问题 问答题 简答题

什么是无功补偿的分层分区和就地平衡原则?目的是什么?

答案

参考答案:

无功补偿设备配置应贯彻执行分层分区和就地平衡的原则。所谓分层,是指主要承担有功功率传输的200~500kV电网,应尽量保持各电压层间的无功功率平衡,减少各电压层间的无功功率串动;所谓分区,是指110kV及以下的供电电网,应实现无功功率分区和就地平衡。

分层分区和就地平衡都是为了达到减少无功传输产生的大量功率损耗为目的。

单项选择题
阅读理解

阅读理解。

     For many people, the name Baskin-Robbins is linked to sweet memories of eating ice cream. Irvine

Robbins, who helped create this famous company, died in May at the age of ninety. His life's work of making

fun and exciting ice cream flavors changed the way Americans enjoy this food. Irvine Robbins opened his first

ice cream store in 1945 in California. At the time, there were no stores that sold only ice cream. His sister's

husband, Burton Baskin, also opened his own ice cream stores. In 1948 they combined their six stores into one

business. Baskin and Robbins realized that they were too busy to operate each store well. So, they decided to

sell part of each operation to the manager of that store. This permitted the company to grow quickly. By 1953,

they renamed their company Baskin-Robbins. They advertised that they sold 31 kinds of ice cream to show the

many choices buyers had. There was one flavor for every day of the month. Robbins and Baskin sold "Lunar

Cheesecake" the day after astronauts landed on the moon in 1969.Other flavors included "ChaChaCha", for

cherry chocolate chip, and Robbins' personal favorite "Jamoca Almond Fudge". They said:"We sell fun, not just

ice cream." By 1967, there were 500 Baskin-Robbins stores in the United States. The business partners sold

their company that year. Today, there are more than 5,800 Baskin-Robbins stores around the world.

1. What is the main idea of the passage?

A. The managers of Baskin-Robbins.

B. The start of Baskin-Robbins.

C. The production of Baskin Robbins.

D. The great success of Baskin-Robbins.

2. From the text we learn that _____. 

A. Baskin-Robbins was the only shop selling ice cream in 1945

B. Baskin-Robbins was famous for their special ice cream flavors

C. Baskin-Robbins grew quickly because they combined their other stores together

D. there had been more than 5,800 Baskin-Robbins stores around the world by 1967

3. What was probably the main reason for Baskin-Robbins' success?

A. They sold not only ice cream, but fun.

B. They renamed their company.

C. They put all their hearts into the business.

D. They sold "Lunar Cheesecake".

4. It can be inferred from the passage that _____.

A. Jamoca Almond Fudge is Baskins' favourite

B. Cherry chocolate chip sells best

C. Robbins and Baskin were good at inventing new ice creams

D. Lunar cheesecake was invented for the astronauts