使用终端电阻也有不利的一面，它（额外地）加重驱动器的负载，增加装置的复杂性，改变偏置条件和造成系统日后修改困难更大。
There are disadvantages of termination as well. Termination increases load on the drivers, increases installation complexity, changes biasing requirements and makes system modification more difficult.
但都由于输电系统的复杂性，而不能确定增设无功补偿装置的最佳容量和经济效益。
But owing to the complexity of power transmission systems, it is hard to determine the optimum capacity and economic benefit on adding devices for reactive compensation.
在国内外首次实现了无需鉴相装置的阶比跟踪，在安装和实现上大大简化，降低了阶比分析的使用成本和复杂性，开辟了阶比分析技术的新途径。
It greatly simplified Settings and implementation, with cost and complexity reduced, and opened a new path for order analysis. However, the researches are just in the preliminary stage and immature.
在国内外首次实现了无需鉴相装置的阶比跟踪，在安装和实现上大大简化，降低了阶比分析的使用成本和复杂性，开辟了阶比分析技术的新途径。
It greatly simplified Settings and implementation, with cost and complexity reduced, and opened a new path for order analysis. However, the researches are just in the preliminary stage and immature.
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