高压直流工程中交直流系统协调控制接口方式

Coordinated-Control Interface Modes for Interconnected AC/DC Power Systems in HVDC Projects

为了确定当前高压直流工程中交直流系统协调控制较优的接口方式,介绍了稳控设备与直流极控系统的两种接口方式——电接口方式和光纤接口方式,分析了这两种方式的优缺点。指出虽然电接口方式简单易实现,被多数国内已投运的直流工程所采用,但它只能采用档位粗调的调制策略,在灵活性、快速性和可靠性方面有一定缺陷。分析显示,光纤接口方式可以解决上述问题,因此,在后建的直流工程中必然会得到更多的应用。

Two kinds of coordinated-control interface mode,the electrical connection mode and fiber connection mode,for interconnected AC/DC power systems in HVDC projects are introduced in this paper,and their advantages and disadvantages are analyzed too.It is pointed out that the electrical connection mode is now adopted by most of the operating HVDC projects in China as it is simple and easy to implement,but there is shortcoming in its operation as it takes so rough adjustable modulation strategy with gears that it has certain defects in flexibility,rapidity and reliability.The analysis in this paper shows that the fiber connection mode can overcome the shortcoming of the former,and thus will be adopted in the being constructed HVDC projects more widely.