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Distribution network distributed energy storage economic evaluation method and system based on operation strategy

A technology for distributed energy storage and economic evaluation, applied in the field of economic evaluation of distribution network distributed energy storage based on operation strategy, can solve the problems of affecting energy storage economics, increasing the effective output power cost of energy storage, and low cycle efficiency And other issues

Active Publication Date: 2018-12-18
STATE GRID CORP OF CHINA +3
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Problems solved by technology

On the other hand, the quantitative characteristics of the energy storage system also affect the economics of energy storage. For example, low cycle efficiency will increase the cost of effective output power of energy storage, and low cycle life will increase the total cost due to the need for high-frequency equipment updates. Therefore, in The impact of various quantitative characteristics of the energy storage system on the economy must be considered when conducting economic evaluation

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  • Distribution network distributed energy storage economic evaluation method and system based on operation strategy
  • Distribution network distributed energy storage economic evaluation method and system based on operation strategy
  • Distribution network distributed energy storage economic evaluation method and system based on operation strategy

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[0094] Such as figure 2 As shown, it is the calculation example structure of this embodiment. First, input the impedance value of the line element in the IEEE 33 node system, the active power and reactive power of the load element, and the connection relationship of the network topology. See Table 1 and Table 2 for detailed parameters; Enter 5 groups of wind turbines and 3 groups of photovoltaic systems, the power factor is 1.0, and the location and capacity are shown in Table 3; the optimization calculation time is 365 days a year, a total of 8760 hours, with a time interval of 1 hour, and the annual load of the area where the distribution network is located The curve, wind turbine annual output curve and photovoltaic annual output curve are shown in Figure 3; the time-of-use electricity price is shown in Table 4; 0.5MVA / 2MWh lead-acid battery, lithium-ion battery and all-vanadium redox flow battery are respectively connected to node 11 The three types of distributed energy ...

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Abstract

The invention relates to a distribution network distributed energy storage economic evaluation method and system based on operation strategy, which is characterized by comprising the following steps:1) according to a distribution system to be evaluated and an access scheme of the energy storage system, a simulation model is built, and relevant system parameters are input to obtain the operation parameters of the distribution system after being connected to the energy storage system; 2) Calculate the annual rate of return of the energy storage system according to the obtained operation parameters, the pre-constructed economic evaluation index and the economic operation model of the distributed energy storage system, and evaluate the economy of the distributed energy storage system of the distribution system. The economic operation model of distributed energy storage is established, which takes into account the actual situation of the electricity price in distribution system and distributed generation output. The economic evaluation results are more in line with the objective reality, and the calculation is simple, so it can be widely used in the economic evaluation of distributed energy storage in distribution network.

Description

technical field [0001] The invention relates to a distribution network distributed energy storage economic evaluation method and system, in particular to a distribution network distributed energy storage economic evaluation method and system based on an operation strategy. Background technique [0002] In recent years, distributed energy storage technology has achieved rapid development, and its application in power distribution systems has become more and more extensive. The energy storage system discharges during peak loads and recharges during low-valley loads to obtain economic benefits by using the peak-valley electricity price difference. At present, the high construction cost and poor return on investment of energy storage systems are the key factors restricting the further development of energy storage. How to make a reasonable evaluation of the economics of distributed energy storage has very important practical significance. [0003] At present, the economic evalu...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/008H02J2203/20H02J2310/64Y02B70/3225Y04S20/222
Inventor 原凯孙充勃宋毅杨卫红李鹏宋关羽赵天宇薛振宇靳夏宁胡丹蕾
Owner STATE GRID CORP OF CHINA
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