提出一种新型连续无功补偿装置,对其进行设计和仿真验证。首先给出了该补偿装置单相总体结构,在该结构中静止无功发生器(static var generator,SVG)和连接电容串联后并入电网,无源滤波器组直接接入电网。利用基尔霍夫定律推导出该结构...提出一种新型连续无功补偿装置,对其进行设计和仿真验证。首先给出了该补偿装置单相总体结构,在该结构中静止无功发生器(static var generator,SVG)和连接电容串联后并入电网,无源滤波器组直接接入电网。利用基尔霍夫定律推导出该结构的无功补偿容量,推导出谐波抑制函数并用其分析了该结构的谐波抑制原理及特性。该补偿装置同时能抑制谐波,特征次谐波由无源滤波器抑制,SVG的容量大大减少。仿真实验验证了该结构的可行性,同时具有良好的无功补偿和谐波抑制性能。展开更多
Conversion of hourly dispatch cases derived using DC optimal power flow(DCOPF)to AC power flow(ACPF)case is often challenging and requires arduous human analysis and intervention.This paper proposes an automated two-s...Conversion of hourly dispatch cases derived using DC optimal power flow(DCOPF)to AC power flow(ACPF)case is often challenging and requires arduous human analysis and intervention.This paper proposes an automated two-stage approach to solve ACPF formulated from DCOPF dispatch cases.The first stage involved the use of the conventional Newton Raphson method to solve the ACPF from flat start,then ACPF cases that are unsolvable in the first stage are subjected to a hotstarting incremental method,based on homotopy continuation,in the second stage.Critical tasks such as the addition of reactive power compensation and tuning of voltage setpoints that typically require human intervention were automated using a criteriabased selection method and optimal power flow respectively.Two datasets with hourly dispatches for the 243-bus reduced WECC system were used to test the proposed method.The algorithm was able to convert 100%of the first set of dispatch cases to solved ACPF cases.In the second dataset with suspect dispatch cases to represent an extreme conversion scenario,the algorithm created solved ACPF cases that satisfied a defined success criterion for 77.8%of the dispatch cases.The average run time for the hotstarting algorithm to create a solved ACPF case for a dispatch was less than 1 minute for the reduced WECC system.展开更多
文摘提出一种新型连续无功补偿装置,对其进行设计和仿真验证。首先给出了该补偿装置单相总体结构,在该结构中静止无功发生器(static var generator,SVG)和连接电容串联后并入电网,无源滤波器组直接接入电网。利用基尔霍夫定律推导出该结构的无功补偿容量,推导出谐波抑制函数并用其分析了该结构的谐波抑制原理及特性。该补偿装置同时能抑制谐波,特征次谐波由无源滤波器抑制,SVG的容量大大减少。仿真实验验证了该结构的可行性,同时具有良好的无功补偿和谐波抑制性能。
基金This work was supported by the ERC Program of the National Science Foundation and DOE under NSF Award Number EEC-1041877the CURENT Industry Partnership Program,and the Bredesen Centre,University of Tennessee,Knoxville.
文摘Conversion of hourly dispatch cases derived using DC optimal power flow(DCOPF)to AC power flow(ACPF)case is often challenging and requires arduous human analysis and intervention.This paper proposes an automated two-stage approach to solve ACPF formulated from DCOPF dispatch cases.The first stage involved the use of the conventional Newton Raphson method to solve the ACPF from flat start,then ACPF cases that are unsolvable in the first stage are subjected to a hotstarting incremental method,based on homotopy continuation,in the second stage.Critical tasks such as the addition of reactive power compensation and tuning of voltage setpoints that typically require human intervention were automated using a criteriabased selection method and optimal power flow respectively.Two datasets with hourly dispatches for the 243-bus reduced WECC system were used to test the proposed method.The algorithm was able to convert 100%of the first set of dispatch cases to solved ACPF cases.In the second dataset with suspect dispatch cases to represent an extreme conversion scenario,the algorithm created solved ACPF cases that satisfied a defined success criterion for 77.8%of the dispatch cases.The average run time for the hotstarting algorithm to create a solved ACPF case for a dispatch was less than 1 minute for the reduced WECC system.
