High penetration rates of renewable energy will bring stability problems for the future power grid.One of the critical issues is lack of inertia.In this paper,a synchronous motor-generator pair(MGP)system is proposed ...High penetration rates of renewable energy will bring stability problems for the future power grid.One of the critical issues is lack of inertia.In this paper,a synchronous motor-generator pair(MGP)system is proposed as a possible solution for renewable energy integration to enhance inertia and improve grid stability.First,feasibility studies of MGP on inertia,damping,efficiency,and cost are presented.Second,an analytical model is established based on its rotor angle relation.An active power control scheme based on voltage phase difference between renewable energy source and grid is then proposed,and state equations of MGP are derived for small signal stability.Next,two experiments are designed and implemented to verify stable operation and active power regulation of the MGP system.A single-machine infinite bus system is tested to investigate small signal stability and frequency response of MGP.The results show that the MGP system has a solid base in physics and is a feasible solution for providing enough inertia and improving small signal performance in the power grid with high penetration of renewable energy.The paper concludes with a discussion on future research directions to gain a better understanding of MGP.展开更多
根据含高渗透率间歇性电源电网的特点,提出了一种该类型电网规划方案的优选方法。构建了包含电压稳定、频率稳定、充裕性、安全稳定性、间歇性电源接入容量和经济性等指标的评价指标体系。基于决策实行与评价实验室(decision making tra...根据含高渗透率间歇性电源电网的特点,提出了一种该类型电网规划方案的优选方法。构建了包含电压稳定、频率稳定、充裕性、安全稳定性、间歇性电源接入容量和经济性等指标的评价指标体系。基于决策实行与评价实验室(decision making trail and evaluation laboratory,DEMANTEL)法对传统网络分析法(analytic network process,ANP)进行改进,并采用改进的网络分析法获取指标间相对权重。同时基于绝对正负理想点理论和投影型贴近度方法对传统逼近理想点(technique for order preference by similarity to idealsolution,TOPSIS)法进行改进,在得到指标权重的基础上利用改进TOPSIS法生成各规划方案的整体排序,从而选出最优方案,最后给出算例证明了所提方法的有效性。展开更多
基金supported in part by the National Key Research and Development Program of China(2016YFB0101900).
文摘High penetration rates of renewable energy will bring stability problems for the future power grid.One of the critical issues is lack of inertia.In this paper,a synchronous motor-generator pair(MGP)system is proposed as a possible solution for renewable energy integration to enhance inertia and improve grid stability.First,feasibility studies of MGP on inertia,damping,efficiency,and cost are presented.Second,an analytical model is established based on its rotor angle relation.An active power control scheme based on voltage phase difference between renewable energy source and grid is then proposed,and state equations of MGP are derived for small signal stability.Next,two experiments are designed and implemented to verify stable operation and active power regulation of the MGP system.A single-machine infinite bus system is tested to investigate small signal stability and frequency response of MGP.The results show that the MGP system has a solid base in physics and is a feasible solution for providing enough inertia and improving small signal performance in the power grid with high penetration of renewable energy.The paper concludes with a discussion on future research directions to gain a better understanding of MGP.
文摘根据含高渗透率间歇性电源电网的特点,提出了一种该类型电网规划方案的优选方法。构建了包含电压稳定、频率稳定、充裕性、安全稳定性、间歇性电源接入容量和经济性等指标的评价指标体系。基于决策实行与评价实验室(decision making trail and evaluation laboratory,DEMANTEL)法对传统网络分析法(analytic network process,ANP)进行改进,并采用改进的网络分析法获取指标间相对权重。同时基于绝对正负理想点理论和投影型贴近度方法对传统逼近理想点(technique for order preference by similarity to idealsolution,TOPSIS)法进行改进,在得到指标权重的基础上利用改进TOPSIS法生成各规划方案的整体排序,从而选出最优方案,最后给出算例证明了所提方法的有效性。
