New Maintenance Strategies for Generating Companies in Power Market

A new approach to maintenance scheduling of generating units(MSU)in competitive electricity markets was presented,which was formulated as a noncooperative game with complete information.The payoff of each generating company(Genco)was defined as the profit from the energy auction market minus maintenance cost and risk loss.The compensation fee of interruptible load was a part of the maintenance cost when the permitted maintenance capacity in the system was insufficient.Hourly energy auction was incorporated in the computation of both revenues from energy market and risk loss of maintenance strategy as a nested game.A new heuristic search algorithm for the calculation of the game equilibrium of MSU was presented,which coordinates the solutions of non-equilibrium,unique equilibrium and multiple equilibria.Numerical results for a two-Genco system and a realistic system were used to demonstrate the basic ideas and the applicability of the proposed method,as well as its computational efficiency.

考虑源荷功率矩不确定性的新型互联电力系统省内-省间分布鲁棒协调优化调度

为推动我国高比例清洁能源接入和高比例跨区电力输送的新型互联电力系统建设,降低源荷不确定性对清洁能源跨区消纳和省内-省间电力平衡的影响,提出考虑源荷功率矩不确定性的新型互联电力系统优化调度方法。首先,设计了计划-市场双轨制下新型互联电力系统省内-省间双层优化调度模式。其次,采用矩不确定集合刻画风光发电和负荷功率的不确定性,并提出由此引起的系统弃风弃光分布鲁棒条件风险度量模型。最后,以省间和省内总购电成本最小为目标,建立新型互联电力系统省内-省间分布鲁棒协调优化调度模型,并通过对偶优化理论将该模型转化为易求解的半定规划问题。数值仿真结果表明,所提模型促进了西部地区清洁能源跨省跨区消纳,降低受端系统运行成本的同时,有效提高了系统应对源荷功率不确定性波动的能力。

论美国产品研发中的“有控节余”策略

在信息经济时代 ,学习先进的产品研发管理模式是我国企业加强技术创新战略管理 ,提高研发水平的重要手段之一。通过介绍美国产品研发领域目前应用较多的“有控节余”(controlledscrimping)策略 ,比较了美、日两国采用该策略产生的不同效果 ,从而提出了该策略对我国企业产品研发方面的借鉴意义。“有控节余”策略应该在我国企业新产品研发战略中占有一席之地 ,在采用该策略时应注意规避相应的风险 ;同时还应鼓励企业或相关机构对其进行深入研究 ,以期帮助我国企业实现缩短产品研发周期 ,降低研发成本 ,从而获取迅速投放市场的优势。