CN-121984229-A - Quick wiring device for power supply and distribution

CN121984229ACN 121984229 ACN121984229 ACN 121984229ACN-121984229-A

Abstract

The invention belongs to the technical field of power supply and distribution, and relates to a quick wiring device for power supply and distribution, which comprises a power supply box and a plurality of independent boxes inside the power supply box, each box body is internally provided with a wiring terminal block, an environment sensing module, a current harmonic analysis module and an intelligent analysis unit. The intelligent analysis unit synchronously processes the characteristic gas concentration signal and the specific current harmonic signal, and generates an intensity index representing the time domain relevance of the characteristic gas concentration signal and the specific current harmonic signal through cross correlation calculation, so that early insulation fault early warning is realized. Meanwhile, the intelligent analysis unit can evaluate condensation risks according to the temperature and humidity data to adjust early warning grades, and can support multi-box networking to achieve fault positioning. The invention solves the problem that the existing wiring device lacks state monitoring capability, and realizes the transition from passive connection to active intelligent diagnosis.

Inventors

LIN QINGLOU
WANG QILI
LUO CHAOLONG
CHEN GUOHONG

Assignees

厦门明翰电气股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (10)

1. The utility model provides a supply quick termination for distribution, includes the power box, be equipped with a plurality of boxes (1) in the power box, be provided with binding post row (2) in box (1), its characterized in that still includes: The environment sensing module (3) is arranged in the box body (1) and is used for monitoring the concentration of at least one characteristic gas reflecting insulation degradation; the current harmonic analysis module (4) is used for collecting and analyzing the harmonic content of the line current flowing through the wiring terminal block (2) in real time; The intelligent analysis unit (5) is respectively in communication connection with the environment sensing module (3) and the current harmonic analysis module (4); The intelligent analysis unit (5) is configured to perform the steps of: s1, synchronously acquiring characteristic gas concentration time sequence data C (t) acquired by the environment sensing module (3) and specific subharmonic content time sequence data H (t) acquired by the current harmonic analysis module (4); S2, in a set sliding time window, calculating a cross-correlation function R_ch (tau) of C (t) and H (t), and finding the maximum absolute value |R_max|; S3, carrying out normalization processing on the |R_max| to obtain a correlation strength index I; s4, comparing the association strength index I with a preset threshold value, and if the association strength index I exceeds the threshold value, generating an early warning signal.
2. The quick connection device for power supply and distribution according to claim 1, characterized in that the current harmonic analysis module (4) comprises a current transformer (41) and a signal processing circuit (42) connected thereto, the signal processing circuit (42) being configured to extract and calculate the content or amplitude of a preset number of harmonics in the line current.
3. The rapid wiring device for power supply and distribution according to claim 1, characterized in that the intelligent analysis unit (5) comprises a processor (51) and a memory (52), the memory (52) having stored therein program instructions for executing the steps S1 to S4.
4. The quick connection device for power supply and distribution according to claim 1, wherein in the step S2, calculating the cross-correlation function r_ch (τ) specifically includes calculating correlation coefficients of C (t) and H (t) at different time delays τ by traversing a predetermined time delay range within the sliding time window, and taking a maximum absolute value of the obtained correlation coefficients as |r_max|.
5. The rapid wiring device for power supply and distribution according to claim 1, characterized in that the environmental sensing module (3) further comprises a temperature and humidity sensor (31), the intelligent analysis unit (5) is further configured to perform the following steps: s5, calculating condensation risk level L in the box body (1) according to the data of the temperature and humidity sensor (31); s6, determining and outputting a grading early warning signal according to the weighted combination of the association strength index I and the condensation risk grade L.
6. The rapid wiring device for power supply and distribution according to claim 5, wherein the weighted combination in step S6 follows a rule that when the condensation risk level L is high risk, the threshold value of the association intensity index I required for triggering the early warning is lowered, or when both the association intensity index I and the condensation risk level L reach high risk, the emergency early warning signal of the highest level is outputted.
7. The rapid wiring device for power supply and distribution according to any one of claims 1 to 6, characterized in that the gas sensor in the environmental sensing module (3) is a metal oxide semiconductor gas sensor or an electrochemical gas sensor (32).
8. The rapid wiring device for power supply and distribution according to any one of claims 1 to 6, further comprising a local alarm module (6) connected to the intelligent analysis unit (5) for emitting an audible and visual alarm message when the early warning signal is triggered.
9. The rapid wiring device for power supply and distribution according to any one of claims 1 to 6, characterized in that the intelligent analysis unit (5) is further integrated with a wireless communication module (7) for uploading the pre-warning signal, the correlation strength index and the raw data to a remote monitoring center.
10. The rapid wiring device for power supply and distribution according to claim 1, wherein intelligent analysis units (5) corresponding to a plurality of boxes (1) in the power supply box are connected through a communication bus, and are connected with a centralized manager through communication; The centralized manager is configured to compare and analyze the change trend of the association intensity indexes I detected by different boxes (1), determine that a local insulation fault exists in a loop corresponding to the box (1) if only the index of a single box (1) is abnormally increased, and determine that systematic common mode interference or upstream public bus abnormality exists if the indexes of a plurality of boxes (1) are synchronously increased.

Description

Quick wiring device for power supply and distribution Technical Field The invention relates to the technical field of power supply and distribution, in particular to a rapid wiring device for power supply and distribution. Background The quick wiring device for power supply and distribution is integrated and modularized electrical connection equipment, and the efficiency and reliability of installation, maintenance and emergency power supply of a power distribution system are obviously improved. In a power supply and distribution network, connection points (such as terminal strip crimping positions) inside a wiring device are weak links of electrical connection, and partial discharge is easily caused by loosening, corrosion or insulation aging in long-term operation, and the process is accompanied by characteristic gas generation and current waveform distortion. However, in the prior art, general state monitoring of large-scale equipment such as transformers, switch cabinets and the like is focused on, or only single temperature and humidity and current sensors are installed at the head and the tail of a line, and direct and early fault sensing cannot be performed on wiring points which are widely distributed and hidden in the box body. Such a blind monitoring area causes a continuous development of local hidden trouble until a serious accident is caused. In view of the above, the present invention provides a fast wiring device for power supply and distribution, which solves the above technical problems. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The utility model provides a supply quick termination for distribution, includes the power box, be equipped with a plurality of boxes in the power box, be provided with binding post row in the box, still include: the environment sensing module is arranged in the box body and is used for monitoring the concentration of at least one characteristic gas reflecting insulation degradation; the current harmonic analysis module is used for collecting and analyzing the harmonic content of the line current flowing through the wiring terminal block in real time; the intelligent analysis unit is respectively in communication connection with the environment sensing module and the current harmonic analysis module; The intelligent analysis unit is configured to perform the steps of: S1, synchronously acquiring characteristic gas concentration time sequence data C (t) acquired by the environment sensing module and specific subharmonic content time sequence data H (t) acquired by the current harmonic analysis module; S2, in a set sliding time window, calculating a cross-correlation function R_ch (tau) of C (t) and H (t), and finding the maximum absolute value |R_max|; S3, carrying out normalization processing on the |R_max| to obtain a correlation strength index I; s4, comparing the association strength index I with a preset threshold value, and if the association strength index I exceeds the threshold value, generating an early warning signal. Preferably, the current harmonic analysis module comprises a current transformer and a signal processing circuit connected with the current transformer, wherein the signal processing circuit is configured to extract and calculate the content or the amplitude of preset times of harmonic in the line current. Preferably, the intelligent analysis unit includes a processor and a memory, and the memory stores program instructions for executing the steps S1 to S4. Preferably, in the step S2, calculating the cross-correlation function r_ch (τ) specifically includes calculating correlation coefficients of C (t) and H (t) at different time delays τ by traversing a predetermined time delay range within the sliding time window, and taking a maximum absolute value of the obtained correlation coefficients as |r_max|. Preferably, the environment sensing module further comprises a temperature and humidity sensor, and the intelligent analysis unit is further configured to execute the following steps: s5, calculating a condensation risk level L in the box body according to the data of the temperature and humidity sensor; s6, determining and outputting a grading early warning signal according to the weighted combination of the association strength index I and the condensation risk grade L. Preferably, the weighted combination in the step S6 follows a rule that, when the condensation risk level L is high risk, the threshold value of the association strength index I required for triggering the early warning is reduced, or when both the association strength index I and the condensation risk level L reach high risk, the highest-level emergency