CN118100179A - Method, system, equipment and medium for evaluating bearing capacity of distributed power supply - Google Patents
Method, system, equipment and medium for evaluating bearing capacity of distributed power supply Download PDFInfo
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Abstract
The method is based on the actual condition of the distributed power supply in a power distribution network, a distributed power supply bearing capacity assessment model comprising a bearing capacity assessment model based on voltage fluctuation is constructed, and the maximum bearing capacity of the distributed power supply access distribution network is obtained by solving the calculation formulas based on voltage loss, line current carrying and voltage fluctuation and reversely pushing to obtain the access capacity of three indexes at a control critical point. According to the invention, the requirement of the power grid on the running control value of the distributed power supply is referred, the running index of voltage fluctuation is increased on the basis of the two running indexes of voltage loss and line current carrying, the maximum bearing capacity of the distributed power supply in the distribution network is estimated, accurate tide simulation is not needed, the calculation is convenient and quick, the model is simple and visual, and the method is suitable for engineering operation when the power grid is planned and detailed data is lacking.
Description
Technical Field
The invention belongs to the technical field of power distribution network planning, and particularly relates to a method, a system, equipment and a storage medium for evaluating the bearing capacity of a distributed power supply.
Background
Along with the promotion of "two carbon" policy and the deepening of novel distribution network construction, a large amount of high permeability's distributed photovoltaic power supply inserts the distribution network, but because distributed power supply receives solar radiation intensity's influence, when its former topological structure and trend direction change, distributed power supply's output characteristic has also influenced the electric energy quality of electric wire netting, can constitute harm to whole electric wire netting system when serious, so develop the bearing capacity evaluation work of distributed power supply in the novel distribution network very necessary.
At present, the load capacity assessment of a distributed power supply mainly comprises two major types of tide simulation and simplified assessment, wherein the tide simulation needs a large amount of system data, including complete network topology, parameters of each operation device, load size, distribution condition and the like, the data entry work is complicated, and the maintenance workload is large; the existing bearing capacity simplification evaluation method is not comprehensive enough in consideration of the influence factors of the distributed power supply, and cannot adapt to the future development trend of gradually increasing the permeability of the distributed power supply.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a method, a system, equipment and a storage medium for evaluating bearing capacity by considering more comprehensive influence factors of a distributed power supply.
In order to achieve the above object, the technical scheme of the present invention is as follows:
in a first aspect, the present invention provides a method for evaluating a bearing capacity of a distributed power supply, including:
S1, constructing a bearing capacity evaluation model of a distributed power supply, wherein the model comprises a bearing capacity evaluation model based on voltage fluctuation;
S2, solving a bearing capacity evaluation model of the distributed power supply to obtain the maximum bearing capacity of the distributed power supply connected to the distribution network.
In the step S1, the load bearing capacity evaluation model based on voltage fluctuation is as follows:
；
In the above-mentioned method, the step of, For the bearing capacity calculation based on voltage fluctuation,/>For voltage fluctuations caused by distributed power supplies,/>Rated voltage of line,/>For the ratio of the instantaneous change of the output power of the distributed power supply to the rated output power,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modeResistance per unit length of line,/>Is the length of the main line.
In the step S1, the load-bearing capacity evaluation model of the distributed power supply is as follows:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the calculation of the load capacity based on the voltage loss,For the bearing capacity calculation based on voltage fluctuation,/>Is calculated as a load bearing capacity based on line current carrying.
The bearing capacity evaluation model of the distributed power supply further comprises a bearing capacity evaluation model based on voltage loss and a bearing capacity evaluation model based on line current carrying;
The load capacity evaluation model based on the voltage loss is as follows:
；
The load capacity evaluation model based on line current carrying is as follows:
；
In the above-mentioned method, the step of, For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted by load lines,/>、/>Resistance, reactance, respectively, of line unit length,/>For the length of the line trunk,/>Rated voltage of line,/>Is the loss percentage of line voltage,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modePower factor angle of distributed power supply,/>A current value is continuously allowed for the line.
In a second aspect, the invention provides a bearing capacity evaluation system of a distributed power supply, which comprises a bearing capacity evaluation model construction module and a model solving module;
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the distributed power supply, and the model comprises a bearing capacity evaluation model based on voltage fluctuation;
The model solving module is used for solving a bearing capacity evaluation model of the distributed power supply to obtain the maximum capacity which can be borne by the distributed power supply when the distributed power supply is connected to the distribution network.
The bearing capacity evaluation model construction module comprises a bearing capacity evaluation model unit based on voltage fluctuation;
the bearing capacity evaluation model unit based on voltage fluctuation is used for constructing the following bearing capacity evaluation model based on voltage fluctuation:
；
In the above-mentioned method, the step of, For the bearing capacity calculation based on voltage fluctuation,/>For voltage fluctuations caused by distributed power supplies,/>Rated voltage of line,/>For the ratio of the instantaneous change of the output power of the distributed power supply to the rated output power,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modeResistance per unit length of line,/>Is the length of the main line.
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the following distributed power supply:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the calculation of the load capacity based on the voltage loss,For the bearing capacity calculation based on voltage fluctuation,/>Is calculated as a load bearing capacity based on line current carrying.
The bearing capacity evaluation model building module further comprises a bearing capacity evaluation model unit based on voltage loss and a bearing capacity evaluation model unit based on line current carrying;
the voltage loss-based bearing capacity evaluation model unit is used for constructing the following voltage loss-based bearing capacity evaluation model:
；
The line current carrying-based bearing capacity evaluation model unit is used for constructing the following line current carrying-based bearing capacity evaluation model:
；
In the above-mentioned method, the step of, For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted by load lines,/>、/>Resistance, reactance, respectively, of line unit length,/>For the length of the line trunk,/>Rated voltage of line,/>Is the loss percentage of line voltage,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modePower factor angle of distributed power supply,/>A current value is continuously allowed for the line.
In a third aspect, the present invention provides a device for evaluating the bearing capacity of a distributed power supply, including a processor and a memory;
the memory is used for storing computer program codes and transmitting the computer program codes to the processor;
the processor is configured to execute the method for evaluating the bearing capacity of the distributed power supply according to the instructions in the computer program code.
In a fourth aspect, the present invention provides a computer storage medium having a computer program stored thereon;
The computer program, when executed by a processor, implements the steps of a method for evaluating the load bearing capacity of a distributed power supply described above.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention relates to a method, a system, equipment and a medium for evaluating the bearing capacity of a distributed power supply. According to the method, the requirement of the power grid on the running control value of the distributed power supply is referred, the voltage fluctuation index is used as an input parameter, and the method is suitable for the development trend that the permeability of the distributed power supply in the power distribution network is gradually improved.
2. The invention relates to a method, a system, equipment and a medium for evaluating the bearing capacity of a distributed power supply. The maximum bearing capacity of the distributed power supply in the distribution network is estimated approximately, accurate tide simulation is not needed, calculation is convenient and quick, a model is simple and visual, and the method is suitable for engineering operation when a power grid is planned and detailed data is lacking.
Drawings
FIG. 1 is an overall flow chart of the method of the present invention.
Fig. 2 is a block diagram of the system of the present invention.
Fig. 3 is a structural view of the apparatus described in embodiment 3.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings.
The invention provides a method, a system, equipment and a storage medium for evaluating the bearing capacity of a distributed power supply, which are based on the actual condition of the distributed power supply in a power distribution network, give out the assumption condition of a simplified bearing capacity evaluation model, increase the running index of voltage fluctuation on the basis of two running indexes of voltage loss and line current carrying, refer to the requirement of a power grid on the running control value of the power grid, consider the influence on the bearing capacity of the power distribution network under different line distribution conditions, and respectively obtain the access capacity of the distributed power supply with three indexes at control critical points based on the inverse pushing of a voltage loss, line current carrying and voltage fluctuation calculation formula, and take the smaller capacity value as the maximum capacity of the access distribution network, namely the maximum capacity which can be borne by the access distribution network of the distributed power supply.
Example 1:
In the embodiment, an area to be evaluated is taken as a study object, basic parameters in the area are shown in tables 1 and 2, a proper voltage fluctuation control value, a voltage loss percentage control value, a control critical point such as a line continuous allowable maximum current and the like of the area are determined, then the control critical point is obtained by substituting a model, and a distributed power access capacity of the control critical point is obtained, and a capacity smaller value is taken as a final bearing capacity evaluation value;
Table 1 basic data value 1 of evaluation area
；
Table 2 basic data value 2 of evaluation area
。
As shown in fig. 1, a method for evaluating the bearing capacity of a distributed power supply is sequentially performed according to the following steps:
1. Providing a simplified assumption condition of a bearing capacity evaluation model by combining the actual condition of a distributed power supply in the power distribution network;
The power capacity and the load power of the distributed power supply are assumed to be distributed along the line according to the same rule, namely all the distributed power supplies and loads on the line have the same power factor; the normal running power distribution network line is equivalent to a single power supply radial structure, and because the length of the power distribution network line is shorter and the voltage level is lower, mutual inductance between the lines and line-to-ground distributed capacitance can be omitted when the bearing capacity of the power distribution network line is analyzed, and only the impedance of the line is considered; the system above the distribution bus is equivalent to an infinite power system, and the bus voltage of the distribution network is approximate to rated voltage Un in analysis;
Typical load and distributed power supply profiles include uniform, incremental, decremental, end-concentrated, and middle heavier profiles of 5 types; the distribution of the different loads and the distributed power supply will influence the distribution of the line voltage, wherein: uniformly distributed, voltage loss coefficient Taking 0.5; increasing distribution, voltage loss coefficient/>Taking 0.67; decreasing distribution, voltage loss coefficient/>Taking 0.33; terminal concentrated distribution, voltage loss coefficient/>Taking 1; middle heavy distribution, voltage loss coefficient/>Taking 0.5.
2. According to three indexes of voltage fluctuation, voltage loss and line current carrying, accessing capacity of the distributed power supply at a control critical point, and constructing a bearing capacity evaluation model of the distributed power supply by taking a smaller capacity value;
The load capacity evaluation model of the distributed power supply is as follows:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the calculation of the load capacity based on the voltage loss,For the bearing capacity calculation based on voltage fluctuation,/>Calculating a load capacity value based on line current carrying;
The output of the distributed power supply is influenced by primary energy sources (such as wind speed, illumination intensity and the like), geographical distribution, climate, weather and other factors, and obvious voltage fluctuation can be generated; based on voltage fluctuation caused by a distributed power supply, a voltage fluctuation calculation formula is established, a bearing capacity evaluation model based on voltage fluctuation is obtained through back-pushing, namely the bearing capacity evaluation model based on voltage fluctuation can be directly established, the maximum bearing capacity meeting the voltage fluctuation is rapidly obtained, rapid estimation is conveniently carried out by related personnel in a medium-voltage distribution network planning stage when detailed data are lacking, and the maximum bearing capacity of a region is determined;
for feeder mains, the voltage ripple caused solely by the distributed power supply is calculated using the following formula:
；
In the above-mentioned method, the step of, For voltage fluctuations caused by distributed power supplies,/>For the ratio of the instantaneous change of the output power of the distributed power supply to the rated output power,/>For voltage loss of feeder main line,/>For the line rated voltage (kV),For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution mode、/>Active power and reactive power respectively transmitted by distributed power supply lines,/>、/>Resistance, reactance, respectively,/>, of the lineFor the bearing capacity calculation based on voltage fluctuation,/>、/>Resistance, reactance (/ >) of each line unit length），/>Power factor angle of distributed power supply,/>Is the line trunk length (km);
thus, the load capacity assessment model based on voltage fluctuations can be expressed as:
；
In the above-mentioned method, the step of, For voltage fluctuations caused by distributed power sources, the control values thereof can be subject to classification constraints according to different fluctuation frequencies and voltage classes: when the fluctuation frequency r is less than or equal to 1 time/h, the low-voltage and medium-voltage fluctuation control value is taken as 4%, and the high-voltage fluctuation control value is taken as 3%; when the fluctuation frequency r is more than 1 and less than or equal to 10 times/h, the fluctuation control value of the low voltage and the medium voltage is 3 percent, and the fluctuation control value of the high voltage is 2.5 percent; when the fluctuation frequency r is more than 10 and less than or equal to 100 times/h, the fluctuation control value of the low voltage and the medium voltage is 2 percent, and the fluctuation control value of the high voltage is 1.5 percent; when the fluctuation frequency r is 100 < 1000 times/h, the fluctuation control value of the low voltage and the medium voltage is 1.25%, and the fluctuation control value of the high voltage is 1%;
Based on voltage offset in the distributed power supply, a voltage loss simplified calculation formula is established, and a bearing capacity evaluation model based on the voltage loss is obtained through back-pushing:
The voltage loss is related to the type and length of the line, the transmission power of the line and the power distribution condition, when the load and the power of the power supply are distributed along the line, the voltage loss coefficient under the same distribution is consistent The same size, at this time, the line terminal voltage is highest; when the type and the length of the line are determined, the voltage loss is in direct proportion to the transmission power of the line, the transmission power is determined by the load power and the power generation power of the power supply, the terminal voltage loss under the action of the load power and the power generation power of the power supply can be calculated respectively based on an superposition method, and the comprehensive loss is obtained through accumulation;
In the case of omitting the voltage loss transverse component, the voltage loss simplified calculation formula on the feeder main line includes:
；
；
；
；
In the above-mentioned method, the step of, To correspond to the voltage loss coefficient under a certain typical load or power supply power distribution mode, the voltage loss opposite folding loss of different distribution modes relative to the terminal concentrated distribution mode is reflected、/>Active power, reactive power (kW, kVAR) respectively delivered to the line,/>、/>Resistance, reactance, respectively,/>, of the lineFor the bearing capacity on the backbone,/>Is the power factor angle,/>For terminal voltage loss under load power,/>For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted for line load,/>For terminal voltage loss under the action of power generation power of power supply,/>For the bearing capacity calculation based on voltage loss,/>A power factor angle of the distributed power supply;
thus, the load-bearing capacity assessment model based on voltage loss can be expressed as:
；
In the above-mentioned method, the step of, The control value of the voltage loss is restrained according to the urban network and the rural network respectively; taking the voltage loss percentage control value of each stage of the urban network as an example, the voltage loss percentage control value of a 110kV or 66kV transformer is 2-5%, the voltage loss percentage control value of a 110kV or 66kV line is 4.5-7%, the voltage loss percentage control value of a35 kV transformer is 2-4.5%, the voltage loss percentage control value of a35 kV line is 2.5-5%, the voltage loss percentage control value of a 20kV or 10kV distribution transformer is 2-4%, the voltage loss percentage control value of a 20kV or 10kV line is 2-4%, and the voltage loss percentage control value of a low-voltage line is 4-6%; taking the control value of the voltage loss percentage of each stage of the rural power grid as an example, the control value of the voltage loss percentage of 110kV is less than 5%, the control value of the voltage loss percentage of 35/66kV is about 5%, the control value of the voltage loss percentage of 10kV is 3% -5%, and the control value of the voltage loss percentage of 0.38kV is less than 7%;
Based on line current carrying in the distributed power supply, establishing a line current carrying calculation formula, and reversely deriving to obtain a line current carrying-based bearing capacity evaluation model:
the bearing capacity and the line continuous allowable current value have the following relation:
；
In the above-mentioned method, the step of, For calculating the bearing capacity based on line current carrying,/>The continuously allowable current value of the line, namely the allowable current capacity (A) of the line, is considered to be 1 in consideration of the fact that the power factor of the distributed power supply is high;
Thus, the line current carrying based load capacity assessment model can be expressed as:
；
In the above-mentioned method, the step of, For the continuous allowable current value of the line, namely the allowable current capacity of the line, the control value (the ambient temperature is 25 ℃) can be classified and restrained according to the type of the wire: when the wire model is LGJ-50, the line continues to allow current 220A; when the wire model is LGJ-70, the line continues to allow current 275A; when the wire model is LGJ-95, the line continues to allow current 335A; when the wire model is LGJ-120, the line continues to allow current 380A; when the wire model is LGJ-150, the line continues to allow current 445A; when the wire model is LGJ-240, the line continues to allow current 610A; when the wire model is LGJ-300, the line continues to allow current 700A; when the wire model is LGJ-400, the line continues to allow current 800A; when the wire model is LGJ-500, the wire continues to allow current 966A; when the wire model is LGJ-600, the line continues to allow current 1090A.
3. Solving a bearing capacity evaluation model of the distributed power supply to obtain a final bearing capacity evaluation value which can be borne by the distributed power supply access distribution network under the limitation of voltage loss, line current carrying and voltage fluctuation of the region as shown in table 3;
table 3 maximum load bearing evaluation value of evaluation area
。
Example 2:
As shown in fig. 2, a system for evaluating the bearing capacity of a distributed power supply includes a model building module for evaluating the bearing capacity and a model solving module;
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the distributed power supply, and the model comprises a bearing capacity evaluation model based on voltage fluctuation;
The model solving module is used for solving a bearing capacity evaluation model of the distributed power supply to obtain the maximum capacity which can be borne by the distributed power supply when the distributed power supply is connected to the distribution network.
The bearing capacity evaluation model construction module comprises a bearing capacity evaluation model unit based on voltage fluctuation;
the bearing capacity evaluation model unit based on voltage fluctuation is used for constructing the following bearing capacity evaluation model based on voltage fluctuation:
；
In the above-mentioned method, the step of, For the bearing capacity calculation based on voltage fluctuation,/>For voltage fluctuations caused by distributed power supplies,/>Rated voltage of line,/>For the ratio of the instantaneous change of the output power of the distributed power supply to the rated output power,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modeResistance per unit length of line,/>Is the length of the main line.
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the following distributed power supply:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the calculation of the load capacity based on the voltage loss,For the bearing capacity calculation based on voltage fluctuation,/>Is calculated as a load bearing capacity based on line current carrying.
The bearing capacity evaluation model building module further comprises a bearing capacity evaluation model unit based on voltage loss and a bearing capacity evaluation model unit based on line current carrying;
the voltage loss-based bearing capacity evaluation model unit is used for constructing the following voltage loss-based bearing capacity evaluation model:
；
The line current carrying-based bearing capacity evaluation model unit is used for constructing the following line current carrying-based bearing capacity evaluation model:
；
In the above-mentioned method, the step of, For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted by load lines,/>、/>Resistance, reactance, respectively, of line unit length,/>For the length of the line trunk,/>Rated voltage of line,/>Is the loss percentage of line voltage,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modePower factor angle of distributed power supply,/>A current value is continuously allowed for the line.
Example 3:
As shown in fig. 3, a device for evaluating the bearing capacity of a distributed power supply includes a processor and a memory; the memory is used for storing computer program codes and transmitting the computer program codes to the processor; the processor is configured to execute the method for evaluating the load capacity of a distributed power supply according to embodiment 1 according to instructions in the computer program code.
Example 4:
A computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method for evaluating the load capacity of a distributed power supply according to the present aspect.
Claims (10)
1. A method for evaluating the bearing capacity of distributed power supply is characterized in that,
The method comprises the following steps:
S1, constructing a bearing capacity evaluation model of a distributed power supply, wherein the model comprises a bearing capacity evaluation model based on voltage fluctuation;
S2, solving a bearing capacity evaluation model of the distributed power supply to obtain the maximum bearing capacity of the distributed power supply connected to the distribution network.
2. The method for evaluating the bearing capacity of a distributed power supply according to claim 1, wherein,
In the step S1, the load bearing capacity evaluation model based on voltage fluctuation is as follows:
；
In the above-mentioned method, the step of, For the bearing capacity calculation based on voltage fluctuation,/>For voltage fluctuations caused by the distributed power supply,Rated voltage of line,/>For the ratio of the instantaneous amplitude of the distributed power supply output power variation to the rated output power,For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modeResistance per unit length of line,/>Is the length of the main line.
3. The method for evaluating the bearing capacity of a distributed power supply according to claim 1, wherein,
In the step S1, the load-bearing capacity evaluation model of the distributed power supply is as follows:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the bearing capacity calculation based on voltage loss,/>For the bearing capacity calculation based on voltage fluctuation,/>Is calculated as a load bearing capacity based on line current carrying.
4. A method for evaluating the load capacity of a distributed power supply according to claim 3,
The bearing capacity evaluation model of the distributed power supply further comprises a bearing capacity evaluation model based on voltage loss and a bearing capacity evaluation model based on line current carrying;
The load capacity evaluation model based on the voltage loss is as follows:
；
The load capacity evaluation model based on line current carrying is as follows:
；
In the above-mentioned method, the step of, For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted by load lines,/>、/>Resistance, reactance, respectively, of line unit length,/>For the length of the line trunk,/>Rated voltage of line,/>Is the loss percentage of line voltage,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modePower factor angle of distributed power supply,/>A current value is continuously allowed for the line.
5. A system for evaluating the bearing capacity of a distributed power supply is characterized in that,
The system comprises a bearing capacity evaluation model construction module and a model solving module;
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the distributed power supply, and the model comprises a bearing capacity evaluation model based on voltage fluctuation;
The model solving module is used for solving a bearing capacity evaluation model of the distributed power supply to obtain the maximum capacity which can be borne by the distributed power supply when the distributed power supply is connected to the distribution network.
6. The system for evaluating the load capacity of a distributed power supply according to claim 5, wherein,
The bearing capacity evaluation model construction module comprises a bearing capacity evaluation model unit based on voltage fluctuation;
the bearing capacity evaluation model unit based on voltage fluctuation is used for constructing the following bearing capacity evaluation model based on voltage fluctuation:
；
In the above-mentioned method, the step of, For the bearing capacity calculation based on voltage fluctuation,/>For voltage fluctuations caused by the distributed power supply,Rated voltage of line,/>For the ratio of the instantaneous amplitude of the distributed power supply output power variation to the rated output power,For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modeResistance per unit length of line,/>Is the length of the main line.
7. The system for evaluating the load capacity of a distributed power supply according to claim 5, wherein,
The bearing capacity evaluation model construction module is used for constructing a bearing capacity evaluation model of the following distributed power supply:
；
In the above-mentioned method, the step of, Calculating a value for the distributed power supply load capacity,/>For the bearing capacity calculation based on voltage loss,/>For the bearing capacity calculation based on voltage fluctuation,/>Is calculated as a load bearing capacity based on line current carrying.
8. The system for evaluating the load capacity of a distributed power supply according to claim 7, wherein,
The bearing capacity evaluation model building module further comprises a bearing capacity evaluation model unit based on voltage loss and a bearing capacity evaluation model unit based on line current carrying;
the voltage loss-based bearing capacity evaluation model unit is used for constructing the following voltage loss-based bearing capacity evaluation model:
；
The line current carrying-based bearing capacity evaluation model unit is used for constructing the following line current carrying-based bearing capacity evaluation model:
；
In the above-mentioned method, the step of, For the voltage loss coefficient of the circuit corresponding to a typical load distribution mode、/>Active power and reactive power respectively transmitted by load lines,/>、/>Resistance, reactance, respectively, of line unit length,/>For the length of the line trunk,/>Rated voltage of line,/>Is the loss percentage of line voltage,/>For the distributed power supply, corresponding to the voltage loss coefficient under a certain power distribution modePower factor angle of distributed power supply,/>A current value is continuously allowed for the line.
9. A load capacity assessment device for a distributed power supply is characterized in that,
Comprises a processor and a memory;
the memory is used for storing computer program codes and transmitting the computer program codes to the processor;
The processor is configured to perform a method of evaluating the load bearing capacity of a distributed power supply according to any one of claims 1-4 according to instructions in the computer program code.
10. A computer storage medium having a computer program stored thereon, characterized by:
The computer program, when executed by a processor, implements the steps of a method of assessing the load bearing capacity of a distributed power supply as claimed in any one of claims 1 to 4.
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