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Direct current isolated island operational stability closed loop simulation detection equipment and detection method

A DC island and closed-loop simulation technology, which is applied in electrical testing/monitoring, instruments, simulators, etc., can solve problems such as weak fault tolerance of simulation parameters and model deviations, unsuitable DC island systems, etc., and achieve the effect of accurate analysis of stability

Inactive Publication Date: 2014-08-27
POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the DC island system itself is a precise small system, compared with the large system, the DC island system has weaker fault tolerance to simulation parameters and model deviations
However, the simulation detection equipment and detection methods in the prior art are not suitable for DC island systems

Method used

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  • Direct current isolated island operational stability closed loop simulation detection equipment and detection method
  • Direct current isolated island operational stability closed loop simulation detection equipment and detection method
  • Direct current isolated island operational stability closed loop simulation detection equipment and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A closed-loop simulation detection device for DC island operation stability, such as figure 1 As shown, a power station monitoring system 100, an excitation control system 200, a governor electrical regulation system 300, a governor actuator system 400, a UHV DC control and protection system 500, a real-time simulation system 600, an interface interaction system 700 and a power Amplifier 800.

[0037]The first output end 611 of the real-time simulation system 600 is connected to the fourth input end 724 of the interface interaction system 700, the third output end 713 of the interface interaction system 700 is connected to the first input end 621 of the real-time simulation system 600, and the The first output terminal 711 of the interface interaction system 700 is connected to the first input terminal 821 of the power amplifier 800, and the first output terminal 811 of the power amplifier 800 is connected to the first input terminal 121 of the power station monitoring...

Embodiment 2

[0042] A closed-loop simulation detection device for DC island operation stability, the other structures are the same as in Embodiment 1, the difference is that it also has the following technical features:

[0043] The real-time simulation system 600 is an RTDS (Real Time Digital Simulation) simulator. RTDS power system real-time simulation equipment, developed by Canadian RTDS technology company. The all-digital real-time simulator is composed of computing chip RSCAD, computing processor and other hardware equipment Rack, including supporting workstations or microcomputers, which can continuously and real-time conduct electromagnetic transient simulation research of power systems.

[0044] The real-time simulation system 600 performs real-time simulation calculations on large-scale hydroelectric generator sets, DC transmission systems and corresponding AC transmission lines. Specifically, the power supply part of the DC island system includes the electromagnetic transient s...

Embodiment 3

[0072] A closed-loop simulation detection method for DC island operation stability, which is carried out by using the DC island operation stability closed-loop simulation detection device described in the above embodiment 1 or 2, and the real-time simulation system 600 is connected to the large water wheel through the interface interaction system 700 and the power amplifier 800 The actual control device of the generating set is connected, and the real-time simulation system 600 is connected with the large-capacity UHV DC control and protection system 500 through the interface interaction system 700;

[0073] The real-time simulation system 600 is used to perform real-time simulation calculations on large-scale hydroelectric generating units, DC transmission systems, and corresponding AC transmission lines. The control device collects the working condition signals of the real-time simulation system 600 and performs calculation processing to obtain control information. The control...

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Abstract

Provided are direct current isolated island operational stability closed loop simulation detection equipment and a detection method. The equipment is provided with a power station monitoring system, an excitation control system, a governor electrical regulating system, a governor actuator system, an extra-high voltage direct current control protection system, a real-time simulation system, an interface interactive system and a power amplifier. The power station monitoring system, the excitation control system and the governor electrical regulating system collect control observation quantity of the real-time simulation system through the interface interactive system and the power amplifier and input control information to the real-time simulation system, and the extra-high voltage direct current control protection system carries out control operation on a direct current transmission system. The detection method is carried out through the equipment. The direct current isolated island operational stability closed loop simulation detection equipment and the detection method can detect frequency stability, voltage stability, machine-network coordination control characteristics of a high-capacity direct current isolated island system, shorten the period of field tests, avoid risks of the field tests, improve safety stability of electric power system operation, and has the advantages of being flexible in operation control, high in precision of simulation results and the like.

Description

technical field [0001] The invention relates to the technical field of power system stability, in particular to a closed-loop simulation detection device and a detection method for DC island operation stability. Background technique [0002] With the completion and commissioning of the large-capacity UHVDC transmission system, its huge transmission capacity has significantly improved the power transmission capacity of the power system. The UHV DC transmission system refers to the ±800kV level standard. However, when the large-capacity UHV DC system runs in parallel with the AC system, the DC part will have a greater impact on the stability of the main grid frame of the AC grid. System transient instability and other issues. In order to reduce the impact of large-capacity UHV DC blocking faults on the safety and stability of the power grid, the large-capacity DC transmission system needs to adopt an island operation mode, that is, the DC rectifier station and the sending-en...

Claims

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Application Information

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IPC IPC(8): G05B17/02G05B23/02
Inventor 李伟郭琦韩伟强黄立滨李书勇关红兵袁艺
Owner POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID
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