无论是单位还是户外演出，我们在建设之初都要预先预算好系统功率;只有电路不出问题，以后的各类演出才能正常举行;那么一套
山东舞台灯光音响系统用电量怎么计算，下面带你了解一下。
Whether it is unit or outdoor performance, we should budget the system power in advance at the beginning of construction; Only if there is no problem with the circuit can the future performances be held normally; How to calculate the power consumption of a set of Shandong stage lighting and sound system? Let me show you.
一、为什么要计算用电量
1、 Why should we calculate the power consumption
计算电功率是为了估算设备用电量，来确定配电的容量;确定配电容量施工时才能知道每路电源线路需要什么样的电源线。
The calculation of electric power is to estimate the power consumption of equipment to determine the capacity of power distribution; Only when determining the distribution capacity can we know what power lines are needed for each power line.
二、基本的配电知识
2、 Basic power distribution knowledge
配电容量用单位办惫补视在功率，设备电功率单位办飞有功功率，需要有个功率因数做转化，功率因数一般取0.9比较符合目前的系统和技术。
The distribution capacity is based on the apparent power of unit kVA, and the electrical power of equipment is based on the active power of unit kw. A power factor is required for conversion. The power factor is generally 0.9, which is in line with the current system and technology.
叁、跟据音响，灯光，视频叁个系统估算用电量
3、 Estimate the power consumption according to the three systems of audio, light and video
1、音响系统
1. Audio system
电功率估算量=功率放大器功率+音响处理周边设备功率
Estimated electric power=power amplifier power+audio processing peripheral equipment power
以上说的设备功率都是设备标称的额定功率，直接在设备铭牌或说明书上找到就行，即设备长期稳定工作时的平均电功率;特别注意估算时不用考虑扬声器的功率，也不用考虑时序电源的功率，功率放大器的功率也不用乘以1.5之类的倍数。如果是有源扬声器，上面的公式中功率放大器功率换成有源扬声器功率即可。
The equipment power mentioned above is the nominal rated power of the equipment, which can be found directly on the equipment nameplate or manual, that is, the average electrical power of the equipment when it works stably for a long time; Pay special attention to the fact that the power of the speaker and the power of the timing power supply are not considered in the estimation, and the power of the power amplifier is not multiplied by a factor of 1.5. If it is an active speaker, the power of the power amplifier in the above formula can be replaced by the power of the active speaker.
2、灯光系统
2. Lighting system
电功率估算量1=需用系数虫直通或者调光柜的功率，需用系数根据系统的复杂程度和工艺特点不同，一般取值0.5到0.8为对于简单无需调光的系统而言。
The estimated electric power 1=demand coefficient x power of the direct or dimming cabinet. The demand coefficient varies according to the complexity of the system and the process characteristics. Generally, the value is 0.5 to 0.8 for a simple system without dimming.
电功率估算量2=灯具功率之和，灯光系统中灯具的功率占比大，调光台，网络节点设备等的功率可以忽略不计。
The estimated electric power 2=the sum of lamp power. The power of lamps in the lighting system accounts for a large proportion, and the power of dimmers, network node equipment, etc. can be ignored.
3、视频系统
3. Video system
视频一般是投影机和几个濒别诲大屏的功率，投影机的功率直接看额定功率，尝贰顿大屏的额定功率都是屏幕在亮度，白屏亮度时候测得的功率;大屏功率都是多少千瓦一个平方，跟据大屏的总面积计算出多少瓦用电量。
Video is generally the power of projectors and several large LED screens. The power of projectors depends directly on the rated power. The rated power of large LED screens is the power measured when the screen is at brightness and white screen brightness; The power of the large screen is how many kilowatts per square meter, and the power consumption is calculated according to the total area of the large screen.
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