Method and device for energy storage system participating in primary frequency control of power grid
A technology of energy storage system and grid frequency, applied in the direction of AC network load balancing, etc.
Active Publication Date: 2018-01-02
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology
When the energy storage system participates in the frequency control of the power grid, the frequency modulation characteristics of the power system can be improved through reasonable control of the energy storage system, which has better economy. However, there is still a lack of research on the energy storage system participating in the frequency regulation of the power grid.
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[0089] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0090] figure 1 It is a flowchart of a method for an energy storage system to participate in the primary frequency control of the power grid provided by an embodiment of the present invention, as shown in figure 1 As shown, the detailed steps of the method are as follows:
[0091] Step 1: The energy storage system monitors the grid frequency and the state of charge (SOC, State of Charge) of the energy storage system in real time. When the grid frequency deviation exceeds the maximum frequency deviation allowed by the grid, it enters the next step of judgment; State of charge SOC of the energy...
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The invention provides a method and a device for an energy storage system for participating in primary frequency control of a power grid. The method comprises the following steps: monitoring a grid frequency and a charged state of the energy storage system; if a grid frequency deviation does not exceed the maximum frequency deviation, monitoring the grid frequency and the charged state of the energy storage system in cycle; if the grid frequency deviation exceeds the maximum frequency deviation, determining that the energy storage system participates in the primary frequency control of the power grid according to the deviation direction of the grid frequency deviation and the charged state of the energy storage system; if primary frequency modulation starting conditions are met, starting a virtual inertial response and primary variable droop control; and adding power adjustment values of the virtual inertial response and the primary variable droop control to obtain a total active power control instruction and giving the instruction to the energy storage system, thereby achieving the primary frequency control. The method can significantly improve the frequency change amplitude and the steady speed in frequency disturbance of the power grid by quick response ability of the energy storage system, and improves the load disturbance resistance of the power grid.
Description
technical field [0001] The invention relates to the technical field of power grid frequency control, in particular to a method and device for an energy storage system participating in primary frequency control of a power grid. Background technique [0002] With the increase of power demand, the peak-to-valley difference of power grid load continues to increase, which puts forward higher requirements for power system frequency regulation, and requires more regulated power supplies with fast response. The frequency control in the traditional frequency modulation technology is to maintain the balance between the generated power and the load demand through the rapid increase and decrease of the output power. However, the characteristics of generators, such as slow response and low climbing rate, can easily lead to: 1) due to slow climbing, the scheduling target cannot be achieved quickly and re-scheduling can be realized quickly, so all regional control error corrections cannot ...
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IPC IPC(8): H02J3/28
CPCH02J3/28
Inventor 吴林林刘辉白恺崔正湃李娜王皓靖徐海翔李蕴红江浩
Owner NORTH CHINA ELECTRICAL POWER RES INST