Cutoff measure cooperated power flow monitoring method of electromagnetic ring network
An electromagnetic ring network and cutting machine technology, applied in the direction of parallel feeding arrangement of a single network, can solve the problems of power grid blackout, lack of effective monitoring, low-voltage line overcurrent, etc., to ensure safe operation, simple and easy programming, The effect of reducing work intensity and stress
Inactive Publication Date: 2014-09-03
GUANGXI POWER GRID CORP +1
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Problems solved by technology
[0008] The present invention aims to solve the lack of effective monitoring of the high and low voltage electromagnetic ring network flow in the existing online monitoring method of the magnetic ring network. When the high voltage line is disconnected, the low voltage line may still have overcurrent, which may easily cause large-scale power outages in the power grid. Insufficiency of the accident, to provide a high-voltage electromagnetic ring network, when the high-voltage line is tripped and disconnected, and the power dispatching control center takes measures to cut off the corresponding monitoring unit after the low-voltage line does not flow, ensuring the safety of the low-voltage line A monitoring method of electromagnetic ring network power flow under the operation of cooperating with machine cut measures
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[0042] Embodiment: A method for monitoring the power flow of an electromagnetic ring network under the measures of coordinating machine cut-offs, comprising the following steps:
[0043] (1-1) According to the historical operation of the high and low voltage electromagnetic ring network to be monitored, analyze and determine the high voltage line L that needs to be monitored in the high and low voltage electromagnetic ring network h and low voltage line L L ;
[0044] (1-2) Introducing the conventional distribution coefficient method to monitor the high and low voltage electromagnetic ring network, the power flow control formula of the conventional distribution coefficient method is:
[0045] L 1 +a*L 2 ≤Lmax1 (1)
[0046] In the formula: a is the distribution coefficient, which is a constant during scheduling and monitoring, L 1为 The power flow value of the low voltage line, L 2为 The flow value of the high-voltage line, Lmax1 is the stability limit of the low-voltage li...
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The invention discloses a cutoff measure cooperated power flow monitoring method of an electromagnetic ring network, and aims at providing the method which enables that a low-voltage line is not overcurrent when a high-voltage line is tripped and cut off and a cutoff measure is adopted in the high / low voltage electromagnetic ring network. According to different output of cut sets, the distribution coefficient of the high / low voltage electromagnetic ring network is calculated in a routine distribution coefficient method; power generation transfer factors of the low and high voltage lines are calculated in a power flow control method of the cutoff measure; the high / low voltage electromagnetic ring network is monitored according to a certain formula when the electrical network operates normally; and when the high-voltage line is tripped and cut off, a power scheduling control center adopts the cutoff measure to cut off the sets to ensure that the low-voltage line is not overcurret and ensure safe operation of the low-voltage line. The monitoring method is mainly applied to cutoff measures of the high / low voltage electromagnetic ring network.
Description
technical field [0001] The invention relates to the technical field of electromagnetic ring network power flow monitoring, in particular to a method for monitoring electromagnetic ring network power flow under the measures of cooperating with cutting machines. Background technique [0002] An important hazard of the electromagnetic ring network is that the power flow transfer caused by the tripping of the high-voltage line is likely to cause damage to the stability of the low-voltage line. In severe cases, it may even cause a chain reaction and cause large-scale power outages. Therefore, in actual operation, the analysis, calculation and dispatching monitoring of the electromagnetic ring network has always been an important task of the dispatching department. [0003] At present, the most widely used form of analysis, calculation and scheduling monitoring is that the sum of the power flow value of the high-voltage line and the power flow value of the low-voltage line is less...
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IPC IPC(8): H02J3/46
Inventor 孙艳李如琦李凌杭乃善邓秋荃凌武能吴敏周智成王德付苏毅王刚黄珑张镱议
Owner GUANGXI POWER GRID CORP