Reactive compensation optimization method based on operation data of transformer substation

Abstract

The invention discloses a reactive compensation optimization method based on operation data of a transformer substation, and the method comprises the steps: obtaining the voltage, active power and reactive power data of a 10kV bus side according to the data obtained by an equipment manufacturer or a field test; selecting typical data of bus voltage, active power and reactive power according to quarters; taking the minimum residual reactive power as an objective function, taking the non-reverse transmission of reactive power and the switching times and switching intervals of a reactive power compensator as constraint conditions, carrying out optimization solution by adopting an improved particle swarm algorithm, determining an optimal scheme of grouping and capacity of the reactive power compensation device, establishing a weighted comprehensive evaluation coefficient of three factors of comprehensive loss, investment and position, comparing the comprehensive optimization evaluation coefficients under the optimization schemes, and selecting the scheme with the minimum comprehensive optimization evaluation coefficient as the optimal scheme to realize reactive compensation optimization. According to the method, the power factor and the voltage level can be improved, safe and stable operation of power supply and consumption equipment is ensured, and the operation economy and reliability of a power grid are improved.

Description

technical field [0001] The invention relates to the technical field of power system power quality control, in particular to a reactive power compensation optimization method based on substation operation data. Background technique [0002] Insufficient reactive power of the power system will reduce the power factor of the system, which will increase the loss of power supply lines and reduce the utilization rate of power generation and power supply equipment. When the power factor is lower than the national standard, the power company will fine it or even cut off the power. The means of power compensation device can achieve the purpose of improving power factor. The current power network usually adopts the method of centralized compensation in substations, and reactive power compensation is performed on the 10kV bus side. The compensation equipment includes static var compensators (SVC), shunt capacitors, synchronous condensers, and static synchronous compensators (STATCOM). ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology will encounter various problems in the process of formulating reactive power compensation schemes for substations. The first is the selection of historical data. Considering that power users generally have seasonality, the nature of load and power consumption of power users in different seasons generally vary. Different, so under strict conditions, it is necessary to use the historical data of reactive power operation throughout the year as the basis of reactive power optimization data, but the huge historical data will undoubtedly increase the difficulty of reactive power compensation optimization and complicate the formulation of reactive power compensation schemes; The selection of compensation capacity and grouping, the larger the reactive power compensation capacity, the greater the investment; the more groups, the more switching switches, reducing the economy, safety and reliability of the reactive power compensation scheme; When the reactive power compensation amount is greater than the reactive power demand, the excess reactive power will be sent back to the grid, but when calculating the power factor, it will be "reversely sent to the right record", which will cause the power factor to drop and bring a series of hazards; in addition, it is necessary to Considering the limit of daily switching times of reactive power compensators, the overvoltage and inrush current generated during the switching process on the one hand threaten the safe and stable operation of the power grid, on the other hand accelerate the insulation aging and capacity attenuation of capacitors, and shorten the service life of capacitors

Images