A system and method for realizing remote alarm of internal heating of substation switch cabinet

Abstract

The present invention provides a system and method for realizing remote alarm of internal heating of a substation switch cabinet, belonging to the technical field of substation equipment protection, the system includes a temperature measuring optical fiber, an optical fiber temperature measurement processing module and a remote information management module; the temperature measuring optical fiber is provided with a temperature measuring end and a transmission end; the temperature measuring end of the temperature measuring optical fiber is arranged at the device under test in the switch cabinet, and the transmission end of the temperature measuring optical fiber is connected to the optical fiber temperature measurement processing module; the optical fiber temperature measurement processing module collects the optical signal of the temperature measuring optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module; the remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and performs temperature warning according to the preset temperature threshold and warning method. The present invention monitors the temperature in the switch cabinet in real time through the temperature measuring optical fiber, has high temperature measurement accuracy, and warns of temperature faults in advance, saving the inspection workload of operation and maintenance personnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of substation equipment protection, and in particular relates to a system and method for realizing remote alarm of internal heating of a substation switch cabinet. Background Art

[0002] At present, infrared temperature measurement technology is widely used in substations for patrol temperature measurement. As a non-contact temperature measurement, the principle of infrared temperature measurement is to measure the infrared radiation on the surface of the object to be measured to infer the surface temperature. The disadvantage of this temperature measurement method is that it cannot measure the internal temperature of the equipment, resulting in blind spots in temperature detection, inaccuracy, and inability to monitor the temperature in real time. In particular, for switch cabinet equipment, the temperature inside the cabinet shell cannot be measured by infrared temperature measurement. Once the internal heat is generated, it cannot be discovered in time, which can easily cause the internal components of the switch cabinet to burn, the switch to trip, and even fire accidents. The failure of the switch cabinet will eventually cause large-scale power outages, reduce the safe operation of the power grid, and affect normal power supply. In addition, the cycle of manual patrols in substations is relatively long and inefficient.

[0003] In summary, the substation cannot obtain the accurate temperature inside the switch cabinet equipment through infrared patrol temperature measurement, there are temperature blind spots, and the real-time temperature cannot be obtained, resulting in the failure of components to detect heating failures in time, thus posing a safety hazard and affecting the safe operation of the power grid. In addition, manual patrols are inefficient.

[0004] This is a shortcoming of the prior art. Therefore, in view of the above-mentioned defects in the prior art, it is very necessary to provide a system and method for realizing remote alarm of internal heating of a substation switch cabinet. Summary of the invention

[0005] In view of the defect that the above-mentioned substation in the prior art uses infrared patrol temperature measurement, it is impossible to obtain the accurate temperature inside the switch cabinet equipment, there are temperature blind spots, and it is impossible to obtain the real-time temperature, resulting in the failure of heating caused by component failure to be discovered in time, thereby posing a safety hazard and affecting the safe operation of the power grid. In addition, the efficiency of manual patrol is low. The present invention provides a system and method for realizing remote alarm of heating inside the substation switch cabinet to solve the above technical problems.

[0006] In a first aspect, the present invention provides a system for realizing remote alarm of heating inside a substation switch cabinet, comprising a temperature measuring optical fiber, an optical fiber temperature measuring processing module, an on-site touch display screen module and a remote information management module;

[0007] The temperature measuring optical fiber is provided with a temperature measuring end and a transmission end;

[0008] The temperature measuring end of the temperature measuring optical fiber is arranged at the device under test in the switch cabinet, and the transmission end of the temperature measuring optical fiber is connected to the optical fiber temperature measuring processing module;

[0009] The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module;

[0010] The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods; the remote information management module includes:

[0011] The monitoring point positioning unit saves the substation electronic map in advance and marks the temperature of the device under test at the corresponding position on the substation electronic map to realize real-time display of the monitoring point temperature;

[0012] The equipment monitoring unit queries the online status of each optical fiber temperature measurement processing module and sends the sampling interval to the optical fiber temperature measurement processing module;

[0013] The temperature statistics unit performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve;

[0014] The temperature monitoring strategy configuration unit receives the monitoring and warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends them to the optical fiber temperature processing module;

[0015] The temperature monitoring strategy includes alarming when the set monitoring and warning temperature range is exceeded, alarming when the temperature rise rate exceeds the set rate threshold, and alarming when the real-time temperature exceeds the average temperature to reach the set temperature difference; the warning method includes sending an alarm SMS or alarm email to the operation and maintenance personnel;

[0016] The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen display module;

[0017] The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues an early warning in accordance with the set early warning method when the early warning conditions in the temperature monitoring strategy are triggered.

[0018] Further, the optical fiber temperature processing module includes a signal processing unit, a laser driving unit, a light wave multiplexing unit, a detection unit and a data transmission unit;

[0019] The signal processing unit is connected to the laser driving unit and the detection unit, and the other end of the detection unit is connected to the lightwave multiplexing unit;

[0020] The temperature measurement optical fiber transmission end is provided with a first interface and a second interface;

[0021] The other end of the optical wave multiplexing unit is connected to the first interface of the temperature measuring optical fiber transmission end, and the other end of the laser driving unit is connected to the second interface of the temperature measuring optical fiber transmission end;

[0022] The data transmission unit is connected to both the signal processing unit and the remote information management module.

[0023] Further, the laser driving unit includes a laser diode LD, a light-emitting driving subunit and a light-emitting feedback subunit;

[0024] The light-emitting driving subunit is connected to the laser diode LD and the signal processing unit;

[0025] The laser diode LD is arranged at the second interface of the temperature measuring optical fiber transmission end, and the light-emitting driving subunit receives the instruction of the signal processing unit to drive the laser diode to emit light;

[0026] The light-emitting feedback subunit collects and amplifies the light-emitting signal of the laser diode LD and then provides it to the signal processing unit.

[0027] Further, the light-emitting driving subunit includes a transistor Q1 and an inductor L1;

[0028] The base of the transistor Q1 is connected to a resistor R1, the other end of the resistor R1 is connected to a capacitor C1 and is connected to the signal processing unit, and the other end of the capacitor C1 is grounded;

[0029] The collector of transistor Q1 is connected to resistor R2, and the other end of resistor R2 is connected to power supply VCC1;

[0030] The emitter of transistor Q1 is connected to resistor R3, the other end of resistor R3 is connected to capacitor C2 and resistor R4, and is connected to inductor L1, the other end of inductor L1 is connected to the positive electrode of laser diode LD;

[0031] The other end of the capacitor C2 is connected to the other end of the resistor R4 and the cathode of the laser diode LD, and is grounded.

[0032] Further, the light emitting feedback subunit includes a photodiode D1 and an operational amplifier A1;

[0033] The same-direction input terminal of the operational amplifier A1 is connected to resistors R5 and R6, and the reverse input terminal of the operational amplifier A1 is connected to resistors R7 and R8;

[0034] The other end of the resistor R5 is connected to the power supply VCC2 and the resistor R9, the other end of the resistor R9 is connected to the other end of the resistor R7 and the positive electrode of the photodiode D1, and the negative electrode of the photodiode D1 is grounded;

[0035] The other end of the resistor R8 is grounded, and the other end of the resistor R6 is connected to the output end of the operational amplifier A1 and to the signal processing unit;

[0036] The distance between the photodiode D1 and the laser diode LD is smaller than the set distance threshold.

[0037] Further, the optical fiber temperature processing module also includes a power supply unit;

[0038] The power supply unit includes a voltage conversion subunit and a battery;

[0039] The storage battery is connected to the input end of the voltage conversion subunit, and the output end of the voltage conversion subunit is connected to the electric signal processing unit, the laser driving unit, the light wave multiplexing unit, the detection unit and the data transmission unit.

[0040] Furthermore, the laser driving unit transmits a light wave pulse signal to the temperature measuring optical fiber, and the light wave pulse signal is transmitted in the temperature measuring optical fiber and generates a scattered light signal in the back direction;

[0041] The lightwave multiplexing unit isolates the interference light signal component in the scattered light signal;

[0042] The detection unit identifies the temperature-sensitive light signal and the reference light signal from the isolated scattered light signal, and calculates the ratio of the temperature-sensitive light signal to the reference light signal, and then calculates the temperature of the device under test in the switch cabinet detected by the temperature-sensitive optical fiber according to the ratio as the collected temperature value, and provides the collected temperature value to the signal processing unit;

[0043] The signal processing unit records the time point when the laser driving unit emits the light wave pulse signal, and records the time when the detection unit receives the scattered light signal, calculates the echo time, and calculates the optical fiber position corresponding to the device under test in the switch cabinet according to the echo time;

[0044] The signal processing unit provides the collected temperature value and the optical fiber position of the device under test to the remote information management module through the data transmission unit;

[0045] The data transmission unit includes a SIM transmission subunit, which wirelessly connects to a remote information management module through SIM traffic to transmit data.

[0046] Further, the data transmission unit also includes an RS485 transmission subunit;

[0047] The signal processing unit sends the collected temperature value to the touch display screen module through the signal line of the RS485 transmission subunit;

[0048] The touch screen module displays the temperature of the device under test in the switch cabinet at the substation in real time.

[0049] In a second aspect, the present invention provides a method for realizing remote alarm of internal heating of a substation switch cabinet, comprising the following steps:

[0050] S1. A temperature measuring optical fiber is set at the device under test in each switch cabinet of the substation, a field touch screen module and an optical fiber temperature measurement processing module are set at the substation site, and a connection is established between the optical fiber temperature measurement processing module, the temperature measurement optical fiber and the field touch screen module;

[0051] S2. Set up a remote information management module in the power dispatching center and establish a connection between the remote information management module and each optical fiber test processing module;

[0052] S3. The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module;

[0053] S4. The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods.

[0054] Furthermore, the specific steps of step S4 are as follows:

[0055] S41. The remote information management module pre-saves the substation electronic map and marks the temperature of the device under test at the corresponding position on the substation electronic map to achieve real-time display of the temperature at the monitoring point;

[0056] S42. The remote information management module queries the online status of each optical fiber temperature measurement processing module and sends a sampling interval to the optical fiber temperature measurement processing module;

[0057] S43. The remote information management module performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve;

[0058] S44. The remote information management module receives the monitoring warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends it to the optical fiber temperature processing module;

[0059] The specific steps of step S3 are as follows:

[0060] S31. The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen module;

[0061] S32. The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues a warning in accordance with the set warning method when the warning conditions in the temperature monitoring strategy are triggered.

[0062] The beneficial effects of the present invention are:

[0063] The system and method for realizing remote alarm of internal heating of the substation switch cabinet provided by the present invention monitors the temperature inside the switch cabinet in real time through the temperature measuring optical fiber, has high temperature measurement accuracy, saves the workload of the operation and maintenance personnel for inspection, and reduces the electric shock accidents, traffic accidents and natural disasters caused by the operation and maintenance personnel during the inspection and temperature measurement process. The present invention also automatically compares and analyzes the temperature measurement data through the remote information management module, and timely warns of heating inside the switch cabinet, ensures the safe operation of the power equipment, and improves the reliability of the power grid operation.

[0064] In addition, the invention has a reliable design principle, a simple structure and a very broad application prospect.

[0065] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0067] Figure 1 The present invention is a schematic diagram of a system for realizing remote alarm of internal heating of a substation switch cabinet.

[0068] Figure 2 It is a schematic diagram of a system optical fiber temperature processing module and a remote information management module for realizing remote alarm of internal heating of a substation switch cabinet according to the present invention.

[0069] Figure 3 The present invention is a circuit diagram of a laser driving unit of a system for realizing remote alarm of internal heating of a substation switch cabinet.

[0070] Figure 4 The present invention is a flow chart of a method for realizing remote alarm of internal heating of a substation switch cabinet. DETAILED DESCRIPTION

[0071] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0072] Embodiment 1:

[0073] See also Figure 1 It is a system for realizing remote alarm of internal heating of substation switch cabinet in specific implementation, including temperature measuring optical fiber, optical fiber temperature measuring processing module, on-site touch display module and remote information management module;

[0074] The temperature measuring optical fiber is provided with a temperature measuring end and a transmission end;

[0075] The temperature measuring end of the temperature measuring optical fiber is arranged at the device under test in the switch cabinet, and the transmission end of the temperature measuring optical fiber is connected to the optical fiber temperature measuring processing module;

[0076] The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module;

[0077] The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods;

[0078] The remote information management module includes:

[0079] The monitoring point positioning unit saves the substation electronic map in advance and marks the temperature of the device under test at the corresponding position on the substation electronic map to realize real-time display of the monitoring point temperature;

[0080] The equipment monitoring unit queries the online status of each optical fiber temperature measurement processing module and sends the sampling interval to the optical fiber temperature measurement processing module;

[0081] The temperature statistics unit performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve;

[0082] The temperature monitoring strategy configuration unit receives the monitoring and warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends them to the optical fiber temperature processing module;

[0083] The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen display module;

[0084] The temperature monitoring strategy includes alarming when the set monitoring and warning temperature range is exceeded, alarming when the temperature rise rate exceeds the set rate threshold, and alarming when the real-time temperature exceeds the average temperature to reach the set temperature difference;

[0085] The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues an early warning in accordance with the set early warning method when the early warning conditions in the temperature monitoring strategy are triggered.

[0086] Embodiment 2:

[0087] like Figure 1 and Figure 2 As shown, the present invention provides a system for realizing remote alarm of heating inside a substation switch cabinet, including a temperature measuring optical fiber, an optical fiber temperature measuring processing module, a remote information management module and an on-site touch display screen module;

[0088] The temperature measuring optical fiber is provided with a temperature measuring end and a transmission end;

[0089] The temperature measuring end of the temperature measuring optical fiber is set at the device under test in the switch cabinet, and the transmission end of the temperature measuring optical fiber is connected to the optical fiber temperature measurement processing module; for example, the device under test can be the switch cabinet contact, busbar, cable; excessive operating load, untimely internal cleaning, insufficient spring elasticity, and improper trolley position can all cause overheating inside the switch cabinet, so temperature monitoring is very important;

[0090] The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module;

[0091] The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods;

[0092] The optical fiber temperature processing module includes a signal processing unit, a laser driving unit, a light wave multiplexing unit, a detection unit and a data transmission unit;

[0093] The signal processing unit is connected to the laser driving unit and the detection unit, and the other end of the detection unit is connected to the lightwave multiplexing unit;

[0094] The temperature measurement optical fiber transmission end is provided with a first interface and a second interface;

[0095] The other end of the optical wave multiplexing unit is connected to the first interface of the temperature measuring optical fiber transmission end, and the other end of the laser driving unit is connected to the second interface of the temperature measuring optical fiber transmission end;

[0096] The data transmission unit is connected to both the signal processing unit and the remote information management module;

[0097] The laser driving unit includes a laser diode LD, a light-emitting driving subunit and a light-emitting feedback subunit;

[0098] The light-emitting driving subunit is connected to the laser diode LD and the signal processing unit;

[0099] The laser diode LD is arranged at the second interface of the temperature measuring optical fiber transmission end, and the light-emitting driving subunit receives the instruction of the signal processing unit to drive the laser diode to emit light;

[0100] The light-emitting feedback subunit collects and amplifies the light-emitting signal of the laser diode LD and then provides it to the signal processing unit;

[0101] The light-emitting driving subunit includes a transistor Q1 and an inductor L1;

[0102] The base of the transistor Q1 is connected to a resistor R1, the other end of the resistor R1 is connected to a capacitor C1 and is connected to the signal processing unit, and the other end of the capacitor C1 is grounded;

[0103] The collector of transistor Q1 is connected to resistor R2, and the other end of resistor R2 is connected to power supply VCC1;

[0104] The emitter of transistor Q1 is connected to resistor R3, the other end of resistor R3 is connected to capacitor C2 and resistor R4, and is connected to inductor L1, the other end of inductor L1 is connected to the positive electrode of laser diode LD;

[0105] The other end of the capacitor C2 is connected to the other end of the resistor R4 and the cathode of the laser diode LD, and is grounded;

[0106] The light emitting feedback subunit includes a photodiode D1 and an operational amplifier A1;

[0107] The same-direction input terminal of the operational amplifier A1 is connected to resistors R5 and R6, and the reverse input terminal of the operational amplifier A1 is connected to resistors R7 and R8;

[0108] The other end of the resistor R5 is connected to the power supply VCC2 and the resistor R9, the other end of the resistor R9 is connected to the other end of the resistor R7 and the positive electrode of the photodiode D1, and the negative electrode of the photodiode D1 is grounded;

[0109] The other end of the resistor R8 is grounded, and the other end of the resistor R6 is connected to the output end of the operational amplifier A1 and to the signal processing unit;

[0110] The distance between the photodiode D1 and the laser diode LD is less than the set distance threshold;

[0111] The optical fiber temperature processing module also includes a power supply unit;

[0112] The power supply unit includes a voltage conversion subunit and a battery;

[0113] The storage battery is connected to the input end of the voltage conversion subunit, and the output end of the voltage conversion subunit is connected to the electrical signal processing unit, the laser driving unit, the light wave multiplexing unit, the detection unit and the data transmission unit;

[0114] The laser driving unit transmits a light wave pulse signal to the temperature measuring optical fiber, and the light wave pulse signal is transmitted in the temperature measuring optical fiber and generates a scattered light signal in the back direction;

[0115] The lightwave multiplexing unit isolates the interference light signal component in the scattered light signal;

[0116] The detection unit identifies the temperature-sensitive light signal and the reference light signal from the isolated scattered light signal, and calculates the ratio of the temperature-sensitive light signal to the reference light signal, and then calculates the temperature of the device under test in the switch cabinet detected by the temperature-sensitive optical fiber according to the ratio as the collected temperature value, and provides the collected temperature value to the signal processing unit;

[0117] The signal processing unit records the time point when the laser driving unit emits the light wave pulse signal, and records the time when the detection unit receives the scattered light signal, calculates the echo time, and calculates the optical fiber position corresponding to the device under test in the switch cabinet according to the echo time;

[0118] The signal processing unit provides the collected temperature value and the optical fiber position of the device under test to the remote information management module through the data transmission unit;

[0119] The data transmission unit includes a SIM transmission subunit, which wirelessly connects to the remote information management module through the SIM traffic to transmit data;

[0120] The data transmission unit also includes an RS485 transmission subunit;

[0121] The signal processing unit sends the collected temperature value to the touch display screen module through the signal line of the RS485 transmission subunit;

[0122] The touch screen module displays the temperature of the device under test in the switch cabinet at the substation in real time;

[0123] The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen display module;

[0124] The temperature monitoring strategy includes alarming when the set monitoring and warning temperature range is exceeded, alarming when the temperature rise rate exceeds the set rate threshold, and alarming when the real-time temperature exceeds the average temperature to reach the set temperature difference; the warning method includes sending an alarm SMS or alarm email to the operation and maintenance personnel;

[0125] The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues an early warning according to the set early warning method when the early warning conditions in the temperature monitoring strategy are triggered;

[0126] The remote information management module includes:

[0127] The monitoring point positioning unit is used to save the substation electronic map in advance and mark the temperature of the device under test at the corresponding position on the substation electronic map to realize the real-time display of the monitoring point temperature;

[0128] The equipment monitoring unit is used to query the online status of each optical fiber temperature measurement processing module and send the sampling interval to the optical fiber temperature measurement processing module;

[0129] The temperature statistics unit is used to perform statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generate a temperature curve;

[0130] The temperature monitoring strategy configuration unit is used to receive the monitoring and warning temperature range, temperature monitoring strategy and warning method configured by the user, and send them to the optical fiber temperature processing module.

[0131] The following is an embodiment of a method for realizing remote alarm of internal heating of a substation switch cabinet provided by an embodiment of the present disclosure. The method and the system for realizing remote alarm of internal heating of a substation switch cabinet in the above embodiments belong to the same inventive concept. For details not fully described in the embodiment of the method for realizing remote alarm of internal heating of a substation switch cabinet, reference can be made to the above. Embodiment of a system for realizing remote alarm of internal heating of a substation switch cabinet.

[0132] Embodiment 3:

[0133] like Figure 4 As shown, the method comprises the following steps:

[0134] S1. A temperature measuring optical fiber is set at the device under test in each switch cabinet of the substation, a field touch screen module and an optical fiber temperature measurement processing module are set at the substation site, and a connection is established between the optical fiber temperature measurement processing module, the temperature measurement optical fiber and the field touch screen module;

[0135] S2. Set up a remote information management module in the power dispatching center and establish a connection between the remote information management module and each optical fiber test processing module;

[0136] S3. The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module;

[0137] S4. The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods.

[0138] In this embodiment, the specific steps of step S4 are as follows:

[0139] S41. The remote information management module pre-saves the substation electronic map and marks the temperature of the device under test at the corresponding position on the substation electronic map to achieve real-time display of the temperature at the monitoring point;

[0140] S42. The remote information management module queries the online status of each optical fiber temperature measurement processing module and sends a sampling interval to the optical fiber temperature measurement processing module;

[0141] S43. The remote information management module performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve;

[0142] S44. The remote information management module receives the monitoring warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends it to the optical fiber temperature processing module;

[0143] The specific steps of step S3 are as follows:

[0144] S31. The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen module;

[0145] S32. The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues a warning in accordance with the set warning method when the warning conditions in the temperature monitoring strategy are triggered.

[0146] It should be understood that the size of the sequence number of each step in the above embodiment does not mean that the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention. Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited to this. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should be within the scope of the present invention / any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the scope of protection of the present invention.

Claims

1. A system for realizing remote alarm of internal heating of substation switch cabinet, characterized in that: It includes temperature measurement optical fiber, optical fiber temperature measurement processing module, on-site touch display module and remote information management module; The temperature measuring optical fiber is provided with a temperature measuring end and a transmission end; The temperature measuring end of the temperature measuring optical fiber is arranged at the device under test in the switch cabinet, and the transmission end of the temperature measuring optical fiber is connected to the optical fiber temperature measuring processing module; The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module; The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods; The remote information management module includes: The monitoring point positioning unit saves the substation electronic map in advance and marks the temperature of the device under test at the corresponding position on the substation electronic map to realize the real-time display of the monitoring point temperature; The equipment monitoring unit queries the online status of each optical fiber temperature measurement processing module and sends the sampling interval to the optical fiber temperature measurement processing module; The temperature statistics unit performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve; The temperature monitoring strategy configuration unit receives the monitoring and warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends them to the optical fiber temperature processing module; The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen display module; The temperature monitoring strategy includes alarming when the set monitoring and warning temperature range is exceeded, alarming when the temperature rise rate exceeds the set rate threshold, and alarming when the real-time temperature exceeds the average temperature to reach the set temperature difference; The warning method includes sending an alarm text message or an alarm email to the operation and maintenance personnel; The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues an early warning according to the set early warning method when the early warning conditions in the temperature monitoring strategy are triggered; The optical fiber temperature processing module includes a signal processing unit, a laser driving unit, a light wave multiplexing unit, a detection unit and a data transmission unit; The signal processing unit is connected to the laser driving unit and the detection unit, and the other end of the detection unit is connected to the lightwave multiplexing unit; The temperature measurement optical fiber transmission end is provided with a first interface and a second interface; The other end of the optical wave multiplexing unit is connected to the first interface of the temperature measuring optical fiber transmission end, and the other end of the laser driving unit is connected to the second interface of the temperature measuring optical fiber transmission end; The data transmission unit is connected to both the signal processing unit and the remote information management module; The laser driving unit includes a laser diode LD, a light-emitting driving subunit and a light-emitting feedback subunit; The light-emitting driving subunit is connected to the laser diode LD and the signal processing unit; The laser diode LD is arranged at the second interface of the temperature measuring optical fiber transmission end, and the light-emitting driving subunit receives the instruction of the signal processing unit to drive the laser diode to emit light; The light-emitting feedback subunit collects and amplifies the light-emitting signal of the laser diode LD and then provides it to the signal processing unit; The light-emitting driving subunit includes a transistor Q1 and an inductor L1; The base of the transistor Q1 is connected to a resistor R1, the other end of the resistor R1 is connected to a capacitor C1 and is connected to the signal processing unit, and the other end of the capacitor C1 is grounded; The collector of transistor Q1 is connected to resistor R2, and the other end of resistor R2 is connected to power supply VCC1; The emitter of transistor Q1 is connected to resistor R3, the other end of resistor R3 is connected to capacitor C2 and resistor R4, and is connected to inductor L1, the other end of inductor L1 is connected to the positive electrode of laser diode LD; The other end of the capacitor C2 is connected to the other end of the resistor R4 and the cathode of the laser diode LD, and is grounded.

2. The system for realizing remote alarm of heating inside the substation switch cabinet according to claim 1, characterized in that: The light emitting feedback subunit includes a photodiode D1 and an operational amplifier A1; The same-direction input terminal of the operational amplifier A1 is connected to resistors R5 and R6, and the reverse input terminal of the operational amplifier A1 is connected to resistors R7 and R8; The other end of the resistor R5 is connected to the power supply VCC2 and the resistor R9, the other end of the resistor R9 is connected to the other end of the resistor R7 and the positive electrode of the photodiode D1, and the negative electrode of the photodiode D1 is grounded; The other end of the resistor R8 is grounded, and the other end of the resistor R6 is connected to the output end of the operational amplifier A1 and to the signal processing unit; The distance between the photodiode D1 and the laser diode LD is smaller than the set distance threshold.

3. The system for realizing remote alarm of internal heating of substation switch cabinet according to claim 1, characterized in that: The optical fiber temperature processing module also includes a power supply unit; The power supply unit includes a voltage conversion subunit and a battery; The storage battery is connected to the input end of the voltage conversion subunit, and the output end of the voltage conversion subunit is connected to the electric signal processing unit, the laser driving unit, the light wave multiplexing unit, the detection unit and the data transmission unit.

4. The system for realizing remote alarm of internal heating of substation switch cabinet according to claim 1, characterized in that: The laser driving unit transmits a light wave pulse signal to the temperature measuring optical fiber, and the light wave pulse signal is transmitted in the temperature measuring optical fiber and generates a scattered light signal in the back direction; The lightwave multiplexing unit isolates the interference light signal component in the scattered light signal; The detection unit identifies the temperature-sensitive light signal and the reference light signal from the isolated scattered light signal, and calculates the ratio of the temperature-sensitive light signal to the reference light signal, and then calculates the temperature of the device under test in the switch cabinet detected by the temperature-sensitive optical fiber according to the ratio as the collected temperature value, and provides the collected temperature value to the signal processing unit; The signal processing unit records the time point when the laser driving unit emits the light wave pulse signal, and records the time when the detection unit receives the scattered light signal, calculates the echo time, and calculates the optical fiber position corresponding to the device under test in the switch cabinet according to the echo time; The signal processing unit provides the collected temperature value and the optical fiber position of the device under test to the remote information management module through the data transmission unit; The data transmission unit includes a SIM transmission subunit, which wirelessly connects to a remote information management module through SIM traffic to transmit data.

5. The system for realizing remote alarm of internal heating of substation switch cabinet according to claim 4, characterized in that: The data transmission unit also includes an RS485 transmission subunit; The signal processing unit sends the collected temperature value to the touch display screen module through the signal line of the RS485 transmission subunit; The touch screen module displays the temperature of the device under test in the switch cabinet at the substation in real time.

6. A method for realizing a remote alarm system for internal heating of a substation switch cabinet using any one of claims 1 to 5, characterized in that: The steps include: S1. A temperature measuring optical fiber is set at the device under test in each switch cabinet of the substation, a field touch screen module and an optical fiber temperature measurement processing module are set at the substation site, and a connection is established between the optical fiber temperature measurement processing module, the temperature measurement optical fiber and the field touch screen module; S2. Set up a remote information management module in the power dispatching center and establish a connection between the remote information management module and each optical fiber test processing module; S3. The optical fiber temperature measurement processing module collects the optical signal of the temperature measurement optical fiber, analyzes the optical signal to identify the temperature information and the position of the device under test, and reports it to the remote information management module; S4. The remote information management module analyzes the temperature information of the device under test, graphically displays the temperature information of the substation switch cabinet, and issues temperature warnings based on preset temperature thresholds and warning methods.

7. The method according to claim 6, characterized in that The specific steps of step S4 are as follows: S41. The remote information management module pre-saves the substation electronic map and marks the temperature of the device under test at the corresponding position on the substation electronic map to achieve real-time display of the temperature at the monitoring point; S42. The remote information management module queries the online status of each optical fiber temperature measurement processing module and sends a sampling interval to the optical fiber temperature measurement processing module; S43. The remote information management module performs statistical analysis on the temperature data reported by each optical fiber temperature measurement processing module and generates a temperature curve; S44. The remote information management module receives the monitoring warning temperature range, temperature monitoring strategy and warning method configured by the user, and sends it to the optical fiber temperature processing module; The specific steps of step S3 are as follows: S31. The optical fiber temperature measurement processing module receives the monitoring and warning temperature range, temperature monitoring strategy and warning method issued by the remote information management module or the on-site touch screen module; S32. The optical fiber temperature processing module performs real-time temperature monitoring of the devices under test inside the switch cabinet according to the monitoring and warning temperature range and temperature monitoring strategy issued, and issues a warning in accordance with the set warning method when the warning conditions in the temperature monitoring strategy are triggered.

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