CAJ | 학술논문

制定风电并网功率的爬坡限制指标可以有效抑制风电剧烈爬坡事件对电网频率偏差的影响.提出了一种考虑电网频率偏差的风电功率爬坡限制指标动态优化策略,根据电网的实时运行情况,对风电并网功率爬坡限制指标进行动态优化,使系统频率始终处于安全范围内.首先以电网的动态频率特性为基础,建立含一次调频和二次调频特性的电力系统频率仿真模型;然后利用二分法,根据电网频率偏差限值获得最优爬坡限制指标,从而有效避免了因固定爬坡限制指标过于宽松而导致的系统状态越限,以及爬坡限制指标过于苛刻而导致的风电场爬坡控制经济性较差的缺点.最后,通过IEEE RTS算例的仿真结果验证了所提策略的有效性.
제정풍전병망공솔적파파한제지표가이유효억제풍전극렬파파사건대전망빈솔편차적영향.제출료일충고필전망빈솔편차적풍전공솔파파한제지표동태우화책략,근거전망적실시운행정황,대풍전병망공솔파파한제지표진행동태우화,사계통빈솔시종처우안전범위내.수선이전망적동태빈솔특성위기출,건립함일차조빈화이차조빈특성적전력계통빈솔방진모형;연후이용이분법,근거전망빈솔편차한치획득최우파파한제지표,종이유효피면료인고정파파한제지표과우관송이도치적계통상태월한,이급파파한제지표과우가각이도치적풍전장파파공제경제성교차적결점.최후,통과IEEE RTS산례적방진결과험증료소제책략적유효성.
Specifying a wind power ramp limitation can reduce the impact of rapid wind power ramp event on system frequency deviation effectively. A dynamic optimization of wind power ramp limitation based on power system frequency deviation is proposed in this paper. The optimal wind power ramp limitation is updated according to the realtime condition of power grid to control the frequency deviation. A power system frequency simulation model is established based on the dynamic frequency characteristics analysis, including the primary and secondary frequency regulations. Then the dichotomy method is used to obtain the optimal wind power ramp limitation according to the threshold of frequency deviation. The proposed strategy can avoid off-limit of frequency due to a loose ramp limitation and minimize the economic cost of wind farm to meet the ramp limitation. Case studies based on IEEE Reliability Test System (IEEE RTS) verify the validity of proposed strategy.