Engineering Application Technology of UHV Hierarchical Controllable Shunt Reactor

doi:10.12204/j.issn.1000-7229.2022.10.006

Abstract

Abstract:

The 5 000 MW power collected by Zhangbei UHV substation put into operation at the end of 2020 is new energy. From the perspective of uncertainty of new energy output, the power flow of Zhangbei-Beijingxi line will change between 0 MW and 5 000 MW. Aiming at the uncertainty, a complete set of UHV hierarchical controllable shunt reactor (CSR) is applied for the first time. It solves the contradiction between reactive power compensation and limiting overvoltage on different requirements of shunt reactor in UHV transmission system, reduces reactive power loss, improves the flexibility of system regulation, and creates favorable conditions for the export of new energy in Zhangbei area. In the process of realizing the application of the first UHV CSR demonstration project, a series of innovative achievements have been made in integrated design and equipment development. The project selection starts with the problems of frequent and large voltage fluctuation on the UHV channel of new energy export. In the integrated design, the intensive design concept of CSR and thyristor valve lays the foundation for economy. These innovative achievements in the power system test stage and more than one year of actual operation of the UHV CSR are analyzed and summarized, and the optimization direction is put forward.

Key words: hierarchical controllable shunt reactor, integrated design, thyristor valve, thyristor electronic board, auxiliary reactor

CLC Number:

TM561

MAO Jibing, YU Jinsong, WANG Yan, WEI Menggang, CHAI Bin, GAO Yuan. Engineering Application Technology of UHV Hierarchical Controllable Shunt Reactor[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(10): 58-65.

Figures/Tables 11

Fig.1 Single line diagram of a CSR

Table 1 Parameters of UHV CSR

Table 2 Technical parameters of key equipment of Zhangbei UHV CSR

Fig.2 Electrical wiring diagram of a thyristor valve

Fig.3 Schematic diagram of working current waveform of thyristor valve V1

Fig.4 Schematic diagram of junction temperature change of thyristor valve V1

Fig.5 Photo of a UHV CSR thyristor valve

Fig.6 Measured waveform of TE power supply only by voltage

Fig.7 Measured waveform of TE power supply by both voltage and current

Fig.8 Waveform of automatic capacity adjustment from 100% to 67%

Fig.9 Waveform of automatic capacity adjustment from 67% to 33%

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