Acceptance capacity determination method and device of distributed power supply-containing power distribution network
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A technology of distributed power supply and determination method, which is applied in the direction of circuit devices, electrical components, AC network circuits, etc., and can solve problems such as inaccurate acceptance capacity of distribution network
Active Publication Date: 2018-09-28
CHINA ELECTRIC POWER RES INST +1
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[0003] In order to overcome the inaccurate reception capacity of the distribution network containing distributed power sources caused by the inaccurate operating data of the distribution network, loads and distributed power sources in the above-mentioned prior art, the present invention provides a distribution system containing distributed power sources. The method and device for determining the receiving capacity of the power grid first obtains the respective operating data of the distribution network, distributed power sources and loads, and the topology of the distribution network, then preprocesses the topology of the distribution network, and screens the operating data , consistency verification and fusion, and finally determine the capacity of the distribution network according to the preprocessed topology and the fused operation data, and filter, consistency check and fusion the obtained operation data, and obtain the fused The operation data is accurate, and the accuracy of the acceptance capacity of the distribution network with distributed power is improved
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Embodiment 1
[0111] Embodiment 1 of the present invention provides a method for determining the receiving capacity of a distribution network with distributed power sources, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:
[0112] S101: Obtain the respective operating data of the distribution network, distributed power sources and loads, as well as the topology of the distribution network;
[0113] S102: Perform preprocessing on the topology of the distribution network, and perform screening, consistency check and fusion on the operation data;
[0114] S103: Determine the admission capacity of the distribution network according to the preprocessed topology structure and the fused operation data.
[0115] In the above S101, the respective operating data of the distribution network, distributed power sources and loads and the topology structure of the distribution network are obtained, and the specific process is as follows:
[0116] 1) Obtain th...
Embodiment 2
[0207] The distribution network topology used in Embodiment 2 of the present invention is as follows figure 2 As shown, the distribution network includes 25 nodes, numbered 0, 1, 2..., 24, and the connection relationship between each node and the load is obtained, as shown in Table 1:
[0208] Table 1
[0209]
[0210]
[0211] The parameter information of each line in the distribution network is obtained from the distribution automation system, as shown in Table 2:
[0212] Table 2
[0213]
[0214]
[0215] Obtain load operation data from the metering system and marketing system respectively, and perform load data fusion from multiple data sources to obtain the fused load operation data such as image 3 As shown, the solid line part is the load operation data under the heavy load operation mode, and the dotted line part is the load operation data under the small load operation mode.
[0216] Obtain the operation data of distributed photovoltaic power generati...
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Abstract
The invention provides an acceptance capacity determination method and device of a distributed power supply-containing power distribution network. The method comprises the steps of firstly, acquiringrespective running data of a power distribution network, a distributed power supply and a load and a topological structure of the power distribution network; secondly, pre-processing the topological structure of the power distribution network, and performing sieving, consistency check and fusion on the running data; and finally, determining acceptance capacity of the power distribution network, and performing sieving, consistency check and fusion on the running data to obtain accurate fused running data, wherein the accuracy of the acceptance capacity of the distributed power supply-containingpower distribution network is improved. The running data is acquired from different systems, the acquired running data is fused, the problem that the data of a plurality of systems cannot be shared during grid-connected capacity calculation of the distributed power supply in the prior art is solved, moreover, the calculation data of the grid-connected capacity of the distributed power supply is improved, the actual condition of the power distribution network can be truly reflected, and the accuracy of the acceptance capacity of the distributed power supply-containing power distribution network can be effectively improved.
Description
technical field [0001] The invention relates to the field of grid-connected analysis of new energy power generation technology, in particular to a method and device for determining the receiving capacity of a distribution network containing distributed power sources. Background technique [0002] In recent years, distributed power sources have received more and more attention and applications, but distributed power sources are different from traditional energy sources. While their large-scale grid connection brings huge economic and social benefits, it will also affect the safe operation of distribution networks. bring challenges. A large number of distributed power sources are connected to the terminals or feeder ends of the distribution network at all levels, and the power flow is reversed to increase the bus voltage of the connected substation, especially for distributed photovoltaic power generation. Problems such as voltage fluctuation and power factor exceeding the st...
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