《汉语拼音方案》 (Scheme for the Chinese Phonetic Alphabet) defines a standard pronunciation for each letter in Hanyu Pinyin with Zhuyin. In the case of V, it is defined as ㄪㄝ, using the otherwise-obsolete initial ㄪ(vō/v/). This is one of the only instances of the letter being used in standard Pinyin.
