Robust available power transmission capacity evaluation method for power transmission system
A technology with power transmission capability and system robustness, applied in system integration technology, information technology support system, data processing application, etc., can solve the problem that the probability distribution function of wind power cannot be accurately obtained.
Inactive Publication Date: 2016-02-24
NANJING UNIV OF POSTS & TELECOMM
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However, in the actual power grid, the probability distribution function of wind power cannot be accurately obtained, and the existing technology has not been able to provide a practical and effective evaluation method for the available transmission capacity considering the uncertainty of the probability distribution of wind power, so that it can be used only when the probability distribution function of wind power is known. Optimizing the Available Transmission Capacity of the Transmission Network Based on Second Moments
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[0036] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0037] Such as figure 1As shown, the present invention discloses a method for evaluating the robust available transmission capacity of a power transmission system. For the situation where the probability distribution function of wind power in the actual power system is unknown, firstly, under the background of no definite probability distribution function, the probability distribution robust The chance constrained optimization model describes the objective function, and then uses the robust optimization method to eliminate the random variables in the optimization model, and transforms it into a deterministic model containing only the second-order moment information of the random variables, and then adopts the immune system based on linear matrix inequality optimization The particle swarm algorithm solves the deterministic model. The specific steps...
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The present invention discloses a robust available power transmission capacity evaluation method for a power transmission system. Under the condition that wind power probability distribution is not fully known, the method can maximize available transmission capacity under constraint precondition of ensuring the system to operate safely. The method comprises: firstly, in the context of no determined probability distribution function, describing an available transmission capacity evaluation problem by using a probability distribution robust opportunity constraint optimization model; secondly, eliminating a random variable in the optimization model with a robust optimization method, and converting the optimization model into a deterministic model only containing second-order moment information of the random variable; and thirdly, performing computation on the deterministic model by using an immune particle swarm algorithm based on linear matrix inequality optimization. The method provided by the present invention meets the situation that a wind power prediction technique is limited in an actual power transmission system and an accurate wind power probability distribution function cannot be obtained; and a robust available power transmission capacity evaluation policy meets actual demands.
Description
technical field [0001] The invention relates to the technical field of transmission network reliability, in particular to a method for evaluating robust and available transmission capacity of a transmission system. Background technique [0002] The available transmission capacity of the transmission network has a great influence on the safety and reliability of the entire power system. In the electricity market environment, the power transmission capacity of the power grid is based on the existing power transmission contract. Under the condition of ensuring the safe and reliable operation of the system, the maximum power transmission may be increased between regions or between points. Uncertainty factors have a great impact on the available transmission capacity of the transmission system. For example, the failure of lines and generators may lead to a decrease in the transmittable power of the transmission network. With the widespread access of distributed generators, how t...
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Login to View More IPC IPC(8): G06Q10/04G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 王璐谢俊岳东黄崇鑫王珂李亚平
Owner NANJING UNIV OF POSTS & TELECOMM