在中小型电力行业系统中，曲线的要求比较严格，虽然网络上面各种曲线控件非常多，但是很多只能提供一段时间的曲线显示或者历史若干个点的显示-The power industry in the small and medium-sized systems, more stringent requirements of curve, although a variety of curves above the control network is very large, but many can only