Principle and Application of Asynchronous Operation of China Southern Power Grid

Zhou, Baorong; Rao, Hong; Wu, Wei; Wang, Tong; Chen, Hong; Dongqi, Huang; Yao, Wei; Su, Xiangrui; Mao, Tian

doi:10.1109/jestpe.2018.2830409

Cited by 52 publications

(37 citation statements)

References 6 publications

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“…By comparing the phasor diagram of the proposed method with that of the AC filterless LCC HVDC, it can be observed that the series capacitor affects the converter performance from two main aspects. Firstly, it reduces the magnitude of I 2 sec . This is beneficial as it leads to a smaller current that flows into the converter transformer (therefore lower power losses).…”

Section: A Circuit Analysismentioning

confidence: 99%

“…T HE adverse impacts of Commutation Failure (CF) on power system are originated from the resulting disruption or cessation of active power transfer of LCC HVDC link [1], [2]. For CF that does not cause converter blocking, the transient reduction of transferred active power leads to frequency fluctuations.…”

Section: Introductionmentioning

confidence: 99%

“…For CF that causes converter blocking, 1) the cessation of active power transfer can lead to considerable supply and demand mismatch of the AC system at the inverter side. This could then result in reserve activation at the inverter side and tripping of generators at the rectifier side [1]; 2) the transfer of active power to the parallel AC lines can cause overloading problem to those AC lines [2] and even trigger cascaded protection tripping. One of the severe consequences of such cascaded tripping is partial blackout of the AC system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Xue

Zhang

Yang

2019

IEEE Trans. Power Syst.

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Section: A Circuit Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Xue

Zhang

Yang

2019

IEEE Trans. Power Syst.

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“…In the case of the HVDC systems, a Frequency Limit Control [8], [22] can be implemented, exploiting the fast ramp characteristics offered by the power electronics. In the case of frequency variation, the HVDC can provide an excess or a reduction of power in order to compensate for the frequency oscillation.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Primary Frequency Regulation Using Load Power Control by Smart Transformers

Carne

Buticchi

Liserre

et al. 2019

IEEE Trans. Smart Grid

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In the last years the energy production share of power electronics-based generators has kept increasing with respect to the synchronous generation. These power electronicsresources do not offer rotational inertia, resulting in a decrease of the total system inertia and thus in larger frequency deviations during disturbances. Among several corrective solutions studied in literature, controlling the load consumption is a promising one. Fast in power response and widely distributed in the grid, load control is able to work as power reserve (both upwards and downwards) during frequency variations. In this regard, a Smart Transformer (ST) based solution is proposed. The ST is able to shape load consumption accurately by means of an On-Line Load sensitivity Identification-based (OLLI) control, and can support the primary frequency regulation in the power system. This paper presents an ST-based Real Time Frequency Regulation (RTFR) controller that varies load consumption by means of a voltagebased load control, in response to the frequency deviation in the power grid. The proposed method is described analytically and tested by means of a Power-Hardware-In-Loop experiments, in order to show the effectiveness of the RTFR controller in real time conditions and applications.

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“…In recent years, to deal with the issues of uneven distribution of power sources and loads in different regions, long-distance and large-capacity ultra/extra-high voltage transmission techniques have been widely applied to power grids in China. Large-scale AC-DC interconnected power grids have been formed in several regional power grids such as the China Southern Power Grid and the East China Power Grid [1][2][3][4]. In an AC-DC interconnected power grid, there are several AC and DC transmission channels to transmit electric energy among different regions.…”

Section: Introductionmentioning

confidence: 99%

A Mixed-Integer Second-Order Cone Programming Algorithm for the Optimal Power Distribution of AC-DC Parallel Transmission Channels

Lin¹,

Yang²,

Fan³

et al. 2019

Energies

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For the controllability of the transmission power of DC transmission channels, the optimal power distribution (OPD) of AC-DC parallel transmission channels is an effective measure for improving the economic operation of an AC-DC interconnected power grid. A dynamic optimal power flow model for day-ahead OPD of AC-DC parallel transmission channels is established in this paper. The power flow equation constraints of an AC-DC interconnected power grid and the constraints of the discrete regulation requirement of the transmission power of DC channels are considered, which make the OPD model of the AC-DC parallel transmission channels a mixed-integer nonlinear non-convex programming (MINNP) model. Through a cone relaxation transformation and a big M method equivalent transformation, the non-convex terms in the objective function and constraints are executed with the convex relaxation, and the MINNP model is transformed into a mixed-integer second-order cone programming model that can be solved reliably and efficiently using the mature optimization solver GUROBI. Taking an actual large-scale AC-DC interconnected power grid as an example, the results show that the OPD scheme of the AC-DC parallel transmission channels obtained by the proposed algorithm can effectively improve the economical operation of an AC-DC interconnected power grid.

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Principle and Application of Asynchronous Operation of China Southern Power Grid

Cited by 52 publications

References 6 publications

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Real-Time Primary Frequency Regulation Using Load Power Control by Smart Transformers

A Mixed-Integer Second-Order Cone Programming Algorithm for the Optimal Power Distribution of AC-DC Parallel Transmission Channels

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