A method and device for on-line monitoring of forced oscillation source in power system
A forced oscillation and power system technology, applied in the field of online monitoring of forced oscillation sources, can solve problems such as low reliability, complex analysis, and imprecise theoretical basis, so as to achieve simple and effective schemes, reduce complexity, avoid analysis errors and be reliable sex-reducing effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment 1
[0072] A power plant 3# generator power oscillation occurred. Figure 6 ~ Figure 9 The curves of unit active power, regulation stage pressure, main excitation current and unit frequency are given respectively.
[0073] Through frequency spectrum analysis of the active power and frequency data of 9 steady-state oscillation cycles from 8:32:00 to 8:32:05:595, the oscillation frequency is 1.512Hz. Other analysis results are shown in Table 1.
[0074] Table 1 Frequency, electrical power, excitation current, regulator stage pressure oscillation phasor analysis results
[0075]
[0076] The inertial time constant of the unit is T J =2H=5.349s. The rated capacity of the unit is S aB =200 / 0.85=253.3MVA, rated frequency f B = 50Hz. Can be calculated as:
[0077]The per unit value of the speed fluctuation is: Δω=Δf=0.0503 / 50=0.001006
[0078] The per unit value of power fluctuation is: ΔP e = 41.4648 / 253.3 = 0.1762
[0079] The calculation result of the fluctuating phasor o...
specific Embodiment 2
[0086] In this specific embodiment, the actual measurement data of the 1# machine (non-excitation current monitoring) of the B power plant is analyzed when responding to the grid oscillation.
[0087] Figure 11 and Figure 12 The curves of unit active power and unit frequency are given respectively.
[0088] By analyzing the data of 9 oscillation cycles from 21:02:00 to 21:02:15:640, the oscillation frequency is 0.575Hz. Other analysis results are shown in Table 2.
[0089] Table 2 Frequency and electrical power oscillation phasor analysis results
[0090]
[0091] The inertial time constant of the unit is T J =2H=7.427s. The rated capacity of the unit is S aB =600 / 0.9=666.7MVA, rated frequency f B = 50Hz. Can be calculated as:
[0092] The per unit value of the speed fluctuation is: Δω=Δf=0.0831 / 50=0.001662
[0093] The per unit value of power fluctuation is: ΔP e = 35.8551 / 666.7 = 0.0538
[0094] The calculation result of the fluctuating phasor of the mechani...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com