要加载xrange系列，您需要加载xrange模块。

import Xrange from 'highcharts/modules/xrange';
Xrange(Highcharts);

partialFill对象不正确，您可以在API文档data.partialFill.amount中看到它们的外观。

data: [{
    x: Date.UTC(2014, 10, 21),
    x2: Date.UTC(2014, 11, 2),
    y: 0,
    partialFill: {
      amount: 0.5
    }
  }, {
    x: Date.UTC(2014, 11, 2),
    x2: Date.UTC(2014, 11, 5),
    y: 1
  }, {
    x: Date.UTC(2014, 11, 8),
    x2: Date.UTC(2014, 11, 9),
    y: 2
  }, {
    x: Date.UTC(2014, 11, 9),
    x2: Date.UTC(2014, 11, 19),
    y: 1
  }, {
    x: Date.UTC(2014, 11, 10),
    x2: Date.UTC(2014, 11, 23),
    y: 2
  }],

演示：https://stackblitz.com/edit/highcharts-angular-basic-line-7km3p6?file=src%2Fapp%2Fapp.component.ts
应用编程接口：https://api.highcharts.com/highcharts/series.xrange.data.partialFill