摘要
由于高耗能负荷的非线性和时变性,且高密度集中接入时形成高耗能点负荷情形,造成电网电压频繁波动和越限,由于时间尺度不同,二次电压调节难以有效解决该问题。对此,提出发电机组励磁调差系数优化整定策略来改善高耗能点负荷接入带来的不利影响。从降低全网网损和电压波动的角度出发,建立考虑网损最小、中枢节点及高耗能点电压波动指标的多目标函数,对励磁调差系数进行整定,采用改进权重与免疫算法结合的粒子群算法求解。以IEEE 39节点系统为算例进行验证,表明所提出的励磁系统调差系数经优化整定方法能够避免由于高耗能点负荷节点并网发生低压越限的情况,同时有效降低全网网损,提高电网运行的经济性和可靠性。
Aiming at the nonlinearity and time-varying of high energy consumption load,high-density centralized load forms a high-energy point load situation,causing frequent fluctuations and over-limits of the grid voltage.Due to different time scales,secondary voltage regulation is hard to overcome the problem.In this paper,the optimal setting strategy of excitation system adjustment coefficient of generator set is proposed to improve the adverse effect of high energy consumption point load access.From the perspective of reducing the network losses and voltage fluctuation,a multi-objective function considering the load voltage fluctuation of the network losses and the central node and the high energy consumption point is established.The particle swarm optimization algorithm combined with the improved weight and immune algorithm is used to solve the problem.Taking the IEEE39 node system as an example,the result proves that after the optimization,the situation that the low voltage exceeds the limit can be avoided,the network losses are effectively reduced,and the economic and reliability of the power grid operation is improved.
作者
颜湘武
李若瑾
Yan Xiangwu;Li Ruojin(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source,North China Electric Power University,Beijing 102206,China)
出处
《电测与仪表》
北大核心
2021年第2期96-100,共5页
Electrical Measurement & Instrumentation
基金
河北省自然科学基金资助项目(E2018502134)
国网辽宁省电力有限公司科技项目(SGLNDK00DWJS1800091)。
关键词
高耗能点负荷
励磁系统调差系数
改进粒子群算法
high energy consumption point load
excitation system adjustment coefficient
improved particle swarm optimization
