Simulation evaluation method for configuration scheme of safe automatic device of transmitting-end power grid high-frequency cutting machine

Abstract

The invention discloses a simulation evaluation method for a configuration scheme of a safe automatic device of a transmitting-end power grid high-frequency cutting machine. The method comprises the following steps of: establishing a transmitting-end power grid frequency simulation data model comprising important components related with frequency control of a machine set side and a power grid side; setting basic research operating points of the electric power outgoing level of a transmitting-end electric network; supposing that the safe automatic device of a direct current latch-up linkage cutting machine is correctly operated, calculating two types of outgoing channel fault forms of the transmitting-end power grid for each basic research operating point one by one to obtain a simulation result of the transmitting-end electric network; supposing that the safe automatic device of the direct current latch-up linkage cutting machine fails to operate, calculating the two types of outgoing channel fault forms of the transmitting-end power grid for each basic research operating point one by one to obtain a simulation result of the transmitting-end electric network; and according to the simulation results obtained in the steps C and D, evaluating whether the effect of the configuration scheme of the safe automatic device of the high-frequency cutting machine is good. The method has the advantages of fast and accurate evaluation, comprehensive factor consideration and the like, is easy and convenient to operate, and is high in practical value.

Description

technical field [0001] The invention relates to a method for stabilizing the frequency of a power system, in particular to a simulation evaluation method for a configuration scheme of a safety automatic device for a high-frequency cut-off machine in a power grid at a sending end. Background technique [0002] The inconsistency in the geographical distribution of large-scale energy bases and load centers requires large-capacity and long-distance transmission of power. In order to take advantage of the advantages of direct current transmission, long economic transmission distance, flexible adjustment and high reliability of AC transmission operation mode, AC power is currently being built at the same time in the energy base. There is an increasing trend in power transmission from channels and DC channels to the external network. When the AC channel is disconnected due to a fault, or the AC channel and the DC channel are disconnected due to a fault at the same time, the frequenc...

AI Technical Summary

Problems solved by technology

Since the actual power system has extremely high requirements on the safety and stability of operation, the configuration scheme of the high-frequency cut-off safety automatic device cannot be tested only when the actual power grid fails, and can only be evaluated in advance through simulation calculations to demonstrate its science After it is effective, it will be put into grid use

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