF) method, but UHF cannot position whether a 1# transformer or a 2# transformer occurs partial discharge, so that an HFCT detection signal is used for assisting monitoring, an IEV/AE two-in-one sensor is used for positioning the partial discharge, and the magnitude of partial discharge energy can be reported.
The IEV/AE sensor is a transient earth electric wave (TEV) and ultrasonic wave (AE) two-in-one sensor which is installed in a magnetic attraction mode. After receiving ultrasonic wave or transient earth electric wave signals generated by the partial discharge, the signals are uploaded to a TEV/AE receiving terminal through wireless signals and then are uploaded to an online monitoring server through the Ethernet.
The second UHF sensor is connected with the cable, and the output end of the second UHF sensor is connected with the online monitoring server. The cable partial discharge phenomenon has great harmful effect on the insulation of the cable and the transmission of electric energy, and when partial discharge occurs inside the cable, due to the fact that the insulating strength of the external insulating protective layer is high, the rising edge of partial discharge electric pulse is steep, the pulse width is mostly nanosecond level, and ultrahigh frequency electromagnetic signals above 1GHz can be excited. Therefore, the ultrahigh frequency current method UHF realizes partial discharge detection by installing a second UHF sensor at the flange joint of the GIS basin-type insulator or on the cable outer protective layer, and then uploads the partial discharge detection to the online monitoring server.
The third UHF sensor is connected with the circuit breaker, and the output end of the third UHF sensor is connected with the online monitoring server. The UHF sensor can detect ultrahigh frequency electromagnetic wave (300 MHz-3000 MHz) signals generated when the circuit breaker is subjected to partial discharge, and on-site corona interference is mainly concentrated below a 300MHz frequency band, so that UHF can effectively avoid on-site corona interference, has high sensitivity and anti-interference capability, and can realize circuit breaker partial discharge live detection, positioning, defect type identification and the like.
And the output ends of the fourth UHF sensor and the second HFCT sensor are respectively connected with the online monitoring server. And the output ends of the fifth UHF sensor and the third HFCT sensor are respectively connected with an online monitoring server.
And the sixth UHF sensor and the infrared imager are respectively connected with the isolation switch, and the output ends of the sixth UHF sensor and the infrared imager are connected with the online monitoring server. When the isolation switch is in partial discharge, the area of temperature rise is large, so that the infrared imager is used for monitoring in real time, and temperature measurement data are uploaded to the online monitoring server. As another possible implementation mode, the temperature measuring watchband can also be sleeved outside the isolation disconnecting link to detect the temperature, and the temperature measuring data is uploaded to the online monitoring server.
The fourth HFCT sensor is connected with the isolating switch, the output end of the fourth HFCT sensor is connected with the IED concentrator, and the output end of the IED concentrator is connected with the online monitoring server. The isolation switch partial discharge is detected by the HFCT sensors, a fourth HFCT sensor can be arranged at each isolation switch, and finally the fourth HFCT sensor is uploaded to the online monitoring server through the IED concentrator in a unified mode.
The seventh UHF sensor and the second IEV/AE sensor are respectively connected with indoor pressure, the output end of the seventh UHF sensor is connected with the online monitoring server, and the output end of the second IEV/AE sensor is connected with the TEV/AE receiving terminal. The grounding of the indoor pressure mutual is realized through external grounding, a second IEV/AE sensor is installed at an endoscopic hole of the pressure mutual for monitoring, and transient earth electric waves or ultrasonic waves acquired by the second IEV/AE sensor are uploaded to an online monitoring server through a TEV/AE receiving terminal.
The wireless temperature sensor is arranged outside the equipment, the output end of the wireless temperature sensor is connected with the wireless temperature convergence terminal, and the output end of the wireless temperature convergence terminal is connected with the online monitoring server. The equipment refers to various electrical equipment in a power substation, such as switch cabinet equipment, cable connectors and other live equipment. The wireless collection temperature measurement online monitoring is a set of electric temperature measurement system for monitoring the temperature of a part which is easy to generate heat and difficult to detect when an electrical device runs in real time. The system mainly comprises a wireless temperature convergence terminal and a wireless temperature measurement sensor, adopts a short-range wireless network mode, and a plurality of wireless temperature measurement contacts are distributed around the wireless temperature convergence terminal, so that the temperature measurement terminals can be added, deleted and moved at will in an effective communication range. The wireless temperature convergence terminal is installed in the peripheral area of the wireless temperature sensor, and the plurality of wireless temperature sensors finish on-site temperature acquisition and are used for measuring the surface temperature of charged objects such as buses, switch cabinet contacts, cable joints and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a diagnostic system is put in transformer substation office, carries out the diagnosis is put in office to main transformer, cable, circuit breaker, its characterized in that: the system comprises a first UHF sensor, a second UHF sensor, a third UHF sensor, a first IEV/AE sensor, a first HFCT sensor, a TEV/AE receiving terminal and an online monitoring server;
the first UHF sensor, the first IEV/AE sensor and the first HFCT sensor are respectively connected with the main transformer, the output ends of the first UHF sensor and the first HFCT sensor are respectively connected with the online monitoring server, and the output end of the first IEV/AE sensor is connected with the TEV/AE receiving terminal;
the second UHF sensor is connected with the cable, and the output end of the second UHF sensor is connected with the online monitoring server;
the third UHF sensor is connected with the circuit breaker, and the output end of the third UHF sensor is connected with the online monitoring server.
2. A substation partial discharge diagnostic system according to claim 1, characterized in that: the diagnosis system also carries out partial discharge diagnosis on the current transformer and the voltage transformer, and also comprises a fourth UHF sensor, a fifth UHF sensor, a second HFCT sensor and a third HFCT sensor;
the fourth UHF sensor and the second HFCT sensor are respectively connected with the current transformer, and the output ends of the fourth UHF sensor and the second HFCT sensor are respectively connected with the online monitoring server;
and the output ends of the fifth UHF sensor and the third HFCT sensor are respectively connected with an online monitoring server.
3. A substation partial discharge diagnostic system according to claim 1, characterized in that: the diagnosis system also comprises a sixth UHF sensor and an infrared imager, wherein the sixth UHF sensor and the infrared imager are respectively connected with the isolation switch, and the output ends of the sixth UHF sensor and the infrared imager are connected with the online monitoring server.
4. A substation partial discharge diagnostic system according to claim 1, characterized in that: the diagnosis system also comprises a sixth UHF sensor and a temperature measurement watchband, wherein the sixth UHF sensor and the temperature measurement watchband are respectively connected with the isolation switch, and the output ends of the sixth UHF sensor and the temperature measurement watchband are connected with the online monitoring server.
5. A substation partial discharge diagnostic system according to claim 1, characterized in that: the diagnosis system also comprises a fourth HFCT sensor and an IED concentrator, wherein the fourth HFCT sensor is connected with the isolating switch, the output end of the fourth HFCT sensor is connected with the IED concentrator, and the output end of the IED concentrator is connected with the online monitoring server.
6. A substation partial discharge diagnostic system according to claim 1, characterized in that: the diagnosis system also comprises a seventh UHF sensor and a second IEV/AE sensor, wherein the seventh UHF sensor and the second IEV/AE sensor are respectively connected with the indoor pressure, the output end of the seventh UHF sensor is connected with the online monitoring server, and the output end of the second IEV/AE sensor is connected with the TEV/AE receiving terminal.
7. A substation partial discharge diagnostic system according to claim 1, characterized in that: still carry out the diagnosis in the office to equipment, diagnostic system still includes wireless temperature sensor, wireless temperature and assembles the terminal, wireless temperature sensor sets up in the outside of equipment, and wireless temperature sensor's output and wireless temperature assemble the terminal connection, and wireless temperature assembles the output and the on-line monitoring server connection at terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220091913.9U CN216747956U (en) | 2022-01-14 | 2022-01-14 | Substation partial discharge diagnostic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220091913.9U CN216747956U (en) | 2022-01-14 | 2022-01-14 | Substation partial discharge diagnostic system |
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| CN216747956U true CN216747956U (en) | 2022-06-14 |
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| CN202220091913.9U Active CN216747956U (en) | 2022-01-14 | 2022-01-14 | Substation partial discharge diagnostic system |
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