Power system failure alarm method taking digitized substation secondary circuit signals into account
A power system and secondary circuit technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of judging the limitations of protection refusal to operate and misoperation, and achieve improved accuracy and interpretability, fast calculation speed, and realization simple effect
Active Publication Date: 2014-04-23
TSINGHUA UNIV +1
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Problems solved by technology
The current fault diagnosis method mainly relies on the protection action signal and the switch action signal, which has limitations in judging the protection refusal to operate and malfunction
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[0027] The power system fault alarm method considering the secondary circuit signal of the digital substation proposed by the present invention comprises the following steps:
[0028] (1) Set all substations in the power system as digital substations, and obtain configuration description (SCD) files from digital substations;
[0029] (2) According to the configuration description file of each digital substation, generate all protection models in the power system in the alarm system database of the power system, and each protection model belongs to one of the protection types listed in Table 1:
[0030] Table 1 Protection model
[0031]
[0032] And generate the models of all protected secondary circuits in the power system, each secondary circuit model belongs to one of the protected secondary circuit types listed in Table 2:
[0033] Table 2 Secondary circuit model
[0034]
[0035] by figure 1 The power system shown is one embodiment of the invention and includes tw...
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The invention relates to a power system failure alarm method taking digitized substation secondary circuit signals into account, and pertains to the technical field of power system dispatching automation and power system simulation. At first, a protection configuration file is acquired to generate a protection model and a secondary circuit model; and then the protection pressing plate state, the protection lockout state and protection alarm signals are acquired, and assignment is performed on corresponding variables according to the protection pressing plate state, the protection lockout state and the protection alarm signals. Then, the protection action is evaluated according to secondary circuit information, and the protection signal maloperation is judged and the protection signal operation rejection is explained through the protection pressing plate state and the protection lockout state separately. According to the method provided in the invention, substation secondary circuit signals which are not used in general diagnostic alarm are utilized, so the accuracy and interpretability of substation diagnostic alarm can be significantly improved. The method of the invention has advantages of simple implementation and fast calculation speed, and is suitable for field applications.
Description
technical field [0001] The invention relates to a power system fault alarm method considering the secondary loop signal of a digital substation, and belongs to the technical fields of power system scheduling automation and power system simulation. Background technique [0002] The intelligent power system requires the power system to be self-healing, and the intelligent alarm of power system faults is an important prerequisite for realizing the "self-healing" of the power system. The local substation has a wealth of alarm data. Diagnosis and alarm in the substation can make full use of local information to obtain fast and reliable diagnosis results, which has inherent advantages. The current fault diagnosis method mainly relies on the protection action signal and the switch action signal, which has limitations in judging the protection refusal to operate and malfunction. Contents of the invention [0003] The purpose of the present invention is to propose a power system f...
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IPC IPC(8): H02H7/26H02H7/22H02H7/045
Inventor 吴文传林子钊张伯明江伟孙宏斌王谦郭庆来牟佳男
Owner TSINGHUA UNIV