HarmonyOS 鸿蒙Next 调用power.shutdownDevice接口，提示permission check fail

HarmonyOS 鸿蒙Next 调用power.shutdownDevice接口，提示permission check fail 想实现一键关机。。。

api version 7 使用JS开发，调用JS接口power.shutdownDevice，点击按钮没反应。。。

提示：

02-22 12:51:30.503 5945-4217/com.example.myapplication E 02900/PowerMgrClient: [power_mgr_client.cpp] ShutDownDevice# ShutDownDevice called.

02-22 12:51:30.504 22460-26974/? E 02901/PowerMgrService: [power_mgr_service.cpp] ShutDownDevice# ShutDownDevice Request failed, 5945 permission check fail

这是index.js的代码，前端通过一个按钮事件调用

import power from '@ohos.power';
export default {
    data: {
        title: ""
    },
    onInit() {
        this.title = this.$t('strings.world');
    },
    shutdown(){
        power.shutdownDevice("shutdown_test");
        //power.rebootDevice("tets");
        console.info('power_shutdown_device_test success')
    }
}

这是config.json权限申请代码：

{
  "app": {
    "bundleName": "com.example.myapplication",
    "vendor": "example",
    "version": {
      "code": 1000000,
      "name": "1.0.0"
    }
  },
  "deviceConfig": {},
  "module": {
    "package": "com.example.myapplication",
    "name": ".MyApplication",
    "mainAbility": "com.example.myapplication.MainAbility",
    "deviceType": [
      "phone"
    ],
    "distro": {
      "deliveryWithInstall": true,
      "moduleName": "entry",
      "moduleType": "entry",
      "installationFree": false
    },
    "abilities": [
      {
        "skills": [
          {
            "entities": [
              "entity.system.home"
            ],
            "actions": [
              "action.system.home"
            ]
          }
        ],
        "visible": true,
        "name": "com.example.myapplication.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "$string:entry_MainAbility",
        "type": "page",
        "launchType": "standard"
      }
    ],
    "js": [
      {
        "pages": [
          "pages/index/index"
        ],
        "name": "default",
        "window": {
          "designWidth": 720,
          "autoDesignWidth": true
        }
      }
    ],
    "reqPermissions": [
      {
        "name": "ohos.permission.SHUTDOWN",
        "reason": "shutdown_test",
        "usedScene": {
          "ability": [
            "com.example.myapplication.MainAbility"
          ],
          "when": "always"
        }
      }
    ]
  }
}