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Method for Determination of Power Feasible Region of Tie Line Based on Multi-parameter Programming Theory
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A tie-line power and determination method technology, applied in the field of determining the feasible domain of tie-line power based on multi-parameter programming theory, can solve problems such as equivalent model errors
Active Publication Date: 2020-08-04
CHONGQING UNIV
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However, the constraint limit of the transmission power of the equivalent branch calculated by this type of equivalent model is closely related to the power flow state before the equivalent value. If the optimized power flow state deviates from the power flow state before the equivalent value, this type of equivalent model will produce huge error
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[0116] see figure 1 , a method for determining the feasible region of tie line power based on multi-parameter programming theory, mainly includes the following steps:
[0117] 1) Obtain the basic parameters of the power network under the AC tie line and the basic parameters of the power network under the DC tie line.
[0118] The basic parameters of the power network mainly include the component parameters in the original network, the topology of the original network and the calculation results of the power flow at the near time.
[0119] The component parameters in the original network mainly include the ground admittance of all nodes, the connected load power of all nodes, the impedance of all lines, the susceptance of all lines to ground, the constraints of line transmission power, the transformer impedance, and the ground conductance of transformers. Na, transformer ratio, transformer transmission power constraints, generator output size, generator output constraints.
[0213] Internal nodes: node 1 to node 79, node 113 to node 118.
[0214] Among them, the IEEE 118 node test system has three tie lines: branch 81-68, branch 82-77 and branch 84-74. The rest of the parameter settings in the test system are detailed in Table 1-Table 4.
[0215] Table 1 Parameter settings in the test system
[0216]
[0217] Table 2 Test system parameter settings
[0218]
[0219] Table 3 Test system parameter settings
[0220]
[0221] Table 4 Test system parameter settings
[0222]
[0223] 2) Different comparison models
[0224] In order to verify the equivalent model proposed by the present invention considering the operation constraints of th...
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Abstract
The invention discloses a method for determining tie line power feasible region based on multi-parameter programming theory, which mainly comprises the following steps: 1) acquiring power network basic parameters under AC tie line and power network basic parameters under DC tie line. 2) According to the basic parameters of power network under AC tie line, the optimal power flow model of external network under AC tie line is established. 3) According to the basic parameters of the power network under the DC tie line, the optimal power flow model of the external network under the DC tie line isestablished. 4) solving the feasible region of the power of the AC tie line; 5) solving that feasible region of the power of the DC tie line. The invention can accurately depict the feasible region ofthe power of the DC tie line and the AC tie line, provides accurate tie line boundary conditions for the optimization of the regional power network, and ensure the safety and economy of the optimization result of the regional power network.
Description
technical field [0001] The invention relates to the field of power systemeconomic optimization calculation, in particular to a method for determining the feasible region of tie line power based on multi-parameter programming theory. Background technique [0002] The existing power system has developed into a complex interconnected large power grid with hierarchical partitions, such as the large interconnected power grid in the United States and Canada, the large interconnected power grid in Europe, and the synchronous large power grid in China. In order to realize the optimal allocation of resources among the regional power grids and achieve the optimal grid economy, the power exchange between the tie lines of the regional power grids is very important. However, since regional power grids usually belong to different independent operating entities, there are concerns about data privacy, resulting in the inability to share data, achieve integrated optimal power flow, and fail...
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