Abstract: A harmonic-characteristics based current pattern matching method for the non-intrusive power load monitoring and disaggregation is provided in this present invention, on the basis of establishing the load signature database, which comprises electrical appliance registration and load state word space initialization, data acquisition and data preprocessing, feasible state word space search based on table looking-up, the optimal matching of current pattern, and display and output of the monitoring and disaggregation results. The method improves the accuracy of disaggregation, and can achieves exact identification of operating states of appliances, and also can reduce the cost.

Abstract: The invention discloses a region-based security evaluation method for the distribution system, which belongs to the eld of electric power distribution system operation. The method contains the following steps: (1) acquiring distribution system security region and security boundaries according to substation transformer capacity of the distribution system and link relationships among the substation transformers (101); (2) acquiring the distance between operating point and the security boundaries (IO2); (3) judging whether the operating point is within the distribution system security region according to the distance between the operating point and security boundaries (103); if yes, performing step (4), otherwise, performing step (5); (4) acquiring the load shortage or excess L,- of a link unit (I04); (5) adjusting the load of the substation transformers until the operating point comes back to the distribution system security region, then performing step (4) (IO5).

Abstract: A harmonic-characteristics based current pattern matching method for the non-intrusive power load monitoring and disaggregation is provided in this present invention, on the basis of establishing the load signature database, which comprises electrical appliance registration and load state word space initialization, data acquisition and data preprocessing, feasible state word space search based on table looking-up, the optimal matching of current pattern, and display and output of the monitoring and disaggregation results. The method improves the accuracy of disaggregation, and can achieves exact identification of operating states of appliances, and also can reduce the cost.

Abstract: The present invention relates to a power system and provides a method for considering the network security constraints of in the operation of economic dispatch of power systems, which comprises the power flow constraint of branches, the static voltage stability constraint and the transient stability constraint, and provides an effective way for coordinating contradiction between the economy and security of power system operation.

Abstract: The invention discloses a region-based security evaluation method for the distribution system, which belongs to the field of electric power distribution system operation. The method contains the following steps: a. acquiring distribution system security region and security boundaries according to substation transformer capacity of the distribution system and link relationships among the substation transformers (101); b. acquiring the distance between operating point and the security boundaries (102); c. judging whether the operating point is within the distribution system security region according to the distance between the operating point and security boundaries (103); if yes, performing step (4), otherwise, performing step (5); d. acquiring the load shortage or excess Li of a link unit (104); e. adjusting the load of the substation transformers until the operating point comes back to the distribution system security region, then performing step (4) (105).