基于多代理的多馈入直流输电换相失败协调预防研究

Method of coordinated prevention of commutation failure based on multi-agent in MIDC

换相失败是换流站常见的故障之一,换流站间的交互作用使多馈入直流输电系统的换相失败更为复杂,故障严重时会引发并发换相失败。换相失败预防控制器检测交流系统发生故障时立刻提前触发,增大换相裕度,避免换相失败。针对多馈入直流输电系统的交互作用,引入多代理系统,提出了基于多代理的多馈入直流输电换相失败协调预防方法,并在PSCAD中搭建了多代理换相失败协调预防模块,将其用于三馈入直流输电系统进行仿真验证,结果表明,多代理换相失败协调预防方法对本地和并发换相失败都可进行有效地预防。

Commutation failure is one of the common faults of the converter station in high-voltage direct current transmission system. Commutation failure is much more complicated because of the interaction between the converter stations in multi-infeed HVDC systems,in which concurrent commutation failure can occur with a serious fault.The function of commutation failure prevention controller is to increase the commutation margin immediately to avoid commutation failure by decreasing firing angle when the faults of the AC system are detected,while the impact and importance of interactions are ignored. For multi-infeed HVDC system interactions,the method of commutation failure coordinated prevention based on the multi-agent system is proposed. In this paper,the multi-agency prevention module is built and applied to the three infeed HVDC systems in PSCAD. The simulation results of the three infeed HVDC systems show that the multi-agency coordination prevention method can be effective in preventing local and concurrent commutation failure.