电力弹簧稳态运行范围及越限失灵机理分析

Analysis on Steady-state Operating Range and Off-limits Malfunction Mechanism of Electrical Spring

在介绍电力弹簧的研究背景和基本原理的基础上,通过相量图法对电力弹簧稳态调节能力进行详细分析,得到电力弹簧稳态运行范围,同时分析电力弹簧越限失灵的机理,给出了网侧电压越限条件下的关键负载电压设定值优化计算方法。若网侧电压在稳态运行范围内波动,经电力弹簧调节,可使关键负载电压幅值稳定到标准值;若超出稳态运行范围,即发生越限,则受电力弹簧调节能力限制,关键负载电压稳定值会发生偏离,甚至会发生电力弹簧失灵情况。通过优化网侧电压越限情况下的关键负载电压设定值计算方法,考虑关键负载电压允许小范围波动,可以保证电力弹簧在网侧电压越限情况下依旧正常工作,从而扩大电力弹簧稳定运行范围。最后,通过仿真实验对分析结果进行了验证。

With the background and basic principle of the electrical spring（ES）described,the modulability of ES is analyzed at length by the vector diagram method,and the operation range of the line voltage under which ES can work is investigated.Besides,the malfunction mechanism is analyzed,and a new computational method for optimizing the specified value of critical load voltage is found.When the line voltage changes in the range,the critical load voltage can be stabilized on the standard value by ES,but when changes are beyond the range,the ES will break down,and the critical load voltage will deviate from the standard state,or even the system can become unstable.Given the permissible fluctuation range of the critical load voltage,the expanded safety regulation domain of the ES system can be obtained by optimizing the specified value of the critical load voltage.Finally,the analysis results are validated by simulation and experiment results.