CN-121984034-A - Multi-type load ordered power allocation coordination management method

CN121984034ACN 121984034 ACN121984034 ACN 121984034ACN-121984034-A

Abstract

The invention discloses a multi-type ordered load power distribution coordination management method, which comprises the steps of constructing a micro-grid under the support of an energy storage system with dynamic regulation capacity and implementing a rotation limit strategy when power shortage exceeds the regulation capacity of demand response aiming at line faults caused by extreme weather events, establishing an upper layer objective function of an upper layer model by coordinating demand response plans and power distribution based on the rotation limit strategy, establishing a lower layer objective function of a lower layer model based on the maximization of load side profit of the rotation limit strategy, and obtaining an optimal power distribution management strategy through iteration between the upper layer model and the lower layer model. The invention realizes the integration of power distribution measures including alternate power limiting so as to reduce the loss caused by load interruption, effectively ensure the user income and reduce the load interruption loss in the recovery process.

Inventors

WANG YUWEI
TAN BICHENG
Ling Jiayan
LI JUNHUI
WANG DONG
WANG DINGHENG
SHI YIKE
GAO YUANHANG
LIU JIACHENG
SHI YU
ZHOU RUI
CHEN PEIGUANG
WANG JING
WANG YONG
LI BOQIANG
CHU YUNFEI
GAO JIAN

Assignees

国网吉林省电力有限公司经济技术研究院
东北电力大学

Dates

Publication Date: 20260505
Application Date: 20251219

Claims (6)

1. The multi-type load ordered power allocation coordination management method is characterized by comprising the following steps of: Aiming at line faults caused by extreme weather events, when the electric power shortage exceeds the regulation capacity of demand response, constructing a micro-grid under the support of an energy storage system with dynamic regulation capacity and implementing a rotation electricity limiting strategy; based on the alternate electricity limiting strategy, an upper objective function of an upper model is built by coordinating a demand response plan with electricity distribution and minimizing load loss; Based on the maximum profit of the load side of the alternate electricity limiting strategy, a lower objective function of a lower model is established; And obtaining an optimal power allocation management strategy through iteration between the upper model and the lower model.
2. A method of managing ordered power distribution of multiple types of loads according to claim 1 wherein the loads responsive to the power distribution management strategy in the alternating current limiting strategy include residential, industrial and commercial loads.
3. The method for coordinated management of multi-type load orderly power distribution according to claim 2, wherein the expression of the upper layer objective function is: ; Wherein: ; wherein: As a function of the object of the upper layer, In order to cut down the cost for the load, The utility model is used for the purchase of electricity for the main power grid, In response to the cost of the load excitation, For the cost of power generation of a distributed power supply, For the medical cost of the resident load, For the power demanded by node i at time t, For the power supplied by node i at time t, The load cost factor is cut for the unit of node i, For the unit price of electricity of the substation at node i, For the purchase power of node i at time t, For the set of substation nodes, The incentive costs are responded to for the ith industrial user participation demand, The incentive cost is responded to for the ith business user to participate in the demand, For a collection of industrial user nodes, For a set of business user nodes, The unit power generation cost for the distributed power supply at node i, For the output power of the distributed power supply at time t for node i, In the case of a distributed set of power supply nodes, Medical costs incurred during a power outage for the resident load of node i, Is a power failure resident user node set.
4. The method for coordinated management of multiple types of orderly-loaded power distribution according to claim 1, wherein the expression of the lower objective function is: ; ; wherein: As a function of the object of the lower layer, And The production profit and demand response profit for the industrial user and the commercial user respectively, For the production profit of the industrial user i, For the economic loss of the ith business user, Incentive benefits obtained for the industrial user i to participate in the demand response, Incentive benefits obtained for business user i to participate in demand response.
5. The method for coordinated management of multi-type ordered load power distribution according to claim 1, wherein iteration between an upper model and a lower model is achieved, and the method is characterized in that the lower model is replaced by a KKT method in the iteration solving process, an original double-layer model comprising the upper model and the lower model is reconstructed into a single-layer model, the single-layer model is processed by linearization methods such as a large M method, and the like, and the iteration solving is conducted by a CPLEX solver until the single-layer model converges.
6. The method for coordinated management of multiple types of orderly-loaded power distribution according to claim 1, wherein the power distribution management policy has the expression: ; ; ; ; ; ; ; ; ; wherein: For the power-on path from the start node to the end node in the distribution network, For the power-on path from the end node to the beginning node in the distribution network, As the starting end node, When n=m for the end node, and n is the substation node, The transformer station is a power supply point and is always in a power-on state, when n is a distributed power supply node with black starting capability, It means that such a distributed power supply with black start capability can be used as a backup power supply, but is not necessarily always powered on, when n is a non-power supply node, Indicating that the non-power node cannot serve as the power-on path starting point of the non-power node; For a collection of substations, For a distributed power supply set with black start capability, And The switching state and the fault state of the line nm at the time t are respectively, For the number of nodes in the distribution network, Is that Time of day The power-on state of the node, Is that Time of day The power-on state of the node, Is that Time of day The node is restored to the state and, Is that Time of day The node is restored to the state and, Is the maximum recovery of node n within a time instant, V is the total number of nodes for the moment.

Description

Multi-type load ordered power allocation coordination management method Technical Field The invention relates to the technical field of power systems, in particular to a multi-type load ordered power allocation coordination management method. Background High impact, low probability extreme weather events (such as hurricanes, storm snow, and floods) have produced significant impact on power systems in recent years. Particularly for power distribution systems, the impact is very severe. Therefore, improving the elasticity of the power distribution system is not enough to face high-impact low-probability events. To reduce the loss of critical loads in such events, the power distribution system may be divided into multiple island micro-grids that are maintained powered by distributed power sources. However, during high impact low probability events, demand within these microgrids supported by distributed power sources tends to increase, which can exacerbate supply-demand imbalances. The load participants usually have the characteristics of profit driving and risk avoidance, particularly under extreme disaster conditions, the load participants can reduce the influence willingness to market signals, and the load reduction cannot be completely avoided when the power is insufficient. Therefore, alternate power supply measures are taken for the affected area to avoid continuous power outage of the affected area. When the problem of electric power shortage is severe, the alternate electricity limiting measures can minimize the load interruption loss, and are important to improving the toughness of the system. Disclosure of Invention In order to solve the above problems, the present invention proposes a multi-type load orderly power distribution coordination management method capable of reducing loss caused by load interruption. In order to achieve the above object, the present invention is realized by the following technical scheme: the invention relates to a multi-type load ordered power allocation coordination management method, which comprises the following steps: Aiming at line faults caused by extreme weather events, when the electric power shortage exceeds the regulation capacity of demand response, constructing a micro-grid under the support of an energy storage system with dynamic regulation capacity and implementing a rotation electricity limiting strategy; based on the alternate electricity limiting strategy, an upper objective function of an upper model is built by coordinating a demand response plan with electricity distribution and minimizing load loss; Based on the maximum profit of the load side of the alternate electricity limiting strategy, a lower objective function of a lower model is established; And obtaining an optimal power allocation management strategy through iteration between the upper model and the lower model. A further improvement of the present invention is that the loads responsive to the power distribution management strategy in the alternating electricity limiting strategy include residential, industrial and commercial loads. The invention is further improved in that the expression of the upper layer objective function is: ; Wherein: ; wherein: As a function of the object of the upper layer, In order to cut down the cost for the load,The utility model is used for the purchase of electricity for the main power grid,In response to the cost of the load excitation,For the cost of power generation of a distributed power supply,For the medical cost of the resident load,Is a nodeAt the time ofIs used for the power demand of the (c) in the (c),Is a nodeAt the time ofIs used for the power supply of the electric motor,Is a nodeIs a unit cut load cost factor of (2),Is a nodeThe unit electricity price of the transformer station at the site,Is a nodeAt the time ofIs used for the purchase of electric power,For the set of substation nodes,Is the firstIndividual industrial users participate in demand response incentive costs,Is the firstIndividual business users participate in demand response incentive costs,For a collection of industrial user nodes,For a set of business user nodes,Is a nodeThe unit power generation cost of the distributed power supply at the location,Is a nodeAt the time ofIs provided with a distributed power supply for supplying power to the power supply,In the case of a distributed set of power supply nodes,Is a nodeMedical costs incurred during a power outage by the resident load of (a),Is a power failure resident user node set. The invention is further improved in that the expression of the lower layer objective function is: ; ; wherein: As a function of the object of the lower layer, AndThe production profit and demand response profit for the industrial user and the commercial user respectively,Is a nodeIs a production profit for the industrial user of (a),Is a nodeIs an economic loss for the commercial user of (a),Is a nodeThe industry users of (a) participate in the incent