现有有功-无功资源配置下的分布式发电消纳问题研究

Research on Distributed Power Integration Problem Integrationunder Existing Active-Reactive Power Allocation

以清洁能源发电为代表的分布式发电(distribution generation,DG)接入会对配电网电压控制造成直接影响。统筹协调现有网络资源(包括有载调压变压器、电容器等无功调控设备,以及以柔性负荷为代表的有功配置资源等)与DG消纳之间的耦合特性,是清洁能源发电发展初期有条件消纳的必要手段。文章首先对"源、荷"不确定性因素进行量化建模,然后采用聚类算法抽取出可用于优化调度计算的典型场景;在此基础上,以最大化消纳分布式电源出力和降低网络有功损耗为目的建立优化调度模型并仿真。结果表明,由于当前电网普遍调控冗余度较大,在不新增调控资源条件下,充分挖掘现有手段能力,很大程度上可以实现清洁能源初期发展的大部分或全部消纳;到发展中后期,为保证较高清洁能源渗透率,新增优化调控资源势在必行。

Distribution generations, represented by clean energy sources, bring a direct impact on the distribution network voltage management. To coordinate the coupling relationships between the DGs integration and the existing network resources, including the on-load tap changer （ OLTC）, capacitor banks and f lexible load, has become a necessary measures to integrate the clean energy sources at the early stages o f development. F irs t ly, this paper models the uncertainty factor for f source and load5 in theory. And then, adopting the clustering algorithm to capture the typical scenarios which could be used to optimize the scheduling. On this basis 〉 the paper establishes an optimal scheduling model to maximize the integration o f DG output and reduce the network power loss. Case studies o f the modified IEEE 33-buses system showed that due to the large redundancy o f the current power grid control at the early stages o f clean energy sources development, making fu l l use o f the existing control measures can realize ful l integration at the early stages o f the clean energy sources development. And in the middle or last stages of the clean energy sources development to achieve the high penetration, there’ s a need to add new control sources.