Fault diagnosis and positioning device and method for secondary voltage loop of intelligent substation
A technology of intelligent substation and secondary voltage, which is applied in the direction of circuit device, fault location, fault detection according to conductor type, etc., can solve problems such as inability to correctly distinguish and locate faults, and achieve improved operation and maintenance efficiency, easy design, and rapid elimination Effect
Pending Publication Date: 2022-02-25
国网陕西省电力公司西咸新区供电公司
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[0006] The purpose of the present invention is to solve the problems in the prior art, provide a smart substation secondary voltage loop fault diagnosis and positioning device and method, and solve various physical wiring faults such as virtual connection, short circuit, and switching of the secondary voltage loop of the protection device and failures. Correctly distinguish the problems of locating faults and quickly solving faults, and finally ensure that the power distribution network can provide reliable and safe power supply
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[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0033] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...
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The invention discloses a fault diagnosis and positioning device and method for a secondary voltage loop of an intelligent substation. A remote control terminal sends a control signal to control an in-situ signal source, so that the in-situ signal source simulates alternating current and direct current signals with different amplitudes; the in-situ signal source is connected to a secondary side output port of a PT mutual inductor and provides a driving signal for the secondary voltage loop; a PT transformer transmits a voltage signal to a protection device; the protection device converts the voltage signal into a voltage telemetry signal and transmits the voltage telemetry signal to a master station system; and the remote control terminal simulates the master station system, collects the voltage telemetry signal transmitted by the protection device, compares the actual voltage analog quantity signal output by the remote control terminal through the local signal source with the voltage telemetry signal transmitted by the protection device, and judges the fault type of the secondary voltage loop. Under the cooperation of a model prediction theory, faults such as virtual connection, short circuit and commutation of the secondary voltage loop are effectively positioned, so that the field operation and maintenance efficiency of the intelligent substation is improved, and safe operation of a power grid is ensured.
Description
technical field [0001] The invention belongs to the field of intelligent substation fault location and detection, and relates to a fault diagnosis and location device and method for a secondary voltage circuit of an intelligent substation. Background technique [0002] Due to the high degree of system integration and reasonable structural layout, smart substations have achieved certain results in economical, energy-saving and environmental protection. However, in actual use, many problems have also been exposed. Especially in the operation and maintenance of the secondary system of the smart substation, the heavy maintenance workload and high maintenance cost greatly restrict the development of the smart substation. At present, the following problems exist in the on-site operation and maintenance of the secondary system of the smart substation: [0003] (1) At present, the structure of the new generation of smart substation mainly adopts the method of analog quantity sampl...
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IPC IPC(8): G01R31/08H02J13/00
CPCG01R31/086H02J13/0004Y04S10/52
Inventor 牛亮赵烜王沙沙冯博源袁铭酉李满春王鹤翔杨萌瑞曾翔王耀东蔡晓亮郑立文张云柯彭清源朱菲层郑薇邴瑾冯自权程林
Owner 国网陕西省电力公司西咸新区供电公司