Frequency control technology can achieve the purpose of energy saving of power equipment, but also bring problems of harmonic loss formula. The relationship between the loss rate and load rate is constituted by formul...Frequency control technology can achieve the purpose of energy saving of power equipment, but also bring problems of harmonic loss formula. The relationship between the loss rate and load rate is constituted by formula derivation, and calculate the load rate when the loss rate is the minimum and the total power of power-consuming devices. Then design the digital PID controller and research the power-saving optimization feedback algorithms and design the software process. Finally, carry out the inverter switching algorithm based on ABB ACS510 low voltage inverter.展开更多
特高压变压器是特高压电网的重要设备,其短路电压百分比UK%的选择会影响到电网的多个指标。在1 000 k V变电站的模拟系统平台,采用理论计算方法分析了特高压变压器UK%的变化对1 000 k V系统注入500 k V母线的短路电流值的影响;兼顾变压...特高压变压器是特高压电网的重要设备,其短路电压百分比UK%的选择会影响到电网的多个指标。在1 000 k V变电站的模拟系统平台,采用理论计算方法分析了特高压变压器UK%的变化对1 000 k V系统注入500 k V母线的短路电流值的影响;兼顾变压器负载率的改变和是否通过第3绕组进行无功补偿两个方面,通过选取特定范围内的变压器不同的UK%值,运用PSCAD仿真软件,分析和讨论了500 k V母线电压变化情况,得出特高压变压器UK%为15%~23%时任何值均能通过无功补偿或有载调压将500 k V母线电压控制在515~530k V的范围内的结论。此工作可为特高压变压器UK%的选择提供一定的参考。展开更多
文摘Frequency control technology can achieve the purpose of energy saving of power equipment, but also bring problems of harmonic loss formula. The relationship between the loss rate and load rate is constituted by formula derivation, and calculate the load rate when the loss rate is the minimum and the total power of power-consuming devices. Then design the digital PID controller and research the power-saving optimization feedback algorithms and design the software process. Finally, carry out the inverter switching algorithm based on ABB ACS510 low voltage inverter.
文摘特高压变压器是特高压电网的重要设备,其短路电压百分比UK%的选择会影响到电网的多个指标。在1 000 k V变电站的模拟系统平台,采用理论计算方法分析了特高压变压器UK%的变化对1 000 k V系统注入500 k V母线的短路电流值的影响;兼顾变压器负载率的改变和是否通过第3绕组进行无功补偿两个方面,通过选取特定范围内的变压器不同的UK%值,运用PSCAD仿真软件,分析和讨论了500 k V母线电压变化情况,得出特高压变压器UK%为15%~23%时任何值均能通过无功补偿或有载调压将500 k V母线电压控制在515~530k V的范围内的结论。此工作可为特高压变压器UK%的选择提供一定的参考。