Power coordination control method and device for comprehensive energy system
An integrated energy system, coordinated control technology, applied in circuit devices, reducing/preventing power oscillation, and AC network load balancing, etc. Avoid the influence of system stability, reduce the amount of overcut, and improve the effect of economy
Inactive Publication Date: 2021-04-02
JIANGSU ELECTRIC POWER CO +1
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Problems solved by technology
These power coordination control strategies are prone to load or power over-cutting, and frequent switching of load or power will also cause large disturbances to the system and reduce the service life of the main power supply equipment.
Method used
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[0033] The present invention as figure 1 shown, including the following steps:
[0034] S1. Calculating the power deficit of the integrated energy system;
[0035] S2. Calculate the current output and output margin of the energy storage in PQ mode operation;
[0036] S2.1, if the energy storage output can be adjusted to complete the power coordination control, the control ends;
[0037] S2.2, if not, proceed to the next step;
[0038] S3. Follow step S2.2, set the PQ mode energy storage output to zero, combine the upper and lower limits of the allowable frequency, calculate the power deficit; combine the PQ mode energy storage output constraints, calculate the switching power range;
[0039] S4. Aiming at the minimum number of switching times, match the combination of switching loads or power sources;
[0040] S5. Adjust the energy storage output in PQ mode operation, correct the control error, and realize precise power control.
[0041] Firstly, after the power shortage ...
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The invention discloses a power coordination control method and device for a comprehensive energy system. The comprehensive energy system power coordination control method and device are used for accurately switching a load or a power supply by taking an energy storage operation mode, power margin and system stable operation constraint into consideration. The device comprises: a first calculationmodule, which is used for calculating the power vacancy of the comprehensive energy system; a second calculation module, which is used for calculating the current output and the output margin of operation energy storage in a PQ mode; a switching module, which is used for setting the energy storage output of the PQ mode to be zero, calculating power vacancy through combination of upper and lower limits allowed by frequency, and calculating a switching power range through combination with the output constraint of the energy storage of the PQ mode; a matching module, which is used for matching acombination of a switching load or a power supply by taking the minimum switching frequency as a target; and an adjusting module, which is used for adjusting the output of the operation energy storageof the PQ mode and correcting a control error. According to the invention, the over-switching amount of the system is effectively reduced, the economical efficiency of load control is improved, and the influence of frequent switching of the load or the power supply on the system stability is avoided.
Description
technical field [0001] The invention relates to the field of smart grids, in particular to a power coordination control method and device for an integrated energy system. Background technique [0002] Using micro-grid technology as a carrier to construct a multi-source coordinated integrated energy system is a feasible way for future small-scale energy systems. During the islanding operation of the system, the distributed power generation output inside the microgrid may change with changes in the external environment (such as sunshine intensity, wind, and weather conditions), making the frequency fluctuations inside the microgrid very large, so it is necessary to monitor the microgrid at any time. Changes in the internal frequency of the power grid, and take measures to deal with the impact on the safety and stability of the micro-grid due to sudden changes in internal power supply or load power. [0003] In the conventional power coordination control scheme, when the micro...
Claims
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IPC IPC(8): H02J3/00H02J3/28H02J3/24H02J3/38H02J3/46
CPCH02J3/00H02J3/28H02J3/24H02J3/241H02J3/381H02J3/466H02J3/472H02J2203/10
Inventor 陈猛曹斯明吴怡曹凯郑颖春汤永进丁保迪寇凌峰屈小云
Owner JIANGSU ELECTRIC POWER CO