The existing high-voltage transmission lines are mostly high-voltage AC,power grid is the AC/VSC-HVDC parallel transmission system in a long period of time with the addition of VSC-HVDC technology,increasing the complexity of the power flow distribution.Because of the lack of basis in receiving active power command value,this paper presents a multi-objective optimization method,considering multiple objectives and establishing the objective functions.Using the method of operational research and LINGO software to solve the mathematical model,then we know the distribution of active power on AC and DC power lines.Finally,the feasibility of this method is proved by the example of Nanhui Demonstration Project in Shanghai.Compared with other algorithms,this method is simple and fast.The proposed multi-objective optimization method can reduce the loss of power grid and ensure the sefety and reliability.%现有的高压输电线路,多采用电压等级高的交流电传输,随着柔性直流输电技术的不断发展,电网将呈现交直流混合的格局,使得电网的潮流分布更趋复杂性.目前的电力调度部门,关于交直流并列运行的有功功率指令值的确定没有具体方法.因此,提出了一种多目标优化算法,计及多个约束条件,建立目标函数.运用运筹学的方法,使用LINGO软件对该数学模型进行求解,得出交直流线路上的有功功率分配值.通过上海南汇示范工程作为算例验证此方法的可行性,与其他的算法相比,该方法简洁快速;提出的多目标优化方法既能降低电网的损耗又能保证系统安全可靠运行.
展开▼
