CN112332443B - 一种孤岛微网分布式最优频率调控方法及系统 - Google Patents
一种孤岛微网分布式最优频率调控方法及系统 Download PDFInfo
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Abstract
本发明公开了一种孤岛微网分布式最优频率调控方法及系统,该方法包括如下步骤:根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,其中,ξi(t)为第i个分布式电源在t时刻的有功功率输出控制策略调节量,ξi(t)按更新规律动态更新;根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略。本发明还提供一种孤岛微网分布式最优频率调控系统。本发明针对目前孤岛微网易遭受信息网络数据篡改攻击的问题,孤岛微网中的每个分布式电源通过通信连接及冗余通信连接与邻居交互信息,并执行分布式最优频率调控方法,实现信息网络数据篡改攻击下的孤岛微网频率稳定及出力经济性。
Description
技术领域
本发明涉及一种分布式最优频率调控方法及系统,尤其涉及一种孤岛微网分布式最优频率调控方法及系统。
背景技术
由于能源危机及环境污染等问题,当今的电力系统产生了巨大的改变。由于其低污染、可再生及广泛分布特性,越来越多的分布式能源整合入电力系统以应对上述问题。但由于分布式能源的不确定性及出力间歇性等特征,其大量的整合使得当今的电力系统稳定运行面临新的挑战。在此情形下,微网的概念应运而生。微网是一个整合一定范围内的分布式电源,储能及负荷的低压电力系统,是实现未来智能电网的一种有效方式,协调了传统集中式发电与分布式发电间的矛盾,并能够充分利用分布式发电为电网和用户带来价值和效益,其概念的引入为分布式电源向电力系统的整合提供了充分的保障。
当微网运行于孤岛模式下时,需通过自身的控制策略实现其经济稳定运行。频率稳定与出力经济性是孤岛微网经济稳定运行的两个核心需求,需设计满足上述需求的最优频率调控策略。传统的最有频率调控策略通常基于集中式控制架构,其具有动态性能差、构建成本高、鲁棒性及可扩展性差等缺陷,不适用于广泛分布式电源接入下的孤岛微网环境。如前所述,孤岛微网分布式最优频率调控策略的执行依赖于微网中各分布式电源间经由信息网络的信息交互。由于孤岛微网信息网络的开放性及脆弱性,其易遭受信息篡改攻击。针对信息网络的数据篡改攻击最终将导致分布式最优频率调控策略的性能下降,甚至使得控制任务失败,影响孤岛微网经济稳定运行。
发明内容
发明目的:本发明的第一目的为提供一种能够抵御信息网络数据篡改攻击对孤岛微网经济稳定运行的影响、实现信息网络数据篡改攻击下的孤岛微网频率稳定、同时保证分布式电源的出力经济性的孤岛微网分布式最优频率调控方法,本发明的第二目的为提供一种孤岛微网分布式最优频率调控系统。
技术方案:本发明的孤岛微网分布式最优频率调控方法,包括如下步骤:
(1)根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,其中,ξi(t)为第i个分布式电源在t时刻的有功功率输出控制策略调节量,ξi(t)按更新规律动态更新;
(2)根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略。
有功功率输出控制策略调节量ξi(t)的更新规律为:
式中,ηj(t)为第j个分布式电源在t时刻的有功功率输出控制策略修正量,ηi(t)为第i个分布式电源在t时刻的有功功率输出控制策略修正量,与分别表示第i个与第j个分布式电源在t时刻的经信息网络数据篡改攻击后的有功功率输出控制策略调节量,c为常数。优选的,常数c的取值范围为c>0。
有功功率输出控制策略修正量ηi(t)的更新规律为:
其中,ηj(t)为第j个分布式电源在t时刻的有功功率输出控制策略修正量,与分别表示第i个与第j个分布式电源在t时刻的经信息网络数据篡改攻击后的有功功率输出控制策略调节量,c为常数。优选的,c的取值范围为c>0。
第i个分布式电源在t时刻有功功率输出控制策略为:
式中,ui(t)为控制策略。
本发明的孤岛微网分布式最优频率调控方法用于遭受信息网络数据篡改攻击下的孤岛微网环境。
本发明的孤岛微网分布式最优频率调控系统,包括动态更新模块和控制策略输出模块,动态更新模块用于标记第i个分布式电源在t时刻的有功功率输出控制策略调节量为ξi(t),根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,ξi(t)按更新规律动态更新;控制策略输出模块用于根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略。
有益效果:与现有技术相比,本发明具有如下显著优点:针对孤岛微网中的分布式电源,提供了一种抵御信息网络数据篡改攻击的孤岛微网分布式最优频率调控方法,依据所构建的有功功率输出控制策略调节量及有功功率输出控制策略修正量,实现了在信息网络篡改攻击下的孤岛微网频率稳定及处理经济性,保障孤岛微网经济稳定运行;依据变量更新规律及通信连接系数与冗余通信连接系数的设定方法可得,所构建抵御信息网络数据篡改攻击的孤岛微网最优频率调控方法基于分布式控制架构,具有动态性能好、构建成本低、鲁棒性及可扩展性好等诸多优点,特别适用于大量分布式电源接入环境下的孤岛微网环境;依据动态更新模块和控制策略输出模块之间的相互协调,保证了所构建孤岛微网分布式最优频率调控方法的有效执行。
附图说明
图1是孤岛微网分布式电源之间的通信拓扑图;
图2是各分布式电源的频率变化图;
图3是各分布式电源的有功功率输出变化图。
具体实施方式
下面结合实施例对本发明的技术方案作进一步说明。
本发明以一个由4个分布式电源所构成的孤岛微网系统为例,其通信拓扑关系如图1所示,具体实现步骤如下
1.系统参数设置:给定孤岛微网中所含分布式电源个数n=4,第i个分布式电源的成本因素E1=1.00、E2=0.75、E3=1.5、E4=0.5;
表1
表2
4.令第i(i=1,2,3,4)个分布式电源在t时刻的频率为ωi(t);
5.对于第i(i=1,2,3,4)个分布式电源,标记其在t时刻的有功功率输出控制策略调节量为ξi(t);标记其在t时刻的有功功率输出控制策略修正量为ηi(t);其分别按照如下的规律动态更新
6.在t时刻,第i(i=1,2,3,4)个分布式电源的有功功率输出控制策略为
为了验证本发明的有效性,进行了仿真实验,所示孤岛微网在t=10s时发生了信息网络数据篡改攻击,在t=20s时发生负荷变动。
图2表示孤岛微网中各分布式电源的频率变化,可以看出,即使遭受信息网络数据篡改攻击,本发明所提供的分布式最有频率调控方法依然能够在负荷变动的情形下使得各分布式电源的频率偏差趋于0,实现频率稳定的功能。图3表示孤岛微网总各分布式电源的有功功率输出变化,可以看出各分布式电源在本发明所提供的控制方法下遵循了整体出力成本最优的原则,实现了孤岛微网运行的经济型需求。
本发明的孤岛微网分布式最优频率调控系统,包括动态更新模块和控制策略输出模块,动态更新模块用于标记第i个分布式电源在t时刻的有功功率输出控制策略调节量为ξi(t),根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,ξi(t)按更新规律动态更新;控制策略输出模块用于根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略。
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
Claims (9)
1.一种孤岛微网分布式最优频率调控方法,其特征在于,包括如下步骤:
(1)根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,其中,ξi(t)为第i个分布式电源在t时刻的有功功率输出控制策略调节量,ξi(t)按更新规律动态更新;
(2)根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略;
所述有功功率输出控制策略调节量ξi(t)的更新规律为:
5.根据权利要求1所述的孤岛微网分布式最优频率调控方法,其特征在于:所述常数c的取值范围为c>0。
7.根据权利要求6所述的孤岛微网分布式最优频率调控方法,其特征在于:所述c的取值范围为c>0。
9.一种孤岛微网分布式最优频率调控系统,其特征在于:包括动态更新模块和控制策略输出模块,所述动态更新模块用于标记第i个分布式电源在t时刻的有功功率输出控制策略调节量为ξi(t),根据分布式电源个数n、成本因素Ei、通信连接系数冗余通信连接系数及频率ωi(t)构造ξi(t)的更新规律,ξi(t)按更新规律动态更新;所述控制策略输出模块用于根据有功功率输出控制策略调节量ξi(t)和成本因素Ei构造第i个分布式电源在t时刻有功功率输出控制策略;
所述有功功率输出控制策略调节量ξi(t)的更新规律为:
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