适应大规模分布式光伏并网的无功电压控制方法

为避免大规模分布式光伏并网影响配电网的总体电压,提出一种适应大规模分布式光伏并网的无功电压控制方法。通过光伏逆变器、静止同步补偿器及并联电容器等三者的相互协调进行分布式光伏并网的无功电压控制,并以有功网损、补偿容量和电压偏差最小为目标,结合系统潮流约束、节点电压约束、并联电容器投切次数约束,构建无功电压控制方法,经改进的灰狼优化算法求解后,可得出适应大规模分布式光伏并网的最优调节方案。实验结果表明,此方法可以根据光伏公共连接点的电压越限情况自动调节无功电压,快速准确地计算出最优调节方案,减少有功网损,提高配电网的电能质量和资源利用率。

全面信息共享机制是否最有效率:理论分析与欧盟国家的最新经验证据

一、引言国家发改委副主任连维良在2016年6月全国社会信用体系建设工作会议上指出:'要用四个倒逼机制实现更宽范围、更深程度的共享,以更大的力度创造性地推动社会信用体系建设'。在国家政策的引导下,不仅从中央到各级地方政府信用信息共享共建步入强力推进轨道,而且以BAT(百度、阿里巴巴、腾讯三大互联网公司)为代表的互联网征信也在积极寻求合作与发展。毋庸置疑,我国信息共享机制建设已逐步上升到国家战略高度,将对我国经济社会产生深远影响。

Double-bosonization and Majid's conjecture(IV): Type-crossings from A to BCD

Both in Majid's double-bosonization theory and in Rosso's quantum shuffle theory, the rankinductive and type-crossing construction for U_q(g)'s is still a remaining open question. In this paper, working in Majid's framework, based on the generalized double-bosonization theorem we proved before, we further describe explicitly the type-crossing construction of U_q(g)'s for(BCD)_n series directly from type An-1via adding a pair of dual braided groups determined by a pair of(R, R′)-matrices of type A derived from the respective suitably chosen representations. Combining with our results of the first three papers of this series, this solves Majid's conjecture, i.e., any quantum group U_q(g) associated to a simple Lie algebra g can be grown out of U_q(sl_2)recursively by a series of suitably chosen double-bosonization procedures.

DECOMPOSITIONS OF BOSONIC MODULES OF LIE ALGEBRAS W_(1+∞) AND W_(1+∞)(gl_N)

A bosonic construction (with central charge c = 2) of Lie algebras W1+∞ and W1+∞ (glN), as well as the decompositions into irreducible modules are described. And for W1+∞, when restricted to its Virasoro subalgebra Vir, a bosonic construction and the same decomposition for Vir are obtained.