Open Micro-Dynamic Simulation and Monitoring System for Power System

Abstract

The invention discloses an open micro dynamic simulation and monitoring system for a power system. The simulation and monitoring system comprises a micro power generation simulation unit, a micro power transformation simulation unit, a micro power transmission simulation unit, a micro load simulation unit and a micro monitoring simulation unit, wherein the micro power generation simulation unit is sequentially connected with the micro power transformation simulation unit and the micro load simulation unit to form a micro power grid; and the connecting end of the micro power grid is connected with the micro monitoring simulation unit. According to the simulation and monitoring system, the defects of the conventional power system dynamic simulation system and a low-voltage power system dynamic simulation system are overcome; simulation devices (such as line simulation and power transformation simulation) are standardized to facilitate networking; and a power management unit (PMU) device is used for acquiring power grid information, computationally analyzing power grid data, and transmitting a corresponding control command to take automatic control measures, thereby realizing control over the monitoring and scheduling of the whole power grid.

Description

technical field [0001] The invention relates to an open micro dynamic simulation and monitoring system of a power system integrating power generation, power transmission, power transformation and load. Background technique [0002] At present, the research methods of power system mainly include mathematical simulation and physical simulation. [0003] To carry out mathematical simulation, it is necessary to write out the mathematical equations of physical phenomena under certain assumptions and solve them with the help of special mathematical calculation tools. However, since the power system is a complex system integrating steady state and transient state, there are often large errors between the analysis results and actual results of mathematical simulation, which cannot fully reflect its physical process; All links must be able to list mathematical equations, which also limits the research on new fields and phenomena in power systems. [0004] The power system dynamic s...

AI Technical Summary

Problems solved by technology

But the shortcoming of this kind of dynamic simulation experiment system is that it condenses all the equipment of the power system into a "black box", so that its application range is greatly limited, such as it is difficult to connect new relay protection and automatic devices for testing ; Without the existence of real objects, it is impossible to give students an intuitive understanding, which greatly reduces its application value in teaching

[0010] At the same time, the low-voltage power system dynamic simulation system (application number: 201210536598.7) also has great deficiencies: (1) The quality control method of the output power at the generator end adopts the AC-DC-AC control method, that is, first passes through the low-voltage rectification device Convert the AC power output from the generator end into DC power, and then convert the DC power into AC power through a low-voltage inverter, so as to realize the control of power quality. This method uses power electronic devices such as rectifiers and inverters, and power electronic devices Its own vulnerability will make it the weakest link that restricts power generation simulation; moreover, the generator outlet has an inverter, which will not be able to accurately simulate problems such as short-circuit current distribution and synchronization stability; and power electronic devices are prone to generate harmonics to pollute the power grid , the investment is also very large; (2) The load simulation uses self-developed low-voltage devices or even weak current devices, which cannot well simulate the real loads of various dynamic characteristics of the power system; (3) does not specify the line, transformer The standard of electrical and other analog devices is not convenient for building large-scale systems; (4) The monitoring and control system of the entire network is not designed, and the operation status of the entire network cannot be grasped, including node voltage, power, harmonics, etc., and cannot be sent to the entire network. dispatch control command

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