多电压等级不平衡主动配电网电压无功自适应多目标协调优化  

Adaptive and Coordinated Volt/Var Optimization for Unbalanced Active Distribution Networks of Multiple Voltage Levels

作　　者：符杨 周晓鸣 苏向敬 FU Yang;ZHOU Xiaoming;SU Xiangjing(College of Electrical Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai 200090, Chin)

机构地区：[1]上海电力学院电气工程学院

出　　处：《电网技术》2018年第7期2136-2144,共9页Power System Technology

基　　金：国家重点研发计划项目(2017YFB0902800);上海市浦江人才计划项目(17PJ1403000)~~

摘　　要：高间歇性DG持续大量接入给传统配电网电压无功控制带来严峻挑战。利用新兴DG与传统设备（如电容器、OLTC等）进行电压无功协调控制显得尤为重要。然而,现有协调控制研究多采用负荷与出力的日前预测,并基于平衡网络模型和单一电压等级假设,导致其控制结果不合理或不可行。为应对上述技术挑战,基于主动配电网双向信息通信并采用自适应动态权重策略,提出一种含中压（三相三线）和低压（三相四线）的多电压等级不平衡主动配电网电压无功自适应协调优化控制策略。通过中压侧传统三角形开关电容器与低压侧新兴分布式光伏逆变器的协调控制,实现网损、电压幅值、不平衡度、电容器动作成本及光伏逆变器出力成本的综合运行优化。为有效求解上述配网最优潮流问题,采用改进直接法潮流和粒子群算法进行联合求解。最后,基于某澳大利亚真实配电网开展24 h多场景仿真,以验证所提电压无功控制的可行性、有效性及优越性。Increasing penetration of intermittent distributed generations（DGs） raises great challenge to distribution volt/var management. Coordinated volt/var control by emerging DGs and traditional devices（e.g. capacitors, on-load tap changers（OLTCs） etc.） is essential. However, existing coordinated volt/var control studies are mainly based on day-ahead load and generation forecasts, fixed optimization weights, balanced configuration and single-voltage level, leading to unreasonable control solutions. Based on the increasing availability of bi-way information and communication infrastructures, a real-time coordinated volt/var control strategy with adaptive optimization weights for integrated 3-wire MV and 4-wire LV radial distribution networks is proposed. By coordinating the traditional MV delta switched capacitors and the emerging LV distributed PV inverters, operation performance including network losses, voltage balance and magnitude profiles, as well as operation costs of capacitors and PV inverters are simultaneously optimized. To effectively and efficiently solve the proposed distribution optimal power flow problem, an improved direct load flow combined with a modified particle swarm optimization method is employed. Finally, detailed simulations on a real Australian distribution network over 24 hours are performed to prove the feasibility, effectiveness and superiority of the proposed adaptive and coordinated volt/var optimization strategy.

关 键 词：电压无功控制 主动配电网 不平衡网络 多目标优化 协调优化控制 

分 类 号：TM721[电气工程—电力系统及自动化]