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A method for power system partitioning

A power system and power network technology, applied in the field of black-start partitions with optimal distribution of base PMUs, which can solve problems such as few constraints and no consideration of whether the sub-network satisfies the operating constraints.

Inactive Publication Date: 2020-06-19
STATE GRID CORP OF CHINA +3
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Problems solved by technology

However, these studies considered few constraints, and did not consider whether the subnetwork satisfies the operational constraints.

Method used

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  • A method for power system partitioning
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Embodiment Construction

[0081] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0082] Such as Figure 5 As shown, this embodiment provides a method for partitioning a power system, including steps:

[0083] S1. Solve the minimum PMU distribution problem:

[0084] Let f be a 0-1 variable to represent the distribution of PMUs in the system, and the i-th element of f is defined as:

[0085]

[0086] The optimal PMU distribution problem can be expressed by the following mathematical expression:

[0087]

[0088]

[0089] n represents the nth busbar, A=[a ij ] represents the network adjacency matrix, which is defined as follows:

[0090]

[0091] S2....

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Abstract

The invention provides a power system partitioning method in a system recovery process. In order to increase the system recovery speed, the invention provides a partitioning method which considers various constraints such as a capacity constraint of a black start power supply, power balance of an island, and island observability based on distribution of PMU in a power grid in a partitioning process. According to the method, applying a wide area measurement system (WARMS) enables the island formed in the system recovery process satisfy the observability requirement. According to the method, after the network is preliminarily partitioned, buses which do not satisfy the observability requirement are processed according to a rule, thereby finally obtaining a power system partitioning scheme which satisfies the constraints. The invention provides the power network partitioning method which uses the optimum PMU distribution in the power network, thereby accelerating system recovery in a black start process. The method ensures the observability of the formed island and satisfies various operating constraints comprising a classical load constraint and an observability constraint in WARMS.

Description

technical field [0001] The invention relates to a method for partitioning a power system, in particular to a method for partitioning a black start based on optimal distribution of PMUs. Background technique [0002] The black start of the power system refers to that after the entire power grid system is out of service due to a fault, through the start of the unit with self-starting capability in the system, also known as the unit with black start capability, it drives the unit without self-starting capability, and gradually expands the power supply range of the system, and finally realizes Restoration of the entire system. [0003] When the black start power point has been determined and the system has multiple black start power points, in order to improve the recovery speed of the power grid, the large-scale power grid should be divided into two or more subsystems to recover independently according to the structural characteristics of the power grid , each subsystem runs s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20
Inventor 高峰林昌年魏文辉王国平金逸费益军马强杨选怀韩佳兵陈捷周书进刘传良慈文斌史立勤
Owner STATE GRID CORP OF CHINA
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