Under the government target on carbon peaking and carbon neutrality,the establishment of a modern power system is an inevitable trend for renewable energy source(RES)-dominated generation to achieve low-carbon transition.However,with the large-scale RES integration,power systems are gradually developing towards the characteristics of high proportions of both RESs and power electronic converters,posing great challenges to the frequency stability of fu-ture power systems.Therefore,we provided a comprehensive and systematic investigation and outlook of modem power system inertia-frequency sensing and control technology across following three dimensions:frequency regulation re-source optimization-"Cloud",inertia sensing and warning visualization-"Grid",and RES inertia emulation-"Terminal".Firstly,the necessity and technical framework of exploring system secure control and operation are described.Then,cur-rent progresses in frequency regulation resource optimization based on near real-time frequency dynamics prediction are analyzed,developments of system inertia sensing and warning visualization based on phase measurement units are dis-cussed,and the key technologies of RES grid-forming inertia emulation control based on supercapacitor stored power are elaborated in detail.Finally,the prospects in system inertia-frequency technologies across"Cloud-Grid-Terminal"are presented.
关键词
电力系统稳定/电力系统控制/电力系统运行/频率动态优化/惯量感知预警/新能源惯量模拟/构网控制
Key words
power system stability/power system control/power system operation/frequency dynamics optimization/inertia sensing and warning/renewable energy inertia emulation/grid-forming control
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