Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application...Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application environment and topological structure and operating principles of hybrid circuit breakers, and key stress parameters in transient state process of two time dimensions are extracted. The established digital simulation circuit for PSCAD/EMTDC device-level operation of the circuit breaker has verified the stress properties of millisecond level breaking process and microsecond level commutation process. Then, equivalent test method, circuits and parameters based on LC power supply are proposed on the basis of stress extraction. Finally, the results of implemented breaking tests for complete 200 kV circuit breaker, 100 kV and 50 kV circuit breaker units, as well as single power electronic module have verified the accuracy of the simulation circuit and mathematical analysis. The result of this paper can be a guide to electrical structure and test system design of hybrid HVDC circuit breaker.展开更多
DCS系统(Distributed Control System)作为热工控制系统的核心部分,其性能指标对发电机组安全稳定运行有着至关重要的影响。DCS系统在长期运行中常存在如卡件故障、信号干扰等问题,需依据行业技术标准,通过科学的测试手段,对其主要安全...DCS系统(Distributed Control System)作为热工控制系统的核心部分,其性能指标对发电机组安全稳定运行有着至关重要的影响。DCS系统在长期运行中常存在如卡件故障、信号干扰等问题,需依据行业技术标准,通过科学的测试手段,对其主要安全性指标如网络性能、控制器性能、响应时间、控制器冗余监测、控制器切换、抗干扰能力等进行测试,可有效判断出DCS长周期运行过程中存在的安全隐患,并进行针对性运行维护,以提升其安全可靠性。展开更多
基金supported by SGCC Scientific and Technological Project(52110116004W)
文摘Firstly, relevant stress properties of millisecond level breaking process and microsecond level commutation process of hybrid HVDC circuit breaker are studied in detail on the basis of the analysis for the application environment and topological structure and operating principles of hybrid circuit breakers, and key stress parameters in transient state process of two time dimensions are extracted. The established digital simulation circuit for PSCAD/EMTDC device-level operation of the circuit breaker has verified the stress properties of millisecond level breaking process and microsecond level commutation process. Then, equivalent test method, circuits and parameters based on LC power supply are proposed on the basis of stress extraction. Finally, the results of implemented breaking tests for complete 200 kV circuit breaker, 100 kV and 50 kV circuit breaker units, as well as single power electronic module have verified the accuracy of the simulation circuit and mathematical analysis. The result of this paper can be a guide to electrical structure and test system design of hybrid HVDC circuit breaker.
文摘DCS系统(Distributed Control System)作为热工控制系统的核心部分,其性能指标对发电机组安全稳定运行有着至关重要的影响。DCS系统在长期运行中常存在如卡件故障、信号干扰等问题,需依据行业技术标准,通过科学的测试手段,对其主要安全性指标如网络性能、控制器性能、响应时间、控制器冗余监测、控制器切换、抗干扰能力等进行测试,可有效判断出DCS长周期运行过程中存在的安全隐患,并进行针对性运行维护,以提升其安全可靠性。
