Site selection and capacity determination configuration method of distributed energy storage system
A technology of distributed energy storage, site selection and fixed capacity, which is applied in the field of power grid, can solve the problems of distributed energy storage system addressing and capacity configuration, and achieve the effect of improving the utilization rate of distributed energy
Pending Publication Date: 2019-09-06
宁波永耀电力投资集团有限公司 +1
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[0004] The present invention proposes a site selection and capacity configuration method for a distributed energy storage system to solve the addressing and capacity configuration problems of a distributed energy storage system
Method used
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Embodiment 1
[0075] figure 2 Among them, it means that a medium-voltage line is drawn from the busbar of a substation. The numbers 1-17 are the node numbers of the line, and the capacity of the distribution transformer attached to each node is under each node. After simplification, it is mounted on the trunk line. The simplified typical line topology diagram is as follows: figure 2 As shown, the typical line parameters are shown in Table 1.
[0076] For example, select a line with 17 nodes, the line model is LGJ-240, the length of the main line does not exceed 10km, the total capacity of each node does not exceed 10000kVA, the power factor is 0.95, the bus side voltage is 10.7kV, and the load rate is 50%. The line parameters and the distribution transformer capacity connected to the node, the simplified line topology diagram is as follows figure 1 Shown, as shown in Table 1:
[0077] Table 1 A line parameter
[0078]
[0079]
[0080] 2. Power flow calculation after the distrib...
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The invention relates to the field of a power grid and especially relates to a site selection and capacity determination configuration method of a distributed energy storage system. The method comprises the following steps: S1) establishing a line absorption capacity model, and through the line absorption capacity model, obtaining maximum installed capacity of a distributed power generation unit which can be accessed by a single line; S2) after access of the distributed power generation unit, calculating active and reactive power flow of each node of the line and voltage offset of each node ofthe line; S3) judging whether to access the distributed energy storage system according to the active and reactive power flow of each node of the line and the voltage offset of each node of the line;and S4) if needing to access the distributed energy storage system, calculating access capacity of the energy storage system through an energy storage capacity calculation model, and accessing at theline node having the maximum voltage offset. By accessing the energy storage system having the maximum capacity, distributed energy utilization rate is improved.
Description
technical field [0001] The invention relates to the field of power grids, in particular to a location selection and capacity determination configuration method for a distributed energy storage system. Background technique [0002] In recent years, with the increasing energy crisis and environmental pollution, the grid-connected scale of renewable energy power generation has become larger and larger, and distributed renewable energy power generation accounts for a large proportion of the scale. However, while the renewable energy represented by solar energy and wind energy alleviates environmental pollution and energy crisis, due to its randomness, interval, and volatility, direct grid-connected operation will affect the safety and stability of the grid, dispatching operation and The control brings problems and impacts, and even the phenomenon of abandoning wind and solar in some areas has greatly reduced the efficiency of energy utilization. [0003] Distributed Energy Stor...
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IPC IPC(8): H02J3/28H02J3/32H02J3/38
CPCH02J3/382H02J3/28H02J3/32H02J2203/20
Inventor 邬宏伟舒恺马玲周奇波谢素敏余彪
Owner 宁波永耀电力投资集团有限公司