基于差分进化算法对光伏电站有功/无功协调优化并网点电压的策略研究

Based on differential evolution algorithm for a strategy study on the active coordination reactive power optimization of photovoltaic power plants and the grid voltage

考虑到光伏电站出力具有随机性、波动性的特点,当其大规模并网后,将对电网的安全运行带来较大影响。因此,探讨了光伏电站有功对并网点电压和损耗的影响,利用光伏逆变器和SVG调节无功的能力,提出了一种基于光伏电站有功协调无功优化并网点电压的方法。建立以光伏电站内部电压偏差和有功损耗的多目标优化模型,利用模糊理论将多目标模型转化为单目标模型,并充分运用自适应差分进化算法对转化后的单目标模型进行优化求解。最后,通过算例仿真结果验证所提方法及模型的合理性。

Considering that the output of photovoltaic power plants has the characteristics of randomness and volatility,when it is connected to the grid on a large scale,it will have a greater impact on the safe operation of the power grid.Therefore,The influence of photovoltaic power station active on the voltage and loss of the grid connection point is discussed,and uses the ability of photovoltaic inverter and SVG to adjust reactive power,and proposes a method for optimizing the grid voltage based on the active power coordination of photovoltaic power station.A multi-objective optimization model based on the internal voltage deviation and active loss of photovoltaic power plant is established,the multi-objective model is converted into a single-objective model by fuzzy theory,and the adaptive differential evolution algorithm is fully used to optimize and solve the transformed single-objective model.Finally,the simulation results of the study are used to verify the rationality of the proposed method and model.