Improved risk assessment electricity generation and load power adjustment method
A risk assessment, load power technology, applied in the direction of reducing/preventing power oscillation, electrical digital data processing, single-network parallel feeding arrangement, etc. Number of devices adjusted, time-saving effect
Inactive Publication Date: 2014-09-10
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology
[0008] In view of the current power adjustment method, there are problems such as programming difficulties, serious time-consuming, large errors, and the possible overrun of the balancing machine due to the power unbalance caused by the output adjustment is all borne by the balancing machine. The power
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[0026] Taking the IEEE24 node system as an example, the present invention will be described in detail in combination with the drawings and attached tables.
[0027] Such as figure 1 As shown, the improved risk assessment generation-load power adjustment method of the present invention is formed by introducing the two concepts of generation adjustment coefficient and load adjustment coefficient, and improving the power adjustment model using analytical method for power distribution analysis. Taking the IEEE24 node system as an example, the specific steps are as follows:
[0028] The application flowchart of the present invention in this IEEE24 node system risk assessment is as follows figure 2 As shown, by calling the power flow calculation program to scan the faults in the expected accident concentration, when the power flow exceeds the limit, the method proposed by the present invention is used to adjust the power.
[0029] Step 1: Input system information, including power...
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The invention discloses an improved risk assessment electricity generation and load power adjustment method. The improved risk assessment electricity generation and load power adjustment method includes the steps that load flow calculation is carried out on a system, and whether load flow threshold-crossing exists in the system or not is judged; if load flow threshold-crossing exists, power distribution analysis is carried out with a threshold-crossing branch as a target branch, an electricity generator node set transmitting power to the target branch and a load node set deriving power from the target branch are obtained, and the power transmitted to the target branch by nodes and the power derived from the target branch by the nodes are also obtained; electricity generation adjustment coefficients of the nodes in the electricity generator node set and load adjustment coefficients of the nodes in the load node set are calculated; the electricity generator nodes with the relatively high electricity generation adjustment coefficients and the load nodes with the relatively high load adjustment coefficients are screened out as adjustment objects; power adjustment is carried out on the screened adjustment objects in proportion. By the adoption of the improved risk assessment electricity generation and load power adjustment method, the number of devices needing to be adjusted is effectively decreased, and a large amount of time is saved.
Description
technical field [0001] The invention belongs to the field of power system risk assessment, and in particular relates to a method for risk assessment generation-load power adjustment. Background technique [0002] At present, power system security assessment methods are divided into two categories: deterministic methods and uncertain methods. [0003] The deterministic method is based on the analysis of foreseen accidents. In the most serious case of the system, the system safety and stability margin for a specific foreseen accident is obtained. This method has clear physical meaning, requires less data, has a large safety margin, and is reliable. The theoretical research is relatively mature, but it only pays attention to the most serious accidents, and the worst case is used for verification. The system operating point determined by it is too conservative, and the complexity and randomness of the system operation are ignored. The security level above lacks quantitative mea...
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Login to View More IPC IPC(8): H02J3/38H02J3/24G06F19/00
Inventor 苏寅生李鹏李智欢曾沅牛瑞馨涂文文李灿
Owner CHINA SOUTHERN POWER GRID COMPANY