The Study Of Reactive Power Compensation In Leting Rural Power Distribution Network

Reactive power balance is to ensure that the power system, power quality, reduce losses, the power system economic, safe and reliable operation of the important part. In the power system, electrical equipment mostly emotional, and low power factor, resulting in a large number of grid reactive power, reduce the quality of power supply. Leting County in the medium voltage power grid, because of long transmission lines, distribution transformers and more seasonal and time-varying load of strong reactive power loss is more obvious, so there is a big loss reduction and rural power grid space. Leting County for medium voltage distribution network reactive losses more serious phenomenon, this focus on compensation and dispersion compensation in accordance with the combination of high compensation and the combination of low compensation, voltage regulation and the principle of combining Loss Reduction, made the following aspects work:(1) According to the reactive power algorithm of the rural power network, reactive power of the rural power network is analyzed. This paper also discusses the principle of reactive power compensation, which is installing the capacitor reactive power compensation in 10kV line. (2) According to the analysis of two typical rural 10kV distribution lines in LeTing county, the compensation scheme is presented, which makes the low voltage side with concentrated compensation and adds the medium voltage circuit compensation. As the major seasonal variation in this line, larger auto-switching reactive power compensation devices should be applied. The energy saving effect of this scheme is determined on the basis of the numerical analysis. (3) According to the principle and characteristic of adjustable capacitors in the substation, the operating mode of adjustable capacitors is compared. Based on the practical application of rural reactive power compensation system with adjustable capacitors in 35kV Matouying substation, a new mode of reactive power compensation system with adjustable capacitors is put forward and used. The system of reactive power compensation system in rural 35kV LeTing substation is improved.