计及非关键负载接入量的电力弹簧配置方法

在"颠簸"的电网中,电力弹簧(ES)将电压的波动转移到非关键负载上,可实现用电量跟随发电量变化,有效缓解新能源发电的不稳定性带来的问题。但大量地投入非关键负载以追求ES稳压效果,势必会给电网带来新的安全隐患,目前在ES应用配置方面的研究还较少。文中首先阐述了ES的基本原理,分析了其在区域电网中对母线电压的调节机理,然后建立了ES应用配置数学模型,揭示了非关键负载接入量与ES发出无功的定量关系,并提出一种非关键负载接入量最小的ES配置方法。算例结果表明,通过该方法得到非关键负载最小占比,形成经济合理的配置方案,验证了配置方法的正确性和有效性。

A configuration method of electric spring considering non-critical load access

In a power grid with fluctuating voltage, the electric spring transfers it to the non-critical load in the target of guaranteeing that the electricity consumption varies with the power generation, thus alleviating the tricky problem rising from an unstable new energy generation effectively.However, it is bound to bring about new security risks to the power grid if a lot of non-critical load is applied for enhancing the voltage regulation of the electric spring.At present, there are few studies on the application configuration of electric spring.This paper first explains the basic principles of electric spring and the corresponding adjustment of the line voltage in a regional power grid.Secondly, a mathematical model of application configuration for electric spring is proposed.The model illustrates the quantitative relationship between the input of non-critical load and the reactive power from the electric spring.In addition, a configuration method of electric spring as to the minimum input of non-critical load is also proposed.Finally, the study results show that the minimum-proportion of non-critical load is obtained by this method and it forms an economical and rational configuration, the correctness and effectiveness of the configuration method is verified simultaneously.