An optimization method for dynamic allocation of cps commands in interconnected power grids
A technology of dynamic allocation and optimization method, which is applied in the direction of electric digital data processing, single-network parallel feeding arrangement, special data processing application, etc., and can solve the problem of not involving cooperative learning of agents, CPS1 and ACE real-time curves are not smooth enough, and frequent adjustments And other issues
Active Publication Date: 2016-01-06
SOUTH CHINA UNIV OF TECH
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Although classical reinforcement learning can obtain the convergent equilibrium point under the premise of satisfying the CPS assessment standard of the power grid, the allocation factor action strategy with limited unit output combination space is used in the allocation process, so that the equilibrium point found may not be the optimal equilibrium point. point, the adjustment of various units is more frequent, the number of convergence steps is relatively long, and the real-time curves of CPS1 and ACE after convergence are not smooth enough
In addition, Q-learning, Q(λ)-learning, and hierarchical Q-learning are all single-agent reinforcement learning algorithms in essence, and do not involve collaborative learning between agents, and the action combinations of each agent are not necessarily joint optimal action
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[0064] In this example, the load frequency control model of a typical IEEE two-area interconnection system is taken as the research object. In the original model, only one unit simulates the power generation link. In this example, the pre-learning simulation is first selected in area A, so Three types of unit models are used in the area to replace the original unit, namely coal-fired, liquefied natural gas (LNG) and hydropower units. The original unit model is still used in area B. For specific model parameters and simulation design principles, please refer to the Tao, Wang Yuming, Liu Qianjin published "Q-learning algorithm for dynamic optimal allocation of CPS adjustment instructions in interconnected grids" (Proceedings of the Chinese Society for Electrical Engineering), such as image 3 shown. In order to improve the CPS qualification rate control goal, add load disturbances in the A region of the simulation model, including periodic load disturbances and random load distu...
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The invention discloses an interconnected power system CPS instruction dynamic allocation and optimization method. The interconnected power system CPS instruction dynamic allocation and optimization method comprises the following steps of (1) determining a control target, (2) determining a state discrete set S, (3) selecting balance units and determining a combined action discrete set A, (4) calculating the momentary value of ACE (k) and the moment value of CPS (k) in an area, (5) obtaining the instant reward value Ri (k) of each intelligent body, (6) calculating related equalization linkage strategies through linear equalization and equalization selection function, (7) carrying out corresponding operation on all units j, and (8) returning to the step (4) when a next control circle arrives. The interconnected power system CPS instruction dynamic allocation optimizing method has the advantages that frequent adjusting times of various units can be reduced effectively, the CPS control performance of an AGC system is improved, and the interconnected power system CPS instruction dynamic allocation optimizing method is especially suitable for the CPS instruction dynamic allocation and optimization of interconnected power systems in which thermal power is dominant and unit combination is complex.
Description
technical field [0001] The present invention relates to the technical field of electric power system automatic power generation control (secondary frequency regulation), in particular to a method for dynamic allocation and optimization of CPS commands in an interconnected grid. Allocation optimization. Background technique [0002] Since the control performance standard (ControlPerformanceStandard, CPS) was proposed in the automatic generation control (AutomaticGenerationControl, AGC) of the interconnected grid, the pass rate of the CPS has become an important factor affecting the AGC control strategy. One of the key steps of the AGC control system is to distribute the CPS general adjustment command to each AGC unit according to a certain optimization algorithm. [0003] The traditional AGC regulation power distribution adopts the average distribution method, which does not consider the differences among units, and cannot meet the needs of CPS regulation. In addition to re...
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IPC IPC(8): H02J3/46G06F19/00
Inventor 余涛张孝顺
Owner SOUTH CHINA UNIV OF TECH