CN118014402A - Photovoltaic access power distribution network capacity assessment method and system based on power supply distance measurement - Google Patents
Photovoltaic access power distribution network capacity assessment method and system based on power supply distance measurement Download PDFInfo
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Abstract
The invention provides a photovoltaic access power distribution network capacity assessment method and system based on power supply distance measurement, and belongs to the technical field of photovoltaic access power distribution network capacity assessment; the technical problems to be solved are as follows: the photovoltaic access power distribution network capacity evaluation method and system based on power supply distance measurement are provided; the technical scheme adopted for solving the technical problems is as follows: converting node injection power of the photovoltaic power plant into composite power supply power, setting the node number of the photovoltaic power plant as n, setting the voltage at the node n as U n, setting the injection power as P n+Qn, and setting the corresponding power as 0 if no injection power is detected at the node; aiming at a node n, as the power flowing through a line between the node n-1 and the node n is P n+Qn, the voltage at the node 1 and the voltage at the node n are calculated, the calculation mode of the voltage at the node n is optimized, and after the line model parameter is determined, whether the photovoltaic access scheme exceeds the upper limit of the equivalent power supply distance is evaluated; the method is applied to capacity assessment of the photovoltaic access distribution network.
Description
Technical Field
The invention provides a photovoltaic access power distribution network capacity assessment method and system based on power supply distance measurement, and belongs to the technical field of photovoltaic access power distribution network capacity assessment.
Background
With a large number of distributed photovoltaic access distribution networks, the problem that the voltage of the grid-connected point is increased and out of limit is easy to generate becomes one of main factors restricting the photovoltaic access distribution networks, the existing photovoltaic access distribution network capacity assessment needs to assume the load and the distribution position of the distributed photovoltaic access lines in advance, the photovoltaic access capacity and the access position are not considered as a whole, the calculation is complicated, the calculation load is heavy, and optimization and improvement are urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and solves the technical problems that: the capacity evaluation method and system for the photovoltaic access distribution network based on the power supply distance measurement are improved.
In order to solve the technical problems, the invention adopts the following technical scheme: the photovoltaic access power distribution network capacity evaluation method based on power supply distance measurement comprises the following measurement evaluation steps:
Step one: converting node injection power of a photovoltaic power plant into composite power supply power, setting the node number of the photovoltaic power plant as n, the voltage as U n, the injection power as P n+Qn, and if no injection power is detected at the node, setting the corresponding power as 0;
Step two: for node n, since the power flowing through the line between node n-1 and node n is P n+Qn, the calculation formula for the voltage at node n is expressed as:
；
wherein: u n is the voltage of node n, R n is the wire resistance between node n and the previous node n-1, X n is the wire reactance between node n and the previous node n-1, P n is the injected active power of node n, Q n is the injected reactive power of node n, and U n-1 is the voltage of node n-1;
Step three: defining the power flowing through the lines at node 0 and node 1 of the photovoltaic power plant as The formula for the voltage at node 1 is then:
；
Wherein: u 0 is the voltage at node 0, R 1 is the wire resistance between node 1 and the previous node 0, X 1 is the wire reactance between node 1 and the previous node 0, P i is the injected active power of node i, and Q i is the injected reactive power of node i;
step four: through successive iterations, the calculation formula for the voltage at node n is expressed as:
；
Wherein: u 1 is the voltage at node 1, R 2 is the wire resistance between node 2 and the previous node 1, X 2 is the wire reactance between node 2 and the previous node 1;
step five: since the voltage deviation between node 0 and node n is within a specified range, the calculation formula for the voltage at node n can be simplified as:
；
and further simplifying to obtain:
；
Step six: since the line resistance and reactance are proportional to the line length, the calculation formula for the voltage at node n can be further simplified to:
；
Where r and x are the resistance and reactance of the line per unit length, P n is the injected active power at node n, L n is the wire length between node n and the previous node 1, and P nLn is the product of P n and L n;
、/>、/> Power factor angles at nodes 1,2, n, respectively;
Step seven: in order to increase the generation income, the existing photovoltaic power plant is connected with a maximum power tracking control method, so that the power factor of each node is close to 1, and tan is obtained when the power factors of the nodes are the same =tan/>=tan/>The calculation formula for the voltage at node n can therefore be further simplified as:
；
Step eight: further, considering that the ratio of reactance per unit length to resistance per unit length of the same line is a fixed value, that is, x/r=λ, in actual operation of the same line, the formula can be further simplified to:
；
Merging the same items can be further simplified to obtain:
；
Wherein: p i is the injected active power of node i, L i is the wire length between node n and the previous node 1, and P iLi is the product of P i and L i;
Step nine: will be Defined as the equivalent power distance, expressed as:
；
After the line model and the running voltage of the power distribution network are determined, the equivalent power supply distance can be determined and calculated, and the maximum accessible photovoltaic capacity is estimated according to the access position of the distributed photovoltaic in the distributed photovoltaic access scheme.
The evaluation system adopted for realizing the photovoltaic access distribution network capacity evaluation method based on the power supply distance measurement comprises a preparation module for acquiring distribution network outgoing line related data, wherein the related data comprise distribution network transformer substation outgoing line model numbers, unit length resistances, reactances, line lengths from each node to a transformer substation outlet and grid-connected capacity of each photovoltaic access node;
the calculation module is used for calculating equivalent power supply distances of outgoing lines of different types by taking line parameters of outgoing lines of the power distribution network transformer substation as input data;
The system also comprises a judging module which is used for evaluating and calculating the equivalent power supply distance of the actual distributed photovoltaic access scheme.
Compared with the prior art, the invention has the following beneficial effects: in order to reasonably evaluate the capacity of a distributed Photovoltaic (PV) access power distribution network, prevent a large number of photovoltaic access power distribution networks from causing voltage deviation overrun, specifically analyze the relationship between the capacity of the photovoltaic access power distribution network and the power grid distance, provide the concept of equivalent power supply distance and establish a capacity evaluation model of the photovoltaic access power distribution network; for a 10kV distribution line, the access capacity of different types of wires is given by combining the power supply distance, and according to the calculation result, when a distributed photovoltaic power station is accessed into a distribution network, the distribution network can not generate unacceptable voltage deviation as long as the equivalent power supply distance meets the requirement; compared with the existing evaluation method, the method has the advantages that the distribution condition of the distributed photovoltaic access lines is not required to be assumed in advance, and the calculation of the accessible distributed capacity can be determined after the line model is determined, so that great convenience and practicability are provided for the evaluation work of the scheme of accessing the distributed photovoltaic power station to the power distribution network.
Drawings
The invention is further described below with reference to the accompanying drawings:
Fig. 1 is a schematic diagram of a model structure of a distributed photovoltaic power generation and distribution network circuit of the present invention.
Detailed Description
The invention provides a photovoltaic access distribution network capacity assessment method based on power supply distance measurement; as shown in fig. 1, the normal operation of the power distribution network may be equivalent to a single source radiation structure, the medium-low voltage power distribution network may ignore the ground capacitance, only consider the line impedance, the node injection power of the photovoltaic power plant is equivalent to a composite power supply, in order not to lose the generality, let the number of nodes be n, for node n, the voltage is set to U n, and the injected power is P n+Qn, if no power is injected at the node, the corresponding power is 0.
For node n, since the power flowing through the line between node n-1 and node n is P n+Qn, the voltage at node n can be expressed as:
（1）；
Similarly, since the power of the lines flowing through node 0 and node 1 is The voltage at node 1 can therefore be expressed as:
（2）；
thus, by successive iterations, the voltage at node n can be represented as:
（3）；
According to the current national standard 'power quality supply voltage deviation' GB/T12325, the sum of positive and negative deviation absolute values of 110kV-35kV voltage is not more than 10% of nominal voltage, and the supply voltage deviation of 10kV and below is not more than 7%; the voltage deviation between node 0 and node n is therefore within the specified range, i.e., U 0≈U1≈…≈Un, and therefore equation (3) can be simplified as:
（4）；
further simplifying and obtaining:
（5）；
Considering that the line resistance is proportional to the line length, equation (5) can be simplified as:
（6）；
where r and x are the resistance and reactance per unit length of the line.
In order to increase the generation income, the existing photovoltaic power plant is connected with a maximum power tracking control method, and the generated reactive power is negligible; therefore, the power factor injected by each node is close to 1, and tan is the same when the power factors of the nodes are adopted=tan/>=tan/>Equation (6) can be further reduced to:
（7）；
Further, considering that the ratio of reactance per unit length to resistance per unit length of the same line is a fixed value, that is, x/r=λ, in actual operation of the same line, the formula can be further simplified to:
（8）
（9）
In the invention, P iLi is defined as an equivalent power supply distance, and as can be seen from the formula (9), the node voltage deviation is related to the equivalent power supply distance of the injection line, and the equivalent power supply distance can be obtained by further simplifying the deformation:
（10）；
After the line model and the running voltage of the power distribution network are determined, the equivalent power supply distance can be determined and calculated, and the accessible photovoltaic maximum capacity is estimated according to the access position of the distributed photovoltaic in the distributed photovoltaic access scheme, so that great convenience and practicability are provided for the estimation work of the access of the distributed photovoltaic power station to the power distribution network in engineering practice.
In addition, the embodiment of the invention also provides a photovoltaic access power distribution network capacity evaluation system based on power supply distance measurement, which comprises the following steps:
The preparation module is used for acquiring relevant technical data of the power distribution network, and comprises the power distribution network transformer substation outgoing line model, unit length resistance, reactance, line length from each node to a transformer substation outlet, grid-connected photovoltaic capacity data of each node and the like.
And the calculation module is used for calculating the equivalent power supply distance upper limit of different types of lines by taking the line parameters of the outlet line of the power distribution network transformer substation as input data.
And the judging module is used for evaluating and calculating the equivalent power supply distance of the actual distributed photovoltaic access scheme. If the distance is higher than the upper limit of the equivalent power supply distance, the capacity of the distributed photovoltaic access needs to be reduced, and the scheme is not feasible; if the voltage deviation is not higher than the upper limit of the equivalent power supply distance, the scheme does not generate voltage deviation out-of-limit, and the scheme is feasible.
In an embodiment, a computer device is further provided, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the steps of the photovoltaic access distribution network capacity assessment method based on the power supply distance measurement when the processor executes the computer program.
In an embodiment, a computer readable storage medium is provided, which includes a computer program, where the computer program when executed by a processor implements the steps of the photovoltaic access distribution network capacity assessment method based on power supply distance measurement.
Based on the setting of the evaluation method and the system, the invention does not need to assume the distribution condition of the distributed photovoltaic in advance, no matter where the distributed photovoltaic is connected on the line, the minimum value of the connection capacity is that the distributed photovoltaic is positioned at the end position of the line; meanwhile, no matter where the distributed photovoltaic is connected to the line, the upper limit of the equivalent power supply distance is a fixed value, and the fixed value is related to parameters such as line parameters, substation bus voltage, line terminal allowed voltage and the like, so that great convenience is brought to the evaluation of the photovoltaic connection capacity in the distributed photovoltaic connection scheme.
Example 1:
The invention selects a 10 kilovolt outlet wire model of a power distribution network transformer substation as LJ240, the unit resistance of the model line is 0.137 ohm/km, the unit reactance is 0.321 ohm/km, the busbar voltage of the transformer substation is selected as 10 kilovolts, the 10 kilovolt supply voltage deviation is not more than 7 percent according to the requirement of the current national standard GB/T12325 of the power quality supply voltage deviation, so the allowable value of the line end voltage is 10.7kV, the power factor of the photovoltaic access power generation system is adjustable within the range of 0.95 to 0.95 of lag according to the requirement of the current national standard photovoltaic power generation system access power distribution network technical regulation GB/T129319-2012, the maximum power control is adopted in practical operation, and the power factor is cos =0.99, Tan/>=0.1425；
The line equivalent power distance is:
M=(10.7-10)×10/0.137×1000/(1+0.321/0.137×0.1425)=38305。
considering that the rural area power supply distance is not suitable to exceed 15 km, the line end access photovoltaic capacity is not suitable to exceed = 38305/15 = 2554kW.
Considering that the power supply distance in the county area is not suitable to exceed 5 km, the photovoltaic capacity of the line end access is not suitable to exceed = 38305/5 = 7661kW.
In the embodiment of the invention, the equivalent power supply distance is calculated for different types of 10 kilovolt lines frequently adopted in engineering practice, and the maximum allowable access capacity of the photovoltaic is given under the extreme condition of all the distributed photovoltaic access line ends, and is specifically shown in the following table 1.
Table 1 equivalent power supply distance meter for different types of 10 kv line access
The corresponding equivalent power supply distances for different voltages of the power distribution network substation bus are given in table 1. When the equivalent power supply distance in the photovoltaic access scheme is lower than the upper limit of the equivalent power supply distance, the voltage of the distributed photovoltaic grid-connected point does not exceed the national standard.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (2)
1. The capacity evaluation method for the photovoltaic access distribution network based on the power supply distance measurement is characterized by comprising the following steps of: the method comprises the following measurement and evaluation steps:
Step one: converting node injection power of a photovoltaic power plant into composite power supply power, setting the node number of the photovoltaic power plant as n, the voltage as U n, the injection power as P n+Qn, and if no injection power is detected at the node, setting the corresponding power as 0;
Step two: for node n, since the power flowing through the line between node n-1 and node n is P n+Qn, the calculation formula for the voltage at node n is expressed as:
；
wherein: u n is the voltage of node n, R n is the wire resistance between node n and the previous node n-1, X n is the wire reactance between node n and the previous node n-1, P n is the injected active power of node n, Q n is the injected reactive power of node n, and U n-1 is the voltage of node n-1;
Step three: defining the power flowing through the lines at node 0 and node 1 of the photovoltaic power plant as The formula for the voltage at node 1 is then:
；
Wherein: u 0 is the voltage at node 0, R 1 is the wire resistance between node 1 and the previous node 0, X 1 is the wire reactance between node 1 and the previous node 0, P i is the injected active power of node i, and Q i is the injected reactive power of node i;
step four: through successive iterations, the calculation formula for the voltage at node n is expressed as:
；
Wherein: u 1 is the voltage at node 1, R 2 is the wire resistance between node 2 and the previous node 1, X 2 is the wire reactance between node 2 and the previous node 1;
step five: since the voltage deviation between node 0 and node n is within a specified range, the calculation formula for the voltage at node n can be simplified as:
；
and further simplifying to obtain:
；
Step six: since the line resistance and reactance are proportional to the line length, the calculation formula for the voltage at node n can be further simplified to:
；
Where r and x are the resistance and reactance of the line per unit length, P n is the injected active power at node n, L n is the wire length between node n and the previous node 1, and P nLn is the product of P n and L n;
、/>、/> Power factor angles at nodes 1,2, n, respectively;
Step seven: in order to increase the generation income, the existing photovoltaic power plant is connected with a maximum power tracking control method, so that the power factor of each node is close to 1, and tan is obtained when the power factors of the nodes are the same =tan/>=tan/>The calculation formula for the voltage at node n can therefore be further simplified as:
；
Step eight: further, considering that the ratio of reactance per unit length to resistance per unit length of the same line is a fixed value, that is, x/r=λ, in actual operation of the same line, the formula can be further simplified to:
；
Merging the same items can be further simplified to obtain:
；
Wherein: p i is the injected active power of node i, L i is the wire length between node n and the previous node 1, and P iLi is the product of P i and L i;
Step nine: will be Defined as the equivalent power distance, expressed as:
；
After the line model and the running voltage of the power distribution network are determined, the equivalent power supply distance can be determined and calculated, and the maximum accessible photovoltaic capacity is estimated according to the access position of the distributed photovoltaic in the distributed photovoltaic access scheme.
2. The evaluation system adopted for realizing the photovoltaic access distribution network capacity evaluation method based on the power supply distance measurement in the claim 1 is characterized in that: the power distribution network outlet line management system comprises a preparation module for acquiring power distribution network outlet line related data, wherein the related data comprise power distribution network transformer substation outlet line types, unit length resistances, reactances, line lengths from each node to a transformer substation outlet and grid-connected capacity of each photovoltaic access node;
the calculation module is used for calculating equivalent power supply distances of outgoing lines of different types by taking line parameters of outgoing lines of the power distribution network transformer substation as input data;
The system also comprises a judging module which is used for evaluating and calculating the equivalent power supply distance of the actual distributed photovoltaic access scheme.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505608A (en) * | 2015-09-06 | 2017-03-15 | 武汉大学 | Meter and the distributed power source calculation of penetration level method of capacity of short circuit constraint |
| CN108830479A (en) * | 2018-06-12 | 2018-11-16 | 清华大学 | It is a kind of meter and the full cost chain of power grid master match collaborative planning method |
| CN110739720A (en) * | 2019-09-16 | 2020-01-31 | 国网河南省电力公司郑州供电公司 | Method for analyzing influence of distributed photovoltaic T-connection access on line loss of low-voltage distribution network |
| CN115689244A (en) * | 2022-11-15 | 2023-02-03 | 国网江苏省电力有限公司经济技术研究院 | Multi-type load day-ahead scheduling method and device |
| CN116565968A (en) * | 2023-04-17 | 2023-08-08 | 广东电网有限责任公司 | Photovoltaic access capacity allocation method and system based on capacity distance factor |
| CN117196668A (en) * | 2023-08-11 | 2023-12-08 | 中国能源建设集团陕西省电力设计院有限公司 | Large-scale new energy base access planning method and system based on marginal benefit |
| CN117277392A (en) * | 2023-11-22 | 2023-12-22 | 国网山西省电力公司经济技术研究院 | Emergency resource optimal configuration method for elastic lifting of power distribution system |
| CN117458584A (en) * | 2023-10-20 | 2024-01-26 | 国网安徽省电力有限公司 | Typical scene generation method based on combined benefit photovoltaic admission capacity evaluation |
| CN117713191A (en) * | 2023-11-17 | 2024-03-15 | 国网辽宁省电力有限公司大连供电公司 | Distributed photovoltaic access method suitable for medium-low voltage distribution network |
-
2024
- 2024-04-08 CN CN202410410595.1A patent/CN118014402A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505608A (en) * | 2015-09-06 | 2017-03-15 | 武汉大学 | Meter and the distributed power source calculation of penetration level method of capacity of short circuit constraint |
| CN108830479A (en) * | 2018-06-12 | 2018-11-16 | 清华大学 | It is a kind of meter and the full cost chain of power grid master match collaborative planning method |
| CN110739720A (en) * | 2019-09-16 | 2020-01-31 | 国网河南省电力公司郑州供电公司 | Method for analyzing influence of distributed photovoltaic T-connection access on line loss of low-voltage distribution network |
| CN115689244A (en) * | 2022-11-15 | 2023-02-03 | 国网江苏省电力有限公司经济技术研究院 | Multi-type load day-ahead scheduling method and device |
| CN116565968A (en) * | 2023-04-17 | 2023-08-08 | 广东电网有限责任公司 | Photovoltaic access capacity allocation method and system based on capacity distance factor |
| CN117196668A (en) * | 2023-08-11 | 2023-12-08 | 中国能源建设集团陕西省电力设计院有限公司 | Large-scale new energy base access planning method and system based on marginal benefit |
| CN117458584A (en) * | 2023-10-20 | 2024-01-26 | 国网安徽省电力有限公司 | Typical scene generation method based on combined benefit photovoltaic admission capacity evaluation |
| CN117713191A (en) * | 2023-11-17 | 2024-03-15 | 国网辽宁省电力有限公司大连供电公司 | Distributed photovoltaic access method suitable for medium-low voltage distribution network |
| CN117277392A (en) * | 2023-11-22 | 2023-12-22 | 国网山西省电力公司经济技术研究院 | Emergency resource optimal configuration method for elastic lifting of power distribution system |
Non-Patent Citations (2)
| Title |
|---|
| MORA-FLÓREZ, JJ 等: "Fault location considering load uncertainty and distributed generation in power distribution systems", IET GENERATION TRANSMISSION & DISTRIBUTION, vol. 9, no. 3, 2 April 2015 (2015-04-02), pages 287 - 295, XP006051506, DOI: 10.1049/iet-gtd.2014.0325 * |
| 李国武 等: "考虑集群划分的分布式储能容量规划方法", 电力系统及其自动化学报, vol. 30, no. 12, 31 December 2018 (2018-12-31), pages 1 - 10 * |
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