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风电参与一次调频下电力系统的动态潮流计算 被引量:1

Dynamic Power Flow Calculation of Power System With Wind Power Generation Participating in Primary Frequency Regulation
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摘要 风电机组参与电网一次调频是风电技术发展的趋势,其一次调频特性不同于常规同步发电机组。动态潮流主要模拟电力系统出现扰动后的一次调频过程,其计算主要由频率计算和常规潮流计算两部分组成。针对含风电一次调频电力系统的动态潮流计算,建立采用超速与变桨协调调频控制策略的变速风电机组一次调频特性;频率计算中提出不平衡功率分段分配方法,并采用一级三步RK法求解系统频率微分方程;常规潮流计算中提出4种新型节点类型,采用传统牛顿拉夫逊法求解节点功率方程组。改造后的IEEE 14节点算例系统动态潮流计算结果验证了所提方法的正确性和有效性,为风电参与一次调频的分析及其控制系统设计提供了一定的依据。 There is an increasing tendency for wind power generation to participate in primary frequency regulation (PFR). The PFR characteristics of wind turbines are different from those of conventional synchronous generators. Dynamic power flow is mainly used to simulate PFR process of power system under disturbance. Dynamic power flow calculation is composed of frequency calculation and conventional power flow calculation. Aiming at dynamic power flow calculation of power system with wind power generation participating in PFR, characteristics of variable-speed wind turbines participating in PFR with coordinated over-speed control and pitch control are established in this paper. Further, in frequency calculation of dynamic power flow, unbalanced power subsection distribution method is proposed, and one-level three-step Runge-Kutta (RK) method is employed to solve system frequency differential equations. In conventional power flow calculation of dynamic power flow, four new node types are proposed, and traditional Newton-Raphson algorithm is used to solve node power equations. Correctness and validity of the proposed method are verified in a modified IEEE 14 system, providing a basis for analysis and control design of the system with wind power generation participating in PFR.
出处 《电网技术》 EI CSCD 北大核心 2017年第8期2553-2560,共8页 Power System Technology
基金 国家自然科学基金项目(51507149)~~
关键词 风力发电 一次调频 动态潮流 不平衡功率分段分配方法 一级三步RK法 wind power generation primary frequency regulation dynamic power flow unbalanced power subsection distribution method one-level three-step RK method
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