The Research And Design Of Distribution Transformer’s Reactive Power Compensation Device

With our country’s economy developing rapidly,the reactive power in power grid increase rapidly.It leads to a series of problems such as deteriorating the power quality,the distribution transformers are generally in a state of three-phase voltage unbalanced operation and so on.At present,the power supply company has widely installed the devices of compensating every phase or all three phases of the transformer.Such practices can‘t monitor each phase’s real demand of reactive power compensation.For these problems,based on the basis of the technology of reactive power compensation,this paper introduced the split-phase dynamic reactive power compensation technology of distribution transformer,developed the split-phase reactive power compensation device,and optimized the compensation method,improved the power factor finally.The main research is shown as follows: Based on the reactive power compensation algorithm which is widely used,proposed a method for dynamic phase separation reactive power compensation of the distribution transformer.The distribution transformer model is set up using the MTALB/SIMULINK,and the algorithm is proved feasible using this distribution transformer model.Then,based on the dynamic phase separation reactive power compensation method,constructed the reactive power compensation device with the intelligent electric parameter acquisition module,display module and control module,and controlled the reactive power compensation device by programming.Finally,this thesis verify the accuracy of the data that this reactive power compensation device analyzed and acquisitted.Meanwhile,simulate and analyze the reliability of reactive power compensation device with simulation software,verify the stability of the reactive power compensation device under the ideal conditions.And the field experiment verified the device can calculate capacitance compensation on the condition of real-time loads,automatically control the capacitor switching,increasing the power factor,thus reducing the loss of distribution transformer and the harm of the reactive current.