电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2014年
2期
478-483
,共6页
张元吉%赵晋斌%王亚维%屈克庆%李芬
張元吉%趙晉斌%王亞維%屈剋慶%李芬
장원길%조진빈%왕아유%굴극경%리분
单相逆变器%电压控制%等效阻抗%频率控制%幅值控制
單相逆變器%電壓控製%等效阻抗%頻率控製%幅值控製
단상역변기%전압공제%등효조항%빈솔공제%폭치공제
single-phase inverter%voltage control%equivalent impedance%frequency control%amplitude control
对于大量分布式电源接入配电网引起的高渗透率问题,传统的电流控制型逆变器在电网电压及频率的调节、电网故障时无缝切换等方面存在困难,为此提出了一种单相电压控制型策略。通过控制环路的设计和控制参数的设定,使得等效阻抗精确可控,且从外特性上可模拟同步发电机的频率及电压控制特性,使逆变器具备调节电网电压和频率的功能,提升电网对分布式电源接纳能力。仿真及实验结果验证了控制策略的有效性。
對于大量分佈式電源接入配電網引起的高滲透率問題,傳統的電流控製型逆變器在電網電壓及頻率的調節、電網故障時無縫切換等方麵存在睏難,為此提齣瞭一種單相電壓控製型策略。通過控製環路的設計和控製參數的設定,使得等效阻抗精確可控,且從外特性上可模擬同步髮電機的頻率及電壓控製特性,使逆變器具備調節電網電壓和頻率的功能,提升電網對分佈式電源接納能力。倣真及實驗結果驗證瞭控製策略的有效性。
대우대량분포식전원접입배전망인기적고삼투솔문제,전통적전류공제형역변기재전망전압급빈솔적조절、전망고장시무봉절환등방면존재곤난,위차제출료일충단상전압공제형책략。통과공제배로적설계화공제삼수적설정,사득등효조항정학가공,차종외특성상가모의동보발전궤적빈솔급전압공제특성,사역변기구비조절전망전압화빈솔적공능,제승전망대분포식전원접납능력。방진급실험결과험증료공제책략적유효성。
In view of the fact that there are difficulties in the adjustment of network voltage and frequency and the seamless switching during fault occurred in distribution network it is hard for traditional current-controlled inverter to cope with the high penetration caused by connecting a lot of distributed generations to distribution network. For this reason, a control strategy based on single-phase voltage-controlled inverter is proposed. Through the design of control loop and setting of control parameters, the equivalent impedance is controllable accurately, besides, its external characteristics can simulate the frequency and voltage control characteristic of synchronous generator to make the inverter possessing the function of adjusting both network voltage and frequency, thus the ability of distribution network to accommodate distributed generation is enhanced. The effectiveness of the proposed control strategy is validated by results of both simulation and experiments.