要使用Angular和OIDC的隐式流进行静默续约，可以按照以下步骤进行操作：

1. 安装必要的依赖项：

   npm install angular-auth-oidc-client
   

2. 在Angular应用的根模块中导入OIDC模块：

   import { AuthModule, OidcSecurityService, OpenIDImplicitFlowConfiguration } from 'angular-auth-oidc-client';
   
   @NgModule({
     imports: [
       AuthModule.forRoot(),
       // 其他模块
     ],
     // 其他配置
   })
   export class AppModule {
     constructor(private oidcSecurityService: OidcSecurityService) {
       const openIDImplicitFlowConfiguration = new OpenIDImplicitFlowConfiguration();
       openIDImplicitFlowConfiguration.stsServer = 'https://your-sts-server-url';
       openIDImplicitFlowConfiguration.redirect_url = 'https://your-app-url';
       openIDImplicitFlowConfiguration.client_id = 'your-client-id';
       openIDImplicitFlowConfiguration.response_type = 'id_token token';
       openIDImplicitFlowConfiguration.scope = 'openid profile';
       openIDImplicitFlowConfiguration.silent_renew = true;
       openIDImplicitFlowConfiguration.start_checksession = true;
       openIDImplicitFlowConfiguration.post_logout_redirect_uri = 'https://your-app-url';
       openIDImplicitFlowConfiguration.startup_route = '/';
       openIDImplicitFlowConfiguration.forbidden_route = '/forbidden';
       openIDImplicitFlowConfiguration.unauthorized_route = '/unauthorized';
       openIDImplicitFlowConfiguration.log_console_warning_active = true;
       openIDImplicitFlowConfiguration.log_console_debug_active = true;
       openIDImplicitFlowConfiguration.max_id_token_iat_offset_allowed_in_seconds = 10;
   
       this.oidcSecurityService.setupModule(openIDImplicitFlowConfiguration);
     }
   }
   

3. 在需要进行静默续约的组件中，可以注入OidcSecurityService并调用相应的方法。例如，在某个路由守卫中：

   import { Injectable } from '@angular/core';
   import { CanActivate, Router } from '@angular/router';
   import { OidcSecurityService } from 'angular-auth-oidc-client';
   
   @Injectable()
   export class AuthGuard implements CanActivate {
     constructor(private oidcSecurityService: OidcSecurityService, private router: Router) {}
   
     canActivate(): boolean {
       if (this.oidcSecurityService.isAuthenticated()) {
         return true;
       } else {
         this.oidcSecurityService.authorize();
         return false;
       }
     }
   }
   

4. 配置OIDC服务器以支持静默续约。具体的配置可能因OIDC提供者而异，请参考相关文档。

请注意，以上仅是一个示例解决方法，实际情况可能会因应用和OIDC提供者的不同而有所差异。建议参考相关文档和库的文档以获取更详细的指导。