Reactive power optimization method and device for economical efficiency of power distribution network

Abstract

The invention relates to the technical field of power distribution networks of power systems, and in particular, relates to a reactive power optimization method and device for economical efficiency of a power distribution network, wherein the method comprises the following steps: building a reactive power optimization algorithm model of the power distribution network according to an on-load voltage regulating transformer, a capacitor bank and a distributed power supply, and importing the reactive power optimization algorithm model of the power distribution network into a reactive power optimization device. The reactive power optimization method and device for the economical efficiency of the power distribution network have the advantages that reasonable configuration of a power system and optimal compensation of reactive load can be obtained, the operation stability of the power system can be improved, the network loss can be reduced, and the power system can operate safely and economically; The problem that the safety of a power system is seriously influenced and the operation economy of a power distribution network system is reduced because the stability and the electric energy quality of the current power grid are relatively poor is solved, the economic benefit and the electric energy quality of a power grid can be improved, and the operation economy of the power distribution network system is improved.

Description

technical field [0001] The invention relates to the technical field of power system distribution network, in particular to an economical reactive power optimization method and device for distribution network. Background technique [0002] The distribution network refers to the power network that receives electric energy from the transmission network or regional power plants, and distributes it locally through power distribution facilities or distributes it to various users step by step according to voltage. At present, with the increasing power consumption, the stability and economic operation of the power grid have been paid more and more attention. The poor power quality of the power grid not only affects the power enterprise itself, but also affects the safety of the power system. The reactive power optimization and reactive power compensation of the power system are important components of the safe operation of the power system. The rational configuration of the power sy...

AI Technical Summary

Problems solved by technology

With the gradual increase in the penetration rate of distributed energy in the distribution network, it has brought great difficulties to the reactive power optimization of the distribution network after it is connected to the grid.

[0004] To solve the reactive power optimization problem in traditional technology, the network loss of the distribution network system is usually used as the optimization target, and the action sequence of the reactive power voltage regulation equipment is used as the control variable. The constraint conditions mainly consider the node voltage constraints of the distribution network system, and the regulation equipment Constraints on gear positions, distribution network system reactive power optimization equation constraints, and equipment action times constraints, due to the strong spuriousness of line parameters in low-sensitivity distribution network, the network structure is not easy to fully grasp, and there is no accurate reactive power optimization model. Unable to support advanced applications of reactive power optimization, resulting in reduced economical operation of the distribution network system

Images