A Method for Evaluation of Frequency Response Capability of Power Grid Demand Side Response Resources
A technology of demand-side response and frequency response, applied in the direction of a single AC network with different frequencies, a single-network parallel feeding arrangement, etc., can solve problems such as slow response speed, high investment cost, and inability to fully consider the differentiated needs of users
Inactive Publication Date: 2018-03-23
TIANJIN UNIV
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Problems solved by technology
The centralized control strategy is to form geographically dispersed electric vehicles into clusters by introducing intermediate management agencies (such as energy-efficient power plants, etc.), and conduct unified optimization and dispatch management according to the needs of the power grid to achieve the best overall control effect. The disadvantage is that it cannot Fully consider the differentiated needs of users, and at the same time need to rely on a complex communication system, the response speed is slow, and the investment cost is high
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[0066] Taking electric vehicles as an example, the present invention studies the control effect of the present invention when it participates in dynamic frequency regulation of an actual large power grid under the environment of large-scale wind power grid connection, and analyzes the influence of electric vehicles participating in frequency control on the output of traditional generators. A simplified power system frequency research model is built on the SIMULINK simulation platform, such as Figure 10 shown.
[0067] In the calculation example, the electric vehicle aggregate participating in the frequency control of the large power grid contains 550,000 electric vehicles, which are connected to the large power grid test system according to the above model. In the environment of large-scale wind power grid-connected, wind power output fluctuates like image 3 shown. Due to the intermittent nature of wind power, a frequency deviation Δf will be generated in the grid. Contro...
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The invention relates to a method for evaluating the frequency response capability of power grid demand side response resources. The method divides the states of electric vehicles into four types: two-way controllable state, charging controllable state, reverse power supply controllable state, and uncontrollable state; If the charge-discharge curve of the electric vehicle is within the feasible range of charge-discharge, it is in a two-way controllable state; If the electric vehicle is in a non-parking state or its charge-discharge curve is at the boundary of mandatory charging, it is in an uncontrollable state; each electric vehicle is divided into four groups according to its state; according to the dynamic grouping Results Evaluation of electric vehicle frequency response capability. The invention can reflect the adjustable range and margin of the total charging and discharging power of the electric vehicle at each moment.
Description
technical field [0001] The invention belongs to the field of power grid demand side response control, and in particular relates to a method for evaluating the frequency response capability of an electric vehicle. Background technique [0002] The scale of renewable energy power generation continues to expand, providing a large amount of clean energy for the power system, alleviating environmental pressure, and promoting sustainable economic and social development. However, from the perspective of power system supply and demand balance, renewable energy has intermittent characteristics, and the grid integration of large-scale renewable energy has brought great challenges to the stability of the power system. The instability of renewable energy will not only increase the reserve capacity of the system, increase the operating cost of the system, but also have a great negative impact on the power quality, such as the grid frequency is more difficult to maintain stability. [00...
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IPC IPC(8): H02J3/38H02J3/02
Inventor 穆云飞孟健贾宏杰余晓丹
Owner TIANJIN UNIV