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Incompletely-observable PMU (phasor measurement unit) optimizing configuration method for grid system
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A technology for optimizing configuration and power grid system, applied in instruments, data processing applications, forecasting, etc., and can solve problems such as sufficient configuration
Inactive Publication Date: 2014-01-22
NORTHEAST GASOLINEEUM UNIV
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[0003] Due to the influence of economic factors in the actual process of configuring PMUs, in the case of a given number of PMUs configured in the power grid, it is impossible to configure a sufficient number of PMUs in the power system to make the system completely observable. The PMU optimal configuration scheme with the largest incremental value has more practical research significance and application value when the power grid investment funds are insufficient.
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Embodiment 1
[0054] Apply the optimal configuration algorithm to the IEEE14 node system, such as image 3 As shown, set the number of installed PMU devices to one. Table 1 shows the calculation results of the insignificant depth of the system with PMU installed at different nodes.
[0055]
[0056]
[0057] Table 1 Calculation results of unobservable depth values of the system with PMU installed at different nodes
[0058] Table 1 shows that the minimum value of the unobservable depth of the system where the PMU is installed on different nodes is 2, and 2 is used as the unobservable depth of the entire system. Therefore, there are five options for pre-installing a PMU device:
[0059] 1. If it is installed on node 2, nodes 1, 3, 4 and node 5 can be measured indirectly, then it can be known that the unobservable depth value of each node is: η(1)=η(2)=η(3)= η(4)=η(5)=0, η(6)=η(7)=η(8)=η(9)=1, η(10)=η(11)=η(12)=η (13)=η(14)=2, that is, the unobservable depth of the system ...
Embodiment 2
[0069] In the New England 39-node system, such as Figure 4 As shown in , the simulation of optimal configuration is performed when the number of PMUs installed is two. Through the calculation, it can be known that the results of the unobservable depth of the system installed at different nodes are 3, 4, 5, 6, 7, 8 and 9 respectively, and the calculation results of the minimum value of the unobservable depth of the system are shown in Table 3.
[0070]
[0071] Table 3 Calculation results of the system's unobservable depth value of 3 when two PMUs are configured
[0072] Table 3 shows that the minimum value of the unobservable depth of the system when two PMUs are installed is 3, and 3 is used as the unobservable depth of the entire system. Therefore, there are the following four options for pre-installing two PMU devices:
[0073] 1. If installed on nodes 4 and 17, nodes 3, 5, 14, 16, 18 and node 27 can be measured indirectly, then it can be known that the unobservable de...
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Abstract
The invention aims to design an incompletely-observable PMU optimizing configuration method for a grid system. The method is simple in algorithm and can give play to a PMU monitoring function as far as possible under the condition of limited capital. The technical scheme is as follows: under the condition that the PMU quantity is smaller than the quantity of grid nodes, the unobservable depths of PMUs are calculated when the PMUs are mounted in the grid system, limited optional schemes are obtained and taken as alternative schemes, and then probability reliability assessment is performed, so that an optimum PMU configuration scheme is obtained. With the adoption of the technical scheme, the PMU optimizing configuration scheme with the largest probability reliability increment value is determined, and when insufficient funds are invested into a grid, parts of configured PMU devices of a grid have actual application values.
Description
technical field [0001] The invention relates to a PMU optimal configuration method for a grid system, in particular to a PMU optimal configuration method for an incomplete grid system. Background technique [0002] Phasor Measurement Unit (PMU, Phasor Measurement Unit), as a high-precision and real-time measurement device, plays an important role in power systems that are increasingly complex and require stronger real-time performance, higher reliability and faster power flow calculations. very important role. However, due to the ubiquity of mature SCADA systems in the power grid and the high price of PMUs, it is more important to optimize the configuration of PMUs in the power grid. [0003] Due to the influence of economic factors in the actual process of configuring PMUs, in the case of a given number of PMUs configured in the power grid, it is impossible to configure a sufficient number of PMUs in the power system to make the system completely observable. The PMU optim...
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