Remote monitoring system for electrical equipment

Abstract

The invention relates to the technical field of electrical equipment monitoring, and discloses an electrical equipment remote monitoring system. The system obtains key electrical parameters such as current, voltage, power and temperature in real time through an electrical parameter acquisition unit, the key electrical parameters are sent to a data calculation and analysis unit through wireless transmission, real-time current, real-time voltage, real-time power and a standard temperature value are obtained through calculation, an abnormal monitoring unit carries out threshold value analysis on real-time data through a preset monitoring analyzer, and an abnormal monitoring result is obtained. According to the system, potential abnormal conditions can be recognized in time, when it is detected that any parameter exceeds a set safety upper limit, the system immediately sends out a corresponding early warning signal, the remote early warning unit forwards the early warning signal to communication equipment of maintenance personnel, and the maintenance personnel can quickly position the fault position of the ship electrical equipment for repairing. Large-range inspection is not needed, the maintenance efficiency of the electrical equipment is improved, and the risk of ship navigation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment monitoring, and in particular to a remote monitoring system for electrical equipment. Background Art

[0002] With the development of modern science and technology, electrical equipment is being used more and more widely in various industrial and commercial fields. Electrical equipment on ships plays a vital role in ensuring safety, improving efficiency and functionality. They are responsible for providing power control, lighting, communication, navigation and the operation of various facilities on ships to ensure safe and comfortable navigation. For example, the power system ensures the reliable operation of all key equipment, including the main engine, auxiliary engines and other mechanical equipment, to ensure the stable operation of the ship under various sea conditions. Therefore, the construction and maintenance of electrical equipment is particularly important in ship operations and is a key factor in ensuring the safety and efficiency of maritime transportation.

[0003] Traditional electrical equipment monitoring usually relies on manual inspections and local monitoring, requiring workers to conduct inspections in every area on the ship where electrical equipment is present. When the ship is large and the electrical equipment is distributed over a wide area, it is impossible to obtain the operating status of the equipment in a timely and effective manner. This situation leads to hidden dangers of equipment failure, reduces the maintenance efficiency of electrical equipment, and increases the risk of ship navigation. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a remote monitoring system for electrical equipment, which is capable of acquiring key electrical parameters such as current, voltage, power and temperature in real time through an electrical parameter acquisition unit. After wireless transmission, these data are sent to a data calculation and analysis unit, and various data are analyzed through scientific algorithms to quickly calculate real-time current, real-time voltage, real-time power and standard temperature values. This process not only improves the efficiency of data processing, but also enhances the scientificity and accuracy of monitoring. The monitoring abnormality unit performs threshold analysis on real-time data through a preset monitoring analyzer, and can timely identify potential abnormal situations. When any parameter is detected to exceed the set safety upper limit, the system will immediately issue a corresponding early warning signal. This timely feedback mechanism greatly enhances the safety assurance capability of the ship, allowing operators to take quick action at the early stage of the problem to avoid greater losses and risks. The remote early warning unit forwards the early warning signal to the communication equipment of the maintenance personnel, and the maintenance personnel can quickly locate the fault location of the ship's electrical equipment for repair without the need for large-scale inspections, thereby improving the maintenance efficiency of electrical equipment and reducing the risk of ship navigation, etc., and solving the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions: a remote monitoring system for electrical equipment, comprising an electrical parameter acquisition unit, a data calculation and analysis unit, an abnormal monitoring unit and a remote early warning unit;

[0008] The electrical data collection unit is used to collect current data, voltage data, power data and temperature data of ship electrical equipment. The above collected data are correspondingly compiled into current data set, voltage data set, power data set and temperature data set, and sent to the data calculation and analysis unit through wireless transmission;

[0009] The data calculation and analysis unit performs analysis and calculation based on the current data set, voltage data set, power data set and temperature data set transmitted by the electrical parameter acquisition unit, obtains the standard current value of the ship electrical equipment, the standard voltage value of the ship electrical equipment, the standard power value of the ship equipment and the standard temperature value of the ship equipment, and then sends them to the monitoring abnormality unit for monitoring and analysis;

[0010] A monitoring analyzer is preset inside the monitoring abnormality unit to perform threshold analysis on the standard current value, standard voltage value, standard power value and standard temperature value of ship electrical equipment. When the monitoring analyzer detects that the transmitted value exceeds the current, voltage, power and temperature range values ​​of the ship electrical equipment preset by the monitoring analyzer, a corresponding warning signal is issued, wherein the warning corresponding signals of the standard current value, standard voltage value, standard power value and standard temperature value of the ship electrical equipment are Ka, Kb, Kc and Kd respectively, and the generated warning signals Ka, Kb, Kc and Kd are sent to the remote warning unit;

[0011] After receiving the warning signal, the remote warning unit will remotely send the monitored abnormalities of the ship's electrical equipment to the maintenance personnel's communication equipment.

[0012] Preferably, the electrical parameter acquisition unit collects five sets of current data of the ship electrical equipment every second to form a current data set set, and the current data set set is {Dplz n ,Dplz n+1 ,Dplz n+3 , ..., Dplz n+4}, five sets of voltage data of ship electrical equipment are collected every second to form a voltage data set set, and the voltage data set set is {Dxkz n ,Dxkz n+1 ,Dxkz n+2 , ..., Dxkz n+4}, five sets of power data of ship electrical equipment are collected every second to form a power data set set, and the power data set set is {Gxkp n ,Gxkpn+1 ,Gxkp n+2 , ..., Gxkp n+4}, collect five sets of temperature data of ship electrical equipment every second to form a temperature data set set, the temperature data set set is {Cwkd n ,Cwkd n+1 ,Cwkd n+2 , ..., Cwkd n+4}.

[0013] Preferably, the calculation formula for the standard current value of ship electrical equipment is as follows:

[0014]

[0015] In the formula, Ixtp real Indicates the standard current value of ship electrical equipment, obtained through current data collection, Represents average power, V sanx Indicates the three-phase voltage, Indicates the phase difference between voltage and current, obtained through the rated parameters of ship equipment. Indicates the conversion relationship between the three phases, is the power factor.

[0016] Preferably, the average power calculation formula is as follows:

[0017]

[0018] In the formula, represents the average power, N represents the total number of samples in the power data set, Gxkp i represents the power value at the i-th time point, extracted from the power dataset, means adding all the power data points, Represents the arithmetic mean, which is the sum divided by the number of data points to get the average power value.

[0019] Preferably, the power factor calculation formula is as follows:

[0020]

[0021] In the formula, It represents power factor, Yggl represents active power, which is collected through the remote monitoring system of electrical equipment, and Szgl represents apparent power, which is obtained through the nameplate parameters of electrical equipment.

[0022] Preferably, the calculation formula for the standard power value of ship electrical equipment is as follows:

[0023]

[0024] In the formula, Pxqd real Indicates the standard power value of ship electrical equipment, Ixtp real Indicates the standard current value of ship electrical equipment, Vspt real Indicates the effective value of voltage, obtained through the voltage data set, is the power factor, which indicates the phase difference between voltage and current.

[0025] Preferably, the voltage effective value calculation formula is as follows:

[0026]

[0027] In the formula, Vspt real Represents the effective value of voltage, T is the signal period, which represents the duration of a complete cycle of the voltage waveform, [V(t)] 2 represents the square of the instantaneous voltage, It means that the average value of the square of the voltage in one cycle is calculated by integration, and dt represents the integral sign.

[0028] Preferably, the calculation formula for the standard voltage value of ship electrical equipment is as follows:

[0029]

[0030] In the formula, Vcxk real Indicates the standard voltage value of ship electrical equipment, Pxqd real Indicates the standard power value of ship electrical equipment, R indicates load resistance, X indicates load reactance, It represents the modulus of the complex impedance, that is, the comprehensive impedance of the load.

[0031] Preferably, the calculation formula for the standard temperature value of ship equipment is as follows:

[0032]

[0033] In the formula, Tmpt real Indicates the standard temperature value of ship equipment, T ambient Indicates the ambient temperature around the device measured by the temperature sensor, Pxqd real Indicates the standard power value of ship electrical equipment, R thermal It represents the thermal resistance of ship equipment, and A represents the heat dissipation area of ​​the equipment.

[0034] Preferably, the conditions for the abnormal monitoring unit to issue an early warning signal are as follows:

[0035] When the standard current value of ship electrical equipment, xtp realWhen the current is greater than the current range of the ship electrical equipment preset by the monitoring analyzer, the abnormal monitoring unit will send out a warning signal Ka;

[0036] When the standard power value of ship electrical equipment is Pxqd real When it is greater than the power range value of the ship electrical equipment preset by the monitoring analyzer, the monitoring abnormality unit sends out a warning signal Kb;

[0037] When the standard voltage value of ship electrical equipment is Vcxk real When it is greater than the voltage range of the ship electrical equipment preset by the monitoring analyzer, the monitoring abnormality unit sends out an early warning signal Kc;

[0038] When the standard temperature value of ship equipment Tmpt real When the temperature is greater than the preset temperature range of the ship electrical equipment by the monitoring analyzer, the abnormal monitoring unit will send out an early warning signal Kd.

[0039] Compared with the prior art, the present invention provides a remote monitoring system for electrical equipment, which has the following beneficial effects:

[0040] The present invention acquires key electrical parameters such as current, voltage, power and temperature in real time through an electrical parameter acquisition unit. After wireless transmission, these data are sent to a data calculation and analysis unit, and various data are analyzed through scientific algorithms to quickly calculate real-time current, real-time voltage, real-time power and standard temperature values. This process not only improves the efficiency of data processing, but also enhances the scientificity and accuracy of monitoring. The monitoring abnormality unit performs threshold analysis on real-time data through a preset monitoring analyzer, and can timely identify potential abnormal situations. When any parameter is detected to exceed the set safety upper limit, the system will immediately issue a corresponding early warning signal. This timely feedback mechanism greatly enhances the safety assurance capability of the ship, allowing operators to take prompt action at the early stage of a problem to avoid greater losses and risks. The remote early warning unit forwards the early warning signal to the communication equipment of the maintenance personnel, and the maintenance personnel can quickly locate the fault location of the ship's electrical equipment for repair without large-scale inspections, thereby improving the maintenance efficiency of electrical equipment and reducing the risk of ship navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0043] Traditional electrical equipment monitoring usually relies on manual inspection and local monitoring, which requires workers to conduct inspections in each area where electrical equipment is located on the ship. When the ship is large and the electrical equipment is distributed over a wide area, it is impossible to obtain the operating status of the equipment in a timely and effective manner. This situation leads to the hidden danger of equipment failure, reduces the maintenance efficiency of electrical equipment, and increases the risk of ship navigation. Therefore, a remote monitoring system for electrical equipment is proposed. Please refer to Figure 1 ,The system includes an electrical parameter acquisition unit, a data calculation and analysis unit, an abnormality monitoring unit, and a remote early warning unit;

[0044] The electrical acquisition unit uses high-precision sensors and advanced data acquisition technology to monitor the key parameters of the ship's electrical equipment in real time, including current, voltage, power and temperature. The current data is accurately measured by the Hall effect sensor to ensure signal stability and reliability under different load conditions. The voltage data is collected through the voltage converter to ensure that it can accurately reflect the voltage fluctuations in the system. The power data is collected by combining the phase factors of current and voltage, and the power calculation algorithm is used to calculate the power output of the equipment in real time. The temperature data is captured by temperature sensors such as thermocouples to monitor the possible overheating of the equipment during operation.

[0045] All collected data will be classified and compiled into current data sets, voltage data sets, power data sets and temperature data sets to form an orderly data structure. The wireless transmission of data adopts the efficient wireless communication protocol ZigbeeZ. These technologies ensure the stability and real-time performance of data during transmission. Through these technical means, the electrical acquisition unit not only realizes the comprehensive monitoring of ship electrical equipment, but also lays the foundation for subsequent data calculation and analysis;

[0046] The data calculation and analysis unit performs analysis and calculation based on the current data set, voltage data set, power data set and temperature data set transmitted by the electrical parameter acquisition unit to obtain the standard current value of the ship electrical equipment, the standard voltage value of the ship electrical equipment, the standard power value of the ship equipment and the standard temperature value of the ship equipment, wherein:

[0047] The calculation formula for the standard current value of ship electrical equipment is as follows:

[0048]

[0049] The standard current value can help to identify equipment failures in a timely manner, such as overload, short circuit, etc., so as to formulate corresponding safety measures to prevent equipment damage and safety accidents. In the formula, Ixt preal Indicates the standard current value of ship electrical equipment, obtained through current data collection, represents the average power, calculated from the power data set, V sanx Indicates the three-phase voltage, Indicates the phase difference between voltage and current, obtained through the rated parameters of ship equipment. Indicates the conversion relationship between the three phases, The power factor indicates the phase difference between voltage and current. By monitoring the changing trend of current, the energy efficiency of the equipment can be analyzed, potential energy consumption problems can be discovered, energy conservation and emission reduction can be promoted, and operating costs can be reduced.

[0050] The calculation formula for the standard power value of ship electrical equipment is as follows:

[0051]

[0052] Real-time power monitoring can ensure that electrical equipment operates within the rated power range, avoid equipment damage caused by overload, and improve overall reliability. In the formula, Pxqd real Indicates the standard power value of ship electrical equipment, Ixtp real Indicates the standard current value of ship electrical equipment, Vspt real Indicates the effective value of voltage, obtained through the voltage data set, The power factor indicates the phase difference between voltage and current. Power data can help identify whether the equipment is operating within the normal range. By detecting power anomalies, we can promptly discover signs of equipment failure and reduce the risk of failure.

[0053] The calculation formula for the standard voltage value of ship electrical equipment is as follows:

[0054]

[0055] Monitoring the standard voltage value can help determine the power quality and load balance, ensure the stability of the power supply system, and prevent equipment damage caused by voltage fluctuations. In the formula, Vcxk real Indicates the standard voltage value of ship electrical equipment, Pxqd real Indicates the standard power value of ship electrical equipment, R indicates load resistance, X indicates load reactance, The modulus length of the complex impedance, i.e. the comprehensive impedance of the load, monitors voltage fluctuations and analyzes the relationship between voltage and power, thereby optimizing the working efficiency of the equipment and improving the overall operating performance. At the same time, by setting thresholds and monitoring voltage over-limit conditions in real time, the system can automatically cut off the high-voltage power supply or alarm to protect the equipment.

[0056] The calculation formula for the standard temperature value of ship equipment is as follows:

[0057]

[0058] The standard temperature value can timely reflect the working status of the equipment. Especially in high-power equipment, excessively high temperature may be a precursor to equipment failure, so maintenance and repair can be carried out early. In the formula, Tmpt real Indicates the standard temperature value of ship equipment, T ambient Indicates the ambient temperature around the device measured by the temperature sensor, Pxqd real Indicates the standard power value of ship electrical equipment, R thermal It represents the thermal resistance of ship equipment, and A represents the heat dissipation area of ​​the equipment. By accumulating temperature data, analyzing the thermal characteristics and operating efficiency of the equipment, data support can be provided for formulating regular maintenance and servicing, thus extending the service life of the equipment.

[0059] The conditions for the abnormal monitoring unit to issue an early warning signal are as follows:

[0060] When the standard current value of ship electrical equipment is Ixtp real When the current is greater than the preset current range of the ship electrical equipment of the monitoring analyzer, the abnormal monitoring unit will send out an early warning signal Ka, with a range of 0.8A-3.6A;

[0061] When the standard power value of ship electrical equipment is Pxqd real When it is greater than the power range of the ship electrical equipment preset by the monitoring analyzer, the monitoring abnormality unit sends out a warning signal Kb, with a range of 900W-1500W;

[0062] When the standard voltage value of ship electrical equipment is Vcxk real When the voltage is greater than the preset voltage range of the ship electrical equipment of the monitoring analyzer, the abnormal monitoring unit will send out a warning signal Kc, with a range of 380V-450V;

[0063] When the standard temperature value of ship equipment Tmpt real When the temperature is greater than the preset temperature range of the ship electrical equipment of the monitoring analyzer, the monitoring abnormality unit will send out an early warning signal Kd, ranging from 20℃ to 80℃;

[0064] When the remote warning unit receives the warning signal, the system automatically analyzes the detected abnormal situation and sends detailed fault information, data logs and abnormal parameters to the maintenance personnel's communication equipment remotely through the efficient satellite communication protocol. This information includes the type of electrical equipment affected, the data set of the abnormal state, and the recommended inspection and repair measures, so that the maintenance personnel can quickly understand the nature and severity of the problem;

[0065] After receiving the warning information, maintenance personnel can interact in real time through a dedicated mobile application. On this platform, they can view real-time data, historical trends and system recommendations to ensure a comprehensive understanding of the on-site conditions. In order to quickly respond to equipment failures, maintenance personnel can remotely send electrical equipment restart instructions, and the instruction content is transmitted to the electrical equipment remote monitoring system through a secure encryption mechanism;

[0066] The encryption mechanism adopts AES symmetric encryption. The original key generates a series of round keys through the key expansion algorithm. The input plaintext is XORed with the first round key bit by bit, and then iterates. After replacing the bytes with S-box, the bytes in each row are cyclically shifted to the left, and each column is linearly transformed and XORed with the current round key. The iterative operation is repeated, and then the XOR operation is performed with the last round key. The relevant formula is as follows:

[0067] Wheel key plus:

[0068]

[0069] Among them, C i Indicates the i-th byte of the repair instruction ciphertext, P i Indicates the i-th byte of the repair instruction plaintext, K i represents the round key of round i, Represents the exclusive OR operation;

[0070] Subbyte replacement formula:

[0071] S[i]=S box (P[i])

[0072] S[i] represents the replaced byte, S box A lookup table representing byte substitutions;

[0073] Row shift:

[0074] R[j]=P[j]

[0075] Column confusion:

[0076] C[j]=M*P[j]

[0077] Among them, C[j] represents the transformed column, and M represents the fixed polynomial matrix;

[0078] AES supports the security of 128-bit, 192-bit, and 256-bit keys. The larger the length, the more difficult it is to crack. It can resist a variety of attacks including brute force cracking and differential attacks.

[0079] After receiving these encrypted repair instructions, the electrical equipment remote monitoring system will execute fault anomaly repairs, including adjusting equipment operating parameters, resetting the system, or performing necessary operations to restore the normal function of the equipment as soon as possible. In addition, the system will record each operation and its results, and update the status report in real time to ensure that maintenance personnel can continue to track the progress of the repair.

[0080] Embodiment 1:

[0081] In this experiment, in order to verify the normal working status of electrical equipment, the following five sets of ship electrical equipment current data were collected through the electrical equipment remote monitoring system sensors and computing equipment:

[0082] Group 1: V sanx =400,

[0083] Group 2: V sanx =400,

[0084] Group 3: V sanx =400,

[0085] Group 4: V sanx =400,

[0086] Group 5: Vs sanx =400,

[0087] Substitute the values ​​collected and calculated above into the formula Calculate and get:

[0088] Group 1:

[0089] Group 2:

[0090] Group 3:

[0091] Group 4:

[0092] Group 5:

[0093] The following five groups of power data of ship electrical equipment were collected:

[0094] Group 1: Vspt real =400, Ixtp real =2.5,

[0095] Group 2: Vspt real =400,IxtPreal =3.0,

[0096] Group 3: Vspt real =400, Ixtp real =2.8,

[0097] Group 4: Vspt real =400, Ixtp real =3.1,

[0098] Group 5: Vspt real =400, Ixtp real =2.7,

[0099] Substitute the values ​​collected and calculated above into the formula Calculate and get:

[0100] Group 1:

[0101] Group 2:

[0102] Group 3:

[0103] Group 4:

[0104] Group 5:

[0105] Since the preset current value range is between 0.8A and 3.6A, the above current calculation values ​​are within the range, that is, the real-time current of the ship's electrical equipment is in normal working condition;

[0106] Since the preset power value range is between 900W and 1500W, the above power calculation values ​​are within the range, that is, the real-time power of the ship's electrical equipment is in normal working condition;

[0107] Embodiment 2:

[0108] In this experiment, in order to verify the normal working status of electrical equipment, the following five sets of ship electrical equipment current data were collected through the electrical equipment remote monitoring system sensors and computing equipment:

[0109] Group 1: V sanx =400,

[0110] Group 2: V sanx =400,

[0111] Group 3: Vsanx =400,

[0112] Group 4: V sanx =400,

[0113] Group 5: V sanx =400,

[0114] Substitute the values ​​collected and calculated above into the formula Calculate and get:

[0115] Group 1:

[0116] Group 2:

[0117] Group 3:

[0118] Group 4:

[0119] Group 5:

[0120] The following five groups of power data of ship electrical equipment were collected:

[0121] Group 1: Vzpt real =400, Ixtp real =1.2,

[0122] Group 2: Vspt real =400, Ixtp real =1.5,

[0123] Group 3: Vspt real =400, Ixtp real =1.0,

[0124] Group 4: Vspt real =400,IxtP real =0.5,

[0125] Group 5: Vspt real =400, Ixtp real =0.8,

[0126] Substitute the values ​​collected and calculated above into the formula Calculate and get:

[0127] Group 1:

[0128] Group 2:

[0129] Group 3:

[0130] Group 4:

[0131] Group 5:

[0132] Since the preset current value range is between 0.8A-250A, the above current calculation values ​​are within the range, but the power factor is extremely low (especially the power factor of groups 3 and 4 is only 0.1 and 0.2), which indicates that the operation of the equipment is not normal, which may be caused by the motor load being too low or equipment failure, that is, the real-time current of the ship's electrical equipment is in an abnormal working state, and an early warning signal is issued at this time;

[0133] Since the preset power value range is between 900W and 1500W, the power value calculated above is significantly lower than the normal range, especially the output power of the fourth group is 0, indicating that the equipment may be faulty or inefficient, that is, the real-time power of the ship's electrical equipment is in an abnormal working state, and an early warning signal is issued at this time;

[0134] Through the application of the above system, operators can take prompt action at the early stage of ship electrical equipment problems to avoid greater losses and risks. When an abnormality occurs, an early warning signal is sent to the maintenance personnel's communication equipment. The maintenance personnel can initiate the electrical equipment restart command and quickly locate the abnormal position of the electrical equipment without the need for large-scale inspections, thereby improving the maintenance efficiency of electrical equipment and reducing the risk of ship navigation.

[0135] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A remote monitoring system for electrical equipment, characterized in that: It includes electrical parameter acquisition unit, data calculation and analysis unit, abnormal monitoring unit and remote warning unit; The electrical data collection unit is used to collect current data, voltage data, power data and temperature data of ship electrical equipment. The collected data are correspondingly compiled into a current data set, a voltage data set, a power data set and a temperature data set, and sent to the data calculation and analysis unit through wireless transmission; The data calculation and analysis unit performs analysis and calculation based on the current data set, voltage data set, power data set and temperature data set transmitted by the electrical parameter acquisition unit, obtains the standard current value of the ship electrical equipment, the standard voltage value of the ship electrical equipment, the standard power value of the ship equipment and the standard temperature value of the ship equipment, and then sends them to the monitoring abnormality unit for monitoring and analysis; the monitoring abnormality unit is preset with a monitoring analyzer to perform threshold analysis on the standard current value of the ship electrical equipment, the standard voltage value of the ship electrical equipment, the standard power value of the ship equipment and the standard temperature value of the ship equipment. When the monitoring analyzer monitors that the transmitted value exceeds the current, voltage, power and temperature range value of the ship electrical equipment preset by the monitoring analyzer, a corresponding warning signal is issued, wherein the warning corresponding signals of the standard current value of the ship electrical equipment, the standard voltage value of the ship electrical equipment, the standard power value of the ship equipment and the standard temperature value of the ship equipment are Ka, Kb, Kc and Kd respectively, and the generated warning signals Ka, Kb, Kc and Kd are sent to the remote warning unit; After receiving the warning signal, the remote warning unit remotely sends the monitored abnormality of the ship's electrical equipment to the communication equipment of the maintenance personnel.

2. The electrical equipment remote monitoring system according to claim 1, characterized in that: The electrical parameter acquisition unit collects five sets of current data of the ship electrical equipment every second to form a current data set set, and the current data set set is {Dplz n ,Dplz n+1 ,Dplz n+3 ,...,Dplz n+4 }, five sets of voltage data of ship electrical equipment are collected every second to form a voltage data set set, and the voltage data set set is {Dxkz n ,Dxk n+1 ,Dxk n+2 ,...,Dxkz n+4 }, five sets of power data of ship electrical equipment are collected every second to form a power data set set, and the power data set set is {Gxkp n ,Gxkp n+1 ,Gxkp n+2 ,...,Gxkp n+4 }, collect five sets of temperature data of ship electrical equipment every second to form a temperature data set set, the temperature data set set is {Cwkd n ,Cwkd n+1 ,Cwkd n+2 ,...,Cwkd n+4 }.

3. The remote monitoring system for electrical equipment according to claim 2, characterized in that: The calculation formula of the standard current value of the ship electrical equipment is as follows: In the formula, Ixtp real Indicates the standard current value of ship electrical equipment, obtained through current data collection, Represents average power, V sanx Indicates the three-phase voltage, Indicates the phase difference between voltage and current, obtained through the rated parameters of ship equipment. Indicates the conversion relationship between the three phases, is the power factor.

4. The remote monitoring system for electrical equipment according to claim 3, characterized in that: The average power calculation formula is as follows: In the formula, represents the average power, N represents the total number of samples in the power data set, Gxkl i represents the power value at the i-th time point, extracted from the power dataset, means adding all the power data points, Represents the arithmetic mean, which is the sum divided by the number of data points to get the average power value.

5. The remote monitoring system for electrical equipment according to claim 4, characterized in that: The power factor calculation formula is as follows: In the formula, It represents power factor, Yggl represents active power, which is collected through the remote monitoring system of electrical equipment, and Szgl represents apparent power, which is obtained through the nameplate parameters of electrical equipment.

6. The remote monitoring system for electrical equipment according to claim 5, characterized in that: The calculation formula of the standard power value of the ship electrical equipment is as follows: In the formula, Pxqd real Indicates the standard power value of ship electrical equipment, Ixtp real Indicates the standard current value of ship electrical equipment, Vspt real Indicates the effective value of voltage, obtained through the voltage data set, is the power factor, which indicates the phase difference between voltage and current.

7. The remote monitoring system for electrical equipment according to claim 6, characterized in that: The voltage effective value calculation formula is as follows: In the formula, Vspt real Represents the effective value of voltage, T is the signal period, which represents the duration of a complete cycle of the voltage waveform, [V(t)] 2 represents the square of the instantaneous voltage, It means that the average value of the square of the voltage in one cycle is calculated by integration, and dt represents the integral sign.

8. The remote monitoring system for electrical equipment according to claim 7, characterized in that: The calculation formula of the standard voltage value of the ship electrical equipment is as follows: In the formula, Vcxk real Indicates the standard voltage value of ship electrical equipment, Pxqd real Indicates the standard power value of ship electrical equipment, R indicates load resistance, X indicates load reactance, It represents the modulus of the complex impedance, that is, the comprehensive impedance of the load.

9. The electrical equipment remote monitoring system according to claim 8, characterized in that: The calculation formula of the standard temperature value of the ship equipment is as follows: In the formula, Tmpt real Indicates the standard temperature value of ship equipment, T ambient Indicates the ambient temperature around the device measured by the temperature sensor, Pxqd real Indicates the standard power value of ship electrical equipment, R thermxl It represents the thermal resistance of ship equipment, and A represents the heat dissipation area of ​​the equipment.

10. The remote monitoring system for electrical equipment according to claim 9, characterized in that: The conditions for the abnormal monitoring unit to issue an early warning signal are as follows: When the standard current value of ship electrical equipment is Ixtp real When the current is greater than the current range of the ship electrical equipment preset by the monitoring analyzer, the abnormal monitoring unit sends out an early warning signal Ka; When the standard power value of ship electrical equipment is Pxqd real When it is greater than the power range value of the ship electrical equipment preset by the monitoring analyzer, the monitoring abnormality unit sends out a warning signal Kb; When the standard voltage value of ship electrical equipment is Vcxk real When it is greater than the voltage range of the ship electrical equipment preset by the monitoring analyzer, the monitoring abnormality unit sends out an early warning signal Kc; When the standard temperature value of ship equipment Tmpt real When the temperature is greater than the preset temperature range of the ship electrical equipment by the monitoring analyzer, the abnormal monitoring unit will send out an early warning signal Kd.

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