Method for achieving power grid light storage system capacity configuration and optimization distribution
A system capacity, network optical storage technology, applied in the field of realizing the capacity configuration and optimal distribution of the optical storage system in the distribution network, can solve the problems of the accuracy and versatility of the energy storage system site selection, and achieve great flexibility and practical guidance. significance, improve the stability level, and reduce the effect of network loss
Active Publication Date: 2013-07-10
STATE GRID CORP OF CHINA +2
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In practical applications, it is generally determined by engineers and experience, which leads to a reduction in the accuracy and versatility of the location of the energy storage system
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[0053] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0054] This embodiment proposes a method for realizing the capacity configuration and optimized distribution of the optical storage system of the distribution network. The flowchart is as follows: figure 1 As shown, it includes the following steps:
[0055] (1) Establish a photovoltaic power generation grid-connected system model;
[0056] (2) Judge whether the system operation meets the constraint conditions through the initial power flow calculation, if yes, proceed to step (3), otherwise return to step (1) to modify the grid parameters;
[0057] Constraints include load constraints and operating constraints, among which:
[0058] The load constraint condition is: the active power and reactive power balance of any node in the grid.
[0059] The operating constraints are: the voltage of any bus, the power flow of any line and the power of a...
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The invention discloses a method for achieving power grid light storage system capacity configuration and optimization distribution. The method for achieving the power grid light storage system capacity configuration and the optimization distribution includes the following steps: (1) a photovoltaic electricity generation grid-connected system model is established; (2) the model is conducted with load flow calculation, and whether power grid operation meets constraint conditions is judged; if the power grid operation meets the constraint conditions, a next step is conducted; and if the power grid operation does not meet the constraint conditions, the step (1) is returned to, and a power grid parameter is modified; (3) initial emulating calculation is conducted to obtain an index value before energy storage system access; (4) N access points of an energy storage system are conducted with emulating calculation, so that an index value after the access is obtained; (5) an index of each access point is conducted with normalization processing, so that an objective subfunction is generated; (6) N objective functions with variable balance coefficients are obtained through the generated objective subfunction; (7) an assessment result is obtained through objective function computational analysis; and (8) the assessment result is conducted with optimal value choices. According to the method for achieving the power grid light storage system capacity configuration and the optimization distribution, a power grid is provided with fast active and reactive power support. The power grid voltage stability level is improved, and the network loss is lowered. Besides, the accuracy and the generality are improved.
Description
Technical field [0001] The invention belongs to the technical field of new energy, and specifically relates to a method for realizing capacity configuration and optimized distribution of an optical storage system of a power distribution network. Background technique [0002] In recent years, the installed scale of wind power and solar photovoltaic power generation has increased sharply. Although new energy is clean and environmentally friendly, it has unfavorable characteristics such as volatility, randomness, and intermittent power generation. Compared with thermal power, it cannot form a stable power supply, which is a safe and stable operation for the power system. Bring new pressure. With the continuous expansion of the scale of photovoltaic power generation systems and the continuous increase of the proportion of photovoltaic power sources in the system, photovoltaic grid-connected power generation has brought some adverse effects on the grid and has become unignorable. Whe...
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IPC IPC(8): H02J3/28
CPCY02E10/56Y02E70/30
Inventor 修晓青张雪莉惠东高志强唐宝锋孟良
Owner STATE GRID CORP OF CHINA
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