Zone optimization method for high-voltage power distribution network
A technology of zoning optimization and grid zoning, applied in the field of power transmission and transformation to achieve the effect of improving reliability
Inactive Publication Date: 2018-11-23
STATE GRID CORP OF CHINA +1
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However, this literature needs to be further improved in terms of improving the reliability of grid partitioning
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[0041] A high-voltage distribution network partition optimization method, comprising the following steps:
[0042] Step 1: Establish a mathematical model with "partition load balance" as the objective function;
[0043] Step 2: Use the improved genetic algorithm to analyze the opening and closing of the switches between the communication channels in each partition
[0044] Perform permutation and combination calculations to obtain the 220 kV power grid partition optimization strategy;
[0045] Step 3: Establish evaluation indicators, and use the actual power grid as an example to analyze and verify the power grid
[0046] Effectiveness of partition optimization strategies.
[0047] The load balance in the partition in the step 1 is used as the objective function of the partition optimization model, and the objective function is: Max D i =Min(D i,n，max -D i,n ), where: D i is the partition load balance degree under the i-th power grid partition mode, D i,n is the normal ...
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The invention provides a zone optimization method for a high-voltage power distribution network. The zone optimization method comprises 3 steps: obtaining an operation mode and a partitioning mode ofa connection channel between zones by researching connection relations and on-off states of the connection channels between all the zones; performing permutation and combination calculation on on-offconditions between the connection channels by adopting an improved genetic algorithm by taking the load equilibrium in each zone as a target function; and laying out feasible operation modes accordingto a stipulated operation mode, and finding out a best permutation and combination solution from these operation modes. Optimization results are compared from the aspects of the load equilibrium, thetransmission loss and a main transformer load rate and are calculated by taking an actual power grid for example, so that the validness of the zone optimization method is verified, and the problems of large calculation amount and low efficiency in a traditional genetic algorithm and the problem of generation of an electromagnetic looped network or overproof short circuit current due to the fact that most solutions are unfeasible are avoided.
Description
technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to a partition optimization method for a high-voltage distribution network. Background technique [0002] With the continuous development of China's transmission grid, urban interconnected grids will inevitably encounter new challenges while effectively alleviating transmission pressure, enhancing system stability, and resisting small disturbances. Among them, the emergence of 500 / 220 kV high and low voltage electromagnetic ring network and the increase of short-circuit current level in 220 kV system are two significant problems. In order to open the high-voltage and low-voltage electromagnetic ring network, the grid structure needs to be adjusted to limit the increase in the short-circuit current level caused by the system interconnection and capacity increase. The method of replacing the circuit breaker cannot be simply adopted. Therefore, the grid st...
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IPC IPC(8): H02J3/00H02J3/26
CPCH02J3/00H02J3/26H02J2203/20Y02E40/50
Inventor 余晓鹏李科田春筝李秋燕李锰全少理付科源张艺涵孙义豪郭勇杨卓关朝杰郭新志丁岩
Owner STATE GRID CORP OF CHINA