Method for simulating harmonics of power system to be connected with electrified railway

A technology for electrified railways and power systems, applied in harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., and can solve problems such as difficulty in debugging, difficulty in convergence, and difficulty in debugging.

Active Publication Date: 2013-01-30
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0003] In the research method of injecting electrified railways into the power system, the existing large-scale power grid modeling and construction models are complex and difficult

Method used

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  • Method for simulating harmonics of power system to be connected with electrified railway
  • Method for simulating harmonics of power system to be connected with electrified railway
  • Method for simulating harmonics of power system to be connected with electrified railway

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] like figure 1 Shown, overall flowchart of the present invention; A kind of emulation method of electrified railway injecting power system harmonic, mainly comprises following several working steps:

[0053] Step 1: Build the ETAP power grid model, and equivalently form an equivalent power grid according to the respective rules for power grids other than the ETAP model; the equivalent method is to select the mode of the equivalent power grid, and determine the three-phase minimum short-circuit current, single-phase Minimum short circuit current and impedance ratio X / R.

[0054] Step 2: Power flow calculation and comparison of power flow calculation results: first, perform power flow calculation on the ETAP power grid model built in step 1; then compare the power flow calculation results with the existing planned grid power flow calculation result...

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Abstract

The invention discloses a method for simulating harmonics of a power system to be connected with an electrified railway. The method comprises the following working steps: (1) establishing an electrical transient analyzer program (ETAP) power system model; (2) utilizing the ETAP model to simulate triple frequency harmonics and multiples of the triple frequency harmonics of the power system to be connected with the electrified railway; (3) utilizing the ETAP model to simulate each frequency harmonic of the power system to be connected with the electrified railway except for the triple frequency harmonics and the multiples of the triple frequency harmonics; and (4) utilizing the ETAP model to simulate each frequency harmonic of the power system to be connected with the electrified railway. According to the method, the complexity of large-scale power system modeling is simplified, the difficulty of load flow calculation and debugging is overcome and the simulation and the research of the harmonics connected with the electrified railway are realized quickly and effectively. The method can be used for evaluating the impact on power quality of the power system before a power supply system is connected with the electrified railway, thereby guiding planning and design of the power system.

Description

technical field [0001] The invention relates to the field of research on power quality of electrified railways, in particular to a simulation method for electrified railways to inject harmonics into power systems. Background technique [0002] Electrical Transient Analyzer Program, ETAP for short, is a comprehensive power and electrical analysis and calculation software with comprehensive functions, which can provide a platform for planning, design, analysis, calculation, operation and simulation of power generation, power distribution and industrial power and electrical systems. At present, ETAP is widely used in various industries all over the world, including metallurgy, industrial and mining enterprises, petroleum, and nuclear power plants. [0003] In the research method of injecting electrified railway into the power system, the existing large-scale power grid modeling and construction model is complex and difficult to realize. It is difficult to debug and converge dur...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 张青青张高峰王庆玉付燕荣
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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