分布式电源多点、大规模接入电网改变了电网结构,同时也使其运行方式发生改变,不恰当的分布式电源选址定容会使配电网的电压质量下降,出现反向潮流等问题。针对该问题,建立以综合成本、有功网损和新型线路电压稳定指标值最小为目标的分布式电源优化配置模型,并采用佳点集、非线性余弦收敛因子和分布估计策略对传统灰狼优化算法进行相关改进,结合IEEE 33节点配电网进行算例分析,发现分布式电源并网后配电网运行成本降低、系统网损显著减少、电网电压稳定性有所改善,验证了改进灰狼优化算法(Improved Grey Wolf Optimization
IGWO)比传统灰狼优化算法(Grey Wolf Optimization
GWO)及其他优化算法在选址定容方面更具优势。
Abstract
The large-scale integration of distributed power sources at multiple points into the power grid is fundamentally changing the structure and operational characteristics of the grid. Improper site selection and capacity determination of distributed power sources can lead to a degradation in voltage quality and the occurrence of phenomena such as reverse power flow. To address the issue
a distributed power generation optimization configuration model is established with the goal of minimizing comprehensive costs
active power network losses
and the values of novel line voltage stability index. The traditional grey wolf optimization(GWO) algorithm is improved through best point set
nonlinear cosine convergence factor
and distribution estimation strategies. Case studies are conducted using the IEEE 33-node distribution network
revealing that the integration of distributed generation leads to reduce operation costs
significant reductions in line losses
and improvements in grid voltage stability. Thus
the case studies validate that the improved grey wolf optimization(IGWO) algorithm
compared to the traditional GWO algorithm and other optimization algorithms
demonstrates superior advantages in site selection and capacity determination for distributed generations.
Jian XU,Tiankai LAN,Siyang LIAO,Yuanzhang SUN,Deping KE,Xiong LI,Jun YANG,Xiaotao PENG.An on-line power/voltage stability index for multi-infeed HVDC systems[J].Journal of Modern Power Systems and Clean Energy,2019(05).