计及电能质量约束的微电网接入规划

Integration Planning of Microgrid Considering Power Quality Constraints

近年来,电压波动、谐波等电能质量问题严重制约着配电网中微电网的大规模接入。该文创新性地提出了一种在规划前期考虑电能质量约束的微电网接入规划方法。首先推导了微电网功率概率波动模型,并给出了微电网电能质量静态评估方法。在考虑系统网损等其他经济因素的前提下,将电能质量指标转化为相关约束条件,并给出了微电网并网机会约束规划模型。由于所提出的模型是一个非线性混合整数规划问题,因此引入线性递减粒子群算法(linear decreasing inertia weight-particle swarm optimization,LDIW-PSO)进行求解。为了验证所提出的方法,在IEEE 33节点环境下针对某实际工业园微电网接入案例进行了仿真,仿真结果验证了所提出的方法能够有效提高微电网在配电网里的渗透率。

In nowadays, the power quality problems, such as voltage fluctuations and harmonic, limit the high integration of microgrid in the distribution network. This paper innovatively proposes a method for microgrid integration considering the power quality constrains preliminarily at the planning stage. Firstly, we derive the probabilistic power fluctuation model of microgrid, and present the static-state evaluation of power quality of microgrid. Based on the consideration of network loss and other economic benefits, we transform the power quality index into the related constraint conditions, and present the chance-constrained model for microgrid integration. As the proposed model is a mixed integer one consisting of both linear and non-linear element, we adopt linear decreasing inertia weight-particle swarm optimization （LDIW-PSO） algorithm to solve it. In order to verify the proposed method, we simulate the microgrid integration in a real industrial park under IEEE 33-bus system, whose results show that the proposed method can effectively improve the permeability of microgrid in distribution network.