应用科技
應用科技
응용과기
YING YONG KE JI
2014年
3期
46-50
,共5页
逆变器%并网%单相锁相环%LCL滤波器%有源阻尼控制%仿真
逆變器%併網%單相鎖相環%LCL濾波器%有源阻尼控製%倣真
역변기%병망%단상쇄상배%LCL려파기%유원조니공제%방진
inverter%grid-connected%single-phase phase-locked loop%LCL filter%active damping control%simulation
单相并网逆变器广泛地应用在新能源发电领域，它的一个关键技术就是对电网电压的锁相。分析了基于Park变换的锁相环原理，并进行了改进。针对并网逆变器采用的LCL滤波器，采用了基于电容电流前馈的有源阻尼控制方案，推导了LCL滤波器的模型，在此基础上加入电容电流前馈，推导出加入前馈后的数学模型，给出了不同前馈系数的bode图，分析出不同前馈系数的变化趋势。通过单相并网逆变器的仿真实验，验证了改进型锁相环和有源阻尼控制的正确性。搭建了硬件平台，进行了并网硬件实验，验证了以上理论的正确性和可行性。
單相併網逆變器廣汎地應用在新能源髮電領域，它的一箇關鍵技術就是對電網電壓的鎖相。分析瞭基于Park變換的鎖相環原理，併進行瞭改進。針對併網逆變器採用的LCL濾波器，採用瞭基于電容電流前饋的有源阻尼控製方案，推導瞭LCL濾波器的模型，在此基礎上加入電容電流前饋，推導齣加入前饋後的數學模型，給齣瞭不同前饋繫數的bode圖，分析齣不同前饋繫數的變化趨勢。通過單相併網逆變器的倣真實驗，驗證瞭改進型鎖相環和有源阻尼控製的正確性。搭建瞭硬件平檯，進行瞭併網硬件實驗，驗證瞭以上理論的正確性和可行性。
단상병망역변기엄범지응용재신능원발전영역，타적일개관건기술취시대전망전압적쇄상。분석료기우Park변환적쇄상배원리，병진행료개진。침대병망역변기채용적LCL려파기，채용료기우전용전류전궤적유원조니공제방안，추도료LCL려파기적모형，재차기출상가입전용전류전궤，추도출가입전궤후적수학모형，급출료불동전궤계수적bode도，분석출불동전궤계수적변화추세。통과단상병망역변기적방진실험，험증료개진형쇄상배화유원조니공제적정학성。탑건료경건평태，진행료병망경건실험，험증료이상이론적정학성화가행성。
Single-phase grid-connected inverter is widely used in the field of new energy power generation , one of its key technologies is phase locked loop of the power grid voltage .The principle of the phase-locked loop based on Park transform was analyzed , and some improvements were made on the basis of this method .For the LCL filter used in the grid-connected inverter , the active damping control scheme based on capacitive current feed-forward was adopted .First the LCL filter model was deduced , on the base of this model the capacitor current feed-forward was added .On the basis of this model the bode diagram was built at different feed-forward coefficient and the change trend at different feed-forward coefficient was analyzed .Then the simulation experiment of single phase grid-connected inverter was made and the hardware platform of it was set up , which verified the correctness of the im-proved phase-locked loop and the active damping control .
