赵利辉

(黑龙江省大庆市电力集团电力调度中心, 黑龙江 大庆 163453)



基于分布系数法的环网潮流计算在油田电网中的应用

赵利辉

(黑龙江省大庆市电力集团电力调度中心, 黑龙江 大庆 163453)

摘要电网合解环操作是调度运行管理的一个重要环节，在实际运行中，需重点分析与调控。为解决同一系统短时环网存在的合环开关处无电流、合环开关处电流小于10A及环网内其他开关电流无明显变化的问题，研究了基于分布系数法的环网潮流计算，通过对不同变电所投停电容器改变无功潮流分布，将不同方式下节点负荷乘以分布系数后叠加作为电源支路的潮流，然后求出其他支路的潮流，最终确定环网内合环电流变化明显的调控措施，以方晓一次变系统35kV西一二线合环构成的短时环网为例，对各种方式进行了对比计算。结果表明： 在西一变停用电容器后，合环开关处有明显电流，能够进行成功的合解环操作，并对类似接线结构的变电所进行了计算，为调度员指挥操作提供理论依据，确保了油田电网安全可靠运行。

关键词分布系数; 油田电网; 调度; 合环操作

Application of Ring Network Power Flow Calculation in Oil Field Power Grid with Distribution Coefficient Method

ZHAOLihui

(The Daqing City of Heilongjiang Province Electric Power Dispatching Center of Electric Power Group, Daqing 163453, Heilongjiang, China)

AbstractThe closed loop in a power network is important in the operation and management of a dispatching agency, which should be analyzed and controlled in the practical operation. In an electric power system, the switch has no current, or the co-current is less than 10A. To solve the problem, power flow calculation using a distribution coefficient method is studied. The reactive power flow distribution changes with input or stop of different substation capacitors. The node load is used under different operating modes multiplied by the distribution coefficient. The results are superimposed to give the trend of power supply branch. Finally, the trend of other branches is found. Using this method, control measures are taken to ensure that the loop current is changed obviously. As an example, the closed loop current on the 35kV line at Fang Xiao substation is calculated under various operation modes. The results show that, after discontinuation of the west substation capacitor, the loop closing switch has a significant current. It can then solve the loop operation and calculate the similar connection structure of substations, providing a theoretical basis for operations of the dispatcher command. It ensures safe and reliable operation of the oilfield power grid.

Keywordsdistribution coefficient; oil field power grid; scheduling; closed loop operation

油田电网是环网设计，开网运行，在电网设备检修、事故异常处理和最大需量调控等情况下，改变系统运行方式，需要合环转移负荷，电网短时变成了环网运行。在调度指挥操作时，必须要确保合环成功，但是对于同一座110kV变电所的35kV母线分别接带35kV变电所的接线方式，当对合环开关进行操作后，经常遇到合环开关处无电流、合环开关处电流小于10A、环网内其他开关电流无明显变化的情况，给调度员判断是否合环成功带来了困难。……