CAJ | 학술논문

配电系统状态估计是实现配电网智能调度的前提，分布式电源的不断接入是智能电网发展的必然趋势，在基于支路电流状态估计方法的基础上研究了分布式电源的接入对弱环配电网状态估计结果的影响，并在改进的IEEE36节点弱环系统上进行了仿真。结果表明，分布式电源的加入，增加了配电网状态估计的冗余度，能够提高整个系统状态估计的精度，并且随着分布式电源对配电网渗透水平的提高，系统状态估计的精度也在不断增加；随着分布式电源不断地向根节点方向渗透，状态估计精度在不断减小。说明分布式电源远离根节点接入时，能获得更好的状态估计结果。
배전계통상태고계시실현배전망지능조도적전제，분포식전원적불단접입시지능전망발전적필연추세，재기우지로전류상태고계방법적기출상연구료분포식전원적접입대약배배전망상태고계결과적영향，병재개진적IEEE36절점약배계통상진행료방진。결과표명，분포식전원적가입，증가료배전망상태고계적용여도，능구제고정개계통상태고계적정도，병차수착분포식전원대배전망삼투수평적제고，계통상태고계적정도야재불단증가；수착분포식전원불단지향근절점방향삼투，상태고계정도재불단감소。설명분포식전원원리근절점접입시，능획득경호적상태고계결과。
The state estimation for a distribution system is the premise of intelligent scheduling of distribution net-works, and the continuous access of distributed power is the inevitable trend of the development of the smart grid. With the algorithm of state estimation based on branch currents, the impacts of the access of the distributed genera-tion on the result of state estimation for the weakly meshed distribution network are researched in this paper.The simulation on the improved weakly meshed system of the IEEE36 node shows that, the access of distributed power can increase the redundancy of state estimation, and improve the accuracy of state estimation on the whole system. With the improvement of the penetration level of the distribution network by the distributed generation , the state es-timation accuracy is also increasing;with the penetration of distributed generations to the root node, the state esti-mation accuracy decreases, and it can be explained that, the more away from the root node, the better the state es-timation results can be got.