A method for real-time calculation of power control strategies for weak tie lines in large and small power grids
A tie-line power, real-time calculation technology, applied to AC networks, circuit devices, AC network circuits with different sources of the same frequency, etc. , effective technical measures and other issues to achieve the effect of precise control
Active Publication Date: 2019-04-05
NANJING NARI GROUP CORP +3
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Problems solved by technology
However, the theoretical research on power control decision-making methods for weak tie-lines in large and small power grids has not attracted enough attention, and there is still a lack of targeted and effective technical measures in engineering applications
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[0054] refer to figure 1 , a method for real-time calculation of the power control strategy of the weak tie line of the large and small power grids proposed by the present invention, comprising the following steps:
[0055] Step S1: First, it is necessary to obtain basic information, which includes tie-line power control target information, and the tie-line power control target information includes: small grid grid power limit P Umax And the allowable duration T of small grid grid power exceeding the limit Umax , the off-grid power limit P of the large power grid Dmax And the allowable duration T of off-grid power exceeding the limit of the large power grid Dmax .
[0056] The above-mentioned small grid grid power limit P Umax And the allowable duration T of small grid grid power exceeding the limit Umax and off-grid power limit P Dmax And the allowable duration T of off-grid power exceeding the limit of the large power grid Dmax They are all based on the grid-connectio...
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The invention belongs to the technical field of weak-tie call wire power control of large and small power grids, and discloses a method for calculating weak-tie call wire power control strategies of large and small power grids in real time. The method comprises the steps of obtaining call wire power control target information firstly; then enabling an installation and mounting apparatus to monitor and analyze call wire power changing conditions in real time; next, predicting a call wire power changing curve after call wire power abrupt change; then performing prediction and evaluation on a call wire power out-of-limit condition; and finally, calculating the control strategies in real time. By adoption of the method, effective and accurate control of the call wire power in a weak-tie condition of the large and small power grids can be realized, so that the safety and the stability of the large and small power grids in weak-tie operation can be greatly improved, and coordinative development between large power grids and small power grids is promoted.
Description
technical field [0001] The invention belongs to the technical field of power control of weak tie lines in large and small power grids, and in particular relates to a method for real-time calculation of power control strategies for weak tie lines in large and small power grids. Background technique [0002] In order to ensure the safe and stable operation of the interconnected grid and the effective implementation of the inter-grid power trading plan, the tie-line power must be controlled within the specified range. Using automated means, it is possible to achieve more precise control of the power of the tie line. The most common is the security control system to control the power of the tie line not to exceed the limit and the AGC (Automation Generation Control) to control the power deviation of the tie line. Usually the former is for large disturbances The sudden change of the tie-line power caused by the latter is for the power fluctuation of the tie-line in the steady-sta...
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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 李碧君尹玉君罗剑波陈征谢传治薛峰孙玉军梁琛
Owner NANJING NARI GROUP CORP