Method for identifying normal state of distribution network
A technology of normal state and identification method, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of inability to accurately reflect the operating state of the power grid, misjudgment of the operating state of the power grid, and the overall situation of the difficult power system.
Active Publication Date: 2014-03-12
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
The index system evaluation method often uses a single or isolated electrical index (such as grid frequency, key node voltage, etc.) to judge the operation of the power grid. Difficult to reflect the overall situation of power system operation
For example, in practical applications, since some electrical indicators of the power grid are allowed to operate for a period of time beyond the normal limit, if the power grid is judged to be in a risk state or emergency state only based on the electrical index exceeding the normal limit, it will not truly reflect the actual operating state of the power grid. , and in severe cases, it will lead to misjudgment of the operating state of the power grid, thus taking unnecessary control measures
Therefore, the existing method of identifying the operating state of the distribution network using a single or isolated electrical index cannot accurately reflect the current operating state of the power grid. It is urgent to find a new method to accurately locate the operating state of the distribution network
Method used
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[0046] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0047] The overall diagram is shown in Figure 1. For the identification of the normal state of a certain node in the distribution network, this embodiment takes the flow chart when the results of the exclusion method and the index calculation method are in the same state as an example, as shown in figure 2 As shown, it specifically includes the following steps:
[0048] (1) Collect the operation information of the distribution network, and divide the operation state of the power grid according to the definition of the operation information. If the current state of the power grid is neither a risk state, nor an emergency state, nor a recovery state, nor an optimization state, it will start normally. state recognition.
[0049] (2) Real-time multi-source information (including but not limited to power grid operation info...
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The invention relates to a method for identifying a normal state of a distribution network. The method is used for identifying the normal state of the distribution network by using an exclusive method and an index calculation method. In the method, starting and ending conditions and starting and ending rules for identification of the normal state, and an index judgment rule are provided, and specific flows for identification of the normal state of the distribution network are implemented independently and asynchronously by using the exclusive method and the index calculation method, so the accurate identification of the normal state of the distribution network is realized. The identification of the normal state based on the exclusive method is carried out in real time. The identification of the normal state based on the index calculation method is carried out under the effective starting condition, and an index calculation result can be used for quantitatively evaluating the level of the normal state and providing quantitative decision reference for a dispatcher. The method is applicable to operational analysis of the distribution network and identification of the normal state of the distribution network in on-line control.
Description
Technical field: [0001] The invention relates to the technical field of distribution network analysis and control, in particular to a method for identifying a normal state of a distribution network. Background technique: [0002] With the continuous expansion of the distribution network scale, the operation of the distribution system is becoming more and more complex. For the operation and management personnel of the power grid, it is necessary to intuitively understand the operation status of the power system they are responsible for at any time, and to make corresponding adjustments and controls; for intelligent To achieve self-healing control of the distribution network, it is necessary to quickly, accurately and comprehensively grasp the real-time operation status of the power grid, predict and analyze the operation trend of the power grid, so as to ensure the safe, stable and reliable operation of the power system. Therefore, accurate recognition of the operating status...
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IPC IPC(8): H02J3/00
Inventor 张瑜宋晓辉盛万兴孟晓丽
Owner CHINA ELECTRIC POWER RES INST