黑山峡河段不同开发方案发电收益及税费分析

针对黄河黑山峡河段的一级开发、一级分期开发、四级开发方案,通过查阅相关资料,以新增收益电量和新增增值税计税电量为指标,对不同开发方案的电力开发收益、地方税费收入进行了分析核算。结果表明:一级开发方案电力收益和地方税费收入增加明显,并可大幅度提高上游梯级电站电力生产效益;一级分期开发方案本级电站新增电力开发收益和地方税费收入与四级开发方案持平,但可有效增加甘肃省、青海省的地方税费收入。

计及跨区电力传输风险的多目标经济调度

考虑传统调度模型采用经济性目标的不合理性,从售电收入、购电成本和违约成本3个方面构建收益指标;定义跨区电力传输风险,描述区域间电能传输的不确定性;以最大化地区电网的电力交易收益和最小化跨区电力传输风险为目标,构建多目标经济调度模型;采用改进的多目标粒子群算法求取最优解集,进而根据加权余弦排序法进行决策。某地区电网算例仿真结果表明:该调度方法能使电网在承担合理的风险值下提高收益,适用于不同的负荷水平。

并网光伏发电价值的综合评价

针对目前并网光伏发电成本高的现状,为鼓励政府加大补贴力度,综合考虑并网光伏发电的发电成本、辅助服务成本、发电收益、社会环保效益、社会经济收益等因素,构建了并网光伏发电的综合价值模型,并使用实际数据分析了我国并网光伏发电的综合价值。算例结果表明,并网光伏发电综合价值很高,政府可加大光伏产业的补贴力度。

Smart Meters and Under-Frequency Load Shedding

In some countries, there exists a risk of power deficit in the EPS （electrical power system）. This is a very serious problem and there are various solutions to deal with it. A power deficit in the EPS leads to frequency decrease in the power system. A dedicated automation to load shedding is used to maintain proper EPS operation. For some time, it has applied a mechanism called demand-side response, which in case of an emergency situation allows for a ＂more civilized＂ rationing of electricity to customers, with their consent. Such programs require that the utilities pay the customers for their agreement. The author proposes a new solution, intermediate between strict ALS （acting relieving automation） and demand-side response programs, where the companies have to send information about the price of energy or control signals to households.