摘要
风力发电、太阳能光伏发电以及储能的技术特性、容量配置及控制策略对联合发电系统总有功功率特性有重要影响。分析了风光储联合发电系统的结构特点、数学模型和技术特点,提出了一种储能单元充放电优化模型,该模型以有功功率波动最小为目标函数,其约束条件考虑了每个步长的储能初始容量和储能充放电控制策略。根据该模型,提出了衡量风光储联合发电系统有功功率波动的3个指标,并结合评价风光储联合系统供电可靠性指标,综合评价总输出功率特性,通过Matlab编程进行了实例验算,分析了有功功率特性随储能容量配置方案的变化趋势及各指标的意义。
The common characteristic of solar energy and wind power are the low energy density and strong randomness. As a new form of power generation unit, which complements the characteristics of wind power generation system with that of photovoltaic generation system and energy storage device, Hybrid photovoltaic/wind power generation system with storage bank （HPWS） can decrease active power fluctuation and improve power quality as well as mitigate the influence of active power fluctuation due to intermittent power generation of wind farms and solar PV generation sytems, thus the technica characteristics, capacity configuration and control strategy of wind power generation, solar PV generation and energy storage euqipments greatly impact the overall active power characteristics of HPWS system. On the basis of analyzing structural features, methematical model and technical features of HPWS system, an optimized charging/discharging model of energy storage unit is proposed, in which the mnimum fluctuation of active power is taken as objective function and in the constraints the initial capacity of energy storage at each step and charging/discharging control storage are taken into account. Based on the proposed model, three inices, by which the active power fluctuation is checked, are put forward, and combining with other two indices that evaluate the power supply reliability of HPWS system the characteristics of overall output active power of HPWS system is comprehensively evaluated. The checking computation of actual example is verified by the simulation software programmed by Matlab, and the varying trend of active power characteristics with the scheme of energy storage capacity configuration is analyzed.
出处
《电网技术》
EI
CSCD
北大核心
2011年第4期123-128,共6页
Power System Technology
关键词
风力发电
太阳能光伏发电
储能技术
容量配置
有功功率特性
有功功率波动指标
wind power energy storage technology
power characteristics
indices generation
solar PV generation
capacity configuration
active of fluctuation of active power
