CAJ | 학술논문

大规模风电场集中接入电网将导致系统惯性降低，调频能力不足，为解决此问题，提出了变速风电机组的频率综合控制方案。根据变速风电机组调频所需的备用容量，提出风电机组的减载控制方案，并解决惯性与一次调频控制的结合问题。通过分析风电机组的一次调频特性，利用变桨技术，进一步提出可整定风电机组静调差系数的频率控制策略，并与虚拟惯性控制有机结合，实现风电机组对系统频率的综合控制。通过仿真分析验证了在所提控制方案下，变速风电机组利用其可控的调频能力，不仅能够有效支持系统惯性，减小系统扰动初期频率的变化率，并可按照整定的静态频率特性，提高系统的静态频率稳定性。
대규모풍전장집중접입전망장도치계통관성강저，조빈능력불족，위해결차문제，제출료변속풍전궤조적빈솔종합공제방안。근거변속풍전궤조조빈소수적비용용량，제출풍전궤조적감재공제방안，병해결관성여일차조빈공제적결합문제。통과분석풍전궤조적일차조빈특성，이용변장기술，진일보제출가정정풍전궤조정조차계수적빈솔공제책략，병여허의관성공제유궤결합，실현풍전궤조대계통빈솔적종합공제。통과방진분석험증료재소제공제방안하，변속풍전궤조이용기가공적조빈능력，불부능구유효지지계통관성，감소계통우동초기빈솔적변화솔，병가안조정정적정태빈솔특성，제고계통적정태빈솔은정성。
Large scale integration of wind farms may cause the issue of low inertia and lack of ability of frequency regulation in power systems. In this paper, the integrated frequency control strategy of variable speed wind turbines was proposed. According to the reserve capacity required for frequency regulation, a de-loading control scheme was proposed to resolve the problem of combination of inertia and primary frequency regulation. Based on the analysis of the primary frequency regulation characteristics of wind turbines, the frequency control scheme, by which the static frequency difference coefficient can be adjusted, was further proposed by adopting variable pitch. In addition, the integrated frequency control of wind turbines can be achieved with the combination of the virtual inertia control and the frequency control. Simulation results show that by using the proposed control schemes, variable speed wind turbines with the controllable ability of frequency regulation, can provide the effective inertia support to reduce the system frequency change rate in the initial period, and enhance the system static frequency stability according to the static frequency characteristics.