Energy storage optimization configuration method based on transmission congestion containing wind and light access
An optimized configuration and energy storage technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve the problems of power system voltage fluctuations, increase transmission line congestion, and expand load peak-valley difference, etc., to improve the solution Efficiency, reducing operating costs, and absorbing the effects of wind and solar output
Active Publication Date: 2019-05-31
NANJING INST OF TECH
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Problems solved by technology
[0002] The intermittence and randomness of wind power and photovoltaic power generation have brought great challenges to the safe operation of the power system. The anti-peaking characteristics of wind power indirectly expand the peak-valley difference of load and increase the possibility of transmission line congestion. The uncertain output of photovoltaic power generation will cause voltage fluctuations in the power system
The traditional scheduling method is to adjust the power generation of thermal power and hydropower according to the load forecast curve and new energy power generation forecast curve. High cost; although hydropower is relatively flexible, it is greatly affected by the region
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[0018] Such as Figure 1 to Figure 2 As shown, the technical solution of the present invention is described in further detail.
[0019] refer to figure 1 Describe the general process of the inventive method, concrete steps are as follows:
[0020] Such as figure 1 As shown, an energy storage optimization configuration method based on transmission congestion including wind and solar access, the steps are as follows:
[0021] S1. Obtain the four-season typical output of new energy units and the typical load curves of each node, obtain the data of each unit, and initialize each variable;
[0022] S2. Establish a two-stage optimization model for energy storage capacity, specifically: build the first-stage optimization model with the system operating cost as the target, and build the second-stage optimization model with the system comprehensive operation cost including system operation and energy storage investment as the target , establish a two-stage optimization model for en...
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An energy storage optimization configuration method based on transmission congestion containing wind and light access comprises the following steps of acquiring each unit data; establishing an energystorage capacity two-stage optimization model; taking the economic operation of a system as a target to construct the model without energy storage, selecting a power transmission line which is most likely to generate system congestion and determining an installation node set to be selected; coding an energy storage position and a capacity and randomly forming a first generation population; using the population as a known quantity, using a gradient method to calculate each time output of energy storage in a first-stage function and system operating cost G, using the maximum output of the energystorage as the rated power of the energy storage, and calculating system comprehensive operating cost F; calculating population individual fitness; determining whether the function is converged or reaches the maximum number of iterations, if the function is not converged or does not reach the maximum number of iterations, entering into a next step, otherwise, outputting an optimal result; and forming a new population, and entering into a fifth step. Operating cost and energy storage investment cost are comprehensively considered, and the method is good for improving the efficiency and the economy of energy storage and capacity configuration.
Description
technical field [0001] The present invention relates to the technical field of energy storage optimal configuration methods, in particular to the technical field of energy storage optimal configuration methods based on transmission blockage and wind-solar access. Background technique [0002] The intermittence and randomness of wind power and photovoltaic power generation have brought great challenges to the safe operation of the power system. The anti-peaking characteristics of wind power indirectly expand the peak-valley difference of load and increase the possibility of transmission line congestion. The uncertain output of photovoltaic power generation will cause voltage fluctuations in the power system. The traditional scheduling method is to adjust the power generation of thermal power and hydropower according to the load forecast curve and new energy power generation forecast curve. High cost; although hydropower is relatively flexible, it is greatly affected by the r...
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IPC IPC(8): H02J3/46H02J3/32
Inventor 陈光宇陈伟张仰飞郝思鹏刘海涛黄良灿李干
Owner NANJING INST OF TECH
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