Mixed planning method for transmission network medium and long term development program
A hybrid, transmission grid technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as excessive investment, ignoring the probability of occurrence, and affecting the accuracy of calculations
Active Publication Date: 2017-06-20
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology
The advantages of deterministic planning criteria are clear thinking, easy to use, and low requirements for calculation tools; the main disadvantages are: 1. Only analyze the impact of accidents without considering the probability of occurrence, which is easy to cause problems such as over-investment; 2. Can not be well Dealing with Uncertainties in the Grid
The probabilistic programming criterion can deal with such problems better, but because it uses a large amount of statistical data, the randomness of the statistical data itself will affect the accuracy of the calculation
Method used
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Embodiment
[0167] The present invention takes the power transmission network in the south of Jiangxi Province as the research object, simulates and calculates its medium-term planning scheme for the next ten years, and verifies the effectiveness and economy of the proposed method.
[0168] figure 2 The system shown is the 500 / 220kV transmission network in the south of Jiangxi Province, where the upper limit of the number of lines in each channel is 3. Table 1 shows the relevant parameters of the line. Table 2 shows the initial load of each load point and the capacity of each generator set. Table 3 and Table 4 are the relevant parameters of node 4 and node 5 respectively. image 3 and Figure 4 are the payload duration curves of nodes 4 and 5, respectively. Among them, nodes 16, 17 and 21 only need to meet the N-1 criterion, and do not need to perform N-2 flexible constraint verification.
[0169] Table 1 Line parameters of the transmission system in the south of Jiangxi Province
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The present invention relates to a mixed planning method for a transmission network medium and long term development program. The method comprises: the step 1: setting a target function of a mixed planning model; the step 2: setting a power grid operation basic constraint condition; the step 3: employing an N-1 forced constraint condition and an N-2 flexible constraint condition to detect power grid; the step 4: determining a special economy constraint condition to reinforce the transmission network so as to satisfy the N-1 forced constraint and the N-2 flexible constraint; the step 5: determining a special reliability constraint condition; and the step 6: searching an optimal planning scheme for simulating calculation. The mixed planning method for the transmission network medium and long term development program integrates related constraints and parameters of a determinacy planning criterion and a probabilistic planning criterion, integrally considers planning scheme economy and reliability to convert the power grid development planning problem to a mixed integer linear planning problem, and searches the optimal planning scheme of the transmission network through a direct current power flow model and the business optimization software CPLEX; and moreover, the mixed planning method for the transmission network medium and long term development program has validity, flexibility and economy.
Description
technical field [0001] The invention relates to a power system planning method, in particular to a hybrid planning method for medium and long-term expansion planning of a transmission network. Background technique [0002] With the further deepening of the power industry reform, the structure of the power industry has undergone major changes. In order to survive and develop, power grid enterprises must consider the economics of power grid construction, operation and operation while ensuring the reliability of the power grid, so as to provide users with power supply with reasonable price and excellent reliability. Among them, grid planning, especially transmission grid expansion planning, is also facing new difficulties and challenges, such as: load forecasting, risk control and assessment, stability and power flow control, overvoltage and short-circuit analysis, resilience assessment, reliability assessment, network Loss assessment, economic analysis, new energy grid connec...
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Login to View More IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06313G06Q50/06Y04S10/50
Inventor 王一哲汤涌顾卓远韩奕杨德洲范雪峰夏懿宋汶勤张中丹杨昌海陈兆雁
Owner CHINA ELECTRIC POWER RES INST