摘要
针对自治微电网中频率与有功需求没有直接联系的情况,结合不同微电源的特点,给出了以本地节点电压作为调节目标实现有功(无功)平衡的分布式控制策略。有功可控的主动式电源以其有功输出来调节节点电压,实现了电压水平在长时间尺度下的稳定;电压源模式的储能式电源维持其节点电压幅度和相位稳定,保证电压水平的短期稳定和无功平衡;工作在有功调压模式的储能式电源以其有功输出来维持其节点电压水平的短期稳定;清洁能源有功输出跟随外部有功输入。利用储能式电源电压设定与其储能水平的反比关系,实现储能式电源充放电的分布式控制。给出了基于上述控制策略的单元控制方法,并以仿真验证了控制策略和单元控制的有效性。
As the frequency is not directly associated with the active power in autonomous micro grid,a distributed control strategy based on nodal voltage regulation is proposed to balance its active and reactive powers. The controllable active sources regulate the nodal Voltage through its output of active power to maintain the long term voltage level. The storage source working in voltage regulation pattern maintains the short term voltage level by injecting active power into grid,while the storage source working in voltage source pattern keeps the magnitude and phase of nodal voltage stable and the reactive power balanced. The clean sources output all the energy absorbed. The voltage set point of storage source is inversely proportional to its energy storage level ,which is used to realize the distributed eontrol of its charge and discharge. The effectiveness of unit control based on proposed strategy is verified hv simulation.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第1期20-24,31,共6页
Electric Power Automation Equipment
基金
国家自然科学基金重点项目(60534040)
国家863计划资助项目(2007AA05Z244)~~
关键词
自治微电网
分布式控制
清洁能源
储能式电源
电压调节
解耦控制
autonomous microgrid
distributed control
clean energy source
storage source
voltageregulation
decoupled control
