| 摘要 |
A symmetrical method for acquiring a linear active power flow in a multi-terminal direct current power grid, comprising: firstly, establishing a symmetric linear indeterminate system of equations of a node injection active power with respect to a node voltage offset (S1); then according to the symmetric linear indeterminate system of equations, establishing a symmetric linear matrix relationship of the node voltage offset with respect to the node injection active power, and acquiring the node voltage offset of each node and the node voltage total amount in a multi-terminal direct current power grid (S2); and finally, according to the symmetric linear matrix relationship, a known non-branch linear active power flow and multi-terminal direct current power grid running characteristics, establishing a symmetric linear function relationship of a branch linear active power flow with respect to the node injection active power, and acquiring a linear active power flow of each branch in the multi-terminal direct current power grid (S3), with acquired results all being accurate and reliable. The method not only satisfies the requirements of the real-time performance of regulating and controlling the running of simple structural multi-terminal direct current power grid and changing a running state within a large range, and is also applicable to a complicated structural multi-terminal direct current power grid. |
