Power utilization rate comprehensive evaluation method based on power system

Abstract

The invention discloses an electric power utilization rate comprehensive evaluation method based on an electric power system, relates to the technical field of electric power systems, and solves the technical problems that a single index or a local link is emphasized, and a one-sidedness evaluation mode is difficult to accurately reflect the real operation condition of the electric power system. By comprehensively acquiring the power equipment information, the energy power generation information and the power utilization condition information, the comprehensive evaluation of the whole process from power generation to power utilization of the power system can be realized, a more comprehensive, accurate and representative power comprehensive evaluation index is obtained, a reliable basis is provided for the overall performance evaluation of the power system, and the power utilization efficiency of the power system is improved. In the evaluation process, abnormal assignments can be rapidly screened out according to different assignments obtained through calculation, and the source and reason of the abnormality are deeply analyzed and determined through comprehensive historical data, and detailed abnormality reason information is generated, so that key guarantee is provided for fault early warning, rapid diagnosis and timely repair of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a comprehensive evaluation method for power utilization based on a power system. Background Art

[0002] With the continuous growth of electricity demand and the increasing complexity of power systems, it becomes crucial to accurately evaluate and optimize the operating efficiency and power utilization of power systems.

[0003] The patent with publication number CN117474410A discloses a new type of power system construction evaluation method based on multi-dimensional features. First, the power system evaluation index, renewable energy utilization rate, power system evaluation index, energy self-sufficiency rate, power system evaluation index, power system evaluation index, power system intelligence level, power system economy and other environmental impacts are constructed. The evaluation system and evaluation formula are constructed, and the area to be evaluated is selected. According to the new power system in the area to be evaluated, key feature data is collected, and the level of key features of the regional power grid is calculated. The data is calculated, and the level of the new power system construction is comprehensively evaluated. Finally, it is determined whether it meets the qualified standards. This new power system construction evaluation method based on multi-dimensional features needs to define the passing value of the new power system construction level score and comprehensively evaluate the new power system construction level of the regional power grid.

[0004] However, traditional power evaluation methods often focus on a single indicator or local links, such as only paying attention to power generation efficiency or individual operating parameters of equipment, and lack a comprehensive and integrated consideration of the entire chain of the power system from power generation, transmission and distribution to power consumption. This one-sided evaluation method is difficult to accurately reflect the actual operating status of the power system, and cannot provide comprehensive and effective guidance for system optimization and upgrading, rational allocation of resources, and fault prevention, limiting the further improvement of the reliability and economy of power system operation. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a comprehensive evaluation method for power utilization based on the power system, which solves the problem that the one-sided evaluation method that focuses on a single indicator or a local link is difficult to accurately reflect the actual operating status of the power system.

[0006] To achieve the above objectives, the present invention is implemented by the following technical scheme: a comprehensive evaluation method for power utilization based on a power system, the method specifically comprising the following steps:

[0007] Step S1: Acquire the corresponding power equipment information in the power system and the corresponding energy generation information and power consumption information of the power system;

[0008] Step S2: Analyze the obtained power equipment information, calculate the equipment utilization value corresponding to the power equipment from the power equipment operation time and equipment load, and assign corresponding values ​​according to the equipment utilization value;

[0009] Step S3: Analyze the obtained energy generation information, calculate the overall energy generation value of the power system according to the power generation efficiency and transmission and distribution efficiency of the power system, and assign values ​​based on the obtained energy generation value;

[0010] Step S4: Analyze the obtained power consumption information, calculate the overall power consumption value of the power system by analyzing the power load situation and power stability in the power system, and assign a value to the power consumption value;

[0011] Step S5: Calculate the comprehensive value of the power system based on the different assigned values ​​obtained, and evaluate the overall power utilization of the power system based on the comprehensive value of the power system to generate evaluation information, and determine the cause of the abnormality of the power system based on the evaluation information.

[0012] As a further solution of the present invention: the specific method of analyzing the power equipment information in step 2 is:

[0013] Obtain all the equipment in the power system and label them as i, where i=1, 2, ..., j, where j represents the number of power equipment, and select a group of power equipment as the target object, obtain the actual operating time and the operable time of the target object, and calculate the corresponding utilization based on the obtained actual operating time and the operable time, and calculate the utilization of all power equipment at the same time, then calculate the average utilization of all power equipment, and record the calculated average as the equipment operation value;

[0014] Then the rated load and actual load of the target object are obtained, and the load rate of the target object is calculated based on the actual load and the rated load. Similarly, the load rate of all power equipment is calculated, and then the average load rate of all power equipment is calculated, and the calculated average is recorded as the equipment load value. At the same time, the obtained equipment operation value and equipment load value are calculated to obtain the equipment utilization value, and then assigned.

[0015] As a further solution of the present invention: the specific method of calculating the equipment operation value and the equipment load value to obtain the equipment utilization value in step 2 is:

[0016] Substitute the calculated equipment operation value and equipment load value into the formula Q=Y×a1+F×a2 to calculate the overall equipment utilization value Q of the power equipment, where Y is the equipment operation value, F is the equipment load value, a1 and a2 are the corresponding weight coefficients, a1+a2=1, and the specific value is set by the operator;

[0017] According to the obtained device utilization value Q, match the matching interval, and determine the corresponding assignment based on the obtained matching result, denoted as G Q .

[0018] As a further solution of the present invention: the specific method of analyzing the energy generation information in step S3 is:

[0019] Obtain the power generation mode of the power system, denoted as n, where n=1, 2, ..., m, where m represents the number of power generation modes, and obtain the energy conversion efficiency corresponding to the power generation mode n, then calculate the average of the energy conversion efficiencies corresponding to all power generation modes, and use the calculated average as the energy conversion value;

[0020] Then, the corresponding output power in the power system and the power (effective power) received by the power user are obtained and recorded as P in and P out , substitute the obtained parameters into the formula The transmission and distribution efficiency η of the power system is calculated and used as the transmission and distribution value of the power system. The energy conversion value and the transmission and distribution value are calculated to obtain the energy generation value and assigned.

[0021] As a further solution of the present invention: the specific method of calculating the energy conversion value and the power transmission and distribution value to obtain the energy generation value in step S4 is:

[0022] The energy conversion value and the power transmission and distribution value obtained by the analysis are summed up to obtain the overall energy generation value of the power system, which is recorded as W. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. W .

[0023] As a further solution of the present invention: the specific method of analyzing the power usage information in step S4 is:

[0024] Analyze the power load of the power system, obtain the load fluctuation difference of the power system within time t, and perform unit time analysis based on time t. At the same time, average the obtained load fluctuation difference to obtain the load fluctuation mean, then calculate the load rate, sum the calculated load fluctuation mean and the load rate and record the value as the load value;

[0025] Then, the electric energy stability of the power system is analyzed, and the unit voltage and current values ​​corresponding to the power system within time t are obtained, and the voltage difference and current difference within time t are calculated. At the same time, the number of fluctuations is determined based on the obtained voltage difference and current difference, and then the fluctuation frequency within time t is calculated. Similarly, the fluctuation frequency of the power system per unit time is calculated, and the average of all fluctuation frequencies is calculated and recorded as the stable value. The power consumption value is calculated based on the obtained load value and stable value, and the value is assigned at the same time.

[0026] As a further solution of the present invention: the specific method of calculating the power consumption value based on the obtained load value and stable value in step S4 is:

[0027] The load value and the stability value are summed to get the power consumption value of the power system, which is recorded as D. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. D .

[0028] As a further solution of the present invention: the specific method of generating the evaluation information and the abnormal reason in step S5 is:

[0029] Get the device utilization value assignment G Q 、Energy generation value assignment G W And the power consumption value G D , and substitute the obtained parameters into the formula PEI = α × G Q +β×G W +σ×G D The power system comprehensive evaluation index PEI is calculated, and then the power comprehensive evaluation index PEI is judged with the comprehensive evaluation interval to generate evaluation information;

[0030] Then, according to the generated evaluation information, the different assignments are analyzed, and the assignments with abnormalities are screened out. At the same time, the corresponding abnormal sources are obtained. Then, based on the comprehensive historical data of the abnormal source, the cause of the abnormality is determined, and the abnormal cause information is generated.

[0031] The present invention provides a comprehensive evaluation method for power utilization based on a power system. Compared with the prior art, it has the following beneficial effects:

[0032] The present invention comprehensively acquires information on power equipment, energy generation and electricity consumption, and conducts detailed analysis and quantitative calculation from multiple dimensions such as equipment utilization value, energy generation value and electricity consumption value. It can achieve a comprehensive evaluation of the entire process of the power system from power generation to power consumption, and obtain a more comprehensive, accurate and representative comprehensive power evaluation index (PEI), which provides a reliable basis for the overall performance evaluation of the power system.

[0033] Secondly, a set of standardized evaluation intervals and assignment systems based on historical data and industry norms have been established, which can not only make horizontal comparisons of different power systems, but also conduct longitudinal tracking and evaluation of different operating periods of the same power system, which helps to timely discover the advantages and disadvantages in system operation and provide strong support for the formulation of accurate optimization strategies and resource allocation plans.

[0034] Furthermore, during the evaluation process, abnormal assignments can be quickly screened out based on the different assignments obtained by calculation, and the source and cause of the abnormality can be determined through in-depth analysis of comprehensive historical data, generating detailed abnormal cause information, which provides key guarantees for fault warning, rapid diagnosis and timely repair of the power system, improves the operational reliability and stability of the power system, reduces operation and maintenance costs, and promotes the sustainable development and efficient utilization of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a step method diagram of the present invention;

[0036] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] For example, see Figure 1 and Figure 2 The present application provides a comprehensive evaluation method for power utilization based on a power system, which specifically includes the following steps:

[0039] Step S1: Obtain the corresponding power equipment information in the power system and the energy generation information and power consumption information of the power system. The specific power equipment information mainly includes the corresponding power equipment used and the operating time of the power equipment. The power consumption information mainly includes the power consumption time and the power stability during the power consumption process.

[0040] Step S2: Analyze the obtained power equipment information, calculate the equipment utilization value corresponding to the power equipment from the power equipment operation time and equipment load, and assign corresponding values ​​according to the equipment utilization value.

[0041] Obtain all the equipment of the power system and label them as i, and i=1, 2, ..., j, where j represents the number of power equipment, and select a group of power equipment as the target object, obtain the actual operation time and the operable time of the target object, and the operable time is represented as the sum of the time when the equipment can operate normally under ideal conditions, and the specific time sum is set by the operator, and the operable time here is the operation time within a day, and calculate the corresponding utilization rate based on the obtained actual operation time and operable time, and the specific calculation method is actual operation time ÷ operable time = utilization rate, for example, for a server, if it can theoretically operate for 8760 hours all year round, and actually operates for 7000 hours, its utilization rate is measured by calculating (7000÷8760)×100%≈80%, and the utilization rate of all power equipment is calculated at the same time, and then the corresponding utilization rate of all power equipment is calculated. The average value, and the calculated average value is recorded as the equipment operation value;

[0042] Then, the rated load and actual load of the target object are obtained, and the rated load indicates the maximum load capacity of the equipment that can operate safely and stably for a long time as specified during design and manufacturing. The load rate of the target object is calculated based on the actual load and the rated load, and the specific calculation formula is load rate = actual load ÷ rated load. Similarly, the load rate of all power equipment is calculated, and then the average load rate of all power equipment is calculated, and the calculated average value is recorded as the equipment load value;

[0043] For example, the rated load of a motor is 50 kilowatts. During actual operation, the actual load measured by the power monitoring equipment is 30 kilowatts. According to the formula load rate = actual load ÷ rated load, the load rate of the motor = 30 ÷ 50 = 0.6 (i.e. 60%). The load rates of all power equipment are calculated one by one in the same way. Suppose there are 5 power equipments, and their load rates are 0.6, 0.5, 0.7, 0.4, and 0.8 respectively. The sum of these load rates is 3, and then divided by the number of equipment 5, the average load rate of all power equipment is calculated to be 0.6.

[0044] Substitute the calculated equipment operation value and equipment load value into the formula Q=Y×a1+F×a2 to calculate the overall equipment utilization value Q of the power equipment, where Y is the equipment operation value, F is the equipment load value, a1 and a2 are the corresponding weight coefficients, a1+a2=1, and the specific value is set by the operator.

[0045] For example, the equipment operation value Y in a specific area of ​​a power system is 0.7, and the equipment load value is 0.6. At the same time, based on a comprehensive analysis of factors such as the characteristics of the power equipment in the area, historical operation data, and current operation priorities, a1=0.6, a2=0.4 are set, and the equipment utilization value Q=0.64 is calculated according to the calculation formula.

[0046] The obtained equipment utilization value Q is matched with the matching interval, and the specific value range of the matching interval is set by the operator, which is obtained by comprehensive analysis of historical data, and the corresponding assignment is determined based on the obtained matching result and recorded as G Q ,

[0047] For example, by analyzing historical data, the corresponding matching interval is determined. If Q ≥ 0.9, it is classified as efficient utilization; if 0.7 ≤ Q < 0.9, it is classified as normal utilization; if 0.5 ≤ Q < 0.7, it is classified as utilization to be improved; if Q < 0.5, it is classified as inefficient utilization. The value of 4 is assigned to the equipment in the efficient utilization interval, 3 is assigned to the normal utilization interval, 2 is assigned to the interval to be improved, and 1 is assigned to the inefficient utilization interval.

[0048] Based on the above calculated equipment utilization value of 0.64, the further classification is that the utilization needs to be improved. At the same time, based on different assignments, the corresponding assignment for the current power system is 2. Further G Q =2.

[0049] Step S3: Analyze the obtained energy generation information, calculate the overall energy generation value of the power system according to the power generation efficiency and transmission and distribution efficiency of the power system, and assign values ​​based on the obtained energy generation value.

[0050] Obtain the power generation mode of the power system, denoted as n, where n=1, 2, ..., m, where m represents the number of power generation modes, and obtain the energy conversion efficiency corresponding to the power generation mode n, then calculate the average of the energy conversion efficiencies corresponding to all power generation modes, and use the calculated average as the energy conversion value;

[0051] For example, a power system includes three power generation methods: thermal power generation, hydropower generation, and wind power generation. At this time, m=3, and the corresponding power generation methods are marked as n=1 (thermal power generation), n=2 (hydropower generation), and n=3 (wind power generation). Then, the energy conversion efficiency corresponding to each power generation method is accurately obtained. After measuring that the energy conversion efficiency of thermal power generation is 0.35 (i.e. 35%), the energy conversion efficiency of hydropower generation is 0.4 (i.e. 40%), and the energy conversion efficiency of wind power generation is 0.3 (i.e. 30%). Then, according to the formula Calculate the energy conversion value;

[0052] Then, the corresponding output power in the power system and the power (effective power) received by the power user are obtained and recorded as P in and P out , substitute the obtained parameters into the formula The power transmission and distribution efficiency η of the power system is calculated and used as the power transmission and distribution value of the power system;

[0053] For example, the power output of the power station is 1000kW. After being transmitted through the transmission and distribution lines, the power received by the user is 950kW. According to the corresponding formula, the transmission and distribution efficiency of the power system is calculated to be 95%, and the transmission and distribution value is further obtained to be 0.95.

[0054] The energy conversion value and the power transmission and distribution value obtained by the analysis are summed up to obtain the overall energy generation value of the power system, which is recorded as W. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. W ;

[0055] Assume that the matching intervals are set as follows: when W>1.5, it is an efficient power consumption interval; when 1.2≤W<1.5, it is a normal power consumption interval; when W<1.2, it is an inefficient power consumption interval. Taking the above-calculated power consumption value W=1.37 as an example, based on such matching results, the corresponding assignments are further determined. For example, in the power system operation efficiency evaluation system or the power resource allocation strategy model, the efficient power consumption interval can be assigned a value of 4, the normal power consumption interval can be assigned a value of 3, and the inefficient power consumption interval can be assigned a value of 2.

[0056] Step S4: Analyze the obtained power consumption information, calculate the overall power consumption value of the power system by analyzing the power load situation and power stability in the power system, and assign a value to the power consumption value.

[0057] Analyze the power load of the power system, obtain the load fluctuation difference within the time t of the power system, and the specific value of time t is set by the operator, and perform unit time analysis based on time t, and the unit time here is expressed as one day (24 hours), and at the same time, calculate the average of the obtained load fluctuation difference to obtain the load fluctuation average, and then calculate the load rate, and the load rate = actual load ÷ rated load, and sum the calculated load fluctuation average with the load rate and record the value as the load value;

[0058] Assume that within these 24 hours, the load data per hour (unit: kilowatt) are: 100, 120, 110, 90, 130, 140, 135, 125, 115, 105, 100, 110, 120, 130, 140, 130, 120, 110, 100, 90, 100, 110, 120, 130. Then the load fluctuation differences in adjacent hours are: 20, -10, -20, 40, 10, -5, -10, -10, -10, 5, 10, 10, 10, 10, -10, -10, -10, 10, 10, 10, 10, 10, 10, then, the average of these load fluctuation differences is calculated, that is, the load fluctuation average is 1.25, and at the same time, the load rate is calculated. Assuming that the rated load of the power system is 200 kilowatts, and the average actual load within these 24 hours is 120 kilowatts, then the load factor = 120 ÷ 200 = 0.6. Finally, summing the load fluctuation mean and the load factor, we get the load value = 1.25 + 0.6 = 1.85.

[0059] Then, the electric energy stability of the power system is analyzed, the unit voltage value and current value corresponding to the power system within the time t are obtained, and the voltage difference and current difference within the time t are calculated. At the same time, the number of fluctuations is determined based on the obtained voltage difference and current difference. The number of fluctuations here is expressed as the number of times the voltage difference and current difference exceed the preset value. The specific value of the preset value is set by the operator. Then, the fluctuation frequency within the time t is calculated. Similarly, the fluctuation frequency of the power system per unit time is calculated, and the average of all fluctuation frequencies is calculated and recorded as the stability value;

[0060] The load value and the stability value are summed to get the power consumption value of the power system, which is recorded as D. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. D The specific assignment method here is the same as the assignment process of the above steps S2 and S3.

[0061] Step S5: Calculate the comprehensive value of the power system based on the different assigned values ​​obtained, and evaluate the overall power utilization of the power system based on the comprehensive value of the power system to generate evaluation information, and determine the cause of the abnormality of the power system based on the evaluation information.

[0062] Get the device utilization value assignment G Q 、Energy generation value assignment G W And the power consumption value G D , and substitute the obtained parameters into the formula PEI = α × G Q +β×G W +σ×G DThe power comprehensive evaluation index PEI of the power system is calculated, and then the power comprehensive evaluation index PEI is judged against the comprehensive evaluation interval. The specific value of the comprehensive evaluation interval here is set by the operator, and the evaluation information is generated; for example, the operator sets three comprehensive evaluation intervals based on a large amount of past data and industry specifications: when PEI ≥ 0.8, it is defined as an excellent power system interval; when 0.5 ≤ PEI < 0.8, it is defined as a good power system interval; when PEI < 0.5, it is determined as a power system interval to be optimized.

[0063] Then, according to the generated evaluation information, the different assignments are analyzed, and the assignments with abnormalities are screened out. At the same time, the corresponding abnormal sources are obtained. Then, based on the comprehensive historical data of the abnormal source, the cause of the abnormality is determined, and the abnormal cause information is generated.

[0064] For example, if it is found that the equipment utilization value of a key transformer is assigned a low value, through comprehensive historical data, it is found that the transformer has had multiple oil temperature overtemperature alarms in the past year and the load rate has been at a low level for a long time. Combined with the maintenance records showing that no comprehensive inspection and maintenance have been carried out recently, it can be determined that the cause of the abnormality is equipment aging and lack of effective maintenance, and then detailed abnormal cause information is generated, such as "A key transformer has not been maintained in time due to long-term operation, and the equipment has seriously aged, resulting in its low equipment utilization value, affecting the overall operating efficiency of the power system. It is recommended to immediately arrange a comprehensive inspection and performance evaluation, and formulate targeted maintenance plans to improve equipment utilization efficiency."

[0065] Embodiment 2: This embodiment is implemented on the basis of Embodiment 1, and the difference from Embodiment 1 is as follows:

[0066] The calculation method of the power transmission and distribution efficiency in step S3 is different. In this embodiment, the corresponding efficiency analysis is performed based on the line loss, and the specific analysis method is: obtain the line loss and record it as P loss , and the line loss is mainly due to the heat loss generated by the resistance of the transmission line, and the line loss is calculated according to the formula P loss =I 2 R is calculated, where I is the current of the transmission line, R is the resistance of the transmission line, and further according to the formula P out =P in -P loss The corresponding received power is calculated, and the power transmission and distribution efficiency is calculated according to the formula in step three.

[0067] For example, the resistance of a transmission line is R = 1Ω, the transmission current is I = 10A, and the output power P at the generator end is in =100kW, first calculate the line loss power P loss =I 2R=(10) 2 x1=100W=0.1kW, then P out =P in -P loss =100-0.1=99.9kW, transmission efficiency 99.9%.

[0068] Embodiment 3, as the embodiment 3 of the present invention, focuses on combining the implementation processes of embodiment 1 and embodiment 2 for implementation.

[0069] Some of the data in the above formulas are dimensionless and numerically calculated. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0070] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A comprehensive evaluation method for power utilization based on a power system, characterized in that: The method specifically comprises the following steps: Step S1: Acquire the corresponding power equipment information in the power system and the corresponding energy generation information and power consumption information of the power system; Step S2: Analyze the obtained power equipment information, calculate the equipment utilization value corresponding to the power equipment from the power equipment operation time and equipment load, and assign corresponding values ​​according to the equipment utilization value; Step S3: Analyze the obtained energy generation information, calculate the overall energy generation value of the power system according to the power generation efficiency and transmission and distribution efficiency of the power system, and assign values ​​based on the obtained energy generation value; Step S4: Analyze the obtained power consumption information, calculate the overall power consumption value of the power system by analyzing the power load situation and power stability in the power system, and assign a value to the power consumption value; Step S5: Calculate the comprehensive value of the power system based on the different assigned values ​​obtained, and evaluate the overall power utilization of the power system based on the comprehensive value of the power system to generate evaluation information, and determine the cause of the abnormality of the power system based on the evaluation information.

2. The comprehensive evaluation method for power utilization based on the power system according to claim 1 is characterized in that: The specific method of analyzing the power equipment information in step 2 is: Obtain all the equipment in the power system and label them as i, where i=1, 2, ..., j, where j represents the number of power equipment, and select a group of power equipment as the target object, obtain the actual operating time and the operable time of the target object, and calculate the corresponding utilization based on the obtained actual operating time and the operable time, and calculate the utilization of all power equipment at the same time, then calculate the average utilization of all power equipment, and record the calculated average as the equipment operation value; Then the rated load and actual load of the target object are obtained, and the load rate of the target object is calculated based on the actual load and the rated load. Similarly, the load rate of all power equipment is calculated, and then the average load rate of all power equipment is calculated, and the calculated average is recorded as the equipment load value. At the same time, the obtained equipment operation value and equipment load value are calculated to obtain the equipment utilization value, and then assigned.

3. The comprehensive evaluation method for power utilization based on the power system according to claim 2 is characterized in that: The specific method of calculating the equipment operation value and the equipment load value to obtain the equipment utilization value in step 2 is: Substitute the calculated equipment operation value and equipment load value into the formula Q=Y×a1+F×a2 to calculate the overall equipment utilization value Q of the power equipment, where Y is the equipment operation value, F is the equipment load value, a1 and a2 are the corresponding weight coefficients, a1+a2=1, and the specific value is set by the operator; According to the obtained device utilization value Q, match the matching interval, and determine the corresponding assignment based on the obtained matching result, denoted as G Q .

4. The comprehensive evaluation method for power utilization based on the power system according to claim 1 is characterized in that: The specific method of analyzing the energy generation information in step S3 is: Obtain the power generation mode of the power system, denoted as n, where n=1, 2, ..., m, where m represents the number of power generation modes, and obtain the energy conversion efficiency corresponding to the power generation mode n, then calculate the average of the energy conversion efficiencies corresponding to all power generation modes, and use the calculated average as the energy conversion value; Then, the corresponding output power in the power system and the power received by the power user are obtained and recorded as P in and P out , substitute the obtained parameters into the formula The transmission and distribution efficiency η of the power system is calculated and used as the transmission and distribution value of the power system. The energy conversion value and the transmission and distribution value are calculated to obtain the energy generation value and assigned.

5. The comprehensive evaluation method for power utilization based on the power system according to claim 4 is characterized in that: The specific method of calculating the energy conversion value and the power transmission and distribution value to obtain the energy generation value in step S4 is: The energy conversion value and the power transmission and distribution value obtained by the analysis are summed up to obtain the overall energy generation value of the power system, which is recorded as W. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. W .

6. The comprehensive evaluation method for power utilization based on the power system according to claim 1 is characterized in that: The specific method of analyzing the power usage information in step S4 is: Analyze the power load of the power system, obtain the load fluctuation difference of the power system within time t, and perform unit time analysis based on time t. At the same time, average the obtained load fluctuation difference to obtain the load fluctuation mean, then calculate the load rate, sum the calculated load fluctuation mean and the load rate and record the value as the load value; Then, the electric energy stability of the power system is analyzed, and the unit voltage and current values ​​corresponding to the power system within time t are obtained, and the voltage difference and current difference within time t are calculated. At the same time, the number of fluctuations is determined based on the obtained voltage difference and current difference, and then the fluctuation frequency within time t is calculated. Similarly, the fluctuation frequency of the power system per unit time is calculated, and the average of all fluctuation frequencies is calculated and recorded as the stable value. The power consumption value is calculated based on the obtained load value and stable value, and the value is assigned at the same time.

7. The comprehensive evaluation method for power utilization based on the power system according to claim 6 is characterized in that: The specific method of calculating the power consumption value based on the obtained load value and stability value in step S4 is: The load value and the stability value are summed to get the power consumption value of the power system, which is recorded as D. At the same time, the power consumption value is matched with the matching interval, and the corresponding assignment is determined according to the matching result, which is recorded as G. D .

8. The comprehensive evaluation method for power utilization based on the power system according to claim 1 is characterized in that: The specific method of generating the evaluation information and the abnormal reason in step S5 is: Get the device utilization value assignment G Q 、Energy generation value assignment G W And the power consumption value G D , and substitute the obtained parameters into the formula PEI = α × G Q +β×G W +σ×G D The power system comprehensive evaluation index PEI is calculated, and then the power comprehensive evaluation index PEI is judged with the comprehensive evaluation interval to generate evaluation information; Then, according to the generated evaluation information, the different assignments are analyzed, and the assignments with abnormalities are screened out. At the same time, the corresponding abnormal sources are obtained. Then, based on the comprehensive historical data of the abnormal source, the cause of the abnormality is determined, and the abnormal cause information is generated.

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