Fast Cut Back Thermal Power Plant Load Rejection and Black Start Field Test Analysis

Zeng, Kaiwen; Wen, Juan; Ma, Longpeng; Cheng, Shijie; Lu, En; Wang, Ning

doi:10.3390/en7052740

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…(2) In this study, the proposed frequency control strategy, which adopts APOLC and OPTC as the main control pattern with improved pitch angular control as an auxiliary pattern, can effectively enhance the frequency stability of the system. At present, this paper only analyzes and discusses the single equivalent wind turbine as the black start power supply, the start-up path and the coordination control technology of considering the black start of multiple wind turbines are the next research work we need to carry out.…”

Section: Discussionmentioning

confidence: 99%

“…A black start entails power stations with the ability to self-start being first started and then gradually reconnected to the other stations to form an interconnected system again [1,2]. Conventionally, power sources with high operation reliability (e.g., pumped-storage power stations or gas turbine generating units) are utilized as a black start power supply.…”

Section: Introductionmentioning

confidence: 99%

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Frequency Control Strategy for Black Starts via PMSG-Based Wind Power Generation

et al. 2017

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Abstract:The use of wind power generation (WPG) as a source for black starts will significantly enhance the resiliency of power systems and shorten their recovery time from blackouts. Given that frequency stability is the most serious issue during the initial recovery period, virtual inertia control can enable wind turbines to provide frequency support to an external system. In this study, a general procedure of WPG participating in black starts is presented, and the key issues are discussed. The adaptability of existing virtual inertia control strategies is analyzed, and improvement work is performed. A new coordinated frequency control strategy is proposed based on the presented improvement work. A local power network with a permanent-magnet synchronous generator (PMSG)-based wind farm is modeled and used to verify the effectiveness of the strategy.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Frequency Control Strategy for Black Starts via PMSG-Based Wind Power Generation

et al. 2017

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“…Therefore, the number of subsystems will not exceed three. Black-start units are usually hydropower units or gas-turbine units [43,44], which can restart without off-site power and output cranking power quickly. These types of generating units are not limited by minimum active power output.…”

Section: Ieee 39-bus Test Systemmentioning

confidence: 99%

A Novel Sectionalizing Method for Power System Parallel Restoration Based on Minimum Spanning Tree

Zhang

et al. 2017

Energies

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Parallel restoration is a way to accelerate the black-start procedure of power systems following a blackout. An efficient sectionalizing scheme can reduce the restoration time of a system, taking into account the black-start ability, generation-load balance of subsystems, restoration time of branches, start-up time of generating units, and effects of dispatchable loads and faulted devices. Solving the sectionalizing problem is challenging since it needs to handle a large number of Boolean variables corresponding to the branches and nonlinear constraints associated with system topology. This paper investigates power system sectionalizing problem for parallel restoration to minimize the system restoration time (SRT). A novel sectionalizing method considering the restoration of generating units and network branches is proposed. Firstly, the minimum spanning tree (MST) algorithm is used to determine the skeleton network of a power system. Secondly, the number of subsystems is determined according to the number of black-start units. Based on the skeleton network, candidate boundary lines among subsystems are identified. Then, constraints are evaluated to identify feasible sectionalizing schemes. Except commonly used constraints on power balancing and black-start units, this paper also considers using dispatchable loads to meet the minimum output requirements of generating units. Finally, the sectionalizing scheme with the minimum SRT is selected as the final solution. The effectiveness of the proposed method is validated by the IEEE 39-bus and 118-bus test systems. The simulation results indicate that the proposed method can balance the restoration time of subsystems and minimize the SRT.

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“…Commonly used blackstart generators in the case of microgrid formation are hydro and diesel based. Thermal based generation, if equipped with load rejection capabilities [2], can be able to re-energize the network but it depends on how long the generator has been on no-load. Activities related to network re-energization include component (transformer, overhead lines, underground cables) re-energization, cranking up of non-blackstart units (motor energization) and load pickup [3].…”

Section: Introductionmentioning

confidence: 99%

Study on Re-Energization Capability of a Hybrid Windfarm under a Microgrid-based Restoration Strategy

Maina¹,

Nair²

2021

Preprint

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Under a microgrid based (bottom-up) restoration strategy, considering a disaster related outage, the local generation is required to energize and supply the unaffected part of the network. Considering 100% renewable generation, only hydro based generation systems, if well equipped, can be able to blackstart and re-energize the network. Wind Energy Conversion Systems (WECSs) have been restricted to the latter stages of restoration due to their source intermittency and non-dispatchability and in order for them to participate in the initial restoration stages, voltage and frequency support auxiliary devices are required. This paper investigates the capability of a hybrid windfarm to participate in the initial stages of restoration similar to a conventional blackstart unit: Re-energization of the various network components and pick up of load. The auxiliary equipment in this case is a dump load to absorb excess power produced by the windfarm and a synchronous condenser to provide a stable voltage reference required for normal operation of the WECS. Firstly, the nominal range of operation is determined with an additional pitch control mode linking the dump load power to individual WECSs introduced for frequency control. Flicker and harmonics are investigated in determination of the hosting capacity. Studies are undertaken to investigate energization of transformers, underground cables, overhead lines and other non-blackstart units (including other WECSs). Consideration is given to Type 1 and Type 3 WECSs to investigate the capability of a non-inverter and inverter based WECS. MATLAB/Simulink has been used as the simulation platform due to its modelling flexibility.

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Fast Cut Back Thermal Power Plant Load Rejection and Black Start Field Test Analysis

Cited by 10 publications

References 17 publications

Frequency Control Strategy for Black Starts via PMSG-Based Wind Power Generation

Frequency Control Strategy for Black Starts via PMSG-Based Wind Power Generation

A Novel Sectionalizing Method for Power System Parallel Restoration Based on Minimum Spanning Tree

Study on Re-Energization Capability of a Hybrid Windfarm under a Microgrid-based Restoration Strategy

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