Method and device for judging unstable operation of railway interconnected power supply
A technology of power supply device and determination method, which is applied in the field of railway power supply and distribution and power electronic conversion, can solve the problems of uncertain time variable and difficulty in stable operation of interconnected power supply, and achieve the effect of multiple dimensions and wide coverage
Pending Publication Date: 2021-10-19
ZHUHAI WANLIDA ELECTRICAL AUTOMATION +1
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[0004] However, it is difficult to judge whether the interconnected power supply can operate stably, because the various indicators are affected by a wide range of factors, various types, and uncertain time variables
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[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described implementation examples are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention.
[0027] An embodiment of a method for judging the unsteady operation of a railway interconnected power supply:
[0028] see figure 1 , a method for judging the unsteady operation of a railway interconnected power supply, the method comprising the following steps:
[0029]First of all, judge the unstable operation state of the railway interconnected power supply device acco...
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The invention provides a method and device for judging the unstable operation of a railway interconnected power supply, and the method comprises the steps: judging the unstable operation state of a railway interconnected power supply device according to a priority sequence, and determining the abnormal state, the fault state or the upcoming fault state of a load and the interconnected power supply within the shortest time according to a judgment result, wherein the judgment of the unstable operation state comprises the following judgment: judging the control instability; judging the critical non-stability under the disturbance of the load side; judging the thermal instability; judging the non-stability of the protection action; and judging the communication instability. The device is applied to the method. According to the method, the unstable operation state of the railway interconnected power supply device can be judged according to the sequence, and the abnormal state, the fault state or the fault-about state of the load and the interconnected power supply can be determined in the shortest time.
Description
technical field [0001] The invention relates to the technical field of railway power supply and distribution and power electronic conversion, in particular to a method for judging the unsteady operation of a railway interconnected power supply and a railway interconnected power supply device applying the method. Background technique [0002] As land resources become more and more scarce, the construction of line corridors and corridor space occupies an increasingly important proportion of investment in power construction. Especially in the construction of railways, the 10kV and 35kV power lines of railway power are introduced into the process sinks of power switching stations and power distribution stations, occupying a large amount of land resources. On the other hand, the 10kV and 35kV power supplies required for railway power supply and distribution are extremely scarce in some areas. The direct conversion of railway traction 27.5kV to 10 and 35kV voltages suitable for p...
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IPC IPC(8): G01R31/40
CPCG01R31/40
Inventor 姚鹏刘贻军牛金平王颢王川刘广军郭红卫孟金林张晓辉王小星任虔英朱志伟范强军林子超王海玉林林
Owner ZHUHAI WANLIDA ELECTRICAL AUTOMATION