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BS EN 50388-2:2025 Fixed installations and rolling stock for railway applications. Technical criteria for the coordination between electric traction power supply systems and rolling stock to achieve interoperability - Stability and harmonics >
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BS EN 50388-2:2025 Fixed installations and rolling stock for railway applications. Technical criteria for the coordination between electric traction power supply systems and rolling stock to achieve interoperability - Stability and harmonics, 2025
- undefined
- European foreword
- Introduction
- Table 1 — Structure of this document
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, abbreviations and symbols [Go to Page]
- Figure 1 — Traction unit and influencing unit [Go to Page]
- 4 Requirements [Go to Page]
- Table 2 — limit frequency for resonance stability
- Figure 2 — Example of a frequency response of input admittance of a traction unit and forbidden zones of phase angle
- Table 3 — Limits for CL [Go to Page]
- Figure 3 — Qualitative illustration of degree of stability (illustrated by DC or AC RMS quantities)
- Figure 4 — Simplified combined system with scaling of number of traction units to fulfil least requirement on total installed maximum power at wheel.
- Table 4 — Parameters for low-frequency stability scenarios with pulsing traction unit line converters [Go to Page]
- Table 5 — Values for UmaxH
- Table 6 — Definition of N number of influencing units (IU) for the calculation cases
- Figure 5 — Illustration of how the calculation of kz(f0) is done
- Table 7 — Values for kN if random displacement of the switching angles between different IUs is applied [Go to Page]
- Table 8 — Limits for the peak voltage monitor [Go to Page]
- Table 9 — use of diode rectification [Go to Page]
- Table 10 — Value for UmaxH [Go to Page]
- 5 Tests and documentation [Go to Page]
- Table 11 — Methods for demonstration of compliance [Go to Page]
- Figure 6 — Schematic diagram for measurements of input admittance
- Table 12 — Frequency resolution of the test signal for 16,7 Hz networks
- Table 13 — Frequency resolution of the test signal for 50 Hz networks
- Figure 7 — Voltage source configurations [Go to Page]
- Table 14 — Specific line capacitance cLine values
- Table 15 — No-load supply voltage levels [Go to Page]
- Annex A (informative) Technical background
- A.1 Electrical resonance stability
- A.1.1 Background
- Figure A.1 — Simplified system block diagram (vehicle and infrastructure)
- A.1.2 Stability analysis for networks
- A.1.3 Experiences from and hints for measurements
- A.2 Low-frequency stability
- A.2.1 Background and experiences
- A.2.2 Acceptance criteria and verification
- Figure A.2 — Example for relevant curves for documentation
- A.2.3 Information on possible future scenarios
- Table A.1 — Possible future parameters for low-frequency stability scenarios with pulsing traction unit line converters
- A.3 Overvoltages caused by harmonics
- A.3.1 Power supply resonances
- Figure A.3 — Reference impedance
- A.3.2 Bandwidth and time constants
- A.3.3 Examples for rolling stock
- Figure A.4 — Evaluation for a hypothetical locomotive
- A.4 Depot cases
- A.4.1 General
- A.4.2 Resonance stability
- Figure A.5 — Model of system capacitance
- A.4.3 Overvoltages caused by harmonics
- Figure A.6 — Typical spectra for pulsed line converters (left) and diode rectification (right)
- Figure A.7 — Relative losses in substation transformers for diode rectification
- Annex B (informative) Examples from experienced phenomena (measurements)
- B.1 Electrical resonance stability
- Figure B.1 — Line voltage with electrical resonance instability
- B.2 Low-frequency stability
- Figure B.2 — Example of line voltage (upper) and line current (lower) (instantaneous values)
- Figure B.3 — Example of line voltage (upper) and line current (lower) (RMS values)
- B.3 Overvoltages caused by harmonics
- Figure B.4 — Examples of line voltage with thyristor rectification
- Figure B.5 — Example of line voltage with PWM converter
- Annex C (informative) Data related to the compatibility study of harmonics and dynamic effects
- C.1 Characterization of the traction power supply fixed installations
- Table C.1 — Characterization of AC electrified lines
- Table C.2 — Characterization of DC electrified lines
- C.2 Specific parameters of overhead contact lines
- C.2.1 General
- C.2.2 Conventional systems
- C.2.2.1 Specific capacitance
- Table C.3 — Specific capacitance values of conventional systems
- C.2.2.2 Specific resistance and inductance
- Figure C.1 — Typical values for specific resistance and inductance of a single-track line
- Figure C.2 — Typical values for specific resistance and inductance of a double-track line
- Table C.4 — Typical values for specific resistance and inductance at limit frequency fL
- C.2.3 AT system
- C.2.3.1 Specific capacitance
- Table C.5 — Specific capacitance matrix values of AT systems
- C.2.3.2 Specific resistance and inductance
- C.3 Characterization of the trains
- Table C.6 — Characterization of one AC train with respect to impedances, harmonics and stability
- Table C.7 — Characterization of one DC train with respect to impedances, harmonics and stability
- Annex D (informative) Examples experienced in DC systems
- Figure D.1 — Example of observed phenomena on DC networks
- Figure D.2 — Example of instability on a long DC electrified line
- Annex ZZ (informative) Relationship between this European Standard and the Essential Requirements of EU Directive (EU) 2016/797 aimed to be covered
- Table ZZ.1 — Correspondence between this European Standard, Commission Regulation (EU) N 1302/2014 concerning the Technical Specification for Interoperability (TSI) relating to the subsystem ‘rolling stock LOC&PAS’ of the rail system in the European ...
- Table ZZ.2 — Correspondence between this European Standard, Commission Regulation (EU) N 1301/2014 concerning the technical specifications for interoperability relating to the ‘energy’ subsystem of the rail system in the Union* and Directive (EU) 201...
- Bibliography [Go to Page]
