Control method for battery energy storage system tracking wind-light planned output

A battery energy storage system and planned output technology, applied in flexible AC transmission systems, photovoltaic power generation, wind power generation, etc., can solve the problems of abandoning wind and solar energy, impact, and untrackable power generation of electric fields.

Active Publication Date: 2018-03-27
STATE GRID GASU ELECTRIC POWER RES INST +3
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Problems solved by technology

[0004] In view of the random and intermittent characteristics of wind farms and photovoltaic power stations, the actual power generated by the power field cannot track the planned power generation, which will cause a huge impact and impact on the safety, stability and power quality of the power grid, as well as the occurrence of abandoned power plants. The problem of wind abandonment

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  • Control method for battery energy storage system tracking wind-light planned output
  • Control method for battery energy storage system tracking wind-light planned output
  • Control method for battery energy storage system tracking wind-light planned output

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Embodiment Construction

[0081] 1. Theoretical basis

[0082] The schematic diagram of the predictive control principle is as follows: figure 1 shown.

[0083] Such as figure 1 middle y sp y(t) is the output value of the control object; 0 time represents the current time, and the curves on the left and right sides of 0 time represent the past and future output and control respectively; predictive control The algorithm is to output y according to the prediction p (k) and expected output y r (k) difference e(k), calculate the optimal control quantity u(k) that minimizes e(k) at the current and future L times.

[0084] Predictive control is to determine the future control role by achieving the optimal performance of a certain performance index. Optimal control in the traditional sense generally refers to the global optimum, while optimization in predictive control is a rolling optimization with a limited time period. That is to say, in predictive control, optimization is not performed offline once...

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Abstract

The invention provides a control method for a battery energy storage system tracking wind-light planned output based on model prediction control, aiming at the problems of huge impact and influence onsafety, stability, electric energy quality and the like of a power grid and the occurrence of wind-solar power abandoning phenomena caused by the facts that a wind power plant and a photovoltaic power station have the characteristics of randomness and intermittency and the actual generated power of the power plants cannot track the planned generated power. The control method improves the plannedoutput tracking capacity of an energy storage system in a wind and photovoltaic energy storage combined power generation system, smoothes wind and photovoltaic combined power generation output, playsa role in peak shaving and valley filling, and improves the wind and photovoltaic power generation utilization rate. The control method comprises the steps of: acquiring day-ahead power planned outputdata of the wind power plant and the photovoltaic power station, establishing an energy storage system power output model, planning a reference model trajectory, establishing an energy storage systemoutput closed-loop prediction model, performing rolling optimization on a control algorithm, calculating a control quantity satisfying minimization of a tracking desired trajectory optimized objective function, thereby realizing precise control of the energy storage system in tracking wind-light planned output.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation control, and relates to a control method for a battery energy storage system based on model predictive control to track the planned output of wind and solar. Background technique [0002] In recent years, due to the extremely high application value of using the energy storage system to track the planned output in wind-solar-storage combined power generation to improve the efficiency of wind-solar power generation, it can not only smooth the output of wind-solar combined power generation, cut peaks and fill valleys, but also reduce the phenomenon of abandoning wind and light , to improve the utilization rate of wind power generation, so the application of energy storage system tracking plan output in wind power storage combined power generation to improve the control problem of wind power generation efficiency has become a hot issue in recent years. [0003] At present, there ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/38H02J3/28
CPCH02J3/383H02J3/386H02J3/28H02J3/46H02J2203/20Y02E40/10Y02E70/30Y02E10/56Y02E10/76
Inventor 马喜平刘德顺董开松沈渭程董海鹰胡殿刚李韶瑜杨俊赵炜甄文喜闵占奎刘秀良李志敏魏博同焕珍张光儒梁有珍刘丽娟张赛朱宏毅姜梅王斌杨勇陈明忠陈柏旭李炜李小娟
Owner STATE GRID GASU ELECTRIC POWER RES INST
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