直流微電網(wǎng)自適應(yīng)滑模控制策略
發(fā)布時間：2018-09-12 11:18
【摘要】：為提高微電網(wǎng)的穩(wěn)定性,提出一種集自適應(yīng)觀測技術(shù)、滑�？刂品椒ā⒍lPWM技術(shù)于一體的新型定頻PWM自適應(yīng)滑�？刂撇呗�,可在不需要增加額外傳感器/硬件電路的情況下實現(xiàn)對狀態(tài)變量的快速跟蹤和調(diào)節(jié),便于直流微電網(wǎng)內(nèi)微電源和負(fù)荷的擴展與即插即用,且簡化了濾波器的設(shè)計難度。同時,采用非線性復(fù)合控制方法在恒功率負(fù)載突變的情況下實現(xiàn)對母線電壓和系統(tǒng)穩(wěn)定控制的目標(biāo)。初始狀態(tài)的合理選擇、變切換面的設(shè)計,使得狀態(tài)變量全程處于滑動模態(tài),并且抖振現(xiàn)象得以減輕。在包含光伏電源、燃料電池、蓄電池、雙向Buck/Boost變換器、恒功率負(fù)載與阻性負(fù)載的直流微電網(wǎng)仿真環(huán)境中,驗證了所提控制方法的有效性。
[Abstract]:In order to improve the stability of microgrid, a novel adaptive sliding mode control strategy for fixed frequency PWM (PWM) is proposed, which integrates adaptive observation technique, sliding mode control method and fixed frequency PWM technology. The state variables can be quickly tracked and adjusted without adding additional sensors / hardware circuits, which is convenient for the expansion and plug and play of micro power and load in DC microgrid, and simplifies the difficulty of filter design. At the same time, the nonlinear compound control method is used to achieve the goal of bus voltage and system stability control under the condition of constant power load abrupt change. The reasonable selection of the initial state and the design of the variable switching surface make the state variable stay in the sliding mode all the time and the chattering phenomenon can be alleviated. The effectiveness of the proposed control method is verified in the DC microgrid simulation environment which includes photovoltaic power, fuel cell, battery, bidirectional Buck/Boost converter, constant power load and resistive load.
【作者單位】： 上海交通大學(xué)電子信息與電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(61374155) 高校博士點基金資助項目(20130073110030)~~
【分類號】：TM727
[Abstract]:In order to improve the stability of microgrid, a novel adaptive sliding mode control strategy for fixed frequency PWM (PWM) is proposed, which integrates adaptive observation technique, sliding mode control method and fixed frequency PWM technology. The state variables can be quickly tracked and adjusted without adding additional sensors / hardware circuits, which is convenient for the expansion and plug and play of micro power and load in DC microgrid, and simplifies the difficulty of filter design. At the same time, the nonlinear compound control method is used to achieve the goal of bus voltage and system stability control under the condition of constant power load abrupt change. The reasonable selection of the initial state and the design of the variable switching surface make the state variable stay in the sliding mode all the time and the chattering phenomenon can be alleviated. The effectiveness of the proposed control method is verified in the DC microgrid simulation environment which includes photovoltaic power, fuel cell, battery, bidirectional Buck/Boost converter, constant power load and resistive load.
【作者單位】： 上海交通大學(xué)電子信息與電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(61374155) 高校博士點基金資助項目(20130073110030)~~
【分類號】：TM727
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