电力系统自动化2017，Vol.41Issue(20)：55-62,8.DOI:10.7500/AEPS20170409002
角形级联型STATCOM不平衡工况下的无功功率控制策略
Reactive Power Control Strategy for Delta-connected STATCOM Under Unbalanced Condition
摘要
Abstract
In order to overcome the challenge of reactive power control under unbalanced voltage conditions,a reactive power control strategy is presented for delta-connected static synchronous compensator (STATCOM) to inject positive-and negativesequence reactive power flexibly by controlling the ratio between positive-and negative-sequence reactive power.The voltage of the point of common coupling (PCC) can be boosted by injecting positive-sequence while the negative-sequence voltage can be suppressed by injecting negative-sequence.Then,circulating current and phase current references under the unbalanced voltage are derived based on the instantaneous reactive power theory.The dynamic performance is fairly good using instantaneous commands.Moreover,peak current is limited in real-time to guarantee safe operation of STATCOM during asymmetrical voltage fault condition.Thus,the performance of STATCOM in engineering practice is improved.Simulation results are given to verify the performance of the proposed method.关键词
角形静止同步补偿器/正序无功功率/负序无功功率/电压不对称/最大电流限制Key words
delta-connected static synchronous compensator/positive-sequence reactive power/negative-sequence reactive power/unbalanced voltage/peak current limitation引用本文复制引用
易伟浪,何志兴,罗安,周发云,徐千鸣,岳雨霏..角形级联型STATCOM不平衡工况下的无功功率控制策略[J].电力系统自动化,2017,41(20):55-62,8.基金项目
国家自然科学基金资助项目(51237003).This work is supported by National Natural Science Foundation of China (No.51237003). （51237003）
