Research on Voltage Control of Distribution Network based on Constraint Programming

At present, with the access of new power sources and loads such as small-capacity distributed power supply and electric vehicles, on the one hand, the traditional passive distribution network is gradually transformed into an active distribution network, changing the one-way flow mode of the power flow of the traditional radiant distribution network, which makes the voltage distribution of the distribution network more complicated. On the other hand, the randomness and fuzziness of the distributed power supply and EV charging load make the load prediction of the distribution system more difficult and increase the difficulty of the voltage management of the distribution system. In this paper, the reactive power output of distributed power supply, charge and discharge power of energy storage device and flexible controllable load are controlled to optimize the voltage distribution and operating network loss of distribution network under new energy environment. Firstly, a stochastic chance constrained programming model for reactive voltage coordination optimization of distribution network under new energy environment is established, and the rationality and effectiveness of the model is verified by taking the improved IEEE33 node as an example.