【作者】 唐杰阳；

【导师】 丁晓群；

【作者基本信息】 河海大学 ， 电力系统及其自动化， 2006， 硕士

【摘要】 在线无功优化控制系统是保证系统安全、经济运行的一项有效手段,是降低网损、提高电压质量的重要措施。因此,无功优化问题的研究,既有理论意义,又有实际应用价值。 无功优化问题是一个多变量、多约束的混合整数非线性规划问题,其操作变量既有连续变量又有离散变量,使得优化过程十分复杂。本文分析了遗传算法在处理离散变量和原对偶内点法处理连续变量的优势,提出一种基于设备动作优先级并利用遗传算法和原对偶内点法的解耦组合算法思路,通过IEEE-30节点系统仿真验证了该解耦组合算法的可行性。 为了满足无功优化在线控制的要求,需要对算法以及控制两部分制定实用化改进策略。算法的实用化策略分为:①改进遗传算法策略,即构造实用的目标函数,对遗传算法的适应度函数和群体多样性的保持进行改进,提高算法的全局收敛能力和收敛速度;②组合算法的协调策略,即利用短期负荷预报,对未来一天系统负荷水平进行分段,根据负荷水平确定的无功补偿控制设备动作优先级,以此来确定组合算法的实现思路。控制策略分为算法实用化控制策略和闭环安全控制策略。 基于改进遗传算法以及实用化策略,研发了目前处于开环运行的黑龙江省调主站AVC系统。详细地介绍了整个系统的架构、功能模块、软件界面。优化结果分析表明,该系统实用性强,控制设备动作合理,离散设备动作次数少,能有效地提高电网的电压合格率和降低电网损耗。更多还原

【Abstract】 Online reactive power optimization control system is one of the most important control methods to ensure power system operation securely and economically, and an effective measure to improve the voltage profile and reduce the loss. Research of reactive power optimization has the great significance in theory and practical application.Reactive power optimization is a large-scale nonlinear optimization problem with a large number of variables and uncertain parameters, the operating variables include continuous and discrete variables, so the optimization becomes very complex. The thesis analysises the superiority of genetic algorithm in dealing with discreate variables and primal-dual interior point method in dealing with continuous variables, and brings forward a discoupled combined algorithm which is based on the equipment control priority and take advantage of genetic algorithm and primal-dual interior point method, and the emulator of IEEE-30 bus system validates the fesability of the discoupled combined algorithm. Pratical improved strategy for algorithm and control module is needed to satisfy the requirement of online reactive power optimal control system. Pratical algorithm stategy includes: (Dpratical genetic algorithm strategies in order to improve global converge ability and speed, ?discoupled combined algorithm harmony strategies. Control strategies include pratical algorithm control strategies and close loop security control strategies.HeiLongjiang province power grid AVC system is designed, now on open loop operation and is based on improved genetic algorithm and pratical strateies. The thesis introduces in detail the structure of system, function module, and interface. The practical application results show that the action of control equipments is rational, the times of disperse equipment action are less, the voltage qualification rate can be effectively improved and the network loss is reduced and this application is successful.更多还原