Adaptive dynamic programming method for multi-goal joint optimized dispatching

A technology of dynamic programming and joint optimization, applied in wind power generation, AC network circuits, photovoltaic power generation, etc., can solve the problems of dimensional disaster and the inability of computers to bear the amount of calculation.

Active Publication Date: 2019-03-08
STATE GRID GANSU ELECTRIC POWER CORP +3
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  • Abstract
  • Description
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Problems solved by technology

[0003] The dispatching center usually obtains the optimal dispatching strategy according to the dynamic programming method, but this method has the disadvantage that the huge state space and the number of decision-making stages will cause the disaster of dimensionality, and the computer cannot bear such a huge amount of calculation

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  • Adaptive dynamic programming method for multi-goal joint optimized dispatching
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  • Adaptive dynamic programming method for multi-goal joint optimized dispatching

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Embodiment 1

[0118] An adaptive dynamic programming method for multi-objective joint optimal scheduling, which stores the waste heat in the exhaust gas of the gas turbine, uses the mechanism analysis method to establish the grid dispatching model of the composite system, and establishes the multi-objective function according to the minimum power generation cost and the minimum environmental cost ; Finally, the principle and goal of adaptive dynamic programming are given, and the process of obtaining the best optimal scheduling scheme by the heuristic adaptive dynamic programming algorithm is given.

[0119] When wind power and solar thermal power plants form a joint system to generate electricity, the solar thermal unit can reduce the uncertainty of wind power, but due to the large randomness and volatility of wind and solar output power, and its energy storage system is not enough to make the entire system To supply power to the grid smoothly, a stable and highly controllable backup power ...

Embodiment 2

[0121] A multi-objective joint optimal scheduling method of wind-solar-storage-gas based on adaptive dynamic programming, the specific implementation process is as follows:

[0122] 1. Establishment of optimal scheduling model

[0123] 1.1. Objective function

[0124] 1.1.1. Goal 1: Minimize the cost of power generation

[0125] In order to establish an economic dispatch model that achieves the goal of prioritizing the consumption of new energy, the energy penalty item of new energy is introduced into the objective function here, that is, the product of the energy penalty coefficient and the unconsumed amount of new energy is defined as the energy penalty item, and the value of the former The size directly reflects the degree of sacrificing the economy of gas-fired units to promote the consumption of new energy. The objective function is as follows:

[0126]

[0127] In the formula, t in the first term represents any period of the scheduling period; T is the total period...

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Abstract

The invention discloses an adaptive dynamic programming method for multi-goal joint optimized dispatching. The method is characterized in that afterheat in a gas discharged from gas turbines is stored, a power grid dispatching model of a compound system is established through the mechanism analysis method, and a multi-goal function is created according to the minimum power generation cost and theminimum environmental cost; and the principle and goals of adaptive dynamic programming are finally provided to represent a process in which the optimum optimized dispatching scheme is obtained through the heuristic adaptive dynamic programming algorithm. The method disclosed by the invention has the advantages that impacts of the wind and photovoltaic power outputting randomness, intermittence and volatility and low predication precision on stable operation and active balance of a power system can be greatly reduced, the possibility of wind or photovoltaic power curtailments can be lessened,integrated wind-photovoltaic-storage-gas outputting can be smoothened, peak-load shifting can be achieved, the system operation cost and the discharge control cost of a power generation system can begreatly lowered, and the system operation benefits can be improved, so that safe, stable and economical operation of the power system can be guaranteed.

Description

technical field [0001] The invention relates to an adaptive dynamic programming method for multi-objective joint optimal scheduling, belongs to the technical field of wind power grid connection, and is applied to optimal scheduling of distributed renewable energy power generation systems. Background technique [0002] In recent years, the uncertainty and volatility of intermittent new energy output have brought new challenges to power dispatching. In order to ensure the safe and economical operation of the power grid and promote the consumption of new energy, joint optimal dispatching is carried out by concentrating multiple types of power sources, thereby obtaining The optimal output and optimal scheduling strategy of the unit. [0003] The dispatching center usually obtains the optimal dispatching strategy according to the dynamic programming method, but this method has the disadvantage that the huge state space and the number of decision-making stages will cause the disas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38H02J3/46
CPCH02J3/382H02J3/383H02J3/386H02J3/00H02J3/46H02J2203/20Y02E10/56Y02E10/76
Inventor 马明汪宁渤董海鹰马彦宏张宏何世恩贠韫韵吕清泉韩旭杉李晓虎韩自奋丁坤李津王定美周强张健美王明松陈钊赵龙周识远黄蓉张金平张艳丽张睿骁张珍珍高鹏飞张彦琪
Owner STATE GRID GANSU ELECTRIC POWER CORP
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