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Load recovery optimization method considering unit state in system recovery process

A technology for unit status and system recovery, applied in the power grid field, can solve the problems of not taking into account the starting characteristics of thermal power generating units, the time delay of hot start generators, and reducing the recovery efficiency of power systems, achieving easy solutions, high engineering value, and models. simple effect

Inactive Publication Date: 2020-04-17
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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  • Application Information

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Problems solved by technology

However, in the above studies, the start-up characteristics of thermal power generating units were not taken into account. In the grid reconfiguration, the load recovered by the unit is only the load on the optimal recovery path, and the load not on the recovery path is recovered by other lines. extra recovery time
However, due to the start-up characteristics of thermal power generating units, the additional recovery time may cause a time delay for hot-starting generators and reduce the recovery efficiency of the power system
Therefore, it is necessary to take into account the start-up characteristics of the thermal power generating set, establish a suitable model, and optimize the load recovery within the time interval between the maximum hot start time and the minimum cold start time of the generating set; but there is no effective optimization in the prior art Program

Method used

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  • Load recovery optimization method considering unit state in system recovery process
  • Load recovery optimization method considering unit state in system recovery process
  • Load recovery optimization method considering unit state in system recovery process

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Embodiment

[0102] (1) Example scene

[0103] Taking the IEEE10-machine 39-node system as an example, the power grid topology is as follows: figure 2 As shown, the self-starting unit at node 30 is a pumped storage power station, and the generating units at nodes 31-39 are all thermal generating units, which have time limits for cold and hot start-up. The parameters of each generating unit are shown in Table 1 below. The recovery time of each transmission line is 4 minutes, and the starting sequence of the generator set is known, which is 37-33-35-34-32-31-38-39-36.

[0104] Table 1

[0105]

[0106] (2) Analysis of load recovery optimization results

[0107] The load recovery line and unit start-up time obtained by solving the load recovery optimization method considering the unit state in the system recovery process described in this patent are shown in Table 2, and the load recovery results without considering the unit state are shown in Table 3. The comparison of the load restor...

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Abstract

The invention discloses a load recovery optimization method considering a unit state in a system recovery process. Load optimization considering the unit state is established by utilizing a logic preference description language, a nonlinear model of load recovery is established, the model is solved by adopting an artificial bee colony algorithm, and a load recovery line and time considering the unit state are obtained. The method comprises the following steps of: 1, constructing a load optimization grading knowledge base considering a unit state in a system recovery process, 2, establishing aload optimization preference strategy set considering the unit state in the system recovery process, 3, establishing a load recovery optimization model considering the unit state in the system recovery process, and 4, solving the load recovery optimization model by adopting an artificial bee colony algorithm to obtain a recovery line and time of the load considering the unit state in the system recovery process. According to the method, load recovery in the system recovery process can be optimized, important loads are ensured to be rapidly recovered, and a reasonable load recovery scheme is provided.

Description

technical field [0001] The invention belongs to the technical field of power grids, in particular to a load recovery optimization method considering the state of a unit in the system recovery process. Background technique [0002] With the continuous development of the national economy, the demand for electricity from all aspects of society is increasing, and the scale of the power system is also expanding. With the development of the power grid, the connection between the networks is getting closer and closer, the structure of power components is becoming more and more complex, and the probability of large-scale power outages caused by small-scale power grid failures is also increasing. Because the operating environment of the power system is very complex, natural disasters, power supply in short supply, aging power lines and human misoperation may cause failures. Once an accident occurs, it will cause economic loss and social impact. In severe cases, small-scale accident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 周前程亮朱寰汪成根崔红芬吴盛军杨波陈哲张宁宇李虹仪谢云云
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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