高比例电缆进线110 kV变电站无功优化计算研究

Study on Reactive Power Compensation Optimization Computation of 110 kV Substation with High Proportional Cable Entry

针对城市高比例电缆进线110 kV变电站运行期间存在功率因数越限问题,提出一种110 kV变电站无功补偿优化计算方法。首先,建立高峰/低谷功率因数诊断模型诊断筛查高峰/低谷负荷期间不合格的运行数据;然后,构建容性/感性无功优化模型,根据不合格运行数据计算容性/感性无功容量值;最后,建立容性/感性功率因数检验模型,对容性/感性无功容量值进行检验计算,得到无功补偿优化方案。通过实例验证该方法计算速度快、计算精度高、简单易用,可有效解决现有110 kV变电站无功配置不合理的技术问题。

As for the issue that the power factor out of limit during the operation of 110 kV substation with high proportion cable incoming line in the city,an optimal calculation method of reactive power compensation for 110 kV substation is proposed.Firstly,a peak/trough power factor diagnosis model is established to diagnose and screen unqualified operation data during peak/trough load.Then a capacitive/inductive reactive power optimization model is constructed,and the capacitive/inductive reactive power capacity value is calculated according to the unqualified operation data.Finally,a capacitive/inductive power factor test model is established to test and calculate the capacitive/inductive reactive power capacity value,and the reactive power compensation optimization scheme is obtained.The example shows that this method has the advantages of fast calculation speed,high calculation accuracy and simple usage,which can effectively solve the technical problems of unreasonable configuration in existing 110 kV substations.