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Distributed automatic dispatching method for power system with accurate network loss calculation capability

A power system and automatic scheduling technology, which is applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as stability problems and low efficiency of centralized control, and achieve a lot of nodes, good scalability, and reduced communication costs. Effect

Active Publication Date: 2015-12-23
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The central controller usually needs high-bandwidth communication facilities to collect the information of the whole system, and also needs a high degree of connectivity, so when a point of failure occurs, there will be stability problems
Moreover, the topology of the future power grid and communication network is variable, which makes the efficiency of centralized control very low

Method used

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  • Distributed automatic dispatching method for power system with accurate network loss calculation capability
  • Distributed automatic dispatching method for power system with accurate network loss calculation capability
  • Distributed automatic dispatching method for power system with accurate network loss calculation capability

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0034] Such as Figure 9 As shown, the present invention provides a distributed automatic dispatching method of a power system capable of accurately calculating network loss, and the specific process is as follows:

[0035] First, use graph G to establish a model of the elements (busbar and transmission line) and the relationship between elements in the power system (information exchange between elements through communication facilities). Define G=(ν,ε,A), ν={ν 1 ,ν 2 ,...,ν nB} represents a vertex set, is the set of different vertex ...

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Abstract

The invention discloses a distributed automatic dispatching method for a power system with accurate network loss calculation capability. A power flow tracing method and an electrical dissecting method are creatively utilized to calculate the power loss of each generator. The invention provides a method for relatively accurately calculating network loss. By a two-layer consistency algorithm, the marginal cost tends to be consistent finally; each node has respective load and power generation information, so that the nodes have respective power deviations; the power deviation consistency is ensured by a relatively low layer with the average consistency; and the target that the incremental cost of each generator tends to be consistent is achieved by a relatively high layer with the incremental cost consistency. Through the distributed control algorithm, the economic dispatching problem in the power system can be solved under the condition of reducing the communication cost.

Description

technical field [0001] The invention relates to a generator power control method in a power system, in particular to a distributed dispatching scheme of a power system capable of accurately calculating network loss, and belongs to the technical field of power system economic dispatching. Background technique [0002] Emerging smart grid architectures help to further explore some of the fundamental challenges in power distribution systems, such as economic dispatch (ED). Economic dispatch means that the generator sets allocate the total required power to each generator set under the condition that the operating cost is the lowest and the power constraints of the generators are satisfied. Traditional solutions include λ iteration method and gradient search method, which are mainly used to solve the situation when the cost function is a convex function. Other more complex methods are used to solve the case when the cost function is non-convex, including genetic algorithm (GA),...

Claims

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Application Information

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IPC IPC(8): H02J3/46
Inventor 赵善驰吴英俊岳东
Owner NANJING UNIV OF POSTS & TELECOMM
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