Method for restoring power supply in power system
A technology for power supply recovery and power systems, applied in information technology support systems, electrical components, circuit devices, etc., can solve problems such as difficult weight coefficients, large calculation burdens, and existing obstacles, so as to shorten optimization time and control combined explosion problems , The effect of increasing the amount of load recovery
Inactive Publication Date: 2013-10-23
WUHAN UNIV
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[0008] Another purpose of the present invention is to solve the difficulty in determining the weight coefficients in the synthesis of multiple optimization objectives in the power supply recovery model existing in the prior art; to solve the overall optimization of the power supply recovery model, the possible solution space is very large, resulting in a large calculation Burden, technical problems such as obstacles in practical application; provide a double-layer optimization that can quickly perform load recovery and network reconfiguration optimization, realize power supply recovery in the power-off area, and realize power quality (frequency) constraints in the recovery area , a power system power supply recovery method that is more in line with the actual operation of the microgrid
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[0075] A power system power supply restoration method is characterized in that the method comprises the following steps:
[0076] Step 1. Carry out scene discrimination according to the power grid operation status provided by the power grid data collection and monitoring control system; the scenarios are divided into 4 types:
[0077] Scenario 2.1, the lower-level power grid and the upper-level power grid operate independently;
[0078] Scenario 2.2, the lower-level power grid and the upper-level power grid are connected to the grid, but the download power of the upper-level power grid is greatly reduced;
[0079] Scenario 2.3. The lower-level power grid is separated from the upper-level power grid, and an internal disconnection fault occurs;
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The invention relates to a method for restoring power supply, in particular to a method for restoring power supply in a power system. In the method, the power supply restoration strategy adopts the islanding algorithm based on connectivity of the short circuit fast recognition network. The method has the following advantages: adopting optimization of tangential load of the intelligent optimization algorithm and network reconfiguration, dividing the optimization process into two parts, respectively establishing mathematical models, reducing the optimization variable dimension and the quantity of combination, shortening the optimization time, effectively controlling the combination explosion and solving the problem of weight values of multiple objective functions; and adopting the flexible power flow algorithm, introducing power quality (frequency) constraint into power supply restoration in the power system, taking the static characteristic of the engine into consideration, using the system frequency as the constrain condition of power supply restoration and improving the load restoration quantity.
Description
technical field [0001] The invention relates to a power supply recovery method, in particular to a power system power supply recovery method. Background technique [0002] With the continuous expansion of the scale of the interconnected grid, the structure of the grid is becoming more and more complex. Once a fault or stability problem occurs, it may cause a large-scale power outage. Power system recovery control is an important means to ensure the reliability of power supply, and its task is to restore power supply safely, quickly and economically after a blackout occurs. With the interconnection of large power grids and the rapid growth of loads, the scale of the power system is becoming larger and larger, and local faults are likely to spread to the entire network and cause large-scale power outages. At the same time, the market-oriented reform of the electric power industry makes the operation of the system closer and closer to its limit, which also increases the probab...
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IPC IPC(8): H02J13/00H02H7/26
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 林涛徐遐龄赵璐毕玥
Owner WUHAN UNIV
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