Method for determining redundancy number of components of relay protection device
A technology for a relay protection device and a determination method, which is applied to emergency protection circuit devices, automatic disconnection emergency protection devices, electrical components, etc. Strong practical value, accurate redundant quantity, simple calculation effect
Pending Publication Date: 2020-12-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
After the replacement of domestic components, the performance of the components has declined, which may lead to a decrease in the reliability of the relay protection device. It is necessary to improve the reliability of the relay protection device through redundant components and reduce the probability of failure.
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[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0018] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings, as figure 1 Shown is a schematic flowchart of a method for determining the redundant quantity of relay protection device components provided by an embodiment of the present invention, and the method includes:
[0019] Step 1. First, select a suitable redundancy method from different redundancy methods;
[0020] In th...
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The invention discloses a method for determining the redundancy number of components of a relay protection device. The method comprises the following steps of: firstly, selecting a proper redundancy mode from different redundancy modes; solving the failure rate of each component in different redundancy modes according to the reliability of each component; according to a series reliability model ofthe relay protection device, solving the failure rate of the relay protection device after component combination, and selecting a redundancy mode with the highest cost under the condition that the reliability requirement is not met; and gradually increasing the number of the components one by one according to the sequence of the cost of the components from low to high until the reliability requirement of relay protection is met, thereby determining the redundancy number of each component which meets the reliability requirement of the relay protection device and has the minimum cost. The method is simple in calculation, can accurately determine the redundancy number of each component of the relay protection device, and has a very high practical value.
Description
technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a method for determining the redundant quantity of components of a relay protection device. Background technique [0002] The relay protection system is the first line of defense to prevent the damage to the power system caused by faults and disturbances. The role of autonomous control is particularly important. The core components (CPU, DSP, FPGA, memory chip, ADC, power chip, etc.) that make up various protection devices are almost all imported from Europe and the United States. The equipment cannot be produced normally, and the physical basis of the three lines of defense that guarantees the safety and stability of the power grid is shaken. The safe operation of the power grid is facing major risks, seriously affecting national security, the national economy and people's lives. Therefore, national production of relay protection devices has beco...
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IPC IPC(8): H02H3/05H02H3/00
CPCH02H3/05H02H3/006
Inventor 薛安成陈晓帆
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)