State division method and system of wind power response capability adapting to grid frequency regulation demand
A technology of responsiveness and state division, applied in the direction of AC network voltage adjustment, wind power generation, electrical components, etc., can solve the problems of not considering the actual demand of the power grid, the decline of power system frequency stability, and the uncertainty of the state division boundary, etc., to achieve The effect of solving uncertainty problems and improving accuracy and stability
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Embodiment 1
[0059] As described in the background art, the quadrant division of grid frequency regulation demand and wind power response capability is of great significance for guiding wind turbines to participate in grid frequency response. Therefore, the present embodiment provides a method and system for evaluating the response capability of wind power and dividing the state to adapt to the frequency regulation requirements of the power grid. The method and system for the risk assessment of insufficient power supply in the power grid are based on the establishment of multiple types of risk sources at the transmission grid level, and when the risk source model is established Focusing on the influence of photovoltaics on the distribution network load prediction error probability distribution, the conventional load prediction error probability model and the active distribution network type load prediction error probability model are established respectively. The operating conditions of the...
Embodiment 1
[0168] This embodiment takes the IEEE RTS-79 reliability test system as an example to further illustrate the specific implementation process of the present invention, image 3 A schematic diagram of the system topology. The wind farm (installed capacity of 712.2MW) is connected to the 16th node of the transmission grid to replace the original 155MW generator set, and the 13th node is set as an active distribution network type load. Among them, the active distribution network type load is set to 20 IEEE18 node distribution networks, the maximum total load of a single distribution network is 11.6MW+j7.59Mvar, and photovoltaic power generation (installed capacity of 48.6MW) is connected to 3 IEEE18 node distribution networks. at the node.
[0169] The predicted sample and actual sample data of wind farm output are taken from the offshore wind farm in Belgium in 2016 by Elia Power Grid, and the forecast and actual samples of photovoltaic output are taken from the photovoltaic pow...
Embodiment 2
[0181] Based on the risk assessment result of insufficient power supply of the power grid in the first engineering embodiment and the operating conditions of the wind turbines at the corresponding moment, normalization processing is carried out respectively. In this project example, the risk reference base value is taken as the accident rotating reserve capacity of the IEEE-RTS79 power grid, which is about 300MW when 10% of the maximum installed capacity of the power grid is taken, and the reference base value of the wind turbine operating condition is taken as 11.2m / s.
[0182] Based on the Fuzzy toolbox, the two-dimensional variable normalization index is input into the fuzzy inference system, and its quadrant division is determined by inference. The input membership function parameters of the two-dimensional variables are shown in Table 7, the output membership function parameters of the four-quadrant membership in the four sub-intervals are shown in Table 8, and the fuzzy o...
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