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Network equivalent method based power distribution network reliability analysis method and system

A technology of network equivalent method and analysis method, which is applied in the value method distribution network reliability analysis method and system field, can solve the problems of power grid frequency and stability, increase the operating cost of the power grid, etc., and achieve strong adaptability and principle Clear, adaptable effect

Active Publication Date: 2014-12-17
SHANGHAI JIAO TONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, due to the periodicity, intermittentness and randomness of the output of photovoltaic power plants, centralized photovoltaic power plants with large capacity will have a serious impact on the frequency and stability of the power grid, and it is necessary to add system backup power generation capacity for them, which in turn involves The planning problem of grid reserve capacity, and it will increase the grid operation cost

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  • Network equivalent method based power distribution network reliability analysis method and system
  • Network equivalent method based power distribution network reliability analysis method and system
  • Network equivalent method based power distribution network reliability analysis method and system

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Embodiment 1

[0047] refer to figure 1 - Fig. 6, the distribution network reliability analysis method based on the network equivalent method provided by the present invention, comprises the following steps:

[0048] S1: Establish distribution network reliability model;

[0049] S2: Obtain the reliability parameters of each component, each feeder and each load point in the distribution network;

[0050] S3: Use the network equivalent method to simplify and equivalent the more complex units in the power distribution system, and simplify the more complex distribution network into a relatively simple radial distribution network;

[0051] S4: Use FMEA to establish the failure mode and consequence analysis table for each load point in the simplified equivalent distribution network;

[0052] S5: Obtain the reliability parameters of the load point, recalculate, and compare and analyze the reliability indicators of the entire power distribution system before and after grid-connected to the distrib...

Embodiment 2

[0116] refer to Figure 7 , the distribution network reliability analysis system based on the network equivalent method provided by the present invention can be used to implement the distribution network reliability analysis method based on the network equivalent method provided by embodiment 1, the system includes:

[0117] Reliability model establishment unit 1: used to establish a distribution network reliability model;

[0118]Reliability parameter acquisition unit 2: used to acquire the reliability parameters of each component, each feeder and each load point in the distribution network;

[0119] Simplified equivalent unit 3: used to simplify and equivalent the more complex units in the distribution network by using the network equivalent method;

[0120] Failure mode and consequence analysis unit 4: used to use FMEA to establish its failure mode and consequence analysis table for each load point in the simplified equivalent distribution network;

[0121] Analysis and c...

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Abstract

The invention discloses a network equivalent method based power distribution network reliability analysis method and system. The method includes the following steps: establishing a power distribution network reliability model; acquiring reliability parameters of each component, each feeder and each load point in a power distribution network; performing simplified equivalence on complicated units in the power distribution network by the aid of the network equivalent method; establishing a failure mode and a consequence analysis sheet of each load point, subjected to simplified equivalence, of the power distribution system by means of FMEA (failure mode and effects analysis); acquiring reliability parameters of the load points, and computing and comparing reliability indexes of the entire power distribution network before and after the power distribution network is combined with a grid and connected into a distributed photovoltaic power supply. The system comprises a reliability model establishing unit, a reliability parameter acquisition unit, a simplified equivalence unit, a failure mode and consequence analysis unit and an analysis comparison module. The network equivalent method based power distribution network reliability analysis method and system is clear in principle, simple in model, relative small in calculated amount, high in adaptability and easy to apply to practical engineering.

Description

technical field [0001] The invention relates to the technical field of electric power information, in particular to a distribution network reliability analysis method and system based on a network equivalent method. Background technique [0002] The distribution network is the terminal that provides power to users, and its reliability performance is closely related to the reliability of power supply. The research data show that: the power outage accidents caused by the distribution network account for a large proportion of the total power outage accidents of users. The reliability research of distribution network is of great significance. In addition, the distribution network is developing very rapidly and its scale continues to increase. With the rapid development of the photovoltaic industry and the improvement of grid-connected core technologies, photovoltaic power sources will be widely used in distribution networks, which will inevitably have a negative impact on the r...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/56
Inventor 王昕郑益慧李立学黄珂郎永波邵凤鹏
Owner SHANGHAI JIAO TONG UNIV
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