This article recommands the defintion

term

and performance criterion of power energy quality

summaries the appliance scope and difference types of these criterions

analyzes emphasesly the main content of six national power energy quality standards that had been printsmaned

explains some methods to improve relative quality according to practical operation: Passive filter

active filter

SVC and so on

introduces their basic structure and principle

However these measures can only solve stable voltage quality problems. This paper presents the synthesis compensation technique in order to resolve dynamic energy quality problem. It is just root approach to restrain power quality question . This article takes resonable conclusion finally: It is more effective to apply FACTS and integrative compensation approach

and this is the direction to research power energy quality.