摘要
电力系统的电压水平是供电质量的重要考核指标,而系统的电压水平受无功潮流分布影响较大。首先通过公式推导分析了发电机电压、变压器变比、母线负荷、无功补偿对系统电压的影响;其次以最小网损为目标函数,将电压水平作为约束条件,建立了电力系统电压无功控制的数学模型,并引入万有引力搜索算法用于求解该模型;最后,以IEEE-14节点系统为例,分正常运行方式、负荷较重情况、机组发生故障3种工况进行了算例分析,结果表明文章提出的方法行之有效,可以为优化系统潮流分布,提高系统供电电压质量提供支持。
The voltage level of power system is an important index to assess the quality of power supply,and is greatly influenced by the distribution of reactive power flow. Firstly,the influence of generator voltage,transformer voltage ratio,bus load and reactive power compensation on system voltage was analyzed through formula deduction. Secondly,the mathematical model of voltage / reactive power control of power system was constructed with the objective function of minimum power loss and voltage level constraint,and gravitational search algorithm was introduced to solve the model. Finally,taking IEEE-14 bus system as an example,the normal operation mode,heavy load mode and generator failure mode were analyzed,and test results showed that GSA was effective. The research achievements can provide supports for the optimization of power flow distribution and improve the quality of power supply.
出处
《华北电力技术》
CAS
2016年第5期16-21,共6页
North China Electric Power
关键词
万有引力搜索算法
电压无功控制
无功优化
控制策略
gravitational search algorithm
voltage / reactive power control
reactive power optimization
voltage control strategy
