Fault line selection in cooperation with multi-mode grounding control for the floating nuclear power plant grid
| Autor: | Lin Jiang, Yikai Wang, Wen Xu, Xianggen Yin, Xin Yin, Minghao Wen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Energy Engineering and Power Technology Fault (geology) Floating nuclear power plant Phase difference Multi-mode grounding control lcsh:TK3001-3521 law.invention Wavelet law Control theory lcsh:TK1001-1841 Nuclear power plant Electrical and Electronic Engineering Safety Risk Reliability and Quality MATLAB computer.programming_language geography lcsh:Distribution or transmission of electric power geography.geographical_feature_category Ground Maximum united energy entropy ratio (MUEER) Wavelet transform Grid lcsh:Production of electric energy or power. Powerplants. Central stations Wavelet transform modulus maxima (WTMM) Electricity generation computer Single phase-ground fault |
| Zdroj: | Protection and Control of Modern Power Systems, Vol 5, Iss 1, Pp 1-10 (2020) Protection and Control of Modern Power Systems |
| ISSN: | 2367-0983 2367-2617 |
| DOI: | 10.1186/s41601-020-00160-0 |
| Popis: | The Floating nuclear power plant grid is composed of power generation, in-station power supply and external power delivery. To ensure the safety of the nuclear island, the in-station system adopts a special power supply mode, while the external power supply needs to be adapted to different types of external systems. Because of frequent single phase-ground faults and various fault forms, the fault line selection protection should be accurate, sensitive and adaptive. This paper presents a fault line selection method in cooperation with multi-mode grounding control. Based on the maximum united energy entropy ratio (MUEER), the optimal wavelet basis function and decomposition scale are adaptively chosen, while the fault line is selected by wavelet transform modulus maxima (WTMM). For high-impedance faults (HIFs), to enlarge the fault feature, the system grounding mode can be switched by the multi-mode grounding control. Based on the characteristic of HIFs, the fault line can be selected by comparing phase differences of zero-sequence current mutation and fault phase voltage mutation before and after the fault. Simulation results using MATLAB/Simulink show the effectiveness of the proposed method in solving the protection problems. |
| Databáze: | OpenAIRE |
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