文章摘要
张波,张晓磊,贾焦心,等.基于惯量支撑和一次调频需求的VSG储能单元配置方法[J].电力系统自动化,2019,43(23):202-209. DOI: 10.7500/AEPS20190405002.
ZHANG Bo,ZHANG Xiaolei,JIA Jiaoxin, et al.Configuration Method for Energy Storage Unit of Virtual Synchronous Generator Based on Requirements of Inertia Support and Primary Frequency Regulation[J].Automation of Electric Power Systems,2019,43(23):202-209. DOI: 10.7500/AEPS20190405002.
基于惯量支撑和一次调频需求的VSG储能单元配置方法
Configuration Method for Energy Storage Unit of Virtual Synchronous Generator Based on Requirements of Inertia Support and Primary Frequency Regulation
DOI:10.7500/AEPS20190405002
关键词: 分布式发电  虚拟同步发电机  储能单元  容量配置  惯量支撑  一次调频
KeyWords: distributed generation  virtual synchronous generator(VSG)  energy storage unit  capacity configuration  inertia support  primary frequency regulation
上网日期:2019-10-15
基金项目:河北省自然科学基金资助项目(E2019502119);中央高校基本科研业务费专项资金资助项目(2018MS088);河北省高等学校科学技术研究项目(Z2017132)
作者单位E-mail
张波 河北省分布式储能与微网重点实验室(华北电力大学), 河北省保定市 071003 15733228986@163.com 
张晓磊 河北省分布式储能与微网重点实验室(华北电力大学), 河北省保定市 071003  
贾焦心 河北省分布式储能与微网重点实验室(华北电力大学), 河北省保定市 071003  
曾亚敏 河北省分布式储能与微网重点实验室(华北电力大学), 河北省保定市 071003  
颜湘武 河北省分布式储能与微网重点实验室(华北电力大学), 河北省保定市 071003  
摘要:
      分布式电源大量接入电网会引发电网惯量、阻尼缺失和系统稳定性下降问题,虚拟同步发电机(VSG)在分布式电源友好接入和提高电力系统稳定性等方面极具应用前景。作为虚拟惯量的物理基础,储能单元的配置直接影响着VSG的性能和成本。文中基于VSG的惯量支撑、一次调频两大基本功能,建立了响应电网频率波动的储能单元出力模型,提出了一种以元件参数和控制参数为基础的储能单元配置方法。然后,计及下垂系数、阻尼系数和惯性常数,研究了储能单元出力的暂态特性及其调节机制,并分析了储能单元功率、容量需求受控制参数影响的机理,明确了影响程度最大的控制参数。最后,借助仿真和实验证明了所提方法的正确性。
Abstract:
      Large amount of distributed generators(DGs)connected to power grid will cause loss of grid inertia and damping as well as decrease of system stability. The virtual synchronous generator(VSG)has great application prospects in the friendly access of DGs and the improvement of power system stability. As the physical basis of virtual inertia, the configuration of energy storage unit could directly affect the performance and cost of the VSG. Based on the two basic functions of the VSG(i. e. inertia support and primary frequency regulation), this paper develops an output model of the energy storage unit in response to the grid frequency fluctuation. And a configuration method of energy storage unit based on component parameters and control parameters is proposed. Considering the droop coefficient, damping coefficient and inertia constant, the transient characteristics of the output for energy storage unit and its adjustment mechanism are studied. Furthermore, the mechanism of the control parameters affecting the power and capacity requirements of the energy storage unit is analyzed, and the most influential control parameters are identified. Finally, the correctness of the proposed method is verified by simulations and experiments.
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