Question

电力专业翻译：请将下面的三段话翻译成英文，谢谢

电力系统的根本任务就是尽可能经济而可靠地将电能供给各种规模的用户，现代社会更加希望电力能按需要连续供给。但是由于系统的随机故障，而这些故障通常又超出了系统工程人员的控制能力，因此毫不中断地连续供电实际上是不可能的。可靠性是决定系统性能好坏的标准之一，对作为典型大系统之一的电力系统来说，由于它具有生产与消费的同时性以及其他特点，对可靠性的要求非常高。
电力系统可靠性是对电力系统按可接受的质量标准和所需数量不间断地向电力用户供应电力和电能能力的度量。电力系统可靠性包括充裕度和安全性两个方面。确保电力系统无功功率平衡是保证系统安全、经济运行的一种有效手段，是提高电力系统电压质量的重要措施之一，因此无功功率的影响对电力系统可靠性的研究具有重要意义。在电网运行和规划中应该考虑无功功率对系统可靠性的影响。在实现考虑无功功率的电网可靠性评估的过程中，可以研究无功因素对可靠性计算的具体影响。
与有功功率相比，无功功率在电网运行中扮演着不同的角色，电力系统的无功功率是影响电压水平不稳定的最主要原因。无功功率不足将会降低电网的电压水平，影响电能质量，当系统不能满足负荷所需无功时，则可能会造成电压持续下降，最终导致电压崩溃。因此，研究无功功率对提高系统电压水平和电压质量，保证系统稳定运行具有重要意义。

Answer 1

The basic task of the power system is economically and reliably will power users supply scale, modern society more hope power can be continuously supplied according to the need as soon as possible. But due to the random failure of system, and these faults are often beyond the ability to control the system engineers, so without interruption of the continuous power supply is practically impossible. Reliability is a criterion to determine the system performance is good or bad, as one of the typical system of power system, because of its production and consumption at the same time, and other features, requirements on the reliability of very high.
The reliability of the power system is the power system with acceptable quality standards and the required number of uninterrupted electric power customer to supply electricity and electric energy measurement. The reliability of the power system including two aspects of adequacy and security. To ensure the safe operation of power system reactive power balance is ensure system security and economic operation of a kind of effective means, is to improve the voltage quality of power system is one of the most important measures, so there is no effect of reactive power on the power system reliability research has important significance. In the power grid planning and operation should be taken into account in the reactive power impact on system reliability. In the realization of the considered without power grid reliability evaluation process, study the factors of reliability calculation specific effects.
Compared with the active power, reactive power in power grid operation plays a different role, the reactive power in power system are the main reasons that affect the level of voltage instability of the. Reactive power shortage will reduce the voltage level of the power grid, the effect of electric to quality, when the system cannot meet the load reactive power may cause voltage continued to decline, eventually leading to voltage collapse. Therefore, the study on reactive power to improve the system voltage level and voltage quality, it has important meaning to ensure the stable operation of the system.