基于最优分割法的含DG配电网动态无功优化

发布时间：2019-01-12 16:13

【摘要】：为解决有载调压变压器分接头(on-load tap changer,OLTC)、电容器组和分布式电源(distributed generation,DG)的协调优化问题,提出一种配电网动态无功优化方法。该方法采用最优分割法分别对OLTC和电容器组的静态最优投切序列进行有序聚类,在满足最大动作次数约束的前提下实现控制设备在时间上的解耦。分析了常见DG无功出力极限的影响因素,考虑OLTC、电容器组和DG在电压无功调节中的控制能力,提出三者的协调优化方法。由于OLTC的档位调节直接影响整个线路的电压无功分布,首先根据各时刻的静态优化结果和最优分割法确定OLTC的动作时刻及档位;然后,采用最优分割法确定电容器组的动作时刻,并将电容器组的投切容量和DG无功出力联合优化,得到最终的控制方案。最后,通过某实际电网算例验证了所提方法的合理性和有效性。
[Abstract]:In order to solve the problem of coordinated optimization of tap connector (on-load tap changer,OLTC), capacitor bank and distributed generation (distributed generation,DG) of on-load transformer, a dynamic reactive power optimization method for distribution network is proposed. The optimal segmentation method is used to cluster the static optimal switching sequences of OLTC and capacitor banks in an orderly manner. The decoupling of the control equipment in time is realized on the premise that the maximum number of action constraints are satisfied. The influence factors of reactive power limit of DG are analyzed. Considering the control ability of OLTC, capacitor bank and DG in voltage and reactive power regulation, a coordinated optimization method is proposed. Because the gear adjustment of OLTC directly affects the voltage and reactive power distribution of the whole line, firstly, according to the static optimization results of each time and the optimal partition method, the action time and gear of the OLTC are determined. Then, the optimal division method is used to determine the action time of the capacitor bank, and the switching capacity of the capacitor bank and the DG reactive power are jointly optimized, and the final control scheme is obtained. Finally, the rationality and validity of the proposed method are verified by a practical power grid example.
【作者单位】：中国农业大学信息与电气工程学院;
【分类号】：TM714.3

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