电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
10期
62-67
,共6页
电池储能系统%PCS%正负序复合模型%低电压穿越
電池儲能繫統%PCS%正負序複閤模型%低電壓穿越
전지저능계통%PCS%정부서복합모형%저전압천월
BESS%PCS%positive-negative sequence composite mathematical model%LVRT
为了兼顾储能系统(Energy Storage System, ESS)对称及不对称电压故障时低电压穿越(Low Voltage Ride Through, LVRT)需要,针对目前其PCS控制的一些不足,重点研究了其实现LVRT的控制方法.建立了PCS的正、负序复合数学模型,设计了双d-q不平衡控制策略实现正、负序电流的有效控制.在此基础上,通过指令切换来实现LVRT过程中的有功、无功电流的分配与限制.并用PSCAD对一84 kW的电池储能系统进行了仿真,仿真结果表明所建立的正负序复合模型以及控制方法能够满足电网电压对称及不对称故障时的LVRT要求.
為瞭兼顧儲能繫統(Energy Storage System, ESS)對稱及不對稱電壓故障時低電壓穿越(Low Voltage Ride Through, LVRT)需要,針對目前其PCS控製的一些不足,重點研究瞭其實現LVRT的控製方法.建立瞭PCS的正、負序複閤數學模型,設計瞭雙d-q不平衡控製策略實現正、負序電流的有效控製.在此基礎上,通過指令切換來實現LVRT過程中的有功、無功電流的分配與限製.併用PSCAD對一84 kW的電池儲能繫統進行瞭倣真,倣真結果錶明所建立的正負序複閤模型以及控製方法能夠滿足電網電壓對稱及不對稱故障時的LVRT要求.
위료겸고저능계통(Energy Storage System, ESS)대칭급불대칭전압고장시저전압천월(Low Voltage Ride Through, LVRT)수요,침대목전기PCS공제적일사불족,중점연구료기실현LVRT적공제방법.건립료PCS적정、부서복합수학모형,설계료쌍d-q불평형공제책략실현정、부서전류적유효공제.재차기출상,통과지령절환래실현LVRT과정중적유공、무공전류적분배여한제.병용PSCAD대일84 kW적전지저능계통진행료방진,방진결과표명소건립적정부서복합모형이급공제방법능구만족전망전압대칭급불대칭고장시적LVRT요구.
@@@@In order to meet the requirement of low voltage ride through (LVRT) in the situation of both the balance and unbalance voltage fault in the energy storage system (ESS), considering the shortage of power conversion system (PCS), the LVRT control methods are studied, a positive-negative sequence composite mathematical model is built, a double d-q unbalance control strategy is designed and the positive-negative sequence current is controlled effectively. Based on that, the active and reactive current during the LVRT is distributed and limited through reference switching. At last simulation of a battery module (84 kW) in the case of grid fault based on the PSCAD is conducted, and the results show that the mathematical model built and the control method studied can meet the needs of the LVTR under both balance and unbalance grid fault. @@@@This work is supported by National Natural Science Foundation of China (No. 50807012).
