Research On The Strategies Of Regional Power Network Voltage Control

With the deepening of lean management in power business and the improvement of users' requirements for power-supply reliability, power grid operation has transformed from extensive management to intensification. The original electric available has turned to increase benefits and enhance power quality.Reactive voltage in power system is one of the most important research indicators for power grid, which is related to the stability of the power grid,power quality and operation economy. Therefore, study on reactive voltage is of one of the most important tasks that power grid administrative units are confronted with.It is useful to establish a model,which adopts system active power loss minimization as a goal and solves with primal-dual interior-point method. Besides, computer solution is in accordance with the given error and step length.However, this only obtains a grid section of active power optimization flow. It is necessary to carry out the further research on the rules of active voltage optimization for the electric power system---a dynamic balancing system.Therefore,in Jiyuan, it is necessary to discretize the power grid flow, select the interface of power grid flow at integral point and optimize the reactive voltage to get the curve of the reactive voltage throughout the day. Take Jinghua's transformer as an example, the calculation of high-voltage side reactive power of the transformer and medium-voltage busbar voltage optimization curve in the transformer substation, which are helpful to reduce calculated quantities. On this basis, by the setting calculation of the reactive high-voltage and busbar medium-voltage, the higher limit value and the lower value limit value can be solved respectively, so as to minimize operation times of reactive-load compensation equipment and tapping witch of the transformer.