Power grid loss reduction grading and partitioning-based voltage control method

Abstract

The invention discloses a power grid loss reduction grading and partitioning-based voltage control method, which comprises the following steps of: firstly, establishing an influence index system of voltage on network loss, considering the network loss contribution rate of each node, carrying out grading and partitioning optimization on a network frame by utilizing a K-means clustering algorithm, and carrying out voltage regulation control by taking the appropriate deviation between the current voltage of the central pivot in the partition and a target value, the minimum voltage regulation quantity of each node and the minimum network loss of each grading partition as targets. According to the invention, based on selection of voltage control, an adjusting mode with small voltage fluctuation is considered while the loss reduction effect of each partition is also considered, so that unification of safe operation and economic operation of a power grid is fully achieved; and the method also has the characteristics of high operability, high calculation efficiency and convenience in implementation, and can play a good role in reducing the network loss, improving the economical efficiency of the operation of the power distribution network and improving the electric energy quality of the power distribution network.

Description

technical field [0001] The invention belongs to the field of voltage control, and in particular relates to a voltage control method based on the dynamic loss reduction partition of the power grid. Background technique [0002] Voltage is an important indicator of power quality. Voltage quality has an important impact on the safe and economical operation of the power system, on ensuring the safe production of users, product quality, and the safety and life of electrical equipment. The reactive power compensation and reactive power balance of the power system are the basic conditions to ensure the voltage quality. Effective control and reasonable reactive power compensation can not only ensure the voltage quality, but also improve the stability and safety of the power system operation and reduce power loss. , give full play to the economic benefits of electric energy. [0003] (1) The reactive power flow fluctuates greatly, and the voltage regulation loss is obvious [0004]...

AI Technical Summary

Problems solved by technology

Although the above method improves the overall voltage level of the power distribution system, the influence of voltage on network loss is ignored in the optimization process. After optimization, the system voltage level is too high to increase the network loss, and the voltage is too low to meet user requirements.

Due to the different characteristics of electricity consumption in different regions, there are problems such as insufficient legal support, unreasonable electricity price structure, and lack of incentive policies.

Moreover, power demand side management technology is generally based on the premise of ensuring power quality, and it is impossible to take into account the power grid loss in real time during the implementation process.

[0005] (2) The action frequency of reactive power adjustment equipment is too high

[0006] The logic design of passive power regulation and the AVC device with insufficient redundancy will lead to a large number of switching actions of the on-load tap changer tap and the capacitive reactor when the voltage fluctuates, which will affect the service life of the switch and the tap and increase the frequency of regulation. The probability of electrical equipment failure affects the reliability of power grid operation

[0007] (3) Reactive voltage adjustment is not accurate enough

[0008] The capacity allocation between the on-load tap-changing transformer tap and the capacitive reactor is inappropriate. The power regulation method of the on-load tap-changing transformer tap is relatively nonlinear, and the setting of the gear is too large or the cost may cause excessive power regulation or power regulation. Insufficient electricity, similarly, the capacity and grouping of capacitive reactors are prone to high operating voltage caused by putting in capacitive reactors, and the operation voltage is too low after removing capacitive reactors

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