UNITROL5000励磁系统低励限制优化整定方法研究
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国家电网有限公司科技项目(521001160005)


Optimized Setting Method Research of UNITROL5000 Excitation System Low Excitation Limit
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    摘要:

    发电机进相运行时,出现UNITROL5000励磁系统低励限制的动作值与整定值不一致的情况,导致机组无法发挥其进相能力,造成运行电压过高,不利于电网安全运行。文中分析两种类型励磁系统低励限制动作特性及影响因素,根据动作特性提出优化的整定方法,并通过实例验证该整定方法的可行性。该整定方法综合考虑机组的进相能力及失磁保护情况,整定定值后机组低励限制动作值接近机组进相能力曲线,并与失磁保护配合合理,为工程实际中UNITROL5000励磁系统低励限制定值整定提供了参考。

    Abstract:

    It is different between the action value and the setting value of UNITROL5000 excitation system low excitation limit during generator's leading phase operation,and which leads to that the unit can't play its leading phase ability,and the line voltage operates much higher,it is not conducive to the safe operation of the power grid.This paper analyzes the low excitation limit action characteristics and influence factors of two different types of excitation system.Then an optimized setting method of low excitation limit is proposed.Finally,the feasibility of the tuning method is verified by an example.The low excitation limit setting method considers the generator's leading phase ability and the excitation-loss protection,the action value is as close as possible to the generator's leading phase ability and matches the excitation-loss protection reasonably after setting the optimized value of low excitation limit.The low excitation limit setting method provides a reference in the engineering practice for UNITROL5000 excitation system.

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解兵,徐珂,罗凯明,刘建坤,周前. UNITROL5000励磁系统低励限制优化整定方法研究[J].电力工程技术,2018,37(4):149-154

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  • 收稿日期:2018-03-23
  • 最后修改日期:2018-05-07
  • 录用日期:2018-04-02
  • 在线发布日期: 2018-07-26
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