针对高比例可再生能源接入引起“输-配网双向潮流”带来配电网电压管理难题,该文提出一种应对双向潮流的配电网电压管理策略。首先,挖掘变压器模型对配电网电压控制特性的影响机理,量化双向潮流下变压器高/低压母线电压控制特性。其次,...针对高比例可再生能源接入引起“输-配网双向潮流”带来配电网电压管理难题,该文提出一种应对双向潮流的配电网电压管理策略。首先,挖掘变压器模型对配电网电压控制特性的影响机理,量化双向潮流下变压器高/低压母线电压控制特性。其次,为保证储能电池运行安全,基于电池实验数据,构建包含电池健康状态(state of health,SoH)、荷电状态及功率状态耦合关系的储能系统调节可行域,并采用分段线性化方式建立实用控制域模型,实现不同SoH下对储能充放电能力的实时约束。最后,基于可再生能源的渗透水平差异,提出多层次协调电压控制策略,减少双向潮流下配电网电压越限。通过改进IEEE 33系统算例验证所提方法在不同可再生能源渗透率场景下提供有效电压管控措施的科学性和实用性。展开更多
The distributed generator over the last 30years has posed several challenges when they are connected to a distributed network.The most immediate problem is to change the voltage at the connection point depending on th...The distributed generator over the last 30years has posed several challenges when they are connected to a distributed network.The most immediate problem is to change the voltage at the connection point depending on the power supplied to the network and may cause it to exceed statutory limits.This paper describes a new control scheme for a distributed generator for supporting the voltage control in the network,thus ensuring the distributed generator to contribute to network voltage management.The scheme performance is demonstrated by a model for a distributed generator connected to a distribution network.The result shows that using the new control scheme,the distribution network voltage constraints are maintained while maximizing the active power delivered by distributed generators.展开更多
文摘针对高比例可再生能源接入引起“输-配网双向潮流”带来配电网电压管理难题,该文提出一种应对双向潮流的配电网电压管理策略。首先,挖掘变压器模型对配电网电压控制特性的影响机理,量化双向潮流下变压器高/低压母线电压控制特性。其次,为保证储能电池运行安全,基于电池实验数据,构建包含电池健康状态(state of health,SoH)、荷电状态及功率状态耦合关系的储能系统调节可行域,并采用分段线性化方式建立实用控制域模型,实现不同SoH下对储能充放电能力的实时约束。最后,基于可再生能源的渗透水平差异,提出多层次协调电压控制策略,减少双向潮流下配电网电压越限。通过改进IEEE 33系统算例验证所提方法在不同可再生能源渗透率场景下提供有效电压管控措施的科学性和实用性。
基金supported by EPSRC SUPERGEN 1 Renewal Core-FlexNet:Renewal of the Supergen Consortium on Future Network Technologies.EPSRC GRANT Reference EP/E4011X/1
文摘The distributed generator over the last 30years has posed several challenges when they are connected to a distributed network.The most immediate problem is to change the voltage at the connection point depending on the power supplied to the network and may cause it to exceed statutory limits.This paper describes a new control scheme for a distributed generator for supporting the voltage control in the network,thus ensuring the distributed generator to contribute to network voltage management.The scheme performance is demonstrated by a model for a distributed generator connected to a distribution network.The result shows that using the new control scheme,the distribution network voltage constraints are maintained while maximizing the active power delivered by distributed generators.
