A Method for Formulating Emergency Response Strategies for Power Grid Flexible Resources Based on Dynamic Programming
An emergency response and flexible technology, applied in the direction of power network operating system integration, circuit devices, climate sustainability, etc., can solve problems such as sacrificing interests, idle power plant resources, and rising costs of power generation and power supply, so as to simplify the complexity of problems and improve Calculation speed, the effect of ensuring safe operation
Active Publication Date: 2020-06-26
SOUTHEAST UNIV +1
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Problems solved by technology
When the power grid is in an emergency, measures such as forced power cuts are usually used to maintain the balance of power supply and demand, thereby alleviating the emergency state of the power grid. However, the use of these load management methods sacrifices the interests of users and affects the user's power consumption experience. It is not conducive to the interactive development and transformation of smart grid
In order to solve the increasingly serious imbalance between supply and demand and meet the ever-increasing user load demand, the country will invest a lot of money in the construction of peak-shaving power plants every year, but relying solely on increasing installed capacity to meet short-term peak loads will make a large number of power plants Idle resources are not conducive to the rational optimization of social resources, and eventually lead to an increase in the cost of power generation
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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0034] Such as figure 1 , the flexible resource emergency response strategy formulating method of the present invention comprises the following steps:
[0035] Step S1: Obtain the difference between the current frequency of the power grid and the rated frequency to determine the operating state of the power grid.
[0036] Since the rated frequency of the power grid is 50HZ, if the difference is recorded as ε, then ε=|f-50|, f is the current frequency of the power grid. If the difference is less than 0.2HZ, it means that the current power grid is in a normal state, otherwise it is in an emergency state.
[0037] Step S2, when the power grid is in an emergency state, obtain the power supply shortage P r and schedulable flexible resource capacity P d , select the corresponding emergency response plan;
[0038] Specifically, when selecting the corresponding ...
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The invention discloses a method for creating a grid flexible resource emergency response strategy based on a dynamic programming method, comprising the following steps of (1) obtaining a grid frequency difference to determine a grid operating state; (2) when a determined result indicates that the grid is in an emergency state, obtaining a power shortage amount and a schedulable flexible resourcecapacity to determine whether a frequency drop can be dealt with just by scheduling flexible resources including an energy storage device and a temperature control load; (3) if so, establishing a response model of the energy storage device and the temperature control load; (4) using the dynamic programming method to solve the flexible resource scheduling with the lowest electricity price based onthe power shortage amount, node electricity price prediction information, and the response model of the energy storage device and the temperature control load. The method alleviates the drop of the grid frequency by scheduling and optimizing social resources to the utmost extent, and solves the problem based on dynamic programming so as to increase a calculation speed.
Description
technical field [0001] The invention relates to a method for formulating an emergency response strategy for flexible resources of a power grid, in particular to a method for formulating an emergency response strategy for flexible resources of a power grid based on a dynamic programming method. Background technique [0002] With the continuous improvement of the national economy, the economic structural contradictions are becoming more and more prominent. The load of the power grid is increasing year by year. safe and stable operation. When the power grid is in an emergency, measures such as forced power cuts are usually used to maintain the balance of power supply and demand, thereby alleviating the emergency state of the power grid. However, the use of these load management methods sacrifices the interests of users and affects the user's power consumption experience. It is not conducive to the interactive development and transformation of smart grid. In order to solve the...
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IPC IPC(8): H02J3/32H02J3/14
CPCH02J3/14H02J3/32H02J2203/20Y02B70/3225Y04S20/222
Inventor 徐青山张凯恒夏勇李瑶虹任禹丞
Owner SOUTHEAST UNIV